CN112013019B

CN112013019B - Roller bearing assembly and aircraft engine

Info

Publication number: CN112013019B
Application number: CN201910467026.XA
Authority: CN
Inventors: 李佳琪; 沈洁阳; 占锐; 王军
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2022-04-01
Anticipated expiration: 2039-05-31
Also published as: CN112013019A

Abstract

The invention aims to provide a roller bearing assembly and an aircraft engine. The outer surface of a roller of the roller bearing assembly is provided with a roller oil throwing groove, the outer surface of the retainer is provided with a retainer oil throwing groove, the extending direction of the roller oil throwing groove from the upstream end to the downstream end is the direction from the axial center of the roller to the axial end surface of the roller, and the extending direction of the retainer oil throwing groove from the upstream end to the downstream end is the direction from the axial edge of the pocket to the axial end surface of the retainer; the downstream end of the roller oil throwing groove is positioned at the position of the upstream end of the roller oil throwing groove in the clockwise direction; the downstream end of the retainer oil throwing groove is positioned at the position of the upstream end of the retainer oil throwing groove in the clockwise direction; or the downstream end of the roller oil throwing groove is positioned at the position of the upstream end of the roller oil throwing groove in the anticlockwise direction by taking the circumferential direction of the roller as a reference; and the downstream end of the retainer oil throwing groove is positioned at the position of the upstream end of the retainer oil throwing groove in the anticlockwise direction by taking the circumferential direction of the retainer as a reference.

Description

Roller bearing assembly and aircraft engine

Technical Field

The invention relates to a roller bearing assembly and an aircraft engine.

Background

The aero-engine develops towards the direction of large thrust-weight ratio, high reliability, high durability, low oil consumption and the like. The bearing cavity and the roller bearing are important parts of an aircraft engine and have important influence on the reliable working performance and reliability of the engine. With the further increase of the rotating speed of the aircraft engine, the design and the operating state of the bearing cavity, the roller and the accessories of the aircraft engine are of great importance in order to improve the service life and the efficiency of the aircraft engine.

As shown in fig. 1, a roller bearing assembly 1 of an aircraft engine 900 is a key component for normal operation of the aircraft engine 900, and is disposed between a journal and a bearing housing of the aircraft engine for supporting a rotor. As the speed of the aircraft engine 900 increases, heat is generated by friction between the rollers 10 of the roller bearing assembly 1 and the raceways of the inner and

outer rings

11, 12, and the temperature rises sharply, causing the roller bearing assembly 1 to heat up. Under such conditions, if the lubricant inside the roller bearing assembly 1 cannot timely remove heat from the roller bearing assembly 1, the temperature of the roller bearing assembly 1 will further increase, the performance of the bearing will decrease, and even the bearing will fail, thereby affecting the working performance and the service life of the engine.

The roller bearing structure of the prior aero-engine has the following defects: as shown in fig. 2, a part of the lubricating oil between the raceway wall surface of the inner ring 11 and the cage 13 flows out through both inner ring side ends, and the other part flows onto the raceway of the outer ring 12 through the minute gaps between the rollers and the pockets, and finally flows out from both outer ring 12 side ends. Since the amount of the lubricating oil passing through the pocket gaps of the cage 13 is small, the lubricating oil flow and the heat exchange capability in the vicinity of the cage 13 are weak, and in this case, some of the lubricating oil inevitably accumulates on the raceway wall surface of the inner ring 11, while the lubricating oil flowing through the raceway wall surface of the outer ring 12 and the outer wall surface of the cage 13 is small. Therefore, it can be found that in the current aircraft engine, the heat dissipation capability of the roller bearing assembly 1 is weak, especially when the aircraft engine 900 is in rapid acceleration, rapid deceleration or other special working conditions for a long time, it is more likely to cause the lubricating oil to accumulate between the raceway wall surface of the inner ring 11 and the retainer 13, resulting in that the generated heat cannot be taken away by the lubricating oil in time, and further resulting in the temperature rise of the roller bearing assembly 1, and meanwhile, the raceway wall surface of the outer ring 12, due to less lubricating oil, has poor cooling capability, and will directly result in the performance degradation of the bearing, thereby further causing the performance degradation of the engine, even damaging the engine.

