CN114135570A

CN114135570A - High-speed angular contact bearing

Info

Publication number: CN114135570A
Application number: CN202111473703.2A
Authority: CN
Inventors: 李元宝; 石东丹; 周丽丽; 张博博; 许艳雷
Original assignee: AVIC Harbin Bearing Co Ltd
Current assignee: AVIC Harbin Bearing Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-03-04

Abstract

A high-speed angular contact bearing relates to a bearing. The invention solves the problems that the existing high-speed ball bearing is unreliable when used in a compact engine and the bearing is easy to be separated during assembly. A first inner ring (4) and a second inner ring (5) are arranged side by side from left to right and are connected through an inner diameter clamp (6), a plurality of rolling bodies (3) are arranged on the first inner ring (4) and the second inner ring (5) through a retainer (2), a groove ring (1) is arranged on the retainer (2) and the plurality of rolling bodies (3), a U-shaped groove (1-1) is formed in the outer side wall, corresponding to an oil inlet, of the groove ring (1), an annular groove (1-2) is formed in one side of the U-shaped groove (1-1), and the annular groove (1-2) is located on the outer side of the U-shaped groove (1-1). The lubrication of the inner ring far away from the oil inlet side at a high speed is ensured, the inner diameter increasing grooves of the two half inner rings are fixed by the inner diameter clamp, and the bearing is prevented from being loosened in the using process. The invention is used on the engine in a high-rotation environment.

Description

High-speed angular contact bearing

Technical Field

The invention relates to a bearing, in particular to a high-speed angular contact bearing, and particularly relates to a novel high-speed angular contact ball bearing with an inner ring provided with an oil return structure and an outer ring provided with an elastic support-extrusion oil film structure.

Background

In the current mainstream engine, in order to reduce the vibration of the engine, reduce the weight of the bearing, facilitate the installation and improve the reliability, an elastic support structure needs to be added to the bearing, and at present, two methods are mainly adopted for designing the elastic support structure, wherein firstly, the bearing and the elastic support structure are respectively designed, processed and manufactured and then integrated, and the other method is the integrated design of the elastic support and the bearing. The accumulated errors of the elastic support and the bearing are increased by respectively processing the elastic support and the bearing, so that the bearing needs to be integrally designed, the elastic support needs to be reasonably optimized to obtain reasonable supporting rigidity, oil film damping needs to be added to the elastic support to ensure that the rotor vibration during the working of the engine is reduced, and the oil inlet efficiency of the existing oil film damping structure is lower when the engine is started.

The rotating speed of the bearing reaches 56823r/min, and at the high rotating speed, enough lubrication must be applied to ensure the reliable operation of the bearing, so as to prevent the rolling body, the roller path and the retainer from direct metal contact, which causes abrasion and corrosion of the bearing surface, therefore, in various bearing applications, the selection of proper lubricant and lubrication modes is extremely important, the bearing lubrication is divided into grease lubrication and oil lubrication according to the different lubricants, and the lubrication modes of the bearings of the aeroengine are lubricant lubrication due to the working condition of high rotating speed of the bearings of the aeroengine, but some high-speed bearings can not adopt the sliding lubrication with excellent lubrication effect but only adopt the jet lubrication due to the structural layout of the engine, however, the jet lubrication can be only sprayed from one side of the bearing, so that the lubrication of the lubricating oil spraying side of the bearing with the two half inner rings is good, and the lubrication of the other half inner rings is poor easily.

The bearing structure type is double-half inner ring angular contact ball bearing, and the retainer and the rolling body cannot be designed into an integrated structure due to the small inner size of the bearing, so that bearing loose sleeve is easily caused when the bearing is installed on a host machine.

In summary, the existing high-speed ball bearing has the problems that the bearing is not reliable when used in a compact engine, and the bearing is easy to be loose when being assembled.

Disclosure of Invention

The invention aims to solve the problems that the existing high-speed ball bearing is unreliable when used in a compact engine and the bearing is easy to be loose during assembly, and further provides a high-speed angular contact bearing.

The technical scheme of the invention is as follows:

the utility model provides a high-speed angular contact bearing, includes that the groove circle that the area bullet was propped, holder, a plurality of rolling elements, first inner circle, second inner circle and internal diameter clip, first inner circle and second inner circle are arranged side by side and are connected through the internal diameter clip from left to right, and a plurality of rolling elements pass through the holder and install on first inner circle and second inner circle, and the groove circle that the area bullet was propped is installed on holder and a plurality of rolling elements, has seted up U type groove on the outer wall that corresponds oil feed hole department on the groove circle that the area bullet was propped, and the ring channel has been seted up to U type groove one side, the ring channel is located the outside in U type groove.

Furthermore, the grooved ring with the elastic support comprises a flange plate, a transition section and a mounting section, wherein the flange plate, the transition section and the mounting section are sequentially connected from right to left and are manufactured into a whole, the transition section is provided with a plurality of strip-shaped holes in the circumferential direction, two grooves are formed in the outer side wall of the mounting section, and a rolling body sliding groove is formed in the inner side wall of the mounting section.

Preferably, the depth of the U-shaped groove is 4 mm.

Preferably, the depth of the annular groove is 