WO2015128925A1 - オイルセパレータ - Google Patents
オイルセパレータ Download PDFInfo
- Publication number
- WO2015128925A1 WO2015128925A1 PCT/JP2014/054426 JP2014054426W WO2015128925A1 WO 2015128925 A1 WO2015128925 A1 WO 2015128925A1 JP 2014054426 W JP2014054426 W JP 2014054426W WO 2015128925 A1 WO2015128925 A1 WO 2015128925A1
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- WO
- WIPO (PCT)
- Prior art keywords
- oil
- gas
- spindle
- lower case
- oil separator
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/02—Continuous feeding or discharging; Control arrangements therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/005—Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
- B04B2005/125—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers the rotors comprising separating walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0422—Separating oil and gas with a centrifuge device
Definitions
- the present invention relates to an oil separator that separates mist oil contained in a gas to be treated from gas.
- an oil separator that separates mist oil contained in a gas to be treated from gas.
- an oil separator disclosed in Patent Document 1 includes a cylindrical fixed housing and a cylindrical fixed casing having a ceiling portion, and a truncated cone-shaped partition having an opening on the upper surface, and a lower chamber (lower storage chamber).
- the upper chamber (upper accommodation chamber) is partitioned.
- a centrifugal rotor for purifying oil is disposed in the lower chamber, and a gas purifying device for purifying gas is disposed in the upper chamber.
- the lower end of the fixed housing is joined to the base, and the lower chamber communicates with the internal space of the cylindrical base.
- the cylindrical base is communicated with the combustion engine, and the purified oil is returned and gas from the crankcase is introduced.
- the centrifugal rotor and the gas purification device are connected by a tubular support member, and are configured to be rotatable around a fixed shaft inserted through the support member.
- a separation chamber is provided inside the centrifugal rotor. Oil is supplied to the separation chamber through a gap between the support member and the fixed shaft and a hole opened in the support member. The supplied oil is purified in the separation chamber and then discharged to the side through a discharge port provided on the bottom surface of the centrifugal rotor. The oil discharge generates a driving force for rotating the centrifugal rotor and the gas purification device.
- the above-mentioned oil separator has a vertically long structure because a centrifuge rotor is arranged in the lower chamber and an oil discharge port is provided at the lower end of the centrifuge rotor. For this reason, even if the conventional oil separator is mounted on a vehicle such as a truck, the height from the oil outlet to the opening of the partition can be sufficiently secured. Therefore, even if the oil separator is tilted, it is unlikely that a problem occurs.
- the centrifuge rotor in the lower chamber.
- a communication portion with the combustion engine that is, an oil discharge passage and a gas introduction passage are arranged immediately below the partition.
- an oil outlet is also arranged immediately below the partition. If the oil separator is tilted in this configuration, the oil may be undulated by the gas introduced from the engine and flow into the upper chamber beyond the partition. Then, due to the inflow of oil, the rotational speed of the gas purification device disposed in the upper chamber may decrease, and the gas purification performance may be impaired.
- the present invention has been made in view of such circumstances, and its purpose is to suppress the oil undulation caused by the introduced gas even when the oil separator is inclined, and to maintain the gas purification performance at a high level. There is to do.
- the present invention provides an oil separator for separating mist-like oil contained in a gas to be processed, which is provided so as to be rotatable together with a spindle, and is stacked in the axial direction of the spindle.
- a separation disk, a nozzle projecting from a peripheral surface below the separation disk in the spindle, and a nozzle for rotating the spindle about an axis by injecting oil from an injection hole, and the processing target gas are introduced.
- a gas introduction part a lower case provided with an oil discharge part for discharging oil, and a storage chamber that is attached to the lower case from above and accommodates the spindle, the separation disk, and the nozzle
- An upper case that is partitioned together with the lower case, and the storage chamber is partitioned into a lower storage chamber and an upper storage chamber, and the lower case
- the gas inlet inlet end of the processing object gas faces the outside of the lower case, and the gas outlet inlet end of the gas to be processed is constituted by a cylindrical member facing the lower side of the nozzle.
- the gas introduction part provided in the lower case is constituted by the cylindrical member, the introduction inlet end faces the outside of the lower case, and the introduction outlet end faces the lower side of the nozzle. Therefore, the undulation of the oil flowing through the oil discharge part can be suppressed by introducing the gas to be treated by the gas introduction part. Thereby, even if the oil separator is inclined, the inflow of oil into the upper storage chamber can be prevented, and the gas purification performance can be maintained at a high level.