Disclosure of Invention

The invention aims to provide a roller bearing assembly which has the advantage of good heat dissipation effect.

The invention also aims to provide an aircraft engine which comprises the roller bearing assembly.

To achieve the object, a roller bearing assembly includes an inner race, rollers, a cage, and an outer race; the cage has pockets, an inner cage surface and an outer cage surface;

the inner ring and the outer ring are respectively arranged on the inner side and the outer side of the retainer; the inner surface of the retainer is opposite to the outer wall surface of the inner ring, and an inner ring gap is defined; the outer surface of the retainer is opposite to the inner wall surface of the outer ring, and an outer ring gap is limited; the pocket hole penetrates through the retainer and is communicated with the inner ring gap and the outer ring gap; the rollers are rotatably disposed in the pockets and sandwiched by the inner race and the outer race;

the outer surface of the roller is provided with a roller oil throwing groove, and the outer surface of the retainer is provided with a retainer oil throwing groove;

an extending direction of the roller oil slinger from the upstream end to the downstream end is a direction from an axial center of the roller to an axial end face of the roller, and an extending direction of the cage oil slinger from the upstream end to the downstream end is a direction from an axial edge of the pocket to an axial end face of the cage;

wherein, with the circumferential direction of the roller as a reference, the downstream end of the roller oil slinger is positioned at the position of the upstream end of the roller oil slinger in the clockwise direction; and the downstream end of the retainer oil throwing groove is positioned at the position of the upstream end of the retainer oil throwing groove in the clockwise direction by taking the circumferential direction of the retainer as a reference; or

The downstream end of the roller oil throwing groove is positioned at the position of the upstream end of the roller oil throwing groove in the anticlockwise direction by taking the circumferential direction of the roller as a reference; and a downstream end of the retainer oil slinger is positioned in a position counterclockwise of an upstream end of the retainer oil slinger with reference to the circumferential direction of the retainer.

In one embodiment, the roller slinger comprises a left roller slinger and a right roller slinger;

the leftward roller oil slinger and the rightward roller oil slinger extend from the axial center of the roller toward the end surfaces of the two axial sides of the roller, respectively.

In one embodiment, the leftward roller oil slinger and the rightward roller oil slinger are symmetrically arranged about an axially central outer circle of the roller, the plane of the axially central outer circle being perpendicular to the rotational axis of the roller.

In one embodiment, the roller oil slinger is in the shape of a three-dimensional spiral.

In one embodiment, the cage slinger comprises a left cage slinger and a right cage slinger;

the left retainer oil throwing groove and the right retainer oil throwing groove respectively extend from the edges of the two axial sides of the pocket towards the end faces of the two axial sides of the retainer.

In one embodiment, the leftward cage slinger oil groove and the rightward cage slinger oil groove are symmetrically disposed about an axially central cross-section of the cage that is perpendicular to a central axis of the cage.

In one embodiment, the cage oil slinger is in the shape of a two-dimensional spiral.

In one embodiment, the cage further has an oil through hole; the oil through hole penetrates through the retainer and is communicated with the inner ring gap and the outer ring gap.

In one embodiment, a plurality of the oil passing holes and a plurality of the pockets are provided at intervals in a circumferential direction of the cage.

In one embodiment, the diameter of the oil passage hole is the same as the width of the roller in the axial direction.

In one embodiment, the left roller dump groove comprises a first left roller dump groove and a second left roller dump groove; the right roller oil slinger comprises a first right roller oil slinger and a second right roller oil slinger;

wherein, with the axial direction of the rollers as a reference, the first leftward roller oil slinger is arranged on the left side of the second leftward roller oil slinger, and the second rightward roller oil slinger is arranged on the right side of the first rightward roller oil slinger;

the first leftward roller oil slinger groove and the second rightward roller oil slinger groove are symmetrically arranged around the axial central excircle of the roller; the second leftward roller oil throwing groove and the first rightward roller oil throwing groove are symmetrically arranged around the axial center excircle of the roller.

