CN113790216A - Rotating shaft double-bearing supporting structure - Google Patents

Rotating shaft double-bearing supporting structure Download PDF

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Publication number
CN113790216A
CN113790216A CN202111108194.3A CN202111108194A CN113790216A CN 113790216 A CN113790216 A CN 113790216A CN 202111108194 A CN202111108194 A CN 202111108194A CN 113790216 A CN113790216 A CN 113790216A
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CN
China
Prior art keywords
bearing support
ring
oil
rotating shaft
bearing
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202111108194.3A
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Chinese (zh)
Inventor
王秋菊
邢彬
杨荣
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AECC Shenyang Engine Research Institute
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AECC Shenyang Engine Research Institute
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 AECC Shenyang Engine Research Institute filed Critical AECC Shenyang Engine Research Institute
Priority to CN202111108194.3A priority Critical patent/CN113790216A/en
Publication of CN113790216A publication Critical patent/CN113790216A/en
Pending legal-status Critical Current

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    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/08—Rigid support of bearing units; Housings, e.g. caps, covers for spindles
    • F16C35/12—Rigid support of bearing units; Housings, e.g. caps, covers for spindles with ball or roller bearings
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The application belongs to the technical field of engine main shaft support design, concretely relates to pivot duplex bearing structure, include: a rotating shaft; the ball bearing is sleeved on the rotating shaft; the rolling rod bearing is sleeved on the rotating shaft; the bearing support is provided with a ball bearing support ring and a rolling rod bearing support ring; the ball bearing support ring is sleeved on the ball bearing, is connected to the bearing support and has lower rigidity, and the inner wall of the ball bearing support ring is provided with a convex part; the roller bearing support ring is sleeved on the roller bearing and connected to the bearing support with higher rigidity, and the upper part of the roller bearing support ring forms an outer ring of the roller bearing; and the positioning nut is screwed in the ball bearing support ring and matched with the convex part on the inner wall of the ball bearing support ring to clamp the outer ring of the ball bearing.

Description

Rotating shaft double-bearing supporting structure
Technical Field
The application belongs to the technical field of engine spindle support design, and particularly relates to a rotating shaft double-bearing support structure.
Background
The bearing on the main shaft of the engine bears higher load, and in order to prolong the service life of the bearing on the main shaft of the engine, a bearing support form with parallel ball bearings and rolling rod bearings is adopted.
At present, a ball bearing on a main shaft of an engine is supported by an elastic support so that the ball bearing mainly bears axial force, the critical rotating speed of a rotor can be improved, and the rotor has higher margin; the roller bearing on the main shaft of the engine is supported by a rigid support so that the roller bearing mainly bears radial force, the support structure is simple in form, but lacks damping effect on a rotor vibration system and cannot effectively inhibit vibration of the engine, and in addition, the ball bearing and the roller bearing are lubricated and cooled by adopting a side-spraying lubricating oil form, so that the roller bearing is limited by a spatial structure, related parts are difficult to arrange, the lubricating oil is seriously wasted, and the use efficiency is low.
The present application has been made in view of the above-mentioned technical drawbacks.
It should be noted that the above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and the above background disclosure should not be used for evaluating the novelty and inventive step of the present application without explicit evidence to suggest that the above content is already disclosed at the filing date of the present application.
Disclosure of Invention
It is an object of the present application to provide a dual bearing support for a rotating shaft that overcomes or alleviates at least one of the technical disadvantages of the known prior art.
The technical scheme of the application is as follows:
a rotary shaft double bearing support structure comprising:
a rotating shaft;
the ball bearing is sleeved on the rotating shaft;
the rolling rod bearing is sleeved on the rotating shaft;
the bearing support is provided with a ball bearing support ring and a rolling rod bearing support ring; the ball bearing support ring is sleeved on the ball bearing, is connected to the bearing support and has lower rigidity, and the inner wall of the ball bearing support ring is provided with a convex part; the roller bearing support ring is sleeved on the roller bearing and connected to the bearing support with higher rigidity, and the upper part of the roller bearing support ring forms an outer ring of the roller bearing;
and the positioning nut is screwed in the ball bearing support ring and matched with the convex part on the inner wall of the ball bearing support ring to clamp the outer ring of the ball bearing.