- the spindle is rotatably supported by a spindle shaft, and the lower case is provided with a joint portion into which the lower end portion of the spindle shaft is fitted, and the gas introduction portion on the inlet / outlet side Preferably, the portion is provided along the joint portion.
- the processing target gas can be introduced into the upper storage chamber from the rotation center side with respect to the trajectory of the injection hole.
- the spindle shaft may be configured by a cylindrical member that supplies oil serving as power for the spindle
- the joint portion may be configured by a cylindrical member that supplies the oil to the spindle shaft.
- the rigidity of the joint portion that partitions the oil supply flow path can be increased by the introduction outlet side portion.
- the inlet / outlet end of the gas to be processed is within a height range below the injection hole height by the rotation diameter d of the injection hole, and within a rotation diameter range of 1.5 d. It is preferable to make it face. In this configuration, the inlet / outlet end faces the predetermined range with respect to the nozzle, so that even if the oil separator is tilted, oil can be reliably prevented from flowing into the upper storage chamber.
- the partition member is a ring-shaped plate member that is inclined downward toward the outer peripheral side, and the oil sprayed from the injection holes is sprayed onto a downwardly inclined surface. In this configuration, the injected oil flows downward, and mixing of the oil into the treated gas can be suppressed.
- the apparatus when the introduction inlet side portion of the gas introduction part is provided in parallel with the oil discharge part, the apparatus can be miniaturized.
- an oil separator that separates mist-like oil contained in a gas to be treated from gas, even if the oil separator is tilted, the oil rippling due to the introduced gas is suppressed, and the gas purification performance is high. Can be maintained at a level.
- FIG. 1 a closed crankcase ventilation system 1 (hereinafter referred to as a ventilation system 1) shown in FIG. 1 will be described as an example.
- the ventilation system 1 has an oil separator 2 and a breather pipe 3.
- the oil separator 2 processes blow-by gas (corresponding to a processing target gas containing mist-like oil) discharged from the engine, and separates the mist-like oil.
- the oil separator 2 is attached to the side surface of the engine 4.
- the breather pipe 3 defines a reduction passage for reducing the treated blow-by gas discharged from the oil separator 2 to the intake-side passage 5 of the engine 4.
- blow-by gas discharged from the engine 4 is introduced into an oil separator 2 provided on the side of the engine 4. Then, the oil separated by the oil separator 2 is returned to the engine 4.
- the treated blow-by gas is discharged from the upper end of the oil separator 2 and then returned to the intake-side flow path 5 through the breather pipe 3. Specifically, it is reduced to a portion where the air filter 6 and the turbocharger 7 are connected in the intake side flow path 5.
- the reduced blow-by gas is mixed with fresh air from the air filter 6 and compressed by the turbocharger 7. Thereafter, it is cooled by the charge cooler 8 and supplied to the engine 4.
- the oil separator 2 includes a housing 11 having a lower case 12 and an upper case 13. Various components such as a rotor unit and a PCV valve are accommodated in an internal space (accommodating chamber) of the housing 11 (described later).
- the lower case 12 is a portion that divides the lower portion of the housing 11, and is configured by a box-shaped member having a bottom and an open upper surface.
- the lower case 12 and the communication tube portion are made of a casting, but may be made by molding a resin.
- a circular fitting portion 14 is provided at the upper end portion of the lower case 12 and is fitted to the lower end portion 15 of the upper case 13.
- a communication cylinder portion 16 that communicates with the engine 4 is provided facing rearward.
- a cylindrical member 17 (see FIG. 3), which will be described later, is provided in the vicinity of the communication cylinder portion 16. This cylindrical member 17 functions as a gas introduction part into which blowby gas is introduced.
- the communication cylinder part 16 functions as an oil discharge part from which the separated oil is discharged.
- a flange 18 that is coupled to the side surface of the engine 4 is provided at the distal end portion of the communication tube portion 16.
- the lower end portion of the joint portion 19 projects downward from the bottom surface of the lower case 12.
- the joint portion 19 has a cylindrical shape and is connected to one end of the oil supply pipe 9 shown in FIG. As will be described later, a part of the joint portion 19 protrudes upward in the lower case 12.