In one embodiment, the left cage dump slots comprise a first left cage dump slot, a second left cage dump slot, and a third left cage dump slot; the right retainer oil throwing groove comprises a first right retainer oil throwing groove, a second right retainer oil throwing groove and a third right retainer oil throwing groove;

the first leftward retainer oil slinger groove and the first rightward retainer oil slinger groove are symmetrically arranged about an axial central cross section of the retainer, the second leftward retainer oil slinger groove and the second rightward retainer oil slinger groove are symmetrically arranged about an axial central cross section of the retainer, and the third leftward retainer oil slinger groove and the third rightward retainer oil slinger groove are symmetrically arranged about an axial central cross section of the retainer;

the first leftward retainer oil throwing groove, the second leftward retainer oil throwing groove and the third leftward retainer oil throwing groove are sequentially arranged along the circumferential direction of the retainers; first right holder gets rid of the oil groove to the right holder of second get rid of the oil groove with the right holder of third direction gets rid of the oil groove and follows the circumference of holder sets gradually.

In one embodiment, the start of the upstream end of the first left cage oil slinger and the start of the upstream end of the first right cage oil slinger lie on a same straight line, and the straight line is collinear with the axial centerline of the pocket.

In one embodiment, the roller bearing assembly further comprises an oil slinger; the oil throwing baffle lug is convexly arranged on the end face of the retainer, is annular and is arranged on the same center line with the retainer.

In one embodiment, the roller oil slinger forms a first included angle with a plane of an axially central excircle of the roller; the retainer oil throwing groove and the plane of the axial central excircle of the roller form a second included angle; the first included angle is equal to the second included angle.

In one embodiment, the roller oil slinger forms a first included angle with a plane in which an axially central outer circle of the roller is located, the first included angle being in a range of 30 ° to 50 °.

In one embodiment, the length of the second left roller dump groove and the first right roller dump groove is half the length of the first left roller dump groove and the second right roller dump groove.

An aircraft engine for achieving the stated object comprises a roller bearing assembly as described above.

The positive progress effects of the invention are as follows: the invention provides a roller bearing assembly, wherein a roller oil throwing groove is arranged on the outer surface of a roller, a retainer oil throwing groove is arranged on the outer surface of a retainer, the extending direction of the roller oil throwing groove from the upstream end to the downstream end is the direction from the axial center of the roller to the axial end surface of the roller, and the extending direction of the retainer oil throwing groove from the upstream end to the downstream end is the direction from the axial edge of a pocket to the axial end surface of the retainer; the downstream end of the roller oil throwing groove is positioned at the position of the upstream end of the roller oil throwing groove in the clockwise direction by taking the circumferential direction of the roller as a reference; and the downstream end of the retainer oil throwing groove is positioned at the position of the upstream end of the retainer oil throwing groove in the clockwise direction by taking the circumferential direction of the retainer as a reference; or the downstream end of the roller oil throwing groove is positioned at the position of the upstream end of the roller oil throwing groove in the anticlockwise direction by taking the circumferential direction of the roller as a reference; and the downstream end of the retainer oil throwing groove is positioned at the position of the upstream end of the retainer oil throwing groove in the anticlockwise direction by taking the circumferential direction of the retainer as a reference.