According to at least one embodiment of the present application, in the above-mentioned dual bearing support structure for a rotating shaft, the bearing support has a support ring thereon;
the ball bearing support ring is positioned on the inner side of the support ring and is connected with the support ring through a support arm, and the support arm has lower rigidity;
the roller bearing support ring protrudes out of the support ring and is connected with the support ring through a support arm, and the support arm has higher rigidity.
According to at least one embodiment of the present application, the above-mentioned dual bearing support structure for a rotating shaft further includes:
the supporting seat is provided with a supporting hole;
the support hole is sleeved on the roller bearing support ring, and an annular gap is formed between the support hole and the roller bearing support ring; oil is filled in the annular gap.
According to at least one embodiment of the present application, in the above-mentioned dual-bearing supporting structure for a rotating shaft, the supporting seat is connected to the bearing support.
According to at least one embodiment of the present application, in the above-mentioned dual-bearing supporting structure for a rotating shaft, the supporting seat has an oil injection channel therein;
one end of the oil injection channel extends to the annular gap, the other end of the oil injection channel extends to the outer surface of the supporting seat, and the oil injection channel is provided with an oil injection nozzle.
According to at least one embodiment of the present application, in the above-mentioned dual-bearing supporting structure for a rotating shaft, two annular sealing grooves are formed between the supporting hole and the roller bearing supporting ring; the annular gap is positioned between the two annular sealing grooves;
the pivot duplex bearing support structure of (1) still includes:
and each annular sealing ring is correspondingly arranged in one annular sealing groove.
According to at least one embodiment of the present application, the above-mentioned dual bearing support structure for a rotating shaft further includes:
and the elastic ring is arranged in the annular gap.
According to at least one embodiment of the present application, in the above-mentioned dual-bearing supporting structure for a rotating shaft, the elastic ring has a circumferential stopping opening;
a circumferential stopping protrusion is arranged on the inner part of the annular gap; the circumferential stopping protrusion is caught in the circumferential stopping opening.
According to at least one embodiment of the present application, in the above-mentioned dual bearing support structure for a rotating shaft, the rotating shaft has a bearing positioning protrusion;
pivot duplex bearing support structure still includes:
the first distance sleeve is sleeved on the rotating shaft and matched with the bearing positioning protrusion to clamp the inner ring of the ball bearing along the axial direction;
the second distance sleeve is sleeved on the rotating shaft and matched with the first distance sleeve to clamp the inner ring of the roller bearing along the axial direction;
and the positioning bolt is screwed on the rotating shaft and compresses the second distance sleeve.
According to at least one embodiment of the present application, in the above-mentioned dual bearing support structure for a rotating shaft, a shaft cavity is provided in the rotating shaft, and an opening is formed at one end of the rotating shaft, which is close to the ball bearing; the inner wall of the shaft cavity is provided with a first annular oil collecting groove and a second annular oil collecting groove;
the rotating shaft is provided with a first oil through hole and a second oil through hole; the first oil through hole is communicated with the first annular oil collecting groove and inclines to the opening part on the rotating shaft; the second oil through hole is communicated with the second annular oil collecting groove and inclines to the opening part on the rotating shaft;
the ball bearing inner ring is provided with a first oil inlet hole; the first oil inlet hole is communicated with the first oil through hole;
an annular oil storage cavity is formed between the inner ring of the roller bearing and the rotating shaft; the annular oil storage cavity is communicated with the second oil through hole;
a second oil inlet hole is formed in the inner ring of the rolling rod bearing; the second oil inlet hole is communicated with the annular oil storage cavity;
pivot duplex bearing support structure still includes:
an oil collecting ring connected to the opening of the rotating shaft;
and the oil spray nozzle is arranged right opposite to the oil collecting ring.
