WO2014119797A1 - Thrust bearing - Google Patents

Thrust bearing Download PDF

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Publication number
WO2014119797A1
WO2014119797A1 PCT/JP2014/052560 JP2014052560W WO2014119797A1 WO 2014119797 A1 WO2014119797 A1 WO 2014119797A1 JP 2014052560 W JP2014052560 W JP 2014052560W WO 2014119797 A1 WO2014119797 A1 WO 2014119797A1
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WO
WIPO (PCT)
Prior art keywords
oil passage
thrust bearing
sliding
collar
lubricating oil
Prior art date
Application number
PCT/JP2014/052560
Other languages
French (fr)
Japanese (ja)
Inventor
林　元司
Original Assignee
大豊工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大豊工業株式会社 filed Critical 大豊工業株式会社
Publication of WO2014119797A1 publication Critical patent/WO2014119797A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • F01D25/166—Sliding contact bearing
    • F01D25/168—Sliding contact bearing for axial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/024—Units comprising pumps and their driving means the driving means being assisted by a power recovery turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/051—Axial thrust balancing
    • F04D29/0513—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/23—Gas turbine engines
    • F16C2360/24—Turbochargers

Definitions

  • the present invention relates to a technology of a thrust bearing arranged to face a thrust collar provided on a shaft.
  • Patent Document 1 the technology of a thrust bearing disposed opposite to a thrust collar provided on a shaft has been publicly known. For example, as described in Patent Document 1.
  • the thrust bearing described in Patent Document 1 is disposed to face a thrust collar provided on the shaft.
  • the thrust bearing is configured to be able to support a thrust load that slides against the thrust collar and acts in the axial direction of the shaft.
  • the thrust bearing is formed of a sliding material having relatively excellent seizure resistance and wear resistance, and can prevent seizure and abnormal wear (damage) on the sliding surface with the thrust collar.
  • the entire thrust bearing is formed of a sliding material having relatively excellent seizure resistance and wear resistance, the sliding material is relatively expensive, and thus there is a problem that the manufacturing cost is increased. there were.
  • the entire thrust bearing is formed of a relatively inexpensive material (for example, an iron-based material)
  • the iron-based material is inferior in seizure resistance and wear resistance than the sliding material.
  • seizure on the surface and abnormal wear (damage) cannot be sufficiently prevented.
  • the present invention has been made in view of the above circumstances, and the problem to be solved is that the manufacturing cost can be made relatively low, and seizure and abnormal wear (damage on the sliding surface with the thrust collar) can be achieved. ) And the like can be sufficiently prevented.
  • the thrust bearing of the present invention is a thrust bearing disposed opposite to the thrust collar provided on the shaft, and is formed of a sliding material and slides with respect to the thrust collar; A second member formed of a material different from the sliding material and fitted on the first member.
  • the outer peripheral edge portion of the first member is provided with a groove portion in which the central portion in the width direction is recessed inward.
  • the groove portion extends in the circumferential direction of the outer peripheral edge portion, and the one end portion and the other end portion communicate with each other.
  • a lubricating oil passage for supplying lubricating oil to a sliding surface of the first member with the thrust collar is provided, and the lubricating oil passage is formed on the first member.
  • the first member oil passage includes the first member oil passage, and the groove portion is used as a part of the first member oil passage.
  • the lubricating oil passage includes a second member oil passage formed in the second member, and a discharge port of the second member oil passage is formed so as to face the groove portion.
  • the first member oil passage is provided with a communication passage that communicates the groove and the insertion hole inserted through the shaft.
  • the communication passage of the first member oil passage is provided from the central portion in the width direction of the groove portion in a direction perpendicular to the axial direction of the insertion hole.
  • the thrust bearing of the present invention is used for a turbocharger.
  • the first member having a sliding surface with the thrust collar is formed by the sliding member, and the second member having another surface (which does not slide with the thrust collar) is formed from the sliding member.
  • the inner diameter of the groove portion is reduced (in the width direction) when the first member is thermally expanded. Therefore, the influence on the second member can be reduced.
  • the groove portion makes one round of the outer peripheral edge portion of the first member when the one side end portion and the other side end portion communicate with each other, thereby further reducing the influence on the second member. Can be made.
  • the first member can be cooled by the lubricating oil flowing through the groove.
  • the lubricating oil passage is formed by combining oil passages having a relatively short length, so that the entire lubricating oil passage can be easily processed.
  • the processing can be made easier.
  • the turbocharger can reduce the manufacturing cost relatively and can sufficiently prevent seizure and abnormal wear (damage) on the sliding surface between the thrust bearing and the thrust collar. it can.
  • FIG. 1 is a side sectional view showing an overall configuration of a turbocharger including a thrust bearing according to a first embodiment of the present invention. Similarly, the disassembled perspective view which showed the structure of the thrust bearing.
  • FIG. 3B is a cross-sectional view taken along line AA in FIG. Similarly, the front view which showed the structure of the sliding part.
  • FIG. 5B is a cross-sectional view taken along the line CC in FIG.
  • the side sectional view showing the composition of the thrust bearing.
  • FIG. (A) Similarly, a partially enlarged portion in FIG. (B) The schematic diagram which showed the structure of the lubricating oil path similarly. Similarly, the disassembled perspective view which showed the arrangement configuration of the thrust bearing. Similarly, the side sectional view showing the arrangement configuration of the thrust bearing.
  • the vertical direction, the horizontal direction, and the front-back direction are defined according to the arrows shown in the figure.
  • the turbocharger 1 is for sending compressed air into the engine cylinder. As shown in FIG. 1, the turbocharger 1 mainly includes a shaft 10, a turbine 20, a compressor 30, and a bearing housing 40.
  • the shaft 10 is arranged with its longitudinal direction (axial direction) directed in the front-rear direction.
  • the compressor wheel 32 is fixed to one end (rear end) of the shaft 10
  • the turbine wheel 22 is fixed to the other end (front end) of the shaft 10.
  • the shaft 10 connects the compressor wheel 32 and the turbine wheel 22.
  • the shaft 10 is rotatably supported in the bearing housing 40.
  • the turbine 20 is disposed in front of the bearing housing 40.
  • the turbine 20 mainly includes a turbine housing 21 and a turbine wheel 22.
  • the turbine housing 21 contains the turbine wheel 22.
  • the turbine housing 21 is fixed to the front end of the bearing housing 40 and is formed so as to cover the turbine wheel 22.
  • the turbine wheel 22 is fixed to the shaft 10 and is configured to be rotatable integrally with the shaft 10.
  • the compressor 30 is disposed behind the bearing housing 40.
  • the compressor 30 mainly includes a compressor housing 31 and a compressor wheel 32.
  • the compressor housing 31 contains the compressor wheel 32.
  • the compressor housing 31 is fixed to the rear end of the bearing housing 40 and is formed so as to cover the compressor wheel 32.
  • the compressor wheel 32 is fixed to the shaft 10 and is configured to be rotatable integrally with the shaft 10.
  • the bearing housing 40 supports the shaft 10 so as to be rotatable.
  • the bearing housing 40 is mainly provided with a sliding bearing portion 41, a thrust bearing portion 42, and an oil supply oil passage 45.
  • the sliding bearing portion 41 is a portion that supports the shaft 10 so as to be rotatable.
  • the sliding bearing portion 41 has a circular cross section and is formed so as to penetrate the bearing housing 40 in the front-rear direction.
  • the sliding bearing portion 41 is provided with a sliding bearing 43 for smoothly rotating the shaft 10.
  • the slide bearing 43 is fitted on the shaft 10.
  • the thrust bearing portion 42 is a portion for supporting a thrust load that acts in the axial direction of the shaft 10.
  • the thrust bearing portion 42 is formed on the rear side surface of the bearing housing 40. More specifically, a recess recessed toward the front is formed on the rear side surface of the bearing housing 40. The space formed by the concave portion becomes the thrust bearing portion 42.
  • a thrust bearing 100 for supporting a thrust load is disposed in the thrust bearing portion 42. The configuration of the thrust bearing 100 will be described later.
  • the oil supply oil passage 45 is a hole for supplying (oil supply) lubricating oil to the slide bearing 43 and the thrust bearing 100.
  • the oil supply passage 45 extends downward from a housing oil supply port 48 provided on the upper side surface of the bearing housing 40.
  • the extension end portion (lower end portion) is connected to a first housing discharge port 49 provided in the sliding bearing portion 41.
  • the housing oil supply port 48 and the first housing discharge port 49 communicate with each other, and the lubricating oil can be supplied to the slide bearing portion 41 (and thus the slide bearing 43).
  • a second oil supply passage 46 in which the oil supply oil passage 45 is branched is formed in the middle of the oil supply oil passage 45 in the vertical direction.
  • the second oil supply passage 46 extends rearward from a branch portion with the oil supply passage 45.
  • the extension end portion (rear end portion) is connected to the second housing discharge port 50 provided in the thrust bearing portion 42.
  • the housing oil supply port 48 and the second housing discharge port 50 communicate with each other, and the lubricating oil can be supplied to the thrust bearing portion 42 (and thus the thrust bearing 100).
  • the turbine wheel 22 is rotated by high-temperature air (exhaust gas) after combustion in the cylinder of the engine. Then, the rotation of the turbine wheel 22 is transmitted to the compressor wheel 32 via the shaft 10, and the compressor wheel 32 is rotated.
  • the compressed air can be supplied to the cylinder of the engine by rotating the compressor wheel 32.
  • a thrust bearing 100 shown in FIGS. 1 and 2 is a member for supporting a thrust load acting in the axial direction (front-rear direction) of the shaft 10. As shown in FIG. 2, the thrust bearing 100 is mainly composed of a main body portion 110 and a sliding portion 120. Further, the thrust bearing 100 is provided with a lubricating oil passage 130 (see FIG. 7 and the like) for circulating lubricating oil. *
  • the main body 110 is made of a ferrous material that is a relatively inexpensive material.
  • the main body 110 is formed in a flat plate shape and is arranged with its plate surface facing in the front-rear direction.
  • the main body 110 is formed in a substantially C shape with the opening side facing downward when viewed from the front. More specifically, the main body 110 is formed in a shape in which a substantially circular member in front view is cut out from below to above while leaving the central portion of the main body 110.
  • the main body 110 is provided with an attachment hole 111, a pin hole 112, an oil passage feeding portion 113, and a first oil passage 114.
  • the attachment hole 111 is formed in a substantially circular shape in a front view in the approximate center of the main body 110.
  • the mounting hole 111 penetrates the main body 110 in the front-rear direction and is formed with its axis centered in the front-rear direction.
  • the inner diameter of the mounting hole 111 is formed to be slightly shorter than the outer diameter of the sliding part 120.
  • the pin hole 112 shown in FIGS. 2 and 3 is a hole for positioning the thrust bearing 100.
  • the pin hole 112 is formed in the upper left part of the main-body part 110 in a substantially perfect circle shape by front view.
  • the pin hole 112 penetrates the main body part 110 in the front-rear direction and is formed with its axis oriented in the front-rear direction.
  • the pin hole 112 is inserted with a pin (not shown) when the thrust bearing 100 is disposed in the bearing housing 40 (more specifically, the thrust bearing portion 42). As a result, the position of the thrust bearing 100 is determined, and the thrust bearing 100 is prevented from rotating.
  • the oil passage feeding portion 113 is formed in the upper center of the main body portion 110 and above the attachment hole 111.
  • the oil passage feeding portion 113 is formed by cutting away from the front side surface of the main body portion 110 toward the rear. More specifically, the oil passage feeding portion 113 is formed in the shape of the rear half of a substantially conical shape with the apex directed upward, and is opened so as to face the front from the front side surface of the main body portion 110.
  • the oil passage feeding portion 113 is disposed to face the second housing discharge port 50 of the second oil supply oil passage 46 and is connected to the second housing discharge port 50.
  • the lubricating oil can be supplied from the bearing housing 40 (oil supply oil passage 45 and second oil supply oil passage 46) to the thrust bearing 100 (oil passage supply portion 113).
  • the first oil passage 114 shown in FIGS. 2 and 3 is a part of the lubricating oil passage 130 and is an oil passage constituting the upstream side of the lubricating oil passage 130.
  • the first oil passage 114 is drilled in the main body 110.
  • the first oil passage 114 extends rearward and downward from a first oil passage inlet 115 opened on the lower surface of the oil passage feeding portion 113.
  • An extension side end portion (downstream side end portion) of the first oil passage 114 is connected to a first oil passage discharge port 116 opened above the inner peripheral surface of the attachment hole 111.
  • the oil passage feeding portion 113 and the mounting hole 111 are communicated with each other by the first oil passage 114. That is, the lubricating oil supplied to the oil passage feeding portion 113 can be supplied to the mounting hole 111 through the first oil passage 114.
  • the sliding portion 120 is made of a sliding material having relatively excellent seizure resistance and wear resistance (compared to the iron-based material).
  • the sliding part 120 is comprised with the copper-type material as a sliding material.
  • the sliding part 120 is formed in a flat plate shape and is arranged with its plate surface facing in the front-rear direction.
  • the sliding part 120 is formed in a substantially annular shape when viewed from the front.
  • the outer diameter of the sliding part 120 is formed to be slightly longer than the inner diameter of the mounting hole 111 of the main body part 110.
  • the length of the sliding part 120 in the front-rear direction is formed to be substantially the same as or slightly longer than the length of the main body part 110 in the front-rear direction.
  • the sliding portion 120 is provided with an insertion hole 123, a taper portion 124, a groove portion 125, and a third oil passage 126.
  • the insertion hole 123 shown in FIGS. 2, 4 and 5 is a hole through which the shaft 10 is inserted (via a second collar 12 described later).
  • the insertion hole 123 is formed in a substantially circular shape when viewed from the front in the approximate center of the sliding portion 120.
  • the insertion hole 123 penetrates the sliding part 120 in the front-rear direction and is formed with its axis centered in the front-rear direction.
  • the inner diameter of the insertion hole 123 is formed to be slightly longer than the outer diameter of a cylindrical portion 12a of the second collar 12 described later.
  • the taper portion 124 is formed on each of the front side surface and the rear side surface of the sliding portion 120. More specifically, the tapered portion 124 is formed as a portion where the front side surface and the rear side surface of the sliding portion 120 are gently inclined in the circumferential direction. A plurality of tapered portions 124 are formed on the front side surface and the rear side surface of the sliding portion 120 with appropriate intervals in the circumferential direction (with a flat portion set shorter in the circumferential direction than the tapered portion 124). In the present embodiment, four tapered portions 124 (colored portions in the drawing) are formed on the front side surface and the rear side surface of the sliding portion 120, respectively.
  • a front extension portion 121 is formed at the front portion of the outer peripheral edge portion of the sliding portion 120.
  • the front side extending portion 121 is formed by extending the front side surface of the sliding portion 120 in the outer diameter direction.
  • a rear extension portion 122 is formed at the rear portion of the outer peripheral edge portion of the sliding portion 120.
  • the rear side extension portion 122 is formed by extending the rear side surface of the sliding portion 120 in the outer diameter direction.
  • a gap between the front extension 121 and the rear extension 122 is formed as a groove 125.
  • the groove part 125 extends in the circumferential direction of the outer peripheral edge part of the sliding part 120, and the one side end part and the other side end part are communicated with each other.
  • the groove 125 is formed in a substantially annular shape when viewed from the front.
  • the third oil passage 126 is perforated inside the sliding portion 120.
  • the third oil passage 126 extends from the third oil passage inlet 127 opened on the bottom surface of the upper portion of the groove portion 125 toward right below. That is, the third oil passage 126 is formed to extend in the vertical direction, and is provided in a direction perpendicular to the axial center (front-rear) direction of the insertion hole 123.
  • the third oil passage inlet 127 is formed at the center in the front-rear direction (width direction) on the bottom surface of the upper portion of the groove 125.