- the other end of the oil supply pipe 9 is connected to the side surface of the engine 4, and oil is supplied to the oil supply pipe 9 from an oil passage (not shown) provided inside the engine 4. This oil is used as power for rotating the rotor unit 21 shown in FIG.
- the upper case 13 is a member attached to the lower case 12 from above, and divides the accommodation chamber in which the rotor unit 21 and the like are accommodated together with the lower case 12.
- the upper case 13 has a cylindrical main body cover 22 and a disk-shaped upper surface cover 23.
- a plurality of vertical ribs 24 are formed on the inner surface of the main body cover 22 at equal intervals in the circumferential direction. These vertical ribs 24 are used to capture and unite the separated oil flowing in the circumferential direction along the inner surface of the main body cover 22 and to flow downward.
- the upper surface cover 23 is attached to the upper end portion of the main body cover 22 in an airtight state.
- a cylindrical gas discharge portion 25 is provided at the center of the top cover 23 so as to face upward.
- the gas discharge part 25 is a part for discharging the blow-by gas after processing, and the breather pipe 3 is connected via the outlet pipe 26.
- a rotor unit 21 and a partition member 27 are disposed inside the oil separator 2. Further, as shown in the cross-sectional view of FIG. 5, a PCV valve 28 is attached inside the upper surface cover 23.
- the rotor unit 21 is a mechanism for separating mist-like oil contained in blow-by gas, and has a rotor 31, a spindle 32, and a spindle shaft 33 as shown in FIG.
- the rotor 31 is a part that aggregates mist-like oil by rotation and separates it from blow-by gas, and includes a plurality of separation disks 34, an upper holder 35, and a lower holder 36.
- the separation disk 34 is a ring-shaped plate material that is inclined downward toward the outer peripheral side, in other words, a plate material that is processed into a side surface shape of a truncated cone.
- the separation disk 34 of the present embodiment has a thickness of 1 mm or less and is manufactured by resin molding. These separation disks 34 are stacked in the axial direction of the spindle 32. For convenience of explanation, the separation disks 34 are drawn with an interval between them, but the actual interval is set to be extremely narrow (for example, less than 1 mm).
- the upper holder 35 is a member that holds a plurality of stacked separation disks 34 from above, and the lower holder 36 is also a member that holds the separation disk 34 from below.
- a plurality of connecting arms 36a for connecting to the upper holder 35 are provided on the outer peripheral edge of the lower holder 36 (see FIG. 4). In the present embodiment, four connection arms 36a are provided at intervals of 90 degrees in the circumferential direction.
- the rotor 31 has a cylindrical appearance. As shown in FIG. 5, the inner peripheral side is a hollow portion and penetrates in the vertical direction. A spindle 32 is inserted into the hollow portion, and the spindle 32 and the rotor 31 are coupled to each other. For this reason, the rotor 31 rotates around the axis of the spindle 32 together with the spindle 32.
- a nozzle 37 projects from the peripheral surface of the spindle 32 below the rotor 31.
- the nozzle 37 is a portion that injects oil supplied through the spindle shaft 33, and generates a driving force for rotating the spindle 32 and the rotor 31.
- the nozzle 37 of the present embodiment has a cylindrical nozzle body 38 whose base end is joined to the spindle 32 and whose tip is closed, and an injection hole 39 provided at the tip of the nozzle body 38. .
- the nozzle body 38 is attached at an angle of 45 degrees obliquely downward with respect to the axial direction of the spindle 32 indicated by reference numeral AL.
- Three nozzle bodies 38 are provided at intervals of 120 degrees in the circumferential direction.
- the injection hole 39 is provided on the side surface of the tip portion of the nozzle body 38. Specifically, the injection hole 39 is provided in a direction orthogonal to the axial direction of the nozzle main body 38 indicated by reference numeral NL and in a direction in which oil is injected in the horizontal direction.
- the spindle shaft 33 is a cylindrical member serving as a bearing for the spindle 32, and supports the spindle 32 in a rotatable state. As shown in FIG. 5, an oil supply path 33 a for supplying oil is formed inside the spindle shaft 33.
- the lower end portion of the spindle shaft 33 is joined to the upper end portion of the joint portion 19 provided in the lower case 12.
- the oil supply pipe 9 is connected to the joint portion 19. For this reason, the oil supplied through the oil supply pipe 9 flows into the spindle shaft 33 after passing through the joint portion 19. Further, after flowing into the nozzle main body 38, it is injected from the injection hole 39.