Drawings
Fig. 1 is a schematic view of a dual bearing support structure of a rotating shaft according to an embodiment of the present disclosure;
wherein:
1-a rotating shaft; 2-ball bearings; 3-a roller bearing; 4-bearing support; 5-ball bearing support ring; 6-rolling rod bearing support ring; 7-positioning the screw cap; 8-a support ring; 9-a support seat; 10-an oil injection nozzle; 11-ring seal ring; 12-an elastic ring; 13-a first distance sleeve; 14-a second distance sleeve; 15-positioning bolts; 16-an oil-collecting ring; 17-oil spray nozzle.
For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; further, the drawings are for illustrative purposes, and terms describing positional relationships are limited to illustrative illustrations only and are not to be construed as limiting the patent.
Detailed Description
In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the present application will be further clearly and completely described in the following detailed description with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only some of the embodiments of the present application, and are only used for explaining the present application, but not limiting the present application. It should be noted that, for convenience of description, only the parts related to the present application are shown in the drawings, other related parts may refer to general designs, and the embodiments and technical features in the embodiments in the present application may be combined with each other to obtain a new embodiment without conflict.
In addition, unless otherwise defined, technical or scientific terms used in the description of the present application shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, which indicate orientations, are used only to indicate relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly, and thus, should not be construed as limiting the present application. The use of "first," "second," "third," and the like in the description of the present application is for descriptive purposes only to distinguish between different components and is not to be construed as indicating or implying relative importance. The use of the terms "a," "an," or "the" and similar referents in the context of describing the application is not to be construed as an absolute limitation on the number, but rather as the presence of at least one. The word "comprising" or "comprises", and the like, when used in this description, is intended to specify the presence of stated elements or items, but not the exclusion of other elements or items.
Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.
The present application is described in further detail below with reference to fig. 1.
A rotary shaft double bearing support structure comprising:
a rotating shaft 1;
the ball bearing 2 is sleeved on the rotating shaft 2;
the roller bearing 3 is sleeved on the rotating shaft 2;
the bearing support 4 is provided with a ball bearing support ring 5 and a rolling rod bearing support ring 6; wherein, the ball bearing support ring 5 is sleeved on the ball bearing 2, is connected on the bearing support 4 and has smaller rigidity, and the inner wall of the ball bearing support ring is provided with a convex part; the roller bearing support ring 6 is sleeved on the roller bearing 3, is connected on the bearing support 4 and has higher rigidity, and the upper part of the roller bearing support ring forms the outer ring of the roller bearing 3;
and the positioning nut 7 is screwed in the ball bearing support ring 5 and is matched with the convex part on the inner wall of the ball bearing support ring 5 to clamp the outer ring of the ball bearing 2, so that the ball bearing 2 is positioned in the ball bearing support ring 5.
For the rotating shaft double-bearing supporting structure disclosed in the above embodiments, those skilled in the art can understand that the rotating shaft 1 can be an engine main shaft, that is, can be used as a supporting structure of the engine main shaft, the ball bearing 2 and the roller bearing 3 are sleeved on the rotating shaft 1, the ball bearing support ring 5 on the bearing support 4 is designed to be sleeved on the ball bearing 2, and has a smaller rigidity with the bearing support 4, so as to provide a larger elastic support for the ball bearing 2, so that the ball bearing 2 mainly bears an axial force, so as to increase the critical rotating speed of the rotor, so that the rotor has a higher margin, and the roller bearing support ring 6 on the bearing support 4 is sleeved on the roller bearing 3, so as to have a larger rigidity with the bearing support 4, so as to provide a smaller elastic support for the roller bearing 3, so that the roller bearing 3 can have a certain damping effect on the roller bearing 3 while mainly bearing a radial force, thereby effectively suppressing the vibration of the engine.
For the rotating shaft double-bearing supporting structure disclosed in the above embodiment, it can be further understood by those skilled in the art that the rigidity of the ball bearing support ring 5 and the roller bearing support ring 6 connected to the bearing support 4 can be set according to the concrete practice by the related technical personnel when applying the technical scheme disclosed in the present application, and the ball bearing 2 mainly bears the axial force and the roller bearing 3 mainly bears the radial force through reasonable rigidity distribution ratio design, and can have a certain damping effect on the roller bearing 3 to effectively suppress the vibration of the engine.