  • the extension side end portion (downstream side end portion) of the third oil passage 126 is connected to a third oil passage discharge port 128 opened on the upper side of the inner peripheral surface of the insertion hole 123.
  • the groove part 125 and the insertion hole 123 are communicated with each other by the third oil passage 126. That is, the lubricating oil filled in the groove part 125 described later can be supplied to the insertion hole 123 via the third oil passage 126.
  • the sliding part 120 is attached to the attachment hole 111 of the main body part 110. More specifically, the sliding portion 120 is attached to the attachment hole 111 by being press-fitted into the attachment hole 111 of the main body 110. As described above, the outer diameter of the sliding portion 120 is slightly longer than the inner diameter of the mounting hole 111 of the main body 110. That is, the portion formed slightly longer in the outer diameter of the sliding portion 120 is configured as a press-fit allowance.
  • the outer peripheral surface of the sliding part 120 (more specifically, the outer peripheral surfaces of the front extension part 121 and the rear extension part 122)
  • the inner peripheral surface of the mounting hole 111 of the main body 110 is in close contact with the gap.
  • the thrust bearing 100 is formed in a substantially flat plate shape in which the front side surface and the rear side surface are flush with each other. Are arranged in the front-rear direction.
  • the sliding portion 120 is attached to the main body 110 by press-fitting, but the present invention is not limited to this. That is, attachment of the sliding part 120 to the main body part 110 may be performed by other methods such as welding.
  • the opening part of the groove part 125 of the sliding part 120 (that is, the gap between the front extension part 121 and the rear extension part 122). Is closed by the inner peripheral surface of the mounting hole 111 of the main body 110. That is, as shown in FIG. 7, the groove part 125 is partitioned as a substantially square-shaped sealed space in a side sectional view. The space is filled with lubricating oil as will be described later.
  • the space (a space defined by the groove 125 and the inner peripheral surface of the mounting hole 111) is referred to as a “second oil passage 129”.
  • the second oil passage 129 is a space defined by the groove portion 125 and the inner peripheral surface of the mounting hole 111. That is, the second oil passage 129 extends in the circumferential direction of the outer peripheral edge portion of the sliding portion 120 similarly to the groove portion 125, and the one end portion and the other end portion are communicated.
  • the second oil passage 129 is formed in a substantially annular shape in front view.
  • the outer peripheral surface of the sliding portion 120 (more specifically, the outer peripheral surfaces of the front extension portion 121 and the rear extension portion 122) and the inner peripheral surface of the mounting hole 111 of the main body portion 110 are in close contact with each other with almost no gap ( Therefore, when the second oil passage 129 is filled with lubricating oil, the filled lubricating oil is configured not to leak.
  • the lubricating oil passage 130 is formed by the sliding portion 120 (more specifically, the lubricating oil supplied to the oil passage feeding portion 113 by the oil supply oil passage 45 and the second oil supply oil passage 46 of the bearing housing 40). This is an oil passage for supplying to the sliding surfaces of the first collar 11 and the second collar 12.
  • the lubricating oil passage 130 is the second oil passage defined by the first oil passage 114 provided in the main body portion 110, the groove portion 125 of the sliding portion 120, and the inner peripheral surface of the mounting hole 111 of the main body portion 110. 129 and the third oil passage 126 provided in the sliding portion 120.
  • the first oil passage 114 is formed in a linear shape inclined obliquely in a side view.
  • the first oil passage outlet 116 of the first oil passage 114 is formed so as to face the second oil passage 129 (that is, the groove portion 125 of the sliding portion 120).
  • the third oil passage 126 is formed in a straight line extending in the up-down direction in a side view.
  • the third oil passage inlet 127 of the third oil passage 126 is disposed slightly forward from directly below the first oil passage outlet 116 of the first oil passage 114 and faces the second oil passage 129. Formed.
  • first oil passage outlet 116 of the first oil passage 114 and the third oil passage inlet of the third oil passage 126 are arranged to be shifted in the front-rear direction in a side view, and the second oil passage 129 Are formed so as to face each other.
  • the lubricating oil passage 130 as a whole, with respect to the elongated oil passage extending in the generally vertical direction formed by the first oil passage 114 and the third oil passage 126, It is formed so that the upper center of the oil passage (second oil passage 129) formed in a substantially annular shape intersects.
  • the thrust bearing 100 when the thrust bearing 100 is disposed in the turbocharger 1 (more specifically, the thrust bearing portion 42 of the bearing housing 40), the thrust bearing 100 is interposed via the first collar 11 and the second collar 12. And is fitted onto the shaft 10.
  • the first collar 11 includes a cylindrical portion 11 a whose axial direction is directed in the front-rear direction, and an extending portion 11 b that extends outward from the front end portion of the cylindrical portion 11 a.
  • the second collar 12 includes a cylindrical portion 12a whose axial direction is directed in the front-rear direction, and an extending portion 12b that extends outward from the front end portion of the cylindrical portion 12a.
  • the first collar 11 and the second collar 12 are juxtaposed in the front-rear direction. More specifically, the first collar 11 and the second collar 12 are respectively fitted on the shaft 10 and arranged so that the front end portion of the first collar 11 and the rear end portion of the second collar 12 are in contact with each other.
  • the first collar 11 and the second collar 12 are fixed to the shaft 10 and configured to be rotatable integrally with the shaft 10.
  • the thrust bearing 100 when the thrust bearing 100 is disposed in the turbocharger 1 (more specifically, the thrust bearing portion 42 of the bearing housing 40), the thrust bearing 100 has the first collar 11 in the front-rear direction. And the second collar 12.
  • the cylindrical portion 12a of the second collar 12 is inserted into the insertion hole 123 of the thrust bearing 100 from the front.
  • a slight gap is formed between the inner peripheral surface of the insertion hole 123 of the thrust bearing 100 and the outer peripheral surface of the cylindrical portion 12 a of the second collar 12.
  • the second collar 12 fixed to the shaft 10 is in a state where a slight gap is formed between the cylindrical portion 12a and the insertion hole 123 of the thrust bearing 100. It will rotate with.
  • the thrust bearing 100 is disposed to face the first collar 11. More specifically, the thrust bearing 100 is disposed immediately in front of the extending portion 11 b of the first collar 11. In the thrust bearing 100, the sliding portion 120 faces the extending portion 11 b of the first collar 11 in the front-rear direction, and the rear side surface of the sliding portion 120 is substantially the same as the front side surface of the extending portion 11 b of the first collar 11. Abut.
  • the thrust bearing 100 is disposed to face the second collar 12. More specifically, the thrust bearing 100 is disposed immediately behind the extending portion 12 b of the second collar 12. In the thrust bearing 100, the sliding portion 120 faces the extending portion 12 b of the second collar 12 in the front-rear direction, and the front side surface of the sliding portion 120 is substantially the same as the rear side surface of the extending portion 12 b of the second collar 12. Abut.
  • the first collar 11 and the second collar 12 fixed to the shaft 10 have the extension portion 11b and the extension portion 12b of the front side surface of the sliding portion 120 of the thrust bearing 100 and It rotates (slids) in a state where it is substantially in contact with the rear side surface.
  • the front side surface and the rear side surface of the sliding portion 120 of the thrust bearing 100 are the sliding surfaces with the first collar 11 and the second collar 12.
  • Lubricating oil is supplied to the thrust bearing 100 through an oil supply passage 45 and a second oil supply passage 46 of the bearing housing 40.
  • the lubricating oil supplied to the thrust bearing 100 flows through the lubricating oil passage 130 and is supplied to the sliding surfaces of the sliding portion 120 with the first collar 11 and the second collar 12.
  • the lubricating oil from the oil supply passage 45 and the second oil supply passage 46 of the bearing housing 40 is first supplied to the oil supply portion 113 of the thrust bearing 100. Then, as shown in FIG. 11A, the lubricating oil supplied to the oil passage supply unit 113 is supplied to the first oil passage 114 through the first oil passage inlet 115. Then, the lubricating oil fed into the first oil passage 114 flows through the first oil passage 114 toward the downstream side.
  • circulated the 1st oil path 114 toward the downstream is discharged to the 2nd oil path 129 via the 1st oil path discharge port 116.
  • FIG. 11 (b) the lubricating oil which distribute
  • FIG. 11 (b) the lubricating oil which distribute
  • FIG.11 (b) the lubricating oil which distribute
  • FIG.11 (b) the lubricating oil which distribute
  • the first oil passage outlet 116 of the first oil passage 114 and the third oil passage inlet 127 of the third oil passage 126 are formed so as to face each other through the second oil passage 129. Therefore, a part of the lubricating oil discharged from the first oil passage discharge port 116 to the second oil passage 129 does not flow through the second oil passage 129 downward, but the third oil passage.
  • the oil is supplied to the third oil passage 126 through the supply inlet 127.
  • the lubricating oil filled in the second oil passage 129 is supplied to the third oil passage 126 through the third oil passage inlet 127.
  • the lubricating oil fed to the third oil passage 126 flows through the third oil passage 126 toward the downstream side.
  • the lubricating oil that has circulated through the third oil passage 126 toward the downstream side passes through the inner periphery of the insertion hole 123 of the sliding portion 120 via the third oil passage discharge port 128. Discharged to the surface.
  • the lubricating oil discharged to the inner peripheral surface of the insertion hole 123 fills a gap formed between the inner peripheral surface of the insertion hole 123 and the cylindrical portion 12 a of the second collar 12.
  • the lubricating oil fills the gap, and is approximately between the extended portion 11b of the first collar 11 and the extended portion 12b of the second collar 12, and the front side surface and the rear side surface of the sliding portion 120. It circulates through the contacted gap.
  • the lubricating oil supplied to the thrust bearing 100 flows through the lubricating oil passage 130, and the extending portion 11 b of the first collar 11, the extending portion 12 b of the second collar 12, and the sliding portion 120. It is supplied to the substantially abutted gap between the front side surface and the rear side surface, that is, the sliding surface of the sliding portion 120.
  • the lubricating oil supplied to the sliding surface of the sliding portion 120 is supplied to the tapered portion 124 of the sliding surface.
  • the first collar 11 and the second collar 12 fixed to the shaft 10 rotate relative to the thrust bearing 100, thereby causing the tapered portion 124 to move.
  • the pressure of the supplied lubricating oil increases.
  • the thrust bearing 100 can support a thrust load acting in the axial direction of the shaft 10, and can prevent seizure and abnormal wear (damage) on the sliding portion 120 (sliding surface).
  • the thrust bearing 100 is A thrust bearing disposed opposite to the thrust collars (first collar 11 and second collar 12) provided on the shaft 10, A first member (sliding portion 120) formed of a sliding material and sliding relative to the thrust collar (first collar 11 and second collar 12); A second member (main body portion 110) formed of a material different from the sliding material and fitted on the first member (sliding portion 120); It comprises.
  • the first member (sliding portion 120) having a sliding surface with the thrust collar (the first collar 11 and the second collar 12) is formed by the sliding member (copper-based material). Since the second member (main body 110) having a surface (which does not slide with the thrust collar) can be formed of a material (iron-based material) that is relatively cheaper than the sliding member, the manufacturing cost is relatively low. In addition, seizure, abnormal wear (damage), and the like on the sliding surface with the thrust collar (first collar 11 and second collar 12) can be sufficiently prevented.
  • the outer peripheral edge of the first member (sliding part 120) is provided with a groove part 125 whose central part in the width direction is recessed inward.
  • the turbocharger 1 has a configuration in which, in particular, the turbine 20 side tends to become hot due to exhaust from the cylinder of the engine, and as a result, the entire turbocharger 1 tends to become hot.
  • the sliding part 120 and the main body part 110 constituting the thrust bearing 100 are made of different materials, and the thermal expansion coefficients thereof are also different. More specifically, the sliding part 120 made of a copper-based material has a larger thermal expansion coefficient than the main body part 110 made of an iron-based material. Therefore, when the turbocharger 1 is heated to a high temperature, the sliding part 120 is more easily expanded and deformed than the main body part 110.
  • FIG. 13 shows a state in which the turbocharger 1 becomes hot and the sliding portion 120 is thermally expanded and deformed.
  • the alternate long and short dash line in FIG. 13 indicates the inner surface of the groove 125 (the rear side surface of the front extension portion 121 and the front side surface of the rear extension portion 122 before the sliding portion 120 is thermally expanded and deformed. ) Position.
  • the groove part 125 (more specifically, the front side extension part 121 and the rear side extension part 122) that is the narrowest part of the sliding part 120.
  • the first member (sliding portion 120) is made of a material having a larger thermal expansion coefficient than the second member (main body portion 110), for example, the first member (sliding portion) is configured as described above.
  • the portion 120) is thermally expanded, the groove portion 125 is deformed so that the inner diameter of the groove portion 125 is narrowed (in the width direction), and the influence on the second member (main body portion 110) can be reduced.
  • the groove portion 125 extends in the circumferential direction of the outer peripheral edge portion, and one end portion and the other end portion communicate with each other.
  • the groove 125 has an annular shape when viewed from the front. That is, the groove portion 125 makes one round of the outer peripheral edge portion of the first member (sliding portion 120) when the one side end portion and the other side end portion communicate with each other, and the sliding portion 120 is thermally expanded. Even if it is a case where it deform
  • Lubricating oil is supplied to the sliding surfaces (the front side surface and the rear side surface of the sliding portion 120) of the first member (sliding portion 120) with the thrust collar (first collar 11 and second collar 12).
  • the lubricating oil passage 130 includes a first member oil passage (second oil passage 129 and third oil passage 126) formed in the first member (sliding portion 120), In the first member oil passage, the groove part 125 (second oil passage 129) is used as a part of the first member oil passage.
  • FIG. 13 shows a state in which the second oil passage 129 is filled with lubricating oil.
  • the thrust bearing 100 when the lubricating oil filled in the second oil passage 129 is at a lower temperature than the thrust bearing 100, the thrust bearing 100 (particularly the sliding portion 120) is filled with the filled lubricating oil.
  • the thrust bearing 100 in particular, the sliding portion 120
  • the first member sliding portion 120
  • the groove portion 125 second oil passage 129
  • the lubricating oil passage 130 includes a second member oil passage (first oil passage 114) formed in the second member (main body portion 110).
  • a discharge port (first oil passage discharge port 116) of the second member oil passage (first oil passage 114) is formed so as to face the inside of the groove portion 125 (second oil passage 129).
  • the first member oil passage is provided with a communication passage (third oil passage 126) that communicates the groove portion 125 (second oil passage 129) and the insertion hole 123 inserted through the shaft 10.
  • FIG. 18 shows a configuration of a conventional thrust bearing 900.
  • the conventional thrust bearing 900 has a lubricating oil passage 910 formed therein.
  • the lubricating oil supply port 920 of the lubricating oil passage 910 is formed in the front upper part of the thrust bearing 900.
  • the lubricating oil outlet 930 of the lubricating oil passage 910 is formed in the rear part of the inner peripheral surface of the through hole 940 of the thrust bearing 900.
  • the lubricating oil passage 910 connecting the lubricating oil supply port 920 and the lubricating oil discharge port 930 is formed in an oblique direction slightly inclined with respect to the vertical direction (the plate surface direction of the thrust bearing 900).
  • the conventional thrust bearing 900 needs to form a relatively slender lubricating oil passage 910 in an oblique direction by drilling, which is difficult to process.
  • the thrust bearing 100 is configured such that the sliding portion 120 and the main body portion 110 are separately provided.
  • a groove portion 125 and a third oil passage 126 are formed in the sliding portion 120 as part of the lubricating oil passage 130, respectively.
  • a first oil passage 114 is formed in the main body 110 as a part of the lubricating oil passage 130.
  • the lubricating oil path 130 is formed by attaching the sliding part 120 to the main body part 110. Therefore, in order to form the lubricating oil passage 130, the thrust bearing 100 does not need to form one relatively elongated lubricating oil passage 910 in an oblique direction by drilling, unlike the conventional thrust bearing 900. That is, since the lubricating oil passage 130 of the thrust bearing 100 is formed by combining a relatively short length of oil passage (the first oil passage 114 and the third oil passage 126), the processing can be facilitated. .