The extending direction of the oil throwing groove and the extending direction of the oil throwing groove of the retainer and the mutual position relation of the oil throwing groove of the roller make the flowing direction of the lubricating oil smoother and not experience larger bending, so that the lubricating oil can be quickly thrown out of the bearing along the respective direction from the upstream end to the downstream end under the action of centrifugal force, and the technical effect of quickly radiating the roller bearing assembly is achieved.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic illustration of an aircraft engine;

FIG. 2 is a cross-sectional view of a prior art roller bearing assembly;

FIG. 3 is a cross-sectional view of a prior art roller and cage;

FIG. 4 is a schematic view of a roller and cage in one embodiment of the invention;

FIG. 5 is an enlarged view of a roller and cage in one embodiment of the invention;

FIG. 6 is a side view of a roller and cage in an embodiment of the invention;

FIG. 7 is an enlarged side view of a roller and cage in an embodiment of the invention;

fig. 8 is a cross-sectional view of a roller and cage in an embodiment of the invention.

Detailed Description

The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention.

The following discloses embodiments or examples of various implementations of the subject technology. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

It should be noted that fig. 1-8 are exemplary only, are not drawn to scale, and should not be construed as limiting the scope of the invention as actually claimed.

As shown in fig. 1, 2 and 3, a roller bearing assembly 1 of an aircraft engine 900 is a key component for normal operation of the aircraft engine 900, and is disposed between a journal and a bearing seat of the aircraft engine 900 for supporting a rotor.

The roller bearing assembly 1 comprises an inner ring 11, rollers 10, a cage 13 and an outer ring 12; the cage 13 has pockets 13a, a cage inner surface 131 and a cage outer surface 132; the inner ring 11 and the outer ring 12 are respectively arranged on the inner side and the outer side of the retainer 13; the cage inner surface 131 is disposed opposite to the outer wall surface 11a of the inner ring 11 and defines an inner ring gap G1; the holder outer surface 132 is disposed opposite to the inner wall surface 12a of the outer ring 12 and defines an outer ring gap G2; the pocket 13a penetrates the cage 13 and communicates the inner ring gap G1 with the outer ring gap G2; the rollers 10 are rotatably disposed in the pockets 13a, and are sandwiched by the inner race 11 and the outer race 12.

As the speed of the aircraft engine 900 increases, heat is generated by friction between the rollers 10 of the roller bearing assembly 1 and the raceways of the inner and

outer rings

The roller bearing structure of the prior aero-engine has the following defects: as shown by arrows in fig. 2, a part of the lubricating oil in the inner ring gap G1 flows out through both side ends of the inner ring 11, and the other part flows into the outer ring gap G2 through the minute gaps between the rollers 10 and the pockets, and finally flows out from both side ends of the outer ring 12. Since the amount of the lubricating oil passing through the pocket gaps of the cage 13 is small, the lubricating oil flow and the heat exchange capability in the vicinity of the cage 13 are weak, and in this case, some of the lubricating oil inevitably accumulates on the raceway wall surface of the inner ring 11, while the lubricating oil flowing through the raceway wall surface of the outer ring 12 and the outer wall surface of the cage 13 is small. Therefore, it can be found that in the current aircraft engine, the heat dissipation capability of the roller bearing assembly 1 is weak, especially when the aircraft engine 900 is in rapid acceleration, rapid deceleration or other special working conditions for a long time, it is more likely to cause the lubricating oil to accumulate between the raceway wall surface of the inner ring 11 and the retainer 13, resulting in that the generated heat cannot be taken away by the lubricating oil in time, and further resulting in the temperature rise of the roller bearing assembly 1, and meanwhile, the raceway wall surface of the outer ring 12, due to less lubricating oil, has poor cooling capability, and will directly result in the performance degradation of the bearing, thereby further causing the performance degradation of the engine, even damaging the engine.

With continued reference to fig. 3, during operation of aircraft engine 900, rollers 10 spin relative to cage 13 and also rotate with cage 13 about a central axis C-C of cage 13. The axis of rotation a-a on which the rollers 10 rotate also rotates about the central axis C-C of the cage 13.