With regard to the dual bearing support structure for a rotating shaft disclosed in the above embodiments, it can be understood by those skilled in the art that the ball bearing support ring 5 and the roller bearing support ring 6 are connected to the bearing support 4 as an integral structure, which can reduce the number of components required for connection, reduce the weight, and ensure the stability between the structures, on the one hand, and can enable different forms of vibration coupling between the ball bearing support ring 5 and the roller bearing support ring 6 to further suppress the vibration of the engine.
For the rotating shaft double-bearing supporting structure disclosed in the above embodiment, it can be understood by those skilled in the art that the roller bearing support ring 6 is designed to be sleeved on the roller bearing 3, and the upper part of the roller bearing support ring forms the outer ring of the roller bearing 3, that is, the ball bearing support ring 5 and the outer ring of the ball bearing 2 are integrally formed, or the ball bearing support ring 5 itself forms the outer ring of the ball bearing 2, on one hand, the components required for connection can be reduced, the weight can be reduced, and the stability between the structures can be ensured, and on the other hand, the damage caused by the micro-motion friction between the ball bearing support ring 5 and the outer ring of the ball bearing 2 can be avoided.
In some alternative embodiments, in the above-mentioned dual-bearing supporting structure for a rotating shaft, the bearing support 4 has a supporting ring 8 thereon;
the ball bearing support ring 5 is positioned on the inner side of the support ring 8 and is connected with the support ring 7 through a support arm, and the support arm has lower rigidity;
the roller bearing support ring 6 protrudes out of the support ring 8 and is connected with the support ring 7 through a support arm, and the support arm has higher rigidity.
In some optional embodiments, the above dual bearing support structure for a rotating shaft further includes:
a support base 9 having a support hole thereon;
the support hole is sleeved on the roller bearing support ring 6, and an annular gap is formed between the support hole and the roller bearing support ring 6; oil is filled in the annular gap.
For the rotating shaft double-bearing supporting structure disclosed in the above embodiment, it can be further understood by those skilled in the art that the supporting seat 9 is used to support the roller bearing supporting ring 6 at the outer side, an annular gap filled with oil is formed between the supporting seat and the roller bearing supporting ring 6, and the oil can form an extrusion oil film in the annular gap, so that on one hand, the roller bearing 3 can be ensured to mainly bear the action of radial force, and on the other hand, the roller bearing supporting ring 6 and the roller bearing 3 can be further damped, so as to enhance the suppression effect on the starting vibration.
In some alternative embodiments, in the above-mentioned dual bearing support structure for a rotating shaft, the supporting seat 9 is connected to the bearing support 4, and particularly, may be connected to the supporting ring 7 of the bearing support 4, so as to be connected with the bearing support 4 as a whole, and has high stability, and the connection portion therebetween may be connected to the engine casing by bolts.
In some alternative embodiments, in the above-mentioned pivot double-bearing support structure, the supporting seat 9 has an oil injection channel therein;
oiling passageway one end extends to the annular gap, and the other end extends to the surface of supporting seat 9, and this end is provided with the glib talker 10 to can be through the oiling passageway for annular gap supplementary fluid through glib talker 10.
In some optional embodiments, in the above-mentioned dual-bearing supporting structure for a rotating shaft, two annular sealing grooves are formed between the supporting hole and the roller bearing supporting ring 6; the annular gap is positioned between the two annular sealing grooves;
the pivot duplex bearing support structure of (1) still includes:
two ring seal 11, every ring seal 8 corresponds sets up in an annular seal groove to prevent that the fluid in the annular gap from leaking.
In some optional embodiments, the above dual bearing support structure for a rotating shaft further includes:
and the elastic ring 12 is arranged in the annular gap.
For the rotating shaft double-bearing supporting structure disclosed in the above embodiment, as can be understood by those skilled in the art, the elastic ring 12 is disposed in the annular gap, on one hand, the elastic ring can be matched with the ball bearing supporting ring 5 having a larger elastic supporting function to adjust the critical rotation speed of the rotor, so as to increase the critical rotation speed of the rotor, so that the rotor has a higher margin, and on the other hand, the elastic ring can play a damping role between the supporting seat 9 and the rolling rod bearing supporting ring 6, so as to further enhance the effect of suppressing the vibration of the engine.