  • the communication passage (third oil passage 126) of the first member oil passage is provided from the central portion in the width direction of the groove portion 125 in a direction perpendicular to the axial direction of the insertion hole 123.
  • the third oil passage 126 is provided in a direction perpendicular to the axial (front-rear) direction of the insertion hole 123, for example, the third oil passage 126 is inclined from the vertical direction with respect to the axial (front-rear) direction of the insertion hole 123 It can be formed more easily than when it is provided in the direction (oblique direction). Further, the third oil passage 126 may not be formed in the same straight line as the first oil passage 114 (specifically, the first oil passage outlet 116 of the first oil passage 114 and the third oil passage 114). Lubricating oil can be supplied to the sliding surface of the sliding portion 120 (even if the third oil passage inlet of the passage 126 is shifted in the front-rear direction in a side view).
  • the lubricating oil can be supplied to the sliding surface of the sliding part 120 without precisely aligning the sliding part 120 and the main body part 110. Therefore, it is not necessary to perform the alignment precisely, and the processing can be made easier.
  • the thrust bearing 100 is used for the turbocharger 1.
  • the turbocharger 1 can be manufactured at a relatively low cost, and seizure and abnormal wear on the sliding surface between the thrust bearing 100 and the thrust collar (first collar 11 and second collar 12). (Damage) can be sufficiently prevented.
  • the copper-based material in the present embodiment is an embodiment of the “sliding material” according to the present invention.
  • the “sliding material” according to the present invention is not limited to a copper-based material, and may be any material having relatively excellent seizure resistance and wear resistance.
  • the iron-based material according to the present embodiment is an embodiment of “a material different from the sliding material” according to the present invention.
  • the “material different from the sliding material” according to the present invention is not limited to an iron-based material, and is relatively inexpensive even if it does not have relatively excellent seizure resistance or wear resistance. A material is desirable.
  • the first color 11 and the second color 12 are an embodiment of the “thrust color” according to the present invention.
  • the configuration of the “thrust color” according to the present invention is not limited to the configuration of the first color 11 and the second color 12.
  • the “thrust color” according to the present invention may be composed of one color instead of two colors.
  • the sliding portion 120 is an embodiment of the “first member” according to the present invention.
  • the configuration of the “first member” according to the present invention is not limited to the configuration of the sliding portion 120.
  • the shape of the outer peripheral edge may be substantially rectangular in a front view.
  • the groove 125 is an embodiment of the “groove” according to the present invention.
  • the configuration of the “groove portion” according to the present invention is not limited to the configuration of the groove portion 125.
  • the “groove portion” according to the present invention may have a shape recessed in a substantially U shape in a cross-sectional view.
  • the main body 110 is an embodiment of the “second member” according to the present invention.
  • the configuration of the “second member” according to the present invention is not limited to the configuration of the main body 110.
  • the lubricating oil passage 130 is an embodiment of the “lubricating oil passage” according to the present invention.
  • the second oil passage 129 and the third oil passage 126 are an embodiment of the “first member oil passage” according to the present invention.
  • the third oil passage 126 is an embodiment of the “communication passage” according to the present invention.
  • the first oil passage 114 is an embodiment of the “second member oil passage” according to the present invention.
  • the third oil passage 126 is not formed at the upper portion of the groove portion 125 but at the lower portion of the groove portion 125. It is formed.
  • the lubricating oil supplied from the first oil passage 114 to the second oil passage 129 is divided into left and right parts from the upper part to the lower part of the second oil passage 129. After distribution, the oil is supplied to the third oil passage 126. Therefore, since the new lubricating oil supplied from the first oil path 114 always flows through the second oil path 129, the cooling effect by the lubricating oil can be further enhanced.
  • the thrust bearing 200 is configured such that the width W (front-rear direction) length W ⁇ b> 2 of the sliding portion 120 is longer than the width W (front-rear direction) length W ⁇ b> 1 of the main body 110. It may be formed.
  • the length of the sliding portion 120 in the width direction is the length of the main body portion 110 in the width direction.
  • the first collar 11 and the second collar 12 can be prevented from sliding with a portion other than the sliding surface of the sliding portion 120.
  • the second member oil passage (first oil passage 114) and the communication passage (third oil passage) of the first member oil passage. 126) is formed in the same straight line.
  • the first oil passage 114 and the third oil passage 126 are formed in the same straight line, so that the first oil passage outlet 116 and the third oil passage inlet 127 are arranged close to each other. That is, the first oil passage outlet 116 and the third oil passage inlet 127 face each other, and the third oil passage outlet 128 is disposed in the direction of discharge of the lubricating oil discharged from the first oil passage outlet 116. Therefore, the lubricating oil discharged to the second oil passage 129 via the first oil passage outlet 116 makes it easy to supply the lubricating oil to the third oil passage 126 via the third oil passage inlet 127. be able to.
  • the lubricating oil can be supplied to the insertion hole 123 inserted into the shaft 10 even at a relatively low pressure. That is, a hydraulic pump or the like (not shown) for supplying lubricating oil can be reduced in size.
  • the present invention can be used for a thrust bearing disposed to face a thrust collar provided on a shaft.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Supercharger (AREA)
  • Sliding-Contact Bearings (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Provided is a thrust bearing capable of achieving a relatively low manufacturing cost and sufficiently preventing seizure, abnormal wear (damage), and the like on a sliding surface with a thrust collar. A thrust bearing is disposed to face a thrust collar (a first collar (11) and a second collar (12)) provided in a shaft (10), and is provided with a first member (a sliding part (120)) that is formed from a sliding material and slides with respect to the thrust collar (the first collar (11) and the second collar (12)), and a second member (a main body part (110)) that is formed from a material different from the sliding material and fitted onto the first member (the sliding part (120)).

Description

スラスト軸受Thrust bearing
　本発明は、シャフトに設けられたスラストカラーに対向して配置されるスラスト軸受の技術に関する。 The present invention relates to a technology of a thrust bearing arranged to face a thrust collar provided on a shaft.
　従来、シャフトに設けられたスラストカラーに対向して配置されるスラスト軸受の技術は公知となっている。例えば、特許文献１に記載の如くである。 Conventionally, the technology of a thrust bearing disposed opposite to a thrust collar provided on a shaft has been publicly known. For example, as described in Patent Document 1.
　特許文献１に記載のスラスト軸受は、シャフトに設けられたスラストカラーに対向して配置される。そして、前記スラスト軸受は、スラストカラーに対して摺動し、シャフトの軸線方向に作用するスラスト荷重を支承可能に構成される。そして、前記スラスト軸受は、比較的優れた耐焼き付き性や耐摩耗性を有する摺動材料により形成され、スラストカラーとの摺動面における焼き付きや異常摩耗（損傷）等を防止することができる。 The thrust bearing described in Patent Document 1 is disposed to face a thrust collar provided on the shaft. The thrust bearing is configured to be able to support a thrust load that slides against the thrust collar and acts in the axial direction of the shaft. The thrust bearing is formed of a sliding material having relatively excellent seizure resistance and wear resistance, and can prevent seizure and abnormal wear (damage) on the sliding surface with the thrust collar.
　しかしながら、特許文献１に記載のスラスト軸受においては、スラストカラーとの摺動面とその他の（スラストカラーと摺動しない）面とが、同一の材料により形成されている。 However, in the thrust bearing described in Patent Document 1, the sliding surface with the thrust collar and the other surface (which does not slide with the thrust collar) are formed of the same material.
　したがって、前記スラスト軸受の全部を比較的優れた耐焼き付き性や耐摩耗性を有する摺動材料により形成した場合は、当該摺動材料が比較的高価であるため、製造コストが高くなるという問題があった。 Therefore, when the entire thrust bearing is formed of a sliding material having relatively excellent seizure resistance and wear resistance, the sliding material is relatively expensive, and thus there is a problem that the manufacturing cost is increased. there were.
　一方、前記スラスト軸受の全部を比較的安価な材料（例えば、鉄系材料）により形成した場合は、当該鉄系材料が前記摺動材料よりも耐焼き付き性や耐摩耗性に劣るため、摺動面における焼き付きや異常摩耗（損傷）等を充分に防止することができないという問題があった。 On the other hand, when the entire thrust bearing is formed of a relatively inexpensive material (for example, an iron-based material), the iron-based material is inferior in seizure resistance and wear resistance than the sliding material. There is a problem that seizure on the surface and abnormal wear (damage) cannot be sufficiently prevented.
特開２０１２－３１８１０号公報JP 2012-31810 A
　本発明は以上の如き状況に鑑みてなされたものであり、その解決しようとする課題は、製造コストを比較的安くすることができ、且つスラストカラーとの摺動面における焼き付きや異常摩耗（損傷）等を充分に防止することができるスラスト軸受を提供することである。 The present invention has been made in view of the above circumstances, and the problem to be solved is that the manufacturing cost can be made relatively low, and seizure and abnormal wear (damage on the sliding surface with the thrust collar) can be achieved. ) And the like can be sufficiently prevented.
　本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。 The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
　即ち、本発明のスラスト軸受は、シャフトに設けられたスラストカラーに対向して配置されるスラスト軸受であって、摺動材料により形成され、前記スラストカラーに対して摺動する第一部材と、前記摺動材料とは異なる材料により形成され、前記第一部材に外嵌される第二部材と、を具備するものである。 That is, the thrust bearing of the present invention is a thrust bearing disposed opposite to the thrust collar provided on the shaft, and is formed of a sliding material and slides with respect to the thrust collar; A second member formed of a material different from the sliding material and fitted on the first member.
　本発明のスラスト軸受においては、前記第一部材の外周縁部には、幅方向中央部が内側へ向けて凹んだ溝部が設けられるものである。 In the thrust bearing according to the present invention, the outer peripheral edge portion of the first member is provided with a groove portion in which the central portion in the width direction is recessed inward.
　本発明のスラスト軸受においては、前記溝部は、前記外周縁部の周方向に延出され、一側端部と他側端部とが連通するものである。 In the thrust bearing of the present invention, the groove portion extends in the circumferential direction of the outer peripheral edge portion, and the one end portion and the other end portion communicate with each other.
　本発明のスラスト軸受においては、前記第一部材の前記スラストカラーとの摺動面に潤滑油を供給するための潤滑油路を具備し、前記潤滑油路には、前記第一部材に形成される第一部材油路を含み、前記第一部材油路には、当該第一部材油路の一部として前記溝部が用いられるものである。 In the thrust bearing of the present invention, a lubricating oil passage for supplying lubricating oil to a sliding surface of the first member with the thrust collar is provided, and the lubricating oil passage is formed on the first member. The first member oil passage includes the first member oil passage, and the groove portion is used as a part of the first member oil passage.
　本発明のスラスト軸受においては、前記潤滑油路には、前記第二部材に形成される第二部材油路を含み、前記第二部材油路の吐出口は、前記溝部内を臨むように形成され、前記第一部材油路には、前記溝部と前記シャフトに挿通される挿通孔とを連通する連通路が設けられるものである。 In the thrust bearing of the present invention, the lubricating oil passage includes a second member oil passage formed in the second member, and a discharge port of the second member oil passage is formed so as to face the groove portion. The first member oil passage is provided with a communication passage that communicates the groove and the insertion hole inserted through the shaft.
　本発明のスラスト軸受においては、前記第一部材油路の連通路は、前記溝部の幅方向中央部から前記挿通孔の軸心方向に対して垂直方向に向けて設けられるものである。 In the thrust bearing according to the present invention, the communication passage of the first member oil passage is provided from the central portion in the width direction of the groove portion in a direction perpendicular to the axial direction of the insertion hole.
　本発明のスラスト軸受においては、前記スラスト軸受は、ターボチャージャに用いられるものである。 In the thrust bearing of the present invention, the thrust bearing is used for a turbocharger.
　本発明の効果として、以下に示すような効果を奏する。 As the effects of the present invention, the following effects are obtained.
　本発明のスラスト軸受においては、スラストカラーとの摺動面を有する第一部材を摺動部材により形成し、その他の（スラストカラーと摺動しない）面を有する第二部材を当該摺動部材よりも比較的安価な材料により形成することができるので、製造コストを比較的安くすることができ、且つ当該スラストカラーとの摺動面における焼き付きや異常摩耗（損傷）等を充分に防止することができる。 In the thrust bearing of the present invention, the first member having a sliding surface with the thrust collar is formed by the sliding member, and the second member having another surface (which does not slide with the thrust collar) is formed from the sliding member. Can be made of a relatively inexpensive material, so that the manufacturing cost can be made relatively low, and seizure or abnormal wear (damage) on the sliding surface with the thrust collar can be sufficiently prevented. it can.
　本発明のスラスト軸受においては、例えば第一部材が第二部材よりも熱膨張係数が大きい材料である場合に、当該第一部材が熱膨張すると溝部の内径が狭まるように（幅方向に）変形することになり、第二部材への影響を低減させることができる。 In the thrust bearing of the present invention, for example, when the first member is made of a material having a larger thermal expansion coefficient than that of the second member, the inner diameter of the groove portion is reduced (in the width direction) when the first member is thermally expanded. Therefore, the influence on the second member can be reduced.
　本発明のスラスト軸受においては、溝部は一側端部と他側端部とが連通することにより、当該第一部材の外周縁部を一周することになり、第二部材への影響をより低減させることができる。 In the thrust bearing of the present invention, the groove portion makes one round of the outer peripheral edge portion of the first member when the one side end portion and the other side end portion communicate with each other, thereby further reducing the influence on the second member. Can be made.
　本発明のスラスト軸受においては、溝部に潤滑油が流通することにより、第一部材を冷却することができる。 In the thrust bearing of the present invention, the first member can be cooled by the lubricating oil flowing through the groove.
　本発明のスラスト軸受においては、潤滑油路は、比較的短い長さの油路を組み合わせて形成されるので、当該潤滑油路全体として加工を容易とすることができる。 In the thrust bearing of the present invention, the lubricating oil passage is formed by combining oil passages having a relatively short length, so that the entire lubricating oil passage can be easily processed.
　本発明のスラスト軸受においては、より加工を容易とすることができる。 In the thrust bearing of the present invention, the processing can be made easier.
　本発明のスラスト軸受においては、ターボチャージャは、製造コストを比較的安くすることができ、且つスラスト軸受とスラストカラーとの摺動面における焼き付きや異常摩耗（損傷）等を充分に防止することができる。 In the thrust bearing of the present invention, the turbocharger can reduce the manufacturing cost relatively and can sufficiently prevent seizure and abnormal wear (damage) on the sliding surface between the thrust bearing and the thrust collar. it can.