The extending direction of the central axis C-C of the retainer 13 is the axial direction of the retainer 13, and the axial central section B-B of the retainer 13 is a section perpendicular to the central axis C-C of the retainer 13 and passing through the midpoint of the axial width of the retainer 13. The extending direction of the rotation axis a-a of the roller 10 is the axial direction of the roller 10, the axial center outer circle 10a of the roller 10 is a circular ring located at the midpoint of the axial width on the outer surface of the roller 10, and the plane of the circular ring is perpendicular to the rotation axis a-a of the roller 10.

In the embodiments of the present invention, the reference numerals are carried over the reference numerals in fig. 1, 2, and 3 for the same components.

In order to improve the heat dissipation effect, as shown in fig. 4 and 5, a roller oil throwing groove 2 is arranged on the outer surface of the roller 10, and a retainer oil throwing groove 3 is arranged on the outer surface 13 of the retainer; the extending direction of the roller oil slinger 2 from the upstream end 2a to the downstream end 2b is the direction from the axial center of the roller 10 to the axial end face of the roller 10, and the extending direction of the cage oil slinger 3 from the upstream end 3a to the downstream end 3b is the direction from the axial edge of the pocket 13a to the axial end face of the cage 13; wherein, with the circumferential direction of the roller 10 as a reference, the downstream end 2b of the roller oil slinger 2 is positioned clockwise of the upstream end 2a of the roller oil slinger 2; and the downstream end 3b of the retainer oil slinger 3 is positioned clockwise of the upstream end 3a of the retainer oil slinger 3 with reference to the circumferential direction of the retainer 13; or the downstream end 2b of the roller oil slinger 2 is positioned counterclockwise of the upstream end 2a of the roller oil slinger 2 with reference to the circumferential direction of the roller 10; the downstream end 3b of the retainer oil slinger 3 is positioned counterclockwise of the upstream end 3a of the retainer oil slinger 3 with reference to the circumferential direction of the retainer 13.

Above-mentioned roller gets rid of the extending direction that oil groove 2 and holder got rid of oil groove 3 and the position relation each other makes the flowing direction of lubricating oil comparatively smooth and easy, can not experience great buckling to make lubricating oil can throw away the bearing rapidly along respective direction from the upper reaches end to the low reaches end under the effect of centrifugal force, and then reach the quick radiating technological effect of messenger roller bearing subassembly 1.

In the above embodiment, as shown in fig. 5, the lubricating oil in the roller oil slinger 2 flows from the upstream end 2a toward the downstream end 2b, and the lubricating oil in the cage oil slinger 3 flows from the upstream end 3a toward the downstream end 3 b.

With continued reference to fig. 4, the roller slinger 2 includes a leftward roller slinger 21 and a rightward roller slinger 22; the leftward roller oil slinger 21 and the rightward roller oil slinger 22 extend from the axial center of the roller 10 toward the end surfaces on both sides in the axial direction of the roller 10, respectively. This arrangement helps to throw the oil from both sides of the roller 10.

The leftward roller oil slinger 21 and the rightward roller oil slinger 22 are symmetrically disposed about an axially central outer circle 10a of the roller 10, the plane of the axially central outer circle 10a being perpendicular to the rotational axis a-a of the roller 10. This arrangement helps to improve the uniformity of the lubricant as it is thrown off both sides of the roller 10.

More specifically, the roller slinger 2 is three-dimensionally helical in shape.

With continued reference to fig. 4 and 5, the cage oil slinger 3 includes a left cage oil slinger 31 and a right cage oil slinger 32; the leftward cage oil slinger 31 and the rightward cage oil slinger 32 extend from the edges of both sides of the pocket 13a in the axial direction toward the end surfaces of both sides of the cage 13 in the axial direction, respectively. This arrangement helps the lubricating oil to enter the cage slinger 3 after leaving the roller slinger 2.

With continued reference to fig. 4 and 5, the leftward cage oil slinger 31 and the rightward cage oil slinger 32 are symmetrically disposed about an axially central cross-section B-B of the cage 13 that is perpendicular to the central axis C-C of the cage 13. This arrangement helps to distribute the lubricant evenly when it is thrown out.

More specifically, the shape of the retainer oil slinger 3 is a two-dimensional spiral.