For the dual-bearing supporting structure of a rotating shaft disclosed in the above embodiments, it can be understood by those skilled in the art that if only the annular gap is filled with oil to form an extrusion oil film, under the conditions of improper structural design, poor manufacturing or unbalanced deterioration of a rotor system, the nonlinearity of the extrusion oil film force can be greatly increased, at this time, even a small unbalance amount can generate a large external force transfer to cause the occurrence of a bistable state characteristic and cause unstable vibration, which cannot effectively damp the vibration of an engine, but can greatly endanger the safe operation of the engine, the elastic ring 12 is arranged in the annular gap and coupled with the extrusion oil film to improve the high nonlinearity of the extrusion oil film force, expand the linear region of the extrusion oil film force, and effectively avoid the occurrence of the bistable state characteristic under the conditions of improper structural design, poor manufacturing or unbalanced deterioration of the rotor system, the vibration of the engine can be effectively inhibited, and the safe operation of the engine is ensured.
In some alternative embodiments, in the above-mentioned dual bearing support structure for a spindle, the elastic ring 12 has a circumferential stopping opening;
a circumferential stopping protrusion is arranged on the inner part of the annular gap; the circumferential stopping protrusion is clamped in the circumferential stopping opening, so that the damping ring 12 can be limited from rotating circumferentially in an annular gap, the distribution of an extrusion oil film flow field can be ensured, the damping generated by deformation coupling of the damping ring 12 and the extrusion oil film can effectively reduce the vibration of the rotor system and the vibration of the external transmission.
In some alternative embodiments, in the above-mentioned dual bearing support structure for a rotating shaft, the rotating shaft 1 has a bearing positioning protrusion thereon;
pivot duplex bearing support structure still includes:
the first distance sleeve 13 is sleeved on the rotating shaft 1 and matched with the bearing positioning protrusion to clamp the inner ring of the ball bearing 2 along the axial direction;
the second distance sleeve 14 is sleeved on the rotating shaft 1 and matched with the first distance sleeve 13 to clamp the inner ring of the roller bearing 3 along the axial direction;
and the positioning bolt 15 is screwed on the rotating shaft 1 and compresses the second distance sleeve 14.
In some alternative embodiments, in the above-mentioned dual bearing supporting structure for a rotating shaft, the rotating shaft 1 has a shaft cavity therein, and an opening is formed at one end of the rotating shaft, which is close to the ball bearing 1; the inner wall of the shaft cavity is provided with a first annular oil collecting groove and a second annular oil collecting groove;
the rotating shaft 1 is provided with a first oil through hole and a second oil through hole; the first oil through hole is communicated with the first annular oil collecting groove and inclines to the opening part on the rotating shaft 1; the second oil through hole is communicated with the second annular oil collecting groove and inclines to the opening part on the rotating shaft 1;
the inner ring of the ball bearing 2 is provided with a first oil inlet hole; the first oil inlet hole is communicated with the first oil through hole;
an annular oil storage cavity is formed between the inner ring of the roller bearing 3 and the rotating shaft 1; the annular oil storage cavity is communicated with the second oil through hole;
a second oil inlet hole is formed in the inner ring of the roller bearing 3; the second oil inlet hole is communicated with the annular oil storage cavity;
pivot duplex bearing support structure still includes:
an oil collecting ring 16 connected to an opening of the rotating shaft 1;
and the oil injection nozzle 17 is arranged opposite to the oil receiving ring 16.
For the rotating shaft double-bearing supporting structure disclosed in the above embodiment, as can be understood by those skilled in the art, the lubricating oil sprayed by the oil nozzle 17 can enter the shaft cavity through the oil receiving ring 16, a part of the lubricating oil entering the shaft cavity can flow into the ball bearing 2 through the first annular oil collecting groove, the first oil through hole and the first oil inlet hole under the action of centrifugal force to lubricate and cool the ball bearing 2, and the other part of the lubricating oil can flow into the roller bearing 3 through the second annular oil collecting groove, the second oil through hole, the annular oil storage cavity and the second oil inlet hole under the action of centrifugal force to lubricate and cool the roller bearing 3.