本発明の第一実施形態に係るスラスト軸受を具備したターボチャージャの全体的な構成を示した側面断面図。1 is a side sectional view showing an overall configuration of a turbocharger including a thrust bearing according to a first embodiment of the present invention. 同じく、スラスト軸受の構成を示した分解斜視図。Similarly, the disassembled perspective view which showed the structure of the thrust bearing. （ａ）同じく、本体部の構成を示した正面図。（ｂ）同じく、図３（ａ）におけるＡ－Ａ線矢視断面図。(A) The front view which similarly showed the structure of the main-body part. FIG. 3B is a cross-sectional view taken along line AA in FIG. 同じく、摺動部の構成を示した正面図。Similarly, the front view which showed the structure of the sliding part. （ａ）同じく、図５（ａ）におけるＢ－Ｂ線矢視断面図。（ｂ）同じく、図５（ａ）におけるＣ－Ｃ線矢視断面図。(A) Similarly, a sectional view taken along line BB in FIG. 5 (a). FIG. 5B is a cross-sectional view taken along the line CC in FIG. 同じく、スラスト軸受の構成を示した正面図。Similarly, the front view which showed the structure of the thrust bearing. 同じく、スラスト軸受の構成を示した側面断面図。Similarly, the side sectional view showing the composition of the thrust bearing. （ａ）同じく、図６における一部拡大部。（ｂ）同じく、潤滑油路の構成を示した模式図。(A) Similarly, a partially enlarged portion in FIG. (B) The schematic diagram which showed the structure of the lubricating oil path similarly. 同じく、スラスト軸受の配置構成を示した分解斜視図。Similarly, the disassembled perspective view which showed the arrangement configuration of the thrust bearing. 同じく、スラスト軸受の配置構成を示した側面断面図。Similarly, the side sectional view showing the arrangement configuration of the thrust bearing. （ａ）同じく、潤滑油路への潤滑油の流通態様を示した模式図。（ｂ）同じく、潤滑油路への潤滑油の流通態様を示した模式図。(A) The schematic diagram which showed the distribution | circulation aspect of the lubricating oil to a lubricating oil path similarly. (B) The schematic diagram which showed the distribution | circulation aspect of the lubricating oil to a lubricating oil path similarly. （ａ）同じく、潤滑油路への潤滑油の流通態様を示した模式図。（ｂ）同じく、潤滑油路への潤滑油の流通態様を示した模式図。(A) The schematic diagram which showed the distribution | circulation aspect of the lubricating oil to a lubricating oil path similarly. (B) The schematic diagram which showed the distribution | circulation aspect of the lubricating oil to a lubricating oil path similarly. 同じく、第二油路の構成による作用について示した模式図。Similarly, the schematic diagram shown about the effect | action by the structure of a 2nd oil path. 本発明の第二実施形態に係るスラスト軸受の構成を示した側面断面図。Side surface sectional drawing which showed the structure of the thrust bearing which concerns on 2nd embodiment of this invention. （ａ）同じく、潤滑油路の構成を示した模式図。（ｂ）図１５（ａ）とは異なる潤滑油路の構成を示した模式図。(A) The schematic diagram which showed the structure of the lubricating oil path similarly. (B) The schematic diagram which showed the structure of the lubricating oil path different from Fig.15 (a). 同じく、図１４とは異なるスラスト軸受の構成を示した側面断面図。Similarly, the side sectional view showing the composition of the thrust bearing different from FIG. 本発明の第三実施形態に係るスラスト軸受の構成を示した側面断面図。Side surface sectional drawing which showed the structure of the thrust bearing which concerns on 3rd embodiment of this invention. 従来のスラスト軸受の構成を示した側面断面図。Side surface sectional drawing which showed the structure of the conventional thrust bearing.
　以下では、図中に示した矢印に従って、上下方向、左右方向、及び前後方向を定義する。 In the following, the vertical direction, the horizontal direction, and the front-back direction are defined according to the arrows shown in the figure.
　まず、図１を用いて、本発明の第一実施形態に係るスラスト軸受１００を具備するターボチャージャ１の構成について説明する。 First, the configuration of the turbocharger 1 including the thrust bearing 100 according to the first embodiment of the present invention will be described with reference to FIG.
　ターボチャージャ１は、エンジンのシリンダに圧縮空気を送り込むためのものである。図１に示すように、ターボチャージャ１は、主としてシャフト１０と、タービン２０と、コンプレッサ３０と、軸受ハウジング４０と、を具備する。 The turbocharger 1 is for sending compressed air into the engine cylinder. As shown in FIG. 1, the turbocharger 1 mainly includes a shaft 10, a turbine 20, a compressor 30, and a bearing housing 40.
　シャフト１０は、その長手方向（軸線方向）を前後方向へ向けて配置される。シャフト１０の一端（後端）にはコンプレッサホイール３２が固定され、シャフト１０の他端（前端）にはタービンホイール２２が固定される。このように、シャフト１０は、コンプレッサホイール３２とタービンホイール２２とを連結する。シャフト１０は、軸受ハウジング４０内に回動可能に支持される。 The shaft 10 is arranged with its longitudinal direction (axial direction) directed in the front-rear direction. The compressor wheel 32 is fixed to one end (rear end) of the shaft 10, and the turbine wheel 22 is fixed to the other end (front end) of the shaft 10. Thus, the shaft 10 connects the compressor wheel 32 and the turbine wheel 22. The shaft 10 is rotatably supported in the bearing housing 40.
　タービン２０は、軸受ハウジング４０の前方に配置される。タービン２０は、主としてタービンハウジング２１と、タービンホイール２２と、を具備する。 The turbine 20 is disposed in front of the bearing housing 40. The turbine 20 mainly includes a turbine housing 21 and a turbine wheel 22.
　タービンハウジング２１は、タービンホイール２２を内包するものである。タービンハウジング２１は、軸受ハウジング４０の前端に固定され、タービンホイール２２を覆うように形成される。タービンホイール２２は、シャフト１０に固定され、当該シャフト１０と一体的に回動可能に構成される。 The turbine housing 21 contains the turbine wheel 22. The turbine housing 21 is fixed to the front end of the bearing housing 40 and is formed so as to cover the turbine wheel 22. The turbine wheel 22 is fixed to the shaft 10 and is configured to be rotatable integrally with the shaft 10.
　コンプレッサ３０は、軸受ハウジング４０の後方に配置される。コンプレッサ３０は、主としてコンプレッサハウジング３１と、コンプレッサホイール３２と、を具備する。 The compressor 30 is disposed behind the bearing housing 40. The compressor 30 mainly includes a compressor housing 31 and a compressor wheel 32.
　コンプレッサハウジング３１は、コンプレッサホイール３２を内包するものである。コンプレッサハウジング３１は、軸受ハウジング４０の後端に固定され、コンプレッサホイール３２を覆うように形成される。コンプレッサホイール３２は、シャフト１０に固定され、当該シャフト１０と一体的に回動可能に構成される。 The compressor housing 31 contains the compressor wheel 32. The compressor housing 31 is fixed to the rear end of the bearing housing 40 and is formed so as to cover the compressor wheel 32. The compressor wheel 32 is fixed to the shaft 10 and is configured to be rotatable integrally with the shaft 10.
　軸受ハウジング４０は、シャフト１０を回動可能に支持するものである。軸受ハウジング４０には、主としてすべり軸受部４１と、スラスト軸受部４２と、給油油路４５と、が設けられる。 The bearing housing 40 supports the shaft 10 so as to be rotatable. The bearing housing 40 is mainly provided with a sliding bearing portion 41, a thrust bearing portion 42, and an oil supply oil passage 45.
　すべり軸受部４１は、シャフト１０を回動可能に支持する部分である。すべり軸受部４１は、円形断面を有し、軸受ハウジング４０を前後方向に貫通するように形成される。すべり軸受部４１には、シャフト１０を滑らかに回動させるためのすべり軸受４３が配置される。すべり軸受４３は、シャフト１０に外嵌される。 The sliding bearing portion 41 is a portion that supports the shaft 10 so as to be rotatable. The sliding bearing portion 41 has a circular cross section and is formed so as to penetrate the bearing housing 40 in the front-rear direction. The sliding bearing portion 41 is provided with a sliding bearing 43 for smoothly rotating the shaft 10. The slide bearing 43 is fitted on the shaft 10.
　スラスト軸受部４２は、シャフト１０の軸線方向に作用するスラスト荷重を支承するための部分である。スラスト軸受部４２は、軸受ハウジング４０の後側面に形成される。より詳細には、軸受ハウジング４０の後側面には、前方へ向けて凹んだ凹部が形成される。そして、当該凹部により形成された空間が、スラスト軸受部４２となる。スラスト軸受部４２には、スラスト荷重を支承するためのスラスト軸受１００が配置される。
　なお、スラスト軸受１００の構成については、後述する。 The thrust bearing portion 42 is a portion for supporting a thrust load that acts in the axial direction of the shaft 10. The thrust bearing portion 42 is formed on the rear side surface of the bearing housing 40. More specifically, a recess recessed toward the front is formed on the rear side surface of the bearing housing 40. The space formed by the concave portion becomes the thrust bearing portion 42. A thrust bearing 100 for supporting a thrust load is disposed in the thrust bearing portion 42.
The configuration of the thrust bearing 100 will be described later.
　図１に示すように、給油油路４５は、すべり軸受４３及びスラスト軸受１００に潤滑油を供給（給油）するための孔である。給油油路４５は、軸受ハウジング４０の上側面に設けられたハウジング給油口４８から下方へ向けて延出される。そして、当該延出端部（下側端部）が、すべり軸受部４１に設けられた第一ハウジング吐出口４９に接続される。こうして、ハウジング給油口４８と第一ハウジング吐出口４９とが連通され、すべり軸受部４１（ひいては、すべり軸受４３）に潤滑油を供給することができる。 As shown in FIG. 1, the oil supply oil passage 45 is a hole for supplying (oil supply) lubricating oil to the slide bearing 43 and the thrust bearing 100. The oil supply passage 45 extends downward from a housing oil supply port 48 provided on the upper side surface of the bearing housing 40. The extension end portion (lower end portion) is connected to a first housing discharge port 49 provided in the sliding bearing portion 41. Thus, the housing oil supply port 48 and the first housing discharge port 49 communicate with each other, and the lubricating oil can be supplied to the slide bearing portion 41 (and thus the slide bearing 43).
　また、給油油路４５の上下中途部には、当該給油油路４５が分岐した第二給油油路４６が形成される。第二給油油路４６は、給油油路４５との分岐部から後方へ向けて延出される。そして、当該延出端部（後側端部）が、スラスト軸受部４２に設けられた第二ハウジング吐出口５０に接続される。こうして、ハウジング給油口４８と第二ハウジング吐出口５０とが連通され、スラスト軸受部４２（ひいては、スラスト軸受１００）に潤滑油を供給することができる。 Also, a second oil supply passage 46 in which the oil supply oil passage 45 is branched is formed in the middle of the oil supply oil passage 45 in the vertical direction. The second oil supply passage 46 extends rearward from a branch portion with the oil supply passage 45. The extension end portion (rear end portion) is connected to the second housing discharge port 50 provided in the thrust bearing portion 42. Thus, the housing oil supply port 48 and the second housing discharge port 50 communicate with each other, and the lubricating oil can be supplied to the thrust bearing portion 42 (and thus the thrust bearing 100).
　このように構成されたターボチャージャ１においては、エンジンのシリンダ内で燃焼した後の高温の空気（排気）によって、タービンホイール２２が回動される。そして、当該タービンホイール２２の回動は、シャフト１０を介してコンプレッサホイール３２に伝達され、当該コンプレッサホイール３２が回動される。そして、コンプレッサホイール３２が回動することにより、圧縮された空気を前記エンジンのシリンダへと供給することができる。 In the turbocharger 1 configured as described above, the turbine wheel 22 is rotated by high-temperature air (exhaust gas) after combustion in the cylinder of the engine. Then, the rotation of the turbine wheel 22 is transmitted to the compressor wheel 32 via the shaft 10, and the compressor wheel 32 is rotated. The compressed air can be supplied to the cylinder of the engine by rotating the compressor wheel 32.
　次に、スラスト軸受１００の構成について、より詳細に説明する。　 Next, the configuration of the thrust bearing 100 will be described in more detail. *
　図１及び図２に示すスラスト軸受１００は、シャフト１０の軸線方向（前後方向）に作用するスラスト荷重を支承するための部材である。図２に示すように、スラスト軸受１００は、主として本体部１１０と、摺動部１２０と、により構成される。また、スラスト軸受１００には、潤滑油を流通させるための潤滑油路１３０（図７等参照）が設けられる。　 A thrust bearing 100 shown in FIGS. 1 and 2 is a member for supporting a thrust load acting in the axial direction (front-rear direction) of the shaft 10. As shown in FIG. 2, the thrust bearing 100 is mainly composed of a main body portion 110 and a sliding portion 120. Further, the thrust bearing 100 is provided with a lubricating oil passage 130 (see FIG. 7 and the like) for circulating lubricating oil. *
　図２及び図３に示す本体部１１０は、スラスト軸受１００の主たる構造体である。本体部１１０は、比較的安価な材料である鉄系材料により構成される。本体部１１０は、平板状に形成され、その板面を前後方向へ向けて配置される。本体部１１０は、正面視で開口する側を下方へ向けた略Ｃ字状に形成される。より詳細には、本体部１１０は、正面視で略真円形状の部材が、当該本体部１１０の中央部を残して下方から上方へ向けて切り欠いた形状に形成される。 2 and 3 is a main structure of the thrust bearing 100. The main body 110 shown in FIGS. The main body 110 is made of a ferrous material that is a relatively inexpensive material. The main body 110 is formed in a flat plate shape and is arranged with its plate surface facing in the front-rear direction. The main body 110 is formed in a substantially C shape with the opening side facing downward when viewed from the front. More specifically, the main body 110 is formed in a shape in which a substantially circular member in front view is cut out from below to above while leaving the central portion of the main body 110.
　本体部１１０には、取付孔１１１と、ピン孔１１２と、油路給入部１１３と、第一油路１１４と、が設けられる。 The main body 110 is provided with an attachment hole 111, a pin hole 112, an oil passage feeding portion 113, and a first oil passage 114.
　図２及び図３に示す取付孔１１１は、後述する摺動部１２０を取り付けるための孔である。取付孔１１１は、本体部１１０の略中央に、正面視で略真円状に形成される。取付孔１１１は、本体部１１０を前後方向に貫通し、その軸心を前後方向へ向けて形成される。取付孔１１１の内径は、摺動部１２０の外径よりも若干短くなるように形成される。 2 and 3 is a hole for attaching a sliding portion 120 described later. The attachment hole 111 is formed in a substantially circular shape in a front view in the approximate center of the main body 110. The mounting hole 111 penetrates the main body 110 in the front-rear direction and is formed with its axis centered in the front-rear direction. The inner diameter of the mounting hole 111 is formed to be slightly shorter than the outer diameter of the sliding part 120.
　図２及び図３に示すピン孔１１２は、スラスト軸受１００の位置決めを行うための孔である。ピン孔１１２は、本体部１１０の左上部に、正面視で略真円状に形成される。ピン孔１１２は、本体部１１０を前後方向に貫通し、その軸心を前後方向へ向けて形成される。ピン孔１１２は、スラスト軸受１００が軸受ハウジング４０（より詳細には、スラスト軸受部４２）に配置された場合に、ピン（不図示）が挿通される。これにより、スラスト軸受１００の位置が決まり、当該スラスト軸受１００が回り止めされる。 The pin hole 112 shown in FIGS. 2 and 3 is a hole for positioning the thrust bearing 100. The pin hole 112 is formed in the upper left part of the main-body part 110 in a substantially perfect circle shape by front view. The pin hole 112 penetrates the main body part 110 in the front-rear direction and is formed with its axis oriented in the front-rear direction. The pin hole 112 is inserted with a pin (not shown) when the thrust bearing 100 is disposed in the bearing housing 40 (more specifically, the thrust bearing portion 42). As a result, the position of the thrust bearing 100 is determined, and the thrust bearing 100 is prevented from rotating.
　図２及び図３に示す油路給入部１１３は、潤滑油路１３０に潤滑油を供給するためのものである。油路給入部１１３は、本体部１１０の上部中央であって、取付孔１１１の上方に形成される。油路給入部１１３は、本体部１１０の前側面から後方へ向けて切り欠いて形成される。より詳細には、油路給入部１１３は、頂点を上方へ向けた略円錐形状の後側半分の形状に形成され、本体部１１０の前側面から前方を臨むように開口される。図１に示すように、油路給入部１１３は、第二給油油路４６の第二ハウジング吐出口５０に対向して配置され、当該第二ハウジング吐出口５０に接続される。これにより、軸受ハウジング４０（給油油路４５及び第二給油油路４６）からスラスト軸受１００（油路給入部１１３）に潤滑油が供給可能となる。 2 and 3 are for supplying lubricating oil to the lubricating oil passage 130. The oil passage feeding portion 113 is formed in the upper center of the main body portion 110 and above the attachment hole 111. The oil passage feeding portion 113 is formed by cutting away from the front side surface of the main body portion 110 toward the rear. More specifically, the oil passage feeding portion 113 is formed in the shape of the rear half of a substantially conical shape with the apex directed upward, and is opened so as to face the front from the front side surface of the main body portion 110. As shown in FIG. 1, the oil passage feeding portion 113 is disposed to face the second housing discharge port 50 of the second oil supply oil passage 46 and is connected to the second housing discharge port 50. As a result, the lubricating oil can be supplied from the bearing housing 40 (oil supply oil passage 45 and second oil supply oil passage 46) to the thrust bearing 100 (oil passage supply portion 113).