In one embodiment, the roller oil slinger 2 forms a first included angle with a plane of an axially central outer circle 10a of the roller 10; a second included angle is formed between the retainer oil throwing groove 3 and the plane where the axial central excircle 10a of the roller 10 is located; the first included angle is equal to the second included angle. The roller oil throwing groove 2 and the plane of the axial central excircle 10a of the roller 10 form a first included angle, and the range of the first included angle is 30-50 degrees. The length of second left roller dump slot 212 and first right roller dump slot 221 is half the length of first left roller dump slot 211 and second right roller dump slot 222.

In order to further improve the heat dissipation effect, the retainer 13 is also provided with an oil through hole 13 b; the oil passage hole 13b penetrates the cage 13 and communicates the inner ring gap G1 and the outer ring gap G2.

In one embodiment, the plurality of oil passing holes 13b and the plurality of pockets 13a are provided at intervals in the circumferential direction of the cage 13. In another embodiment, the diameter of the oil passage hole 13b is the same as the width of the roller 10 in the axial direction.

In a more specific embodiment, left roller dump slot 21 comprises a first left roller dump slot 211 and a second left roller dump slot 212; right roller dump oil groove 22 comprises a first right roller dump oil groove 221 and a second right roller dump oil groove 222; wherein, with reference to the axial direction of roller 10, first left roller oil slinger 211 is disposed to the left of second left roller oil slinger 212, and second right roller oil slinger 222 is disposed to the right of first right roller oil slinger 221; the first left-hand roller oil slinger 211 and the second right-hand roller oil slinger 222 are symmetrically arranged about the axial central outer circle 10a of the roller 10; second left roller dump groove 212 is disposed symmetrically with first right roller dump groove 221 about the axially central outer circle 10a of roller 10. This arrangement contributes to an improvement in the oil guiding efficiency of the roller slinger 2.

Left cage dump slots 31 include a first left cage dump slot 311, a second left cage dump slot 312, and a third left cage dump slot 313; right cage oil slinger 32 comprises first right cage oil slinger 321, second right cage oil slinger 322 and third right cage oil slinger 323; first to left cage oil slinger 311 and first to right cage oil slinger 321 are symmetrically disposed about the axial center section B-B of cage 13, second to left cage oil slinger 312 and second to right cage oil slinger 322 are symmetrically disposed about the axial center section B-B of cage 13, third to left cage oil slinger 313 and third to right cage oil slinger 323 are symmetrically disposed about the axial center section B-B of cage 13; wherein, the first to left retainer oil-throwing groove 311, the second to left retainer oil-throwing groove 312 and the third to left retainer oil-throwing groove 313 are arranged in sequence along the circumferential direction of the retainer 13; the first rightward retainer oil slinger 321, the second rightward retainer oil slinger 322, and the third rightward retainer oil slinger 323 are sequentially disposed in the circumferential direction of the retainer 13. This arrangement contributes to an improvement in the oil guiding efficiency of the cage oil slinger 3.

With continued reference to fig. 5, the start point of the upstream end of the first leftward cage oil slinger groove 311 and the start point of the upstream end of the first rightward cage oil slinger groove 321 are located on the same straight line, and the straight line is collinear with the axial center line of the pocket 13 a.

As shown in fig. 6, 7 and 8, the roller bearing assembly 1 further comprises an oil slinger 14; the oil throwing baffle lug 14 is convexly arranged on the end face of the retainer 13, and the oil throwing baffle lug 14 is annular and is arranged on the same center line with the retainer 13. The oil throwing baffle lug 14 is a closed conical structure, and the angle of the conical angle is 30-40 degrees. The oil slinger 14 helps the lubricating oil to be thrown out.