- the injection hole 39 is provided at the tip of the nozzle body 38 in a direction in which oil is injected in the horizontal direction. And in the three nozzles 37 provided at intervals of 120 degrees, the formation positions of the injection holes 39 are aligned. For this reason, when oil is injected from each injection hole 39, the rotor 31 and the spindle 32 rotate around the spindle shaft 33.
- the partition member 27 partitions the internal space (storage chamber) of the housing 11 into a lower storage chamber 41 (primary separation chamber) and an upper storage chamber 42 (secondary separation chamber). It is a member that forms a communication port 43 that guides the blow-by gas in the side storage chamber 41 to the upper storage chamber 42.
- the partition member 27 has an outer peripheral portion 44 and a tapered portion 45.
- the outer peripheral portion 44 is a portion having a short cylindrical shape, and a flange portion 46 projects laterally in the middle of the height direction.
- the tapered portion 45 is provided on the inner peripheral side with respect to the outer peripheral portion 44, and has a tapered shape that is gradually reduced in diameter from the lower end of the outer peripheral portion 44 upward.
- the tapered portion 45 of the present embodiment has an inclined surface 45 a that is inclined at an angle of about 45 degrees with respect to the axis of the spindle 32.
- the upper end opening of the tapered portion 45 forms a communication port 43.
- the partition member 27 is fitted into the fitting portion 14 of the lower case 12 from the inner peripheral side. Then, the flange portion 46 is positioned in contact with the upper end of the fitting portion 14 from above. As a result, the tapered portion 45 is disposed immediately below the lower holder 36 included in the rotor 31. Then, with the partition member 27 as a boundary, the storage chamber is partitioned into a lower storage chamber 41 and an upper storage chamber 42, and the lower storage chamber 41 and the upper storage chamber 42 communicate with each other through the communication port 43. That is, the partition member 27 forms a communication port 43 for guiding the blow-by gas in the lower storage chamber 41 to the upper storage chamber 42 around the spindle 32 at a height between the nozzle 37 and the separation disk 34.
- the lower storage chamber 41 functions as a primary separation chamber for mist oil.
- the PCV valve 28 includes a diaphragm 47, an upper spring 48, and a lower spring 49.
- the diaphragm 47 is a valve body, which is manufactured by molding rubber and resin, and is configured by a disk-shaped member that is slightly inclined downward from the central portion toward the peripheral portion.
- the upper spring 48 and the lower spring 49 are members for supporting the diaphragm 47 in a state in which the diaphragm 47 can move in the vertical direction. That is, the upper spring 48 is disposed at the center of the diaphragm 47 from above, and the lower spring 49 is disposed at the center of the diaphragm 47 from below.
- the diaphragm 47 is sandwiched between the upper spring 48 and the lower spring 49 so as to be supported so as to be movable in the vertical direction.
- the PCV valve 28 is disposed on the upper case 13. Specifically, it is arranged at a position directly below the upper surface cover 23 in a state of being placed on the pedestal 51.
- the pedestal 51 is airtightly covered with a diaphragm 47.
- a lower spring 49 is attached between the pedestal 51 and the diaphragm 47. Further, the space defined by the pedestal 51 and the diaphragm 47 is open to the atmosphere through the air communication part 52.
- an upper spring 48 is attached between the upper surface cover 23 and the diaphragm 47.
- the diaphragm 47 moves up and down according to the intake side pressure of the engine 4 and the internal pressure of the crankcase, and adjusts the flow of blow-by gas. That is, the diaphragm 47 moves to the gas discharge unit 25 side (upward) when the intake pressure (negative pressure) of the engine 4 is excessively large, and to the opposite side (downward) when the crankcase side pressure is high. Moving.
- the outer periphery of the pedestal 51 on which the PCV valve 28 is placed is partitioned by a side wall having a circular shape in plan view, and a communication window 53 is provided on the side wall.
- a communication window portion 53 By this communication window portion 53, a portion above the diaphragm 47 in the upper accommodation chamber 42 and a portion on the rotor 31 side are communicated with each other.
- a cylindrical rib 54 is provided below the side wall.
- the cylindrical rib 54 is a ring-shaped protrusion provided integrally with the main body cover 22 at a height above the rotor unit 21 and below the diaphragm 47.
- the cylindrical rib 54 guides fluid (oil or blow-by gas) flowing downward from the outer peripheral side to the inner peripheral side along the inner surface of the main body cover 22 at the upper end of the main body cover 22. Since the amount of oil can also be reduced by this cylindrical rib 54, the adhesion of oil to the PCV valve 28 can be suppressed at a high level.