　図２及び図３に示す第一油路１１４は、潤滑油路１３０の一部であって、当該潤滑油路１３０の上流側を構成する油路である。第一油路１１４は、本体部１１０の内部に穿孔される。第一油路１１４は、油路給入部１１３の下側面に開口された第一油路給入口１１５から後下方へ向けて延出される。第一油路１１４の延出側端部（下流側端部）は、取付孔１１１の内周面の上側に開口された第一油路吐出口１１６に接続される。これにより、油路給入部１１３と取付孔１１１とが、第一油路１１４により連通される。すなわち、油路給入部１１３に供給された潤滑油が、第一油路１１４を流通して取付孔１１１に供給可能となる。 The first oil passage 114 shown in FIGS. 2 and 3 is a part of the lubricating oil passage 130 and is an oil passage constituting the upstream side of the lubricating oil passage 130. The first oil passage 114 is drilled in the main body 110. The first oil passage 114 extends rearward and downward from a first oil passage inlet 115 opened on the lower surface of the oil passage feeding portion 113. An extension side end portion (downstream side end portion) of the first oil passage 114 is connected to a first oil passage discharge port 116 opened above the inner peripheral surface of the attachment hole 111. Thereby, the oil passage feeding portion 113 and the mounting hole 111 are communicated with each other by the first oil passage 114. That is, the lubricating oil supplied to the oil passage feeding portion 113 can be supplied to the mounting hole 111 through the first oil passage 114.
　図２、図４及び図５に示す摺動部１２０は、後述する第一カラー１１及び第二カラー１２と摺動する（摺動面を有する）部材である。摺動部１２０は、（前記鉄系材料と比較して）比較的優れた耐焼き付き性や耐摩耗性を有する摺動材料により構成される。本実施形態では、摺動部１２０は、摺動材料としての銅系材料により構成される。摺動部１２０は、平板状に形成され、その板面を前後方向へ向けて配置される。摺動部１２０は、正面視で略円環状に形成される。摺動部１２０の外径は、本体部１１０の取付孔１１１の内径よりも若干長くなるように形成される。また、摺動部１２０の前後方向（幅方向）の長さは、本体部１１０の前後方向の長さと略同一か、又は若干長くなるように形成される。 2, 4, and 5 is a member that slides (has a sliding surface) with a first collar 11 and a second collar 12 described later. The sliding portion 120 is made of a sliding material having relatively excellent seizure resistance and wear resistance (compared to the iron-based material). In this embodiment, the sliding part 120 is comprised with the copper-type material as a sliding material. The sliding part 120 is formed in a flat plate shape and is arranged with its plate surface facing in the front-rear direction. The sliding part 120 is formed in a substantially annular shape when viewed from the front. The outer diameter of the sliding part 120 is formed to be slightly longer than the inner diameter of the mounting hole 111 of the main body part 110. Further, the length of the sliding part 120 in the front-rear direction (width direction) is formed to be substantially the same as or slightly longer than the length of the main body part 110 in the front-rear direction.
　摺動部１２０には、挿通孔１２３と、テーパ部１２４と、溝部１２５と、第三油路１２６と、が設けられる。 The sliding portion 120 is provided with an insertion hole 123, a taper portion 124, a groove portion 125, and a third oil passage 126.
　図２、図４及び図５に示す挿通孔１２３は、（後述する第二カラー１２を介して）シャフト１０を挿通させるための孔である。挿通孔１２３は、摺動部１２０の略中央に、正面視で略真円状に形成される。挿通孔１２３は、摺動部１２０を前後方向に貫通し、その軸心を前後方向へ向けて形成される。挿通孔１２３の内径は、後述する第二カラー１２の円筒部１２ａの外径よりも若干長くなるように形成される。こうして、スラスト軸受１００が軸受ハウジング４０に配置された場合に、挿通孔１２３と第二カラー１２の円筒部１２ａとの間に隙間が形成される（図１０参照）。 The insertion hole 123 shown in FIGS. 2, 4 and 5 is a hole through which the shaft 10 is inserted (via a second collar 12 described later). The insertion hole 123 is formed in a substantially circular shape when viewed from the front in the approximate center of the sliding portion 120. The insertion hole 123 penetrates the sliding part 120 in the front-rear direction and is formed with its axis centered in the front-rear direction. The inner diameter of the insertion hole 123 is formed to be slightly longer than the outer diameter of a cylindrical portion 12a of the second collar 12 described later. Thus, when the thrust bearing 100 is disposed in the bearing housing 40, a gap is formed between the insertion hole 123 and the cylindrical portion 12a of the second collar 12 (see FIG. 10).
　図２及び図４に示すテーパ部１２４は、シャフト１０の軸線方向に作用するスラスト荷重を支承するための部位である。テーパ部１２４は、摺動部１２０の前側面及び後側面にそれぞれ形成される。より詳細には、テーパ部１２４は、摺動部１２０の前側面及び後側面が、周方向へ向けて緩やかに傾斜した部位として形成される。テーパ部１２４は、摺動部１２０の前側面及び後側面に、周方向に適宜の間隔をあけて（テーパ部１２４よりも周方向に短く設定されたフラット部を挟んで）複数形成される。本実施形態では、テーパ部１２４は、摺動部１２０の前側面及び後側面に、それぞれ４つ（図中における色付きの部分）形成される。 2 and 4 are portions for supporting a thrust load acting in the axial direction of the shaft 10. The taper portion 124 is formed on each of the front side surface and the rear side surface of the sliding portion 120. More specifically, the tapered portion 124 is formed as a portion where the front side surface and the rear side surface of the sliding portion 120 are gently inclined in the circumferential direction. A plurality of tapered portions 124 are formed on the front side surface and the rear side surface of the sliding portion 120 with appropriate intervals in the circumferential direction (with a flat portion set shorter in the circumferential direction than the tapered portion 124). In the present embodiment, four tapered portions 124 (colored portions in the drawing) are formed on the front side surface and the rear side surface of the sliding portion 120, respectively.
　図２、図４及び図５に示す溝部１２５は、摺動部１２０の外周縁部に形成される。溝部１２５は、摺動部１２０の外周縁部の前後方向（幅方向）中央部が、周方向に亘って内側に向けて凹んで形成される。こうして、摺動部１２０の外周縁部の前部には、当該摺動部１２０の前側面が外径方向に延出して形成された前側延出部１２１が形成される。また、摺動部１２０の外周縁部の後部には、当該摺動部１２０の後側面が外径方向に延出して形成された後側延出部１２２が形成される。そして、前側延出部１２１と後側延出部１２２との間の隙間が、溝部１２５として形成される。溝部１２５は、摺動部１２０の外周縁部の周方向に延出され、一側端部と他側端部とが連通される。こうして、溝部１２５は、正面視で略円環状に形成される。 2, 4, and 5 are formed in the outer peripheral edge of the sliding portion 120. The groove part 125 is formed such that the center part in the front-rear direction (width direction) of the outer peripheral edge part of the sliding part 120 is recessed inward in the circumferential direction. In this way, a front extension portion 121 is formed at the front portion of the outer peripheral edge portion of the sliding portion 120. The front side extending portion 121 is formed by extending the front side surface of the sliding portion 120 in the outer diameter direction. In addition, a rear extension portion 122 is formed at the rear portion of the outer peripheral edge portion of the sliding portion 120. The rear side extension portion 122 is formed by extending the rear side surface of the sliding portion 120 in the outer diameter direction. A gap between the front extension 121 and the rear extension 122 is formed as a groove 125. The groove part 125 extends in the circumferential direction of the outer peripheral edge part of the sliding part 120, and the one side end part and the other side end part are communicated with each other. Thus, the groove 125 is formed in a substantially annular shape when viewed from the front.
　図４及び図５に示す第三油路１２６は、潤滑油路１３０の一部であって、当該潤滑油路１３０の下流側を構成する油路である。第三油路１２６は、摺動部１２０の内部に穿孔される。第三油路１２６は、溝部１２５の上部の底面に開口された第三油路給入口１２７から真下方へ向けて延出される。すなわち、第三油路１２６は、上下方向に延出して形成されるものであり、挿通孔１２３の軸心（前後）方向に対して垂直方向に向けて設けられる。なお、第三油路給入口１２７は、溝部１２５の上部の底面において、前後方向（幅方向）中央部に形成される。第三油路１２６の延出側端部（下流側端部）は、挿通孔１２３の内周面の上側に開口された第三油路吐出口１２８に接続される。これにより、溝部１２５と挿通孔１２３とが、第三油路１２６により連通される。すなわち、後述する溝部１２５に充填された潤滑油は、第三油路１２６を介して挿通孔１２３に供給可能となる。 4 and 5 is a part of the lubricating oil passage 130 and is an oil passage constituting the downstream side of the lubricating oil passage 130. The third oil passage 126 is perforated inside the sliding portion 120. The third oil passage 126 extends from the third oil passage inlet 127 opened on the bottom surface of the upper portion of the groove portion 125 toward right below. That is, the third oil passage 126 is formed to extend in the vertical direction, and is provided in a direction perpendicular to the axial center (front-rear) direction of the insertion hole 123. The third oil passage inlet 127 is formed at the center in the front-rear direction (width direction) on the bottom surface of the upper portion of the groove 125. The extension side end portion (downstream side end portion) of the third oil passage 126 is connected to a third oil passage discharge port 128 opened on the upper side of the inner peripheral surface of the insertion hole 123. Thereby, the groove part 125 and the insertion hole 123 are communicated with each other by the third oil passage 126. That is, the lubricating oil filled in the groove part 125 described later can be supplied to the insertion hole 123 via the third oil passage 126.
　以下では、摺動部１２０の本体部１１０への取り付けの構成について説明する。 Hereinafter, a configuration for attaching the sliding portion 120 to the main body 110 will be described.
　図２に示すように、摺動部１２０は、本体部１１０の取付孔１１１に取り付けられる。より詳細には、摺動部１２０は、本体部１１０の取付孔１１１に圧入されることにより、当該取付孔１１１に取り付けられる。前述したように、摺動部１２０の外径は、本体部１１０の取付孔１１１の内径よりも若干長く形成されている。すなわち、摺動部１２０の外径において前記若干長く形成された部分が、圧入の締め代として構成される。こうして、摺動部１２０が本体部１１０の取付孔１１１に圧入されると、摺動部１２０の外周面（より詳細には、前側延出部１２１及び後側延出部１２２の外周面）と本体部１１０の取付孔１１１の内周面とが略隙間無く密着することになる。 As shown in FIG. 2, the sliding part 120 is attached to the attachment hole 111 of the main body part 110. More specifically, the sliding portion 120 is attached to the attachment hole 111 by being press-fitted into the attachment hole 111 of the main body 110. As described above, the outer diameter of the sliding portion 120 is slightly longer than the inner diameter of the mounting hole 111 of the main body 110. That is, the portion formed slightly longer in the outer diameter of the sliding portion 120 is configured as a press-fit allowance. Thus, when the sliding part 120 is press-fitted into the mounting hole 111 of the main body part 110, the outer peripheral surface of the sliding part 120 (more specifically, the outer peripheral surfaces of the front extension part 121 and the rear extension part 122) The inner peripheral surface of the mounting hole 111 of the main body 110 is in close contact with the gap.
　こうして、図６及び図７に示すように、スラスト軸受１００は、摺動部１２０が本体部１１０に取り付けられると、前側面及び後側面が面一である略平板状に形成され、その板面を前後方向へ向けて配置される。 Thus, as shown in FIGS. 6 and 7, when the sliding portion 120 is attached to the main body 110, the thrust bearing 100 is formed in a substantially flat plate shape in which the front side surface and the rear side surface are flush with each other. Are arranged in the front-rear direction.
　なお、本実施形態では、摺動部１２０の本体部１１０への取り付けは圧入により行うものとしたが、これに限定するものではない。すなわち、摺動部１２０の本体部１１０への取り付けは、溶接等、他の方法により行われてもよい。 In the present embodiment, the sliding portion 120 is attached to the main body 110 by press-fitting, but the present invention is not limited to this. That is, attachment of the sliding part 120 to the main body part 110 may be performed by other methods such as welding.
　以下では、前述したように摺動部１２０が本体部１１０へ取り付けられた状態における溝部１２５の構成について、図７及び図８を用いて説明する。 Hereinafter, the configuration of the groove part 125 in a state where the sliding part 120 is attached to the main body part 110 as described above will be described with reference to FIGS. 7 and 8.
　前述したように摺動部１２０が本体部１１０に取り付けられた場合、当該摺動部１２０の溝部１２５の開口部（すなわち、前側延出部１２１と後側延出部１２２との間の隙間）は、当該本体部１１０の取付孔１１１の内周面により閉塞される。すなわち、図７に示すように、溝部１２５は、側面断面視で略四角形状の密閉された空間として区画されることになる。なお、当該空間には、後述するように潤滑油が充填される。以下では、前記空間（溝部１２５及び取付孔１１１の内周面により区画された空間）を「第二油路１２９」と称する。 As described above, when the sliding part 120 is attached to the main body part 110, the opening part of the groove part 125 of the sliding part 120 (that is, the gap between the front extension part 121 and the rear extension part 122). Is closed by the inner peripheral surface of the mounting hole 111 of the main body 110. That is, as shown in FIG. 7, the groove part 125 is partitioned as a substantially square-shaped sealed space in a side sectional view. The space is filled with lubricating oil as will be described later. Hereinafter, the space (a space defined by the groove 125 and the inner peripheral surface of the mounting hole 111) is referred to as a “second oil passage 129”.
　このように、第二油路１２９は、溝部１２５及び取付孔１１１の内周面により区画された空間である。すなわち、第二油路１２９は、溝部１２５と同様に、摺動部１２０の外周縁部の周方向に延出され、一側端部と他側端部とが連通される。こうして、図８（ｂ）に示すように、第二油路１２９は、正面視で略円環状に形成される。なお、摺動部１２０の外周面（より詳細には、前側延出部１２１及び後側延出部１２２の外周面）と本体部１１０の取付孔１１１の内周面とは略隙間無く密着（当接）されるので、第二油路１２９に潤滑油が充填された場合に、当該充填された潤滑油が漏れないように構成される。 Thus, the second oil passage 129 is a space defined by the groove portion 125 and the inner peripheral surface of the mounting hole 111. That is, the second oil passage 129 extends in the circumferential direction of the outer peripheral edge portion of the sliding portion 120 similarly to the groove portion 125, and the one end portion and the other end portion are communicated. Thus, as shown in FIG. 8B, the second oil passage 129 is formed in a substantially annular shape in front view. Note that the outer peripheral surface of the sliding portion 120 (more specifically, the outer peripheral surfaces of the front extension portion 121 and the rear extension portion 122) and the inner peripheral surface of the mounting hole 111 of the main body portion 110 are in close contact with each other with almost no gap ( Therefore, when the second oil passage 129 is filled with lubricating oil, the filled lubricating oil is configured not to leak.
　以下では、前述したように摺動部１２０が本体部１１０へ取り付けられた状態における潤滑油路１３０の構成について、図７及び図８を用いて説明する。 Hereinafter, the configuration of the lubricating oil passage 130 in a state in which the sliding portion 120 is attached to the main body portion 110 as described above will be described with reference to FIGS. 7 and 8.