The width of the roller oil throwing groove 2 is 5 to 8 percent of the axial width of the roller 10. The depth of the roller oil throwing groove 2 is 5 to 10 percent of the diameter of the roller 10. The length of the retainer oil throwing groove 3 is 5-6 mm, and the depth of the retainer oil throwing groove is about 10-20% of the thickness of the retainer. The axial length of the oil slinger 14 is 8 to 10 mm.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make modifications and variations without departing from the spirit and scope of the present invention.

Claims

1. A roller bearing assembly comprising an inner ring (11), rollers (10), a cage (13) and an outer ring (12); the cage (13) has pockets (13a), a cage inner surface (131) and a cage outer surface (132);

the inner ring (11) and the outer ring (12) are respectively arranged on the inner side and the outer side of the retainer (13); the cage inner surface (131) is disposed opposite to an outer wall surface (11a) of the inner ring (11) and defines an inner ring gap (G1); the cage outer surface (132) and an inner wall surface (12a) of the outer ring (12) are disposed opposite to each other, and an outer ring gap (G2) is defined; the pockets (13a) penetrate the cage (13) and communicate the inner ring gap (G1) with the outer ring gap (G2); the rollers (10) are rotatably provided in the pockets (13a) and sandwiched by the inner ring (11) and the outer ring (12);

the roller cage is characterized in that a roller oil throwing groove (2) is arranged on the outer surface of the roller (10), and a cage oil throwing groove (3) is arranged on the outer surface (132) of the cage;

the extension direction of the roller oil slinger (2) from the upstream end (2a) to the downstream end (2b) is the direction from the axial center of the roller (10) to the axial end face of the roller (10), and the extension direction of the cage oil slinger (3) from the upstream end (3a) to the downstream end (3b) is the direction from the axial edge of the pocket (13a) to the axial end face of the cage (13), the roller oil slinger (2) forming a first angle with the plane of the axial center excircle (10a) of the roller (10), the cage oil slinger (3) forming a second angle with the plane of the axial center excircle (10a) of the roller (10), the first angle being equal to the second angle;

wherein the downstream end (2b) of the roller oil slinger (2) is located clockwise of the upstream end (2a) of the roller oil slinger (2) with reference to the circumferential direction of the roller (10); and the downstream end (3b) of the retainer oil-throwing groove (3) is positioned at the position of the upstream end (3a) of the retainer oil-throwing groove (3) in the clockwise direction by taking the circumferential direction of the retainer (13) as a reference; or, the downstream end (2b) of the roller oil slinger (2) is positioned in a position counterclockwise of the upstream end (2a) of the roller oil slinger (2) with reference to the circumferential direction of the roller (10); and the downstream end (3b) of the retainer oil-throwing groove (3) is positioned at the position of the upstream end (3a) of the retainer oil-throwing groove (3) in the anticlockwise direction by taking the circumferential direction of the retainer (13) as a reference;

the roller oil slinger (2) comprises a leftward roller oil slinger (21) and a rightward roller oil slinger (22), and the leftward roller oil slinger (21) and the rightward roller oil slinger (22) extend from the axial center of the roller (10) towards the end faces of the two axial sides of the roller (10) respectively;

the retainer oil throwing groove (3) comprises a leftward retainer oil throwing groove (31) and a rightward retainer oil throwing groove (32), and the leftward retainer oil throwing groove (31) and the rightward retainer oil throwing groove (32) respectively extend from the edges of the two axial sides of the pocket hole (13a) towards the end faces of the two axial sides of the retainer (13);

the left retainer oil slinger (31) comprises a first left retainer oil slinger (311), a second left retainer oil slinger (312) and a third left retainer oil slinger (313); the right retainer oil-throwing groove (32) comprises a first right retainer oil-throwing groove (321), a second right retainer oil-throwing groove (322) and a third right retainer oil-throwing groove (323); the first leftward retainer oil throwing groove (311), the second leftward retainer oil throwing groove (312) and the third leftward retainer oil throwing groove (313) are sequentially arranged along the circumferential direction of the retainer (13); the first right-facing retainer oil throwing groove (321), the second right-facing retainer oil throwing groove (322) and the third right-facing retainer oil throwing groove (323) are sequentially arranged along the circumferential direction of the retainer (13); the starting point of the upstream end of the first leftward cage oil slinger groove (311) and the starting point of the upstream end of the first rightward cage oil slinger groove (321) are located on the same straight line, and the straight line is collinear with the axial center line of the pocket (13 a).