- a cylindrical joint portion 19 protrudes upward in the internal space of the lower case 12.
- a part of the cylindrical member 17 is provided along the joint portion 19.
- the tubular member 17 is bent in an L shape in the middle, and the remaining portion is provided in parallel with the communication tubular portion 16.
- the cylindrical member 17 is provided immediately above the communicating cylinder portion 16, and an end portion thereof protrudes from the flange 18.
- the fixed frame 55 is a metal frame attached to the fitting portion 14 of the lower case 12 (see FIG. 4).
- the cylindrical member 17 has a blow-by gas introduction inlet side portion 17a projecting behind the flange 18 (right side in FIG. 9) and an introduction outlet side portion 17b in the vicinity of the joint portion 19 and fixed. It is arranged immediately below the frame 55.
- the opening width of the introduction outlet side portion 17 b is sufficiently wider than the width of the frame constituting the fixed frame 55.
- the opening area of the introduction outlet side portion 17b and the opening area of the outlet pipe 26 are aligned, and the blow-by gas flows smoothly.
- the blow-by gas discharged from the cylindrical member 17 flows upward through the fixed frame 55 and flows into the hollow portion of the rotor 31 from the rotation center side with respect to the locus of the injection holes 39.
- the introduction outlet side portion 17b of the cylindrical member 17 gas introduction portion
- the opening faces the lower side of the nozzle 37, specifically, as indicated by the dotted line X in FIG.
- the blow-by gas can be efficiently flowed into the hollow portion of the rotor 31 as long as it faces.
- the blow-by gas discharged from the cylindrical member 17 can be introduced into the upper storage chamber 42 from the rotation center side with respect to the locus of the injection hole 39 while suppressing the entrainment of the oil injected from the injection hole 39.
- the oil injected from the nozzle 37 (injection hole 39) is collected at the bottom of the lower housing chamber 41 together with the oil separated from the blow-by gas, and is returned to the engine 4 through the communication cylinder portion 16.
- the flow path of blow-by gas is partitioned by the cylindrical member 17, the flow of oil is hardly affected by the flow of blow-by gas.
- the oil supplied from the engine 4 to the joint portion 19 through the oil supply pipe 9 flows into the spindle shaft 33 as indicated by the arrow F1. Thereafter, the oil flows from the spindle shaft 33 into the nozzle body 38 and is injected from the injection hole 39 as indicated by the arrow F2.
- the rotor 31 and the spindle 32 rotate around the spindle shaft 33.
- the injected oil is sprayed onto the tapered portion 45 of the partition member 27 and is guided in the obliquely downward direction on the outer peripheral side along the inclined surface 45a of the tapered portion 45, as indicated by the arrow F3. Thereby, mixing of the oil splash into the blow-by gas can be suppressed. Thereafter, the oil flows down the inner surface of the lower case 12 toward the bottom of the lower storage chamber 41 as indicated by an arrow F4. Further, the oil flows into the communication cylinder portion 16 and is returned from the side surface of the engine 4 to the crankcase as indicated by an arrow F5.
- blow-by gas from the engine 4 is guided by the tubular member 17 as indicated by an arrow F11. Thereafter, as indicated by the arrow F12, the blow-by gas discharged from the inlet / outlet side portion 17b flows into the hollow portion of the rotor 31 through the inside of the movement locus of the injection hole 39. Since the cylindrical member 17 forms an independent flow path, the oil flow is hardly affected by the blow-by gas flow.
- blow-by gas that has flowed into the hollow portion of the rotor 31 moves through the gap between the separation disks 34 toward the outer periphery of the rotor 31 by the centrifugal force generated as the rotor 31 rotates, as indicated by the arrow F13.
- the pressure on the inner circumferential side of the rotor 31 becomes lower than the pressure on the outer circumferential side. This pressure difference makes it easier for the blow-by gas in the lower housing chamber 41 to flow into the hollow portion of the rotor 31, so that the inflow efficiency of the blow-by gas can be increased.
- the blow-by gas comes into contact with the separation disk 34, mist-like oil contained in the blow-by gas adheres to the surface of the separation disk 34. Then, another mist-like oil is combined with the attached mist-like oil, and the oil is aggregated on the surface of the separation disk 34. That is, the oil is secondarily separated.