For the rotating shaft double-bearing supporting structure disclosed in the above embodiment, it can be further understood by those skilled in the art that the first oil through hole and the second oil through hole in the rotating shaft 1 are designed to be inclined toward the opening part in the rotating shaft 1, that is, the openings of the first oil through hole and the second oil through hole are designed to face the flowing direction of the lubricating oil sprayed into the shaft cavity by the oil spray nozzle 17 via the oil collecting ring 16, so that the lubricating oil in the shaft cavity can be easily introduced into the ball bearing 2 and the rolling rod bearing 3, and the lubricating and cooling effects on the ball bearing 2 and the rolling rod bearing 3 are ensured.
With regard to the dual bearing support structure of the rotating shaft disclosed in the above embodiment, it can be understood by those skilled in the art that the second annular oil collecting groove is relatively far from the distance at which the oil nozzle 17 directly sprays the lubricating oil into the shaft cavity through the oil collecting ring 16, and an annular oil storage cavity is provided between the second oil through hole and the second oil inlet hole, and can store part of the lubricating oil, and when the oil supply of the lubricating oil fluctuates, the part of the lubricating oil can ensure the supply of the lubricating oil to the rolling rod bearing (3).
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.

Claims (10)

1. A rotary shaft double bearing support structure, comprising:
a rotating shaft (1);
the ball bearing (2) is sleeved on the rotating shaft (2);
the rolling rod bearing (3) is sleeved on the rotating shaft (2);
the bearing support (4) is provided with a ball bearing support ring (5) and a rolling rod bearing support ring (6); the ball bearing support ring (5) is sleeved on the ball bearing (2), is connected to the bearing support (4) and has lower rigidity, and the inner wall of the ball bearing support ring is provided with a convex part; the roller bearing support ring (6) is sleeved on the roller bearing (3) and connected to the bearing support (4) to have higher rigidity, and the upper part of the roller bearing support ring forms an outer ring of the roller bearing (3);
and the positioning nut (7) is screwed in the ball bearing support ring (5) and is matched with a convex part on the inner wall of the ball bearing support ring (5) to clamp the outer ring of the ball bearing (2).
2. The rotary shaft double bearing support structure according to claim 1,
the bearing support (4) is provided with a support ring (8);
the ball bearing support ring (5) is positioned on the inner side of the support ring (8) and is connected with the support ring (7) through a support arm, and the support arm has lower rigidity;
the roller bearing support ring (6) protrudes out of the support ring (8) and is connected with the support ring (7) through a support arm, and the support arm has higher rigidity.
3. The rotary shaft double bearing support structure according to claim 1,
further comprising:
a support base (9) having a support hole thereon;
the support hole is sleeved on the roller bearing support ring (6), and an annular gap is formed between the support hole and the roller bearing support ring (6); and oil liquid is filled in the annular gap.
4. The rotary shaft double bearing support structure according to claim 3,
the supporting seat (9) is connected to the bearing support (4).
5. The rotary shaft double bearing support structure according to claim 3,
an oil injection channel is arranged in the supporting seat (9);
one end of the oil injection channel extends to the annular gap, the other end of the oil injection channel extends to the outer surface of the supporting seat (9), and an oil injection nozzle (10) is arranged at the end of the oil injection channel.
6. The rotary shaft double bearing support structure according to claim 3,
two annular seal grooves are formed between the support hole and the roller bearing support ring (6); the annular gap is positioned between the two annular sealing grooves;
pivot duplex bearing support structure still include:
two ring seal (11), every ring seal (8) correspond and set up in an annular seal groove.
7. The rotary shaft double bearing support structure according to claim 3,
further comprising:
an elastic ring (12) disposed within the annular gap.
8. The rotary shaft double bearing support structure according to claim 7,
the elastic ring (12) is provided with a circumferential stopping opening;
a circumferential stopping protrusion is arranged on the inner part of the annular gap; the circumferential stopping protrusion is caught in the circumferential stopping port.