2. Roller bearing assembly according to claim 1, characterized in that the leftward roller oil slinger (21) and the rightward roller oil slinger (22) are symmetrically arranged with respect to an axially central outer circle (10a) of the roller (10), the plane of the axially central outer circle (10a) being perpendicular to the axis of rotation (a-a) of the roller (10).

3. Roller bearing assembly according to claim 1, characterized in that the roller oil slinger (2) is three-dimensionally helical in shape.

4. Roller bearing assembly according to claim 1, characterized in that the leftward cage oil slinger (31) and the rightward cage oil slinger (32) are symmetrically arranged with respect to an axial central cross-section (B-B) of the cage (13), which is perpendicular to a central axis (C-C) of the cage (13).

5. Roller bearing assembly according to claim 1, characterized in that the cage oil slinger (3) is shaped as a two-dimensional spiral.

6. The roller bearing assembly according to claim 1, characterized in that the cage (13) further has an oil through hole (13 b); the oil passage hole (13b) penetrates the cage (13) and communicates the inner ring gap (G1) and the outer ring gap (G2).

7. The roller bearing assembly according to claim 6, characterized in that a plurality of the oil passage holes (13b) and a plurality of the pockets (13a) are provided at intervals in the circumferential direction of the cage (13).

8. The roller bearing assembly according to claim 6, characterized in that the diameter of the oil passage hole (13b) is the same as the width in the axial direction of the roller (10).

9. The roller bearing assembly of claim 4, wherein the left roller oil slinger (21) comprises a first left roller oil slinger (211) and a second left roller oil slinger (212); the right roller oil slinger (22) comprises a first right roller oil slinger (221) and a second right roller oil slinger (222);

wherein the first left-hand roller oil slinger (211) is disposed to the left of the second left-hand roller oil slinger (212) and the second right-hand roller oil slinger (222) is disposed to the right of the first right-hand roller oil slinger (221) with reference to the axial direction of the roller (10);

the first left-hand roller oil slinger (211) and the second right-hand roller oil slinger (222) are symmetrically arranged about an axially central outer circle (10a) of the roller (10); the second left-hand roller oil slinger (212) is symmetrically disposed about the axial center outer circle (10a) of the roller (10) with the first right-hand roller oil slinger (221).

10. The roller bearing assembly of claim 9, characterized in that the first left-hand cage oil slinger (311) and the first right-hand cage oil slinger (321) are symmetrically disposed about an axial center cross-section (B-B) of the cage (13), the second left-hand cage oil slinger (312) and the second right-hand cage oil slinger (322) are symmetrically disposed about the axial center cross-section (B-B) of the cage (13), and the third left-hand cage oil slinger (313) and the third right-hand cage oil slinger (323) are symmetrically disposed about the axial center cross-section (B-B) of the cage (13).

11. The roller bearing assembly according to claim 1, characterized in that the roller bearing assembly (1) further comprises an oil slinger (14); the oil throwing baffle lug (14) is arranged on the end face of the retainer (13) in a protruding mode, and the oil throwing baffle lug (14) is annular and is arranged on the same center line with the retainer (13).

12. Roller bearing assembly according to claim 1, characterized in that the roller oil slinger (2) forms a first angle with the plane of the axially central outer circle (10a) of the roller (10), said first angle being in the range of 30 ° to 50 °.

13. The roller bearing assembly of claim 9, wherein the length of the second left roller oil slinger (212) and the first right roller oil slinger (221) is half the length of the first left roller oil slinger (211) and the second right roller oil slinger (222).

14. An aircraft engine, characterized in that it comprises a roller bearing assembly (1) according to any one of claims 1 to 13.