- the blow-by gas is primarily separated from the mist-like oil in the lower housing chamber 41. For this reason, the mist oil is separated from the blow-by gas at a high level by the secondary separation in the separation disk 34.
- the upper storage chamber 42 corresponds to a secondary separation chamber that secondary-separates the remaining mist-like oil with respect to the blow-by gas after the mist-like oil is primarily separated.
- a gap SP is formed between the spindle 32 and the spindle shaft 33.
- This gap functions as an oil guide path and is filled with oil supplied to be ejected from the nozzle 37.
- the supply pressure of the oil is sufficiently high, a part of the oil filled in the gap is discharged from the upper end portion of the spindle 32 to the hollow portion of the rotor 31 through the upper end of the gap.
- the oil discharged into the hollow portion of the rotor 31 moves in the gap between the separation disks 34 in the outer circumferential direction of the rotor 31 by the centrifugal force of the rotor 31 as in the blow-by gas.
- the oil aggregated on the surface of the separation disk 34 is combined with the oil discharged into the hollow portion of the rotor 31. As a result, the surface of the separation disk 34 is cleaned, and maintenance for the separation disk 34 can be simplified. Oil agglomerated or coalesced on the surface of the separation disk 34 is discharged from the outer peripheral edge of the separation disk 34, collides with the inner surface of the main body cover 22, and then flows down the inner surface. Further, the oil merges with the oil injected from the nozzle 37 in the lower accommodation chamber 41 and is returned to the engine 4.
- the blow-by gas from which the mist-like oil has been separated after passing through the rotor 31 rises while turning around the gap between the inner surface of the upper case 13 and the rotor 31 in the upper storage chamber 42.
- the separated oil rises on the swirling flow of blow-by gas. Then, it flows down along the vertical ribs 24. Even if the oil flows from the outer peripheral side to the inner peripheral side along the inner surface of the main body cover 22, the oil can be dropped in the form of droplets by the cylindrical rib 54.
- the blowby gas from which the mist-like oil has been separated is guided to the space on the upper surface side of the PCV valve 28 as indicated by the arrows F14 and F15. Thereafter, as indicated by an arrow F ⁇ b> 16, the air is guided to the breather pipe 3 through the outlet pipe 26.
- the independent flow path for blow-by gas is formed by the cylindrical member 17, even if it inclines forward as shown, for example in FIG.
- the oil OL accumulated in the tank is not undulated by the flow of blow-by gas. Thereby, oil can be prevented from entering the rotor 31 side, and the gas purification performance can be maintained at a high level.
- the separation disk 34 is composed of a ring-shaped plate material that is inclined downward toward the outer peripheral side, so that the oil separated by the separation disk 34 flows downward. , It is possible to suppress oil from being mixed into the treated gas.
- the inflow side portion of the cylindrical member 17 gas inflow portion
- the communication cylinder portion 16 oil discharge portion
- the upper end portion of the joint portion 19 and the lower end portion of the spindle shaft 33 are supported by the fixed frame 55.
- the fixed frame 55 may be omitted. This is because the rigidity of the joint portion 19 is improved because the discharge side portion of the cylindrical member 17 (gas inflow portion) is provided integrally with the joint portion 19.
- the introduction inlet side portion 17a in the cylindrical member 17 ′ (gas inflow portion) is located at a position different from the communicating cylinder portion 16 (oil discharge portion) in the lower case 12, specifically May project forward from the front surface of the lower case 12.
- the protruding position of the introduction inlet side portion 17a is not limited to the front surface of the lower case 12, and may be either the left or right side surface.
- SYMBOLS 1 Closed-type crankcase ventilation system, 2 ... Oil separator, 3 ... Breather pipe, 4 ... Engine, 5 ... Intake side flow path, 6 ... Air filter, 7 ... Turbocharger, 8 ... Charge cooler, 9 ... Oil supply pipe , 11 ... Housing, 12 ... Lower case, 13 ... Upper case, 14 ... Lower case fitting part, 15 ... Lower end part of upper case, 16 ... Communication cylinder part, 17, 17 '... Cylindrical member, 17a ... inlet side portion of the cylindrical member, 17b ... inlet side portion of the cylindrical member, 18 ... flange, 19 ... joint portion, 21 ... rotor unit, 22 ... main body cover, 23 ...