9. The rotary shaft double bearing support structure according to claim 1,
the rotating shaft (1) is provided with a bearing positioning protrusion;
pivot duplex bearing support structure still includes:
the first distance sleeve (13) is sleeved on the rotating shaft (1) and matched with the bearing positioning protrusion to clamp the inner ring of the ball bearing (2) along the axial direction;
the second distance sleeve (14) is sleeved on the rotating shaft (1) and matched with the first distance sleeve (13) to clamp the inner ring of the roller bearing (3) along the axial direction;
and the positioning bolt (15) is screwed on the rotating shaft (1) and compresses the second distance sleeve (14).
10. The rotary shaft double bearing support structure according to claim 1,
the rotating shaft (1) is internally provided with a shaft cavity, and an opening is formed at one end of the rotating shaft, and the end is close to the ball bearing (1); the inner wall of the shaft cavity is provided with a first annular oil collecting groove and a second annular oil collecting groove;
the rotating shaft (1) is provided with a first oil through hole and a second oil through hole; the first oil through hole is communicated with the first annular oil collecting groove and inclines to the opening part on the rotating shaft (1); the second oil through hole is inclined towards the opening part on the rotating shaft (1), is communicated with the second annular oil collecting groove and is inclined towards the opening part on the rotating shaft (1);
a first oil inlet hole is formed in the inner ring of the ball bearing (2); the first oil inlet hole is communicated with the first oil through hole;
an annular oil storage cavity is formed between the inner ring of the roller bearing (3) and the rotating shaft (1); the annular oil storage cavity is communicated with the second oil through hole;
a second oil inlet hole is formed in the inner ring of the roller bearing (3); the second oil inlet is communicated with the annular oil storage cavity;
pivot duplex bearing support structure still includes:
an oil collecting ring (16) connected to an opening of the rotating shaft (1);
and the oil injection nozzle (17) is arranged right opposite to the oil collecting ring (16).
CN202111108194.3A 2021-09-22 2021-09-22 Rotating shaft double-bearing supporting structure Pending CN113790216A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115355260A (en) * 2022-08-14 2022-11-18 中国航发沈阳发动机研究所 A supplementary mechanism that maintains of axis for membrane disc shaft coupling

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Publication number Priority date Publication date Assignee Title
US20100027930A1 (en) * 2008-07-31 2010-02-04 General Electric Company Nested bearing cages
US20130108440A1 (en) * 2011-11-01 2013-05-02 General Electric Company Series bearing support apparatus for a gas turbine engine
CN105443587A (en) * 2014-08-29 2016-03-30 中航商用航空发动机有限责任公司 Integrated bearing supporting structure used for aviation engine
CN112081831A (en) * 2020-09-15 2020-12-15 中国航发沈阳发动机研究所 Bearing cooling structure
CN112855776A (en) * 2021-02-04 2021-05-28 中国航发沈阳发动机研究所 Ball rolling rod duplex bearing structure
CN112943901A (en) * 2021-02-05 2021-06-11 中国航发沈阳发动机研究所 Gear transmission structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100027930A1 (en) * 2008-07-31 2010-02-04 General Electric Company Nested bearing cages
US20130108440A1 (en) * 2011-11-01 2013-05-02 General Electric Company Series bearing support apparatus for a gas turbine engine
CN105443587A (en) * 2014-08-29 2016-03-30 中航商用航空发动机有限责任公司 Integrated bearing supporting structure used for aviation engine
CN112081831A (en) * 2020-09-15 2020-12-15 中国航发沈阳发动机研究所 Bearing cooling structure
CN112855776A (en) * 2021-02-04 2021-05-28 中国航发沈阳发动机研究所 Ball rolling rod duplex bearing structure
CN112943901A (en) * 2021-02-05 2021-06-11 中国航发沈阳发动机研究所 Gear transmission structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115355260A (en) * 2022-08-14 2022-11-18 中国航发沈阳发动机研究所 A supplementary mechanism that maintains of axis for membrane disc shaft coupling

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