　図７及び図８に示す潤滑油路１３０は、潤滑油を流通させるための油路である。より詳細には、潤滑油路１３０は、軸受ハウジング４０の給油油路４５及び第二給油油路４６により油路給入部１１３に供給された潤滑油を、摺動部１２０（より詳細には、第一カラー１１及び第二カラー１２との摺動面）に供給するための油路である。潤滑油路１３０は、本体部１１０に設けられた前記第一油路１１４と、摺動部１２０の溝部１２５と本体部１１０の取付孔１１１の内周面とにより区画された前記第二油路１２９と、摺動部１２０に設けられた前記第三油路１２６と、により構成される。 7 and 8 is an oil passage for circulating the lubricating oil. More specifically, the lubricating oil passage 130 is formed by the sliding portion 120 (more specifically, the lubricating oil supplied to the oil passage feeding portion 113 by the oil supply oil passage 45 and the second oil supply oil passage 46 of the bearing housing 40). This is an oil passage for supplying to the sliding surfaces of the first collar 11 and the second collar 12. The lubricating oil passage 130 is the second oil passage defined by the first oil passage 114 provided in the main body portion 110, the groove portion 125 of the sliding portion 120, and the inner peripheral surface of the mounting hole 111 of the main body portion 110. 129 and the third oil passage 126 provided in the sliding portion 120.
　図７及び図８に示すように、第一油路１１４は、側面視で斜めに傾いた直線状に形成される。そして、第一油路１１４の第一油路吐出口１１６は、第二油路１２９（すなわち、摺動部１２０の溝部１２５）内を臨むように形成される。また、第三油路１２６は、側面視で上下方向に延出された直線状に形成される。そして、第三油路１２６の第三油路給入口１２７は、第一油路１１４の第一油路吐出口１１６の真下方よりも若干前方に配置され、第二油路１２９内を臨むように形成される。すなわち、第一油路１１４の第一油路吐出口１１６と第三油路１２６の第三油路給入口とは、側面視で前後方向にずれて配置されるとともに、第二油路１２９を介して概ね対向するように形成される。 As shown in FIGS. 7 and 8, the first oil passage 114 is formed in a linear shape inclined obliquely in a side view. The first oil passage outlet 116 of the first oil passage 114 is formed so as to face the second oil passage 129 (that is, the groove portion 125 of the sliding portion 120). The third oil passage 126 is formed in a straight line extending in the up-down direction in a side view. The third oil passage inlet 127 of the third oil passage 126 is disposed slightly forward from directly below the first oil passage outlet 116 of the first oil passage 114 and faces the second oil passage 129. Formed. That is, the first oil passage outlet 116 of the first oil passage 114 and the third oil passage inlet of the third oil passage 126 are arranged to be shifted in the front-rear direction in a side view, and the second oil passage 129 Are formed so as to face each other.
　こうして、図８（ｂ）に示すように、潤滑油路１３０は、全体として、第一油路１１４及び第三油路１２６により形成された概ね上下方向に延出した細長い油路に対して、略円環状に形成された油路（第二油路１２９）の上部中央が交わるように形成される。 Thus, as shown in FIG. 8 (b), the lubricating oil passage 130 as a whole, with respect to the elongated oil passage extending in the generally vertical direction formed by the first oil passage 114 and the third oil passage 126, It is formed so that the upper center of the oil passage (second oil passage 129) formed in a substantially annular shape intersects.
　以下では、スラスト軸受１００がターボチャージャ１に配置される場合の配置構成について、図９及び図１０を用いて説明する。 Hereinafter, an arrangement configuration when the thrust bearing 100 is arranged in the turbocharger 1 will be described with reference to FIGS. 9 and 10.
　図９及び図１０に示すように、スラスト軸受１００は、ターボチャージャ１（より詳細には、軸受ハウジング４０のスラスト軸受部４２）に配置された場合、第一カラー１１及び第二カラー１２を介してシャフト１０に外嵌される。 As shown in FIGS. 9 and 10, when the thrust bearing 100 is disposed in the turbocharger 1 (more specifically, the thrust bearing portion 42 of the bearing housing 40), the thrust bearing 100 is interposed via the first collar 11 and the second collar 12. And is fitted onto the shaft 10.
　まず、第一カラー１１及び第二カラー１２の構成について説明する。 First, the configuration of the first color 11 and the second color 12 will be described.
　図９及び図１０に示すように、第一カラー１１は、その軸線方向を前後方向へ向けた円筒部１１ａと、当該円筒部１１ａの前端部から外方へ向けて延出した延出部１１ｂと、により構成される。また、第二カラー１２は、その軸線方向を前後方向へ向けた円筒部１２ａと、当該円筒部１２ａの前端部から外方へ向けて延出した延出部１２ｂと、により構成される。 As shown in FIGS. 9 and 10, the first collar 11 includes a cylindrical portion 11 a whose axial direction is directed in the front-rear direction, and an extending portion 11 b that extends outward from the front end portion of the cylindrical portion 11 a. And composed of The second collar 12 includes a cylindrical portion 12a whose axial direction is directed in the front-rear direction, and an extending portion 12b that extends outward from the front end portion of the cylindrical portion 12a.
　第一カラー１１及び第二カラー１２は、前後方向に並設される。より詳細には、第一カラー１１及び第二カラー１２はそれぞれシャフト１０に外嵌され、第一カラー１１の前端部と第二カラー１２の後端部とが当接するように配置される。第一カラー１１及び第二カラー１２は、シャフト１０に固定され、当該シャフト１０と一体的に回動可能に構成される。 The first collar 11 and the second collar 12 are juxtaposed in the front-rear direction. More specifically, the first collar 11 and the second collar 12 are respectively fitted on the shaft 10 and arranged so that the front end portion of the first collar 11 and the rear end portion of the second collar 12 are in contact with each other. The first collar 11 and the second collar 12 are fixed to the shaft 10 and configured to be rotatable integrally with the shaft 10.
　次に、スラスト軸受１００と、第一カラー１１及び第二カラー１２との配置構成について説明する。 Next, the arrangement configuration of the thrust bearing 100 and the first collar 11 and the second collar 12 will be described.
　図９及び図１０に示すように、スラスト軸受１００がターボチャージャ１（より詳細には、軸受ハウジング４０のスラスト軸受部４２）に配置された場合、スラスト軸受１００は、前後方向において第一カラー１１と第二カラー１２との間に介挿される。そして、スラスト軸受１００の挿通孔１２３には、第二カラー１２の円筒部１２ａが前方から挿通される。なお、スラスト軸受１００の挿通孔１２３の内周面と、第二カラー１２の円筒部１２ａの外周面との間には、若干の隙間が形成される。 As shown in FIGS. 9 and 10, when the thrust bearing 100 is disposed in the turbocharger 1 (more specifically, the thrust bearing portion 42 of the bearing housing 40), the thrust bearing 100 has the first collar 11 in the front-rear direction. And the second collar 12. The cylindrical portion 12a of the second collar 12 is inserted into the insertion hole 123 of the thrust bearing 100 from the front. A slight gap is formed between the inner peripheral surface of the insertion hole 123 of the thrust bearing 100 and the outer peripheral surface of the cylindrical portion 12 a of the second collar 12.
　こうして、シャフト１０が回動すると、当該シャフト１０に固定された第二カラー１２は、円筒部１２ａとスラスト軸受１００の挿通孔１２３との間に若干の隙間が形成された状態で、当該シャフト１０と共に回動することになる。 Thus, when the shaft 10 rotates, the second collar 12 fixed to the shaft 10 is in a state where a slight gap is formed between the cylindrical portion 12a and the insertion hole 123 of the thrust bearing 100. It will rotate with.
　また、スラスト軸受１００は、第一カラー１１と対向して配置される。より詳細には、スラスト軸受１００は、第一カラー１１の延出部１１ｂの直ぐ前方に配置される。そして、スラスト軸受１００は、摺動部１２０が第一カラー１１の延出部１１ｂと前後方向に対向し、摺動部１２０の後側面が第一カラー１１の延出部１１ｂの前側面と略当接する。 Further, the thrust bearing 100 is disposed to face the first collar 11. More specifically, the thrust bearing 100 is disposed immediately in front of the extending portion 11 b of the first collar 11. In the thrust bearing 100, the sliding portion 120 faces the extending portion 11 b of the first collar 11 in the front-rear direction, and the rear side surface of the sliding portion 120 is substantially the same as the front side surface of the extending portion 11 b of the first collar 11. Abut.
　また、スラスト軸受１００は、第二カラー１２と対向して配置される。より詳細には、スラスト軸受１００は、第二カラー１２の延出部１２ｂの直ぐ後方に配置される。そして、スラスト軸受１００は、摺動部１２０が第二カラー１２の延出部１２ｂと前後方向に対向し、摺動部１２０の前側面が第二カラー１２の延出部１２ｂの後側面と略当接する。 Further, the thrust bearing 100 is disposed to face the second collar 12. More specifically, the thrust bearing 100 is disposed immediately behind the extending portion 12 b of the second collar 12. In the thrust bearing 100, the sliding portion 120 faces the extending portion 12 b of the second collar 12 in the front-rear direction, and the front side surface of the sliding portion 120 is substantially the same as the rear side surface of the extending portion 12 b of the second collar 12. Abut.
　こうして、シャフト１０が回動すると、当該シャフト１０に固定された第一カラー１１及び第二カラー１２は、その延出部１１ｂ及び延出部１２ｂがスラスト軸受１００の摺動部１２０の前側面及び後側面と略当接した状態で回動（摺動）することになる。このように、スラスト軸受１００の摺動部１２０の前側面及び後側面は、第一カラー１１及び第二カラー１２との摺動面となる。 Thus, when the shaft 10 is rotated, the first collar 11 and the second collar 12 fixed to the shaft 10 have the extension portion 11b and the extension portion 12b of the front side surface of the sliding portion 120 of the thrust bearing 100 and It rotates (slids) in a state where it is substantially in contact with the rear side surface. As described above, the front side surface and the rear side surface of the sliding portion 120 of the thrust bearing 100 are the sliding surfaces with the first collar 11 and the second collar 12.
　以下では、スラスト軸受１００に供給された潤滑油の流通態様について、図１１及び図１２を用いて説明する。 Hereinafter, the distribution mode of the lubricating oil supplied to the thrust bearing 100 will be described with reference to FIGS. 11 and 12.
　スラスト軸受１００には、軸受ハウジング４０の給油油路４５及び第二給油油路４６により潤滑油が供給される。そして、スラスト軸受１００に供給された潤滑油は、潤滑油路１３０を流通して、摺動部１２０の第一カラー１１及び第二カラー１２との摺動面に供給される。 Lubricating oil is supplied to the thrust bearing 100 through an oil supply passage 45 and a second oil supply passage 46 of the bearing housing 40. The lubricating oil supplied to the thrust bearing 100 flows through the lubricating oil passage 130 and is supplied to the sliding surfaces of the sliding portion 120 with the first collar 11 and the second collar 12.
　より詳細には、軸受ハウジング４０の給油油路４５及び第二給油油路４６からの潤滑油は、まずスラスト軸受１００の油路給入部１１３に供給される。そして、図１１（ａ）に示すように、油路給入部１１３に供給された潤滑油は、第一油路給入口１１５を介して第一油路１１４に給入される。そして、第一油路１１４に給入された潤滑油は、当該第一油路１１４を下流側へ向けて流通する。 More specifically, the lubricating oil from the oil supply passage 45 and the second oil supply passage 46 of the bearing housing 40 is first supplied to the oil supply portion 113 of the thrust bearing 100. Then, as shown in FIG. 11A, the lubricating oil supplied to the oil passage supply unit 113 is supplied to the first oil passage 114 through the first oil passage inlet 115. Then, the lubricating oil fed into the first oil passage 114 flows through the first oil passage 114 toward the downstream side.
　そして、図１１（ｂ）に示すように、第一油路１１４を下流側へ向けて流通した潤滑油は、第一油路吐出口１１６を介して第二油路１２９に吐出される。第二油路１２９に吐出された潤滑油は、当該第二油路１２９が充填されるまで、当該第二油路１２９に滞留する。すなわち、第二油路１２９に吐出された潤滑油は、当該第二油路１２９を下部へ向けて流通する。そして、下部へ向けて流通した潤滑油が当該第二油路１２９の下部から徐々に滞留し、第二油路１２９が潤滑油により充填されることになる。 And as shown in FIG.11 (b), the lubricating oil which distribute | circulated the 1st oil path 114 toward the downstream is discharged to the 2nd oil path 129 via the 1st oil path discharge port 116. FIG. The lubricating oil discharged to the second oil passage 129 stays in the second oil passage 129 until the second oil passage 129 is filled. That is, the lubricating oil discharged to the second oil passage 129 flows through the second oil passage 129 downward. Then, the lubricating oil circulated toward the lower portion gradually accumulates from the lower portion of the second oil passage 129, and the second oil passage 129 is filled with the lubricating oil.
　なお、前述したように、第一油路１１４の第一油路吐出口１１６と第三油路１２６の第三油路給入口１２７とは第二油路１２９を介して概ね対向するように形成されているため、第一油路吐出口１１６から第二油路１２９に吐出された潤滑油の一部は、当該第二油路１２９を下部へ向けて流通するのではなく、第三油路給入口１２７を介して第三油路１２６に給入される。 As described above, the first oil passage outlet 116 of the first oil passage 114 and the third oil passage inlet 127 of the third oil passage 126 are formed so as to face each other through the second oil passage 129. Therefore, a part of the lubricating oil discharged from the first oil passage discharge port 116 to the second oil passage 129 does not flow through the second oil passage 129 downward, but the third oil passage. The oil is supplied to the third oil passage 126 through the supply inlet 127.
　そして、図１２（ａ）に示すように、第二油路１２９に充填された潤滑油は、第三油路給入口１２７を介して第三油路１２６に給入される。そして、第三油路１２６に給入された潤滑油は、当該第三油路１２６を下流側へ向けて流通する。 Then, as shown in FIG. 12A, the lubricating oil filled in the second oil passage 129 is supplied to the third oil passage 126 through the third oil passage inlet 127. The lubricating oil fed to the third oil passage 126 flows through the third oil passage 126 toward the downstream side.
　そして、図１２（ｂ）に示すように、第三油路１２６を下流側へ向けて流通した潤滑油は、第三油路吐出口１２８を介して摺動部１２０の挿通孔１２３の内周面に吐出される。挿通孔１２３の内周面に吐出された潤滑油は、当該挿通孔１２３の内周面と第二カラー１２の円筒部１２ａとの間に形成された隙間を充填する。そして、潤滑油は、当該隙間を充填すると共に、第一カラー１１の延出部１１ｂ及び第二カラー１２の延出部１２ｂと、摺動部１２０の前側面及び後側面との間の略当接された隙間を流通する。 Then, as shown in FIG. 12 (b), the lubricating oil that has circulated through the third oil passage 126 toward the downstream side passes through the inner periphery of the insertion hole 123 of the sliding portion 120 via the third oil passage discharge port 128. Discharged to the surface. The lubricating oil discharged to the inner peripheral surface of the insertion hole 123 fills a gap formed between the inner peripheral surface of the insertion hole 123 and the cylindrical portion 12 a of the second collar 12. Then, the lubricating oil fills the gap, and is approximately between the extended portion 11b of the first collar 11 and the extended portion 12b of the second collar 12, and the front side surface and the rear side surface of the sliding portion 120. It circulates through the contacted gap.
　このように、スラスト軸受１００に供給された潤滑油は、潤滑油路１３０を流通して、第一カラー１１の延出部１１ｂ及び第二カラー１２の延出部１２ｂと、摺動部１２０の前側面及び後側面との間の略当接された隙間、すなわち摺動部１２０の摺動面に供給されることになる。 In this way, the lubricating oil supplied to the thrust bearing 100 flows through the lubricating oil passage 130, and the extending portion 11 b of the first collar 11, the extending portion 12 b of the second collar 12, and the sliding portion 120. It is supplied to the substantially abutted gap between the front side surface and the rear side surface, that is, the sliding surface of the sliding portion 120.