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
Claims (7)
- 処理対象ガスに含まれるミスト状オイルを分離するオイルセパレータであって、
スピンドルと共に回転可能に設けられ、前記スピンドルの軸線方向に積層された複数枚の分離ディスクと、
前記スピンドルにおける前記分離ディスクよりも下側の周面から突設され、噴射孔からオイルを噴射させることで軸線を中心に前記スピンドルを回転させるノズルと、
前記処理対象ガスを導入するガス導入部、及び、オイルを排出させるオイル排出部が設けられた下側ケースと、
前記下側ケースに上方から取り付けられ、前記スピンドル、前記分離ディスク、及び前記ノズルが収容される収容室を、前記下側ケースと共に区画する上側ケースと、
前記収容室を、下側収容室と上側収容室とに区画し、かつ、前記下側収容室の前記処理対象ガスを前記上側収容室に案内する連通口を、前記ノズルと前記分離ディスクの間の高さにおける前記スピンドルの周囲に形成する区画部材とを有し、
前記ガス導入部は、
前記処理対象ガスの導入入口端部が、前記下側ケースの外に臨み、
前記処理対象ガスの導入出口端部が、前記ノズルの下側近傍に臨む筒状部材によって構成されていることを特徴とするオイルセパレータ。 - 前記スピンドルは、スピンドルシャフトによって回転可能に支持され、
前記下側ケースには、前記スピンドルシャフトの下端部が嵌合されるジョイント部が設けられ、
前記ガス導入部の導入出口側部分は、前記ジョイント部に沿って設けられていることを特徴とする請求項1に記載のオイルセパレータ。 - 前記スピンドルシャフトは、前記スピンドルの動力となるオイルを供給する円筒状部材によって構成され、
前記ジョイント部は、前記スピンドルシャフトに前記オイルを供給する筒状部材によって構成されていることを特徴とする請求項2に記載のオイルセパレータ。 - 前記処理対象ガスの導入出口端部は、前記噴射孔の高さから当該噴射孔の回転直径dだけ下方の高さ範囲内であって、1.5dの回転直径範囲内に臨んでいることを特徴とする請求項1~3の何れか1項に記載のオイルセパレータ。
- 前記区画部材は、外周側に向けて下り傾斜されたリング状の板材であって、下り傾斜面に前記噴射孔から噴射された前記オイルが吹き付けられることを特徴とする請求項1から4の何れか1項に記載のオイルセパレータ。
- 前記ガス導入部の導入入口側部分は、前記オイル排出部と並行に設けられていることを特徴とする請求項1から5の何れか1項に記載のオイルセパレータ。
- 前記ガス導入部の導入入口側部分は、前記下側ケースにおける前記オイル排出部とは異なる位置から、前記下側ケースよりも外側に突設されていることを特徴とする請求項1から5の何れか1項に記載のオイルセパレータ。
Priority Applications (4)
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US15/121,660 US20160375387A1 (en) | 2014-02-25 | 2014-02-25 | Oil separator |
PCT/JP2014/054426 WO2015128925A1 (ja) | 2014-02-25 | 2014-02-25 | オイルセパレータ |
EP14883775.0A EP3112032B1 (en) | 2014-02-25 | 2014-02-25 | Oil separator |
JP2016504875A JP6255476B2 (ja) | 2014-02-25 | 2014-02-25 | オイルセパレータ |
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PCT/JP2014/054426 WO2015128925A1 (ja) | 2014-02-25 | 2014-02-25 | オイルセパレータ |
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US (1) | US20160375387A1 (ja) |
EP (1) | EP3112032B1 (ja) |
JP (1) | JP6255476B2 (ja) |
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US11097285B2 (en) * | 2018-01-11 | 2021-08-24 | Kuhn Performance Technologies, Llc | Crankcase ventilation management devices, systems, and methods |
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CN108883424B (zh) * | 2016-04-06 | 2020-12-15 | 东京滤器株式会社 | 油分离器 |
DE202017100779U1 (de) * | 2017-02-14 | 2018-05-15 | Reinz-Dichtungs-Gmbh | Ölabscheider mit geteilter Antriebskammer |
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Also Published As
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US20160375387A1 (en) | 2016-12-29 |
JP6255476B2 (ja) | 2017-12-27 |
EP3112032A4 (en) | 2018-01-17 |
EP3112032A1 (en) | 2017-01-04 |
JPWO2015128925A1 (ja) | 2017-03-30 |
EP3112032B1 (en) | 2020-05-27 |
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