　なお、摺動部１２０の摺動面に供給された潤滑油は、当該摺動面のテーパ部１２４に供給される。そして、テーパ部１２４に潤滑油が供給されると、シャフト１０に固定された第一カラー１１及び第二カラー１２がスラスト軸受１００に対して相対的に回動することにより、当該テーパ部１２４に供給された潤滑油の圧力が高くなる。そして、シャフト１０の軸線方向に作用するスラスト荷重が生じたとしても、当該スラスト荷重を抑制する方向へ向けての圧力が生じることになる。その結果、スラスト軸受１００は、シャフト１０の軸線方向に作用するスラスト荷重を支承することができ、摺動部１２０（摺動面）における焼き付きや異常摩耗（損傷）等を防止することができる。 Note that the lubricating oil supplied to the sliding surface of the sliding portion 120 is supplied to the tapered portion 124 of the sliding surface. When the lubricating oil is supplied to the tapered portion 124, the first collar 11 and the second collar 12 fixed to the shaft 10 rotate relative to the thrust bearing 100, thereby causing the tapered portion 124 to move. The pressure of the supplied lubricating oil increases. And even if the thrust load which acts on the axial direction of the shaft 10 arises, the pressure toward the direction which suppresses the said thrust load will arise. As a result, the thrust bearing 100 can support a thrust load acting in the axial direction of the shaft 10, and can prevent seizure and abnormal wear (damage) on the sliding portion 120 (sliding surface).
　以上のように、本発明の第一実施形態に係るスラスト軸受１００は、
　シャフト１０に設けられたスラストカラー（第一カラー１１及び第二カラー１２）に対向して配置されるスラスト軸受であって、
　摺動材料により形成され、前記スラストカラー（第一カラー１１及び第二カラー１２）に対して摺動する第一部材（摺動部１２０）と、
　前記摺動材料とは異なる材料により形成され、前記第一部材（摺動部１２０）に外嵌される第二部材（本体部１１０）と、
　を具備するものである。 As described above, the thrust bearing 100 according to the first embodiment of the present invention is
A thrust bearing disposed opposite to the thrust collars (first collar 11 and second collar 12) provided on the shaft 10,
A first member (sliding portion 120) formed of a sliding material and sliding relative to the thrust collar (first collar 11 and second collar 12);
A second member (main body portion 110) formed of a material different from the sliding material and fitted on the first member (sliding portion 120);
It comprises.
　このような構成により、スラストカラー（第一カラー１１及び第二カラー１２）との摺動面を有する第一部材（摺動部１２０）を摺動部材（銅系材料）により形成し、その他の（スラストカラーと摺動しない）面を有する第二部材（本体部１１０）を当該摺動部材よりも比較的安価な材料（鉄系材料）により形成することができるので、製造コストを比較的安くすることができ、且つ当該スラストカラー（第一カラー１１及び第二カラー１２）との摺動面における焼き付きや異常摩耗（損傷）等を充分に防止することができる。 With such a configuration, the first member (sliding portion 120) having a sliding surface with the thrust collar (the first collar 11 and the second collar 12) is formed by the sliding member (copper-based material). Since the second member (main body 110) having a surface (which does not slide with the thrust collar) can be formed of a material (iron-based material) that is relatively cheaper than the sliding member, the manufacturing cost is relatively low. In addition, seizure, abnormal wear (damage), and the like on the sliding surface with the thrust collar (first collar 11 and second collar 12) can be sufficiently prevented.
　また、スラスト軸受１００においては、
　前記第一部材（摺動部１２０）の外周縁部には、幅方向中央部が内側へ向けて凹んだ溝部１２５が設けられるものである。 In the thrust bearing 100,
The outer peripheral edge of the first member (sliding part 120) is provided with a groove part 125 whose central part in the width direction is recessed inward.
　ここで、ターボチャージャ１は、特にタービン２０側がエンジンのシリンダからの排気により高温となり易く、ひいては当該ターボチャージャ１全体が高温となり易い構成となっている。 Here, the turbocharger 1 has a configuration in which, in particular, the turbine 20 side tends to become hot due to exhaust from the cylinder of the engine, and as a result, the entire turbocharger 1 tends to become hot.
　本実施形態において、スラスト軸受１００を構成する摺動部１２０及び本体部１１０は異なる材料により構成され、それぞれの熱膨張係数も異なっている。より詳細には、銅系材料により構成される摺動部１２０は、鉄系材料により構成される本体部１１０よりも熱膨張係数が大きい。したがって、ターボチャージャ１が高温となると、摺動部１２０は本体部１１０よりも熱膨張して変形し易い構成となっている。 In the present embodiment, the sliding part 120 and the main body part 110 constituting the thrust bearing 100 are made of different materials, and the thermal expansion coefficients thereof are also different. More specifically, the sliding part 120 made of a copper-based material has a larger thermal expansion coefficient than the main body part 110 made of an iron-based material. Therefore, when the turbocharger 1 is heated to a high temperature, the sliding part 120 is more easily expanded and deformed than the main body part 110.
　ここで、図１３は、ターボチャージャ１が高温となり、摺動部１２０が熱膨張して変形した状態を示している。なお、図１３中における一点鎖線は、摺動部１２０が熱膨張して変形する前の状態の、溝部１２５の内側面（前側延出部１２１の後側面及び後側延出部１２２の前側面）の位置を示している。このように、摺動部１２０が熱膨張して変形する場合、摺動部１２０のうち最も幅の小さい箇所である溝部１２５（より詳細には、前側延出部１２１及び後側延出部１２２）が、幅方向（前後方向）に太くなるように（溝部１２５の内径が狭まるように）変形する（図１３中の黒色矢印参照）。すなわち、摺動部１２０が熱膨張して変形する場合、外径方向へ変形し難くして、ひいては摺動部１２０の外径方向に配置される本体部１１０への影響を軽減させることができる。 Here, FIG. 13 shows a state in which the turbocharger 1 becomes hot and the sliding portion 120 is thermally expanded and deformed. Note that the alternate long and short dash line in FIG. 13 indicates the inner surface of the groove 125 (the rear side surface of the front extension portion 121 and the front side surface of the rear extension portion 122 before the sliding portion 120 is thermally expanded and deformed. ) Position. Thus, when the sliding part 120 is thermally expanded and deformed, the groove part 125 (more specifically, the front side extension part 121 and the rear side extension part 122) that is the narrowest part of the sliding part 120. ) Is deformed so as to be thick in the width direction (front-rear direction) (so that the inner diameter of the groove portion 125 is narrowed) (see the black arrow in FIG. 13). That is, when the sliding part 120 is thermally expanded and deformed, it is difficult to deform in the outer diameter direction, and as a result, the influence on the main body 110 arranged in the outer diameter direction of the sliding part 120 can be reduced. .
　このように、前述したような構成により、例えば第一部材（摺動部１２０）が第二部材（本体部１１０）よりも熱膨張係数が大きい材料である場合に、当該第一部材（摺動部１２０）が熱膨張すると溝部１２５の内径が狭まるように（幅方向に）変形することになり、第二部材（本体部１１０）への影響を低減させることができる。 As described above, when the first member (sliding portion 120) is made of a material having a larger thermal expansion coefficient than the second member (main body portion 110), for example, the first member (sliding portion) is configured as described above. When the portion 120) is thermally expanded, the groove portion 125 is deformed so that the inner diameter of the groove portion 125 is narrowed (in the width direction), and the influence on the second member (main body portion 110) can be reduced.
　また、スラスト軸受１００においては、
　前記溝部１２５は、前記外周縁部の周方向に延出され、一側端部と他側端部とが連通するものである。 In the thrust bearing 100,
The groove portion 125 extends in the circumferential direction of the outer peripheral edge portion, and one end portion and the other end portion communicate with each other.
　このような構成により、溝部１２５は正面視で円環状となる。すなわち、溝部１２５は一側端部と他側端部とが連通することにより、当該第一部材（摺動部１２０）の外周縁部を一周することになり、摺動部１２０が熱膨張して変形した場合であっても、第二部材（本体部１１０）への影響をより低減させることができる。 With such a configuration, the groove 125 has an annular shape when viewed from the front. That is, the groove portion 125 makes one round of the outer peripheral edge portion of the first member (sliding portion 120) when the one side end portion and the other side end portion communicate with each other, and the sliding portion 120 is thermally expanded. Even if it is a case where it deform | transforms, the influence on the 2nd member (main-body part 110) can be reduced more.
　また、スラスト軸受１００においては、
　前記第一部材（摺動部１２０）の前記スラストカラー（第一カラー１１及び第二カラー１２）との摺動面（摺動部１２０の前側面及び後側面）に潤滑油を供給するための潤滑油路１３０を具備し、
　前記潤滑油路１３０には、前記第一部材（摺動部１２０）に形成される第一部材油路（第二油路１２９及び第三油路１２６）を含み、
　前記第一部材油路には、当該第一部材油路の一部として前記溝部１２５（第二油路１２９）が用いられるものである。 In the thrust bearing 100,
Lubricating oil is supplied to the sliding surfaces (the front side surface and the rear side surface of the sliding portion 120) of the first member (sliding portion 120) with the thrust collar (first collar 11 and second collar 12). Comprising a lubricating oil passage 130;
The lubricating oil passage 130 includes a first member oil passage (second oil passage 129 and third oil passage 126) formed in the first member (sliding portion 120),
In the first member oil passage, the groove part 125 (second oil passage 129) is used as a part of the first member oil passage.
　ここで、図１３は、第二油路１２９が潤滑油により充填された状態を示している。図１３に示すように、第二油路１２９に充填された潤滑油がスラスト軸受１００よりも低温である場合には、当該充填された潤滑油により当該スラスト軸受１００（特に、摺動部１２０）の熱を奪い、当該スラスト軸受１００（特に、摺動部１２０）を冷却することができる（図１３中の白色矢印参照）。 Here, FIG. 13 shows a state in which the second oil passage 129 is filled with lubricating oil. As shown in FIG. 13, when the lubricating oil filled in the second oil passage 129 is at a lower temperature than the thrust bearing 100, the thrust bearing 100 (particularly the sliding portion 120) is filled with the filled lubricating oil. The thrust bearing 100 (in particular, the sliding portion 120) can be cooled (see the white arrow in FIG. 13).
　また、第二油路１２９には第一油路１１４から常に新しい潤滑油が供給されるため、当該潤滑油による冷却効果を継続させることができる。 Further, since new lubricating oil is always supplied from the first oil passage 114 to the second oil passage 129, the cooling effect by the lubricating oil can be continued.
　このように、前述したような構成により、溝部１２５（第二油路１２９）に潤滑油が流通することにより、第一部材（摺動部１２０）を冷却することができる。 Thus, with the configuration as described above, the first member (sliding portion 120) can be cooled by the lubricating oil flowing through the groove portion 125 (second oil passage 129).
　また、スラスト軸受１００においては、
　前記潤滑油路１３０には、前記第二部材（本体部１１０）に形成される第二部材油路（第一油路１１４）を含み、
　前記第二部材油路（第一油路１１４）の吐出口（第一油路吐出口１１６）は、前記溝部１２５（第二油路１２９）内を臨むように形成され、
　前記第一部材油路には、前記溝部１２５（第二油路１２９）と前記シャフト１０に挿通される挿通孔１２３とを連通する連通路（第三油路１２６）が設けられるものである。 In the thrust bearing 100,
The lubricating oil passage 130 includes a second member oil passage (first oil passage 114) formed in the second member (main body portion 110).
A discharge port (first oil passage discharge port 116) of the second member oil passage (first oil passage 114) is formed so as to face the inside of the groove portion 125 (second oil passage 129).
The first member oil passage is provided with a communication passage (third oil passage 126) that communicates the groove portion 125 (second oil passage 129) and the insertion hole 123 inserted through the shaft 10.
　ここで、図１８は、従来のスラスト軸受９００の構成を示している。従来のスラスト軸受９００は、その内部に潤滑油路９１０が形成される。そして、潤滑油路９１０の潤滑油給入口９２０は、スラスト軸受９００の前上部に形成されている。他方、潤滑油路９１０の潤滑油吐出口９３０は、スラスト軸受９００の貫通孔９４０の内周面の後部に形成されている。こうして、潤滑油給入口９２０と潤滑油吐出口９３０とを結ぶ潤滑油路９１０は、上下方向（スラスト軸受９００の板面方向）に対して若干傾斜した斜め方向に形成されることになる。このように、従来のスラスト軸受９００は、比較的細長い一本の潤滑油路９１０をドリル加工により斜め方向に形成する必要があり、その加工が困難であった。 Here, FIG. 18 shows a configuration of a conventional thrust bearing 900. The conventional thrust bearing 900 has a lubricating oil passage 910 formed therein. The lubricating oil supply port 920 of the lubricating oil passage 910 is formed in the front upper part of the thrust bearing 900. On the other hand, the lubricating oil outlet 930 of the lubricating oil passage 910 is formed in the rear part of the inner peripheral surface of the through hole 940 of the thrust bearing 900. Thus, the lubricating oil passage 910 connecting the lubricating oil supply port 920 and the lubricating oil discharge port 930 is formed in an oblique direction slightly inclined with respect to the vertical direction (the plate surface direction of the thrust bearing 900). As described above, the conventional thrust bearing 900 needs to form a relatively slender lubricating oil passage 910 in an oblique direction by drilling, which is difficult to process.
　これに対して、本実施形態では、スラスト軸受１００は、摺動部１２０及び本体部１１０が別体により構成される。そして、摺動部１２０には、潤滑油路１３０の一部として溝部１２５及び第三油路１２６がそれぞれ形成される。また、本体部１１０には、潤滑油路１３０の一部として第一油路１１４が形成される。そして、潤滑油路１３０は、摺動部１２０が本体部１１０へ取り付けられることにより形成される。したがって、スラスト軸受１００は、潤滑油路１３０を形成するために、従来のスラスト軸受９００のように比較的細長い一本の潤滑油路９１０をドリル加工により斜め方向に形成する必要が無い。すなわち、スラスト軸受１００の潤滑油路１３０は、比較的短い長さの油路（第一油路１１４及び第三油路１２６）を組み合わせて形成されるので、その加工を容易とすることができる。 On the other hand, in the present embodiment, the thrust bearing 100 is configured such that the sliding portion 120 and the main body portion 110 are separately provided. A groove portion 125 and a third oil passage 126 are formed in the sliding portion 120 as part of the lubricating oil passage 130, respectively. Further, a first oil passage 114 is formed in the main body 110 as a part of the lubricating oil passage 130. The lubricating oil path 130 is formed by attaching the sliding part 120 to the main body part 110. Therefore, in order to form the lubricating oil passage 130, the thrust bearing 100 does not need to form one relatively elongated lubricating oil passage 910 in an oblique direction by drilling, unlike the conventional thrust bearing 900. That is, since the lubricating oil passage 130 of the thrust bearing 100 is formed by combining a relatively short length of oil passage (the first oil passage 114 and the third oil passage 126), the processing can be facilitated. .
　また、スラスト軸受１００においては、
　前記第一部材油路の連通路（第三油路１２６）は、前記溝部１２５の幅方向中央部から前記挿通孔１２３の軸心方向に対して垂直方向に向けて設けられるものである。 In the thrust bearing 100,
The communication passage (third oil passage 126) of the first member oil passage is provided from the central portion in the width direction of the groove portion 125 in a direction perpendicular to the axial direction of the insertion hole 123.
　こうして、第三油路１２６は、挿通孔１２３の軸心（前後）方向に対して垂直方向に向けて設けられるため、例えば挿通孔１２３の軸心（前後）方向に対して垂直方向から傾いた方向（斜め方向）に設けられる場合よりも容易に形成することができる。
　また、第三油路１２６は、第一油路１１４と合わせて同一直線状に形成されていなくても（具体的には、第一油路１１４の第一油路吐出口１１６と第三油路１２６の第三油路給入口とが側面視で前後方向にずれて配置されていても）摺動部１２０の摺動面に潤滑油を供給することができる。つまり、摺動部１２０を本体部１１０へ取り付けるときに、摺動部１２０と本体部１１０との位置合わせを精密に行わなくても摺動部１２０の摺動面に潤滑油を供給することができるため、当該位置合わせを精密に行う必要が無く、その加工をより容易とすることができる。 Thus, since the third oil passage 126 is provided in a direction perpendicular to the axial (front-rear) direction of the insertion hole 123, for example, the third oil passage 126 is inclined from the vertical direction with respect to the axial (front-rear) direction of the insertion hole 123 It can be formed more easily than when it is provided in the direction (oblique direction).
Further, the third oil passage 126 may not be formed in the same straight line as the first oil passage 114 (specifically, the first oil passage outlet 116 of the first oil passage 114 and the third oil passage 114). Lubricating oil can be supplied to the sliding surface of the sliding portion 120 (even if the third oil passage inlet of the passage 126 is shifted in the front-rear direction in a side view). That is, when attaching the sliding part 120 to the main body part 110, the lubricating oil can be supplied to the sliding surface of the sliding part 120 without precisely aligning the sliding part 120 and the main body part 110. Therefore, it is not necessary to perform the alignment precisely, and the processing can be made easier.
　また、スラスト軸受１００においては、
　前記スラスト軸受１００は、ターボチャージャ１に用いられるものである。 In the thrust bearing 100,
The thrust bearing 100 is used for the turbocharger 1.
　このような構成により、ターボチャージャ１は、製造コストを比較的安くすることができ、且つスラスト軸受１００とスラストカラー（第一カラー１１及び第二カラー１２）との摺動面における焼き付きや異常摩耗（損傷）等を充分に防止することができる。 With such a configuration, the turbocharger 1 can be manufactured at a relatively low cost, and seizure and abnormal wear on the sliding surface between the thrust bearing 100 and the thrust collar (first collar 11 and second collar 12). (Damage) can be sufficiently prevented.
　なお、本実施形態における銅系材料は、本発明に係る「摺動材料」の一実施形態である。本発明に係る「摺動材料」は、銅系材料に限定するものではなく、比較的優れた耐焼き付き性や耐摩耗性を有する材料であればよい。
　また、本実施形態に係る鉄系材料は、本発明に係る「前記摺動材料とは異なる材料」の一実施形態である。本発明に係る「前記摺動材料とは異なる材料」とは、鉄系材料に限定するものではなく、比較的優れた耐焼き付き性や耐摩耗性を有していなくても、比較的安価な材料であることが望ましい。 The copper-based material in the present embodiment is an embodiment of the “sliding material” according to the present invention. The “sliding material” according to the present invention is not limited to a copper-based material, and may be any material having relatively excellent seizure resistance and wear resistance.
The iron-based material according to the present embodiment is an embodiment of “a material different from the sliding material” according to the present invention. The “material different from the sliding material” according to the present invention is not limited to an iron-based material, and is relatively inexpensive even if it does not have relatively excellent seizure resistance or wear resistance. A material is desirable.
　なお、第一カラー１１及び第二カラー１２は、本発明に係る「スラストカラー」の一実施形態である。本発明に係る「スラストカラー」の構成は、第一カラー１１及び第二カラー１２の構成に限定するものではない。例えば、本発明に係る「スラストカラー」は、２つのカラーから構成されるのではなく、１つのカラーから構成されてもよい。 The first color 11 and the second color 12 are an embodiment of the “thrust color” according to the present invention. The configuration of the “thrust color” according to the present invention is not limited to the configuration of the first color 11 and the second color 12. For example, the “thrust color” according to the present invention may be composed of one color instead of two colors.
　また、摺動部１２０は、本発明に係る「第一部材」の一実施形態である。本発明に係る「第一部材」の構成は、摺動部１２０の構成に限定するものではない。例えば、本発明に係る「第一部材」は、外周縁部の形状が正面視で略矩形状であってもよい。
　また、溝部１２５は、本発明に係る「溝部」の一実施形態である。本発明に係る「溝部」の構成は、溝部１２５の構成に限定するものではない。例えば、本発明に係る「溝部」は、断面視で略Ｕ字状に凹んだ形状であってもよい。 The sliding portion 120 is an embodiment of the “first member” according to the present invention. The configuration of the “first member” according to the present invention is not limited to the configuration of the sliding portion 120. For example, in the “first member” according to the present invention, the shape of the outer peripheral edge may be substantially rectangular in a front view.
The groove 125 is an embodiment of the “groove” according to the present invention. The configuration of the “groove portion” according to the present invention is not limited to the configuration of the groove portion 125. For example, the “groove portion” according to the present invention may have a shape recessed in a substantially U shape in a cross-sectional view.
　また、本体部１１０は、本発明に係る「第二部材」の一実施形態である。本発明に係る「第二部材」の構成は、本体部１１０の構成に限定するものではない。 The main body 110 is an embodiment of the “second member” according to the present invention. The configuration of the “second member” according to the present invention is not limited to the configuration of the main body 110.
　また、潤滑油路１３０は、本発明に係る「潤滑油路」の一実施形態である。また、第二油路１２９及び第三油路１２６は、本発明に係る「第一部材油路」の一実施形態である。また、第三油路１２６は、本発明に係る「連通路」の一実施形態である。また、第一油路１１４は、本発明に係る「第二部材油路」の一実施形態である。本発明に係るこれらの構成は、本実施形態に係る構成に限定するものではない。 Further, the lubricating oil passage 130 is an embodiment of the “lubricating oil passage” according to the present invention. The second oil passage 129 and the third oil passage 126 are an embodiment of the “first member oil passage” according to the present invention. The third oil passage 126 is an embodiment of the “communication passage” according to the present invention. The first oil passage 114 is an embodiment of the “second member oil passage” according to the present invention. These configurations according to the present invention are not limited to the configurations according to the present embodiment.
　以下では、本発明の第二実施形態に係るスラスト軸受２００の構成について、図１４から図１６を用いて説明する。 Hereinafter, the configuration of the thrust bearing 200 according to the second embodiment of the present invention will be described with reference to FIGS. 14 to 16.
　図１４及び図１５（ａ）に示すように、第二実施形態に係るスラスト軸受２００の構成においては、第三油路１２６が溝部１２５の上部に形成されるのではなく、溝部１２５の下部に形成される。 As shown in FIGS. 14 and 15A, in the configuration of the thrust bearing 200 according to the second embodiment, the third oil passage 126 is not formed at the upper portion of the groove portion 125 but at the lower portion of the groove portion 125. It is formed.
　このような構成により、図１５（ａ）に示すように、第一油路１１４から第二油路１２９に供給された潤滑油は、当該第二油路１２９の上部から下部まで左右に分かれて流通した後に、第三油路１２６に給入されることになる。したがって、第二油路１２９には第一油路１１４から供給された新しい潤滑油が常に流通することになため、潤滑油による冷却効果をより高めることができる。 With this configuration, as shown in FIG. 15A, the lubricating oil supplied from the first oil passage 114 to the second oil passage 129 is divided into left and right parts from the upper part to the lower part of the second oil passage 129. After distribution, the oil is supplied to the third oil passage 126. Therefore, since the new lubricating oil supplied from the first oil path 114 always flows through the second oil path 129, the cooling effect by the lubricating oil can be further enhanced.
　なお、図１５（ｂ）に示すように、第三油路１２６は、１つだけ形成するのではなく、複数形成してもよい。これによって、スラスト軸受２００の摺動部１２０において、潤滑油が必要とする箇所に、必要な量だけ当該潤滑油を供給することができる。 In addition, as shown in FIG.15 (b), you may form not only one third oil path 126 but multiple. As a result, in the sliding portion 120 of the thrust bearing 200, it is possible to supply the lubricating oil in a necessary amount to a location where the lubricating oil is required.
　また、図１６に示すように、スラスト軸受２００は、摺動部１２０の幅方向（前後方向）の長さＷ２が、本体部１１０の幅方向（前後方向）長さＷ１よりも長くなるように形成されてもよい。これによって、摺動部１２０の第一カラー１１及び第二カラー１２との摺動面が摩耗した場合であっても、摺動部１２０の幅方向の長さが本体部１１０の幅方向の長さよりも短くなり難くし、例えば第一カラー１１及び第二カラー１２が摺動部１２０の摺動面以外の箇所と摺動することを防止することができる。 As shown in FIG. 16, the thrust bearing 200 is configured such that the width W (front-rear direction) length W <b> 2 of the sliding portion 120 is longer than the width W (front-rear direction) length W <b> 1 of the main body 110. It may be formed. Thus, even when the sliding surfaces of the sliding portion 120 with the first collar 11 and the second collar 12 are worn, the length of the sliding portion 120 in the width direction is the length of the main body portion 110 in the width direction. For example, the first collar 11 and the second collar 12 can be prevented from sliding with a portion other than the sliding surface of the sliding portion 120.
　以下では、本発明の第三実施形態に係るスラスト軸受３００の構成について、図１７を用いて説明する。 Hereinafter, the configuration of the thrust bearing 300 according to the third embodiment of the present invention will be described with reference to FIG.
　図１７に示すように、第三実施形態に係るスラスト軸受３００の構成においては、前記第二部材油路（第一油路１１４）と、前記第一部材油路の連通路（第三油路１２６）とは、同一直線状に形成されるものである。 As shown in FIG. 17, in the configuration of the thrust bearing 300 according to the third embodiment, the second member oil passage (first oil passage 114) and the communication passage (third oil passage) of the first member oil passage. 126) is formed in the same straight line.
　こうして、第一油路１１４と第三油路１２６とが同一直線状に形成されることにより、第一油路吐出口１１６と第三油路給入口１２７とが近くに配置される。すなわち、第一油路吐出口１１６と第三油路給入口１２７とが対向し、第一油路吐出口１１６から吐出された潤滑油の吐出方向に第三油路吐出口１２８が配置されるため、第一油路吐出口１１６を介して当該第二油路１２９に吐出される潤滑油により、第三油路給入口１２７を介して第三油路１２６に潤滑油を給入し易くすることができる。 Thus, the first oil passage 114 and the third oil passage 126 are formed in the same straight line, so that the first oil passage outlet 116 and the third oil passage inlet 127 are arranged close to each other. That is, the first oil passage outlet 116 and the third oil passage inlet 127 face each other, and the third oil passage outlet 128 is disposed in the direction of discharge of the lubricating oil discharged from the first oil passage outlet 116. Therefore, the lubricating oil discharged to the second oil passage 129 via the first oil passage outlet 116 makes it easy to supply the lubricating oil to the third oil passage 126 via the third oil passage inlet 127. be able to.
　このように、前述したような構成により、比較的低い圧力であっても潤滑油をシャフト１０に挿通される挿通孔１２３まで供給することができる。すなわち、潤滑油を供給するための油圧ポンプ等（不図示）を小型化することができる。 Thus, with the configuration as described above, the lubricating oil can be supplied to the insertion hole 123 inserted into the shaft 10 even at a relatively low pressure. That is, a hydraulic pump or the like (not shown) for supplying lubricating oil can be reduced in size.
　本発明は、シャフトに設けられたスラストカラーに対向して配置されるスラスト軸受に利用可能である。 The present invention can be used for a thrust bearing disposed to face a thrust collar provided on a shaft.
　１　　　ターボチャージャ
　１１　　第一カラー
　１２　　第二カラー
　１００　スラスト軸受
　１１０　本体部
　１１４　第一油路
　１１６　第一油路吐出口
　１２０　摺動部
　１２３　挿通孔
　１２５　溝部
　１２６　第三油路
　１２９　第二油路
　１３０　潤滑油路 DESCRIPTION OF SYMBOLS 1 Turbocharger 11 1st color | collar 12 2nd color | collar 100 Thrust bearing 110 Main body part 114 1st oil path 116 1st oil path discharge port 120 Sliding part 123 Insertion hole 125 Groove part 126 3rd oil path 129 2nd oil path 130 Lubrication Oil passage

Claims (7)

  1. 　シャフトに設けられたスラストカラーに対向して配置されるスラスト軸受であって、
    　摺動材料により形成され、前記スラストカラーに対して摺動する第一部材と、
    　前記摺動材料とは異なる材料により形成され、前記第一部材に外嵌される第二部材と、
    　を具備する、
    　ことを特徴とするスラスト軸受。     A thrust bearing disposed opposite a thrust collar provided on the shaft,
    A first member formed of a sliding material and sliding relative to the thrust collar;
    A second member formed of a material different from the sliding material and fitted over the first member;
    Comprising
    Thrust bearing characterized by that.
  2. 　前記第一部材の外周縁部には、幅方向中央部が内側へ向けて凹んだ溝部が設けられる、
    　ことを特徴とする請求項１に記載のスラスト軸受。     The outer peripheral edge of the first member is provided with a groove that is recessed inward in the width direction center.
    The thrust bearing according to claim 1.
  3. 　前記溝部は、前記外周縁部の周方向に延出され、一側端部と他側端部とが連通する、
    　ことを特徴とする請求項２に記載のスラスト軸受。     The groove portion extends in a circumferential direction of the outer peripheral edge portion, and one side end portion and the other side end portion communicate with each other.
    The thrust bearing according to claim 2.
  4. 　前記第一部材の前記スラストカラーとの摺動面に潤滑油を供給するための潤滑油路を具備し、
    　前記潤滑油路には、前記第一部材に形成される第一部材油路を含み、
    　前記第一部材油路には、当該第一部材油路の一部として前記溝部が用いられる、
    　ことを特徴とする請求項２または請求項３に記載のスラスト軸受。     Comprising a lubricating oil passage for supplying lubricating oil to the sliding surface of the first member with the thrust collar;
    The lubricating oil passage includes a first member oil passage formed in the first member,
    In the first member oil passage, the groove is used as a part of the first member oil passage.
    The thrust bearing according to claim 2 or 3, wherein the thrust bearing is provided.
  5. 　前記潤滑油路には、前記第二部材に形成される第二部材油路を含み、
    　前記第二部材油路の吐出口は、前記溝部内を臨むように形成され、
    　前記第一部材油路には、前記溝部と前記シャフトに挿通される挿通孔とを連通する連通路が設けられる、
    　ことを特徴とする請求項２から請求項４までのいずれか一項に記載のスラスト軸受。     The lubricating oil passage includes a second member oil passage formed in the second member,
    The discharge port of the second member oil passage is formed so as to face the inside of the groove,
    The first member oil passage is provided with a communication path that communicates the groove and an insertion hole that is inserted through the shaft.
    The thrust bearing according to any one of claims 2 to 4, wherein the thrust bearing is provided.
  6. 　前記第一部材油路の連通路は、前記溝部の幅方向中央部から前記挿通孔の軸心方向に対して垂直方向に向けて設けられる、
    　ことを特徴とする請求項５に記載のスラスト軸受。     The communication path of the first member oil passage is provided in a direction perpendicular to the axial direction of the insertion hole from the center in the width direction of the groove.
    The thrust bearing according to claim 5.
  7. 　前記スラスト軸受は、ターボチャージャに用いられる、
    　ことを特徴とする請求項１から請求項６までのいずれか一項に記載のスラスト軸受。     The thrust bearing is used for a turbocharger,
    The thrust bearing according to any one of claims 1 to 6, wherein the thrust bearing is provided.
PCT/JP2014/052560 2013-02-04 2014-02-04 Thrust bearing WO2014119797A1 (en)

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CN109973528A (en) * 2014-12-18 2019-07-05 三菱重工发动机和增压器株式会社 The discharge equipment of thrust bearing and turbocharger including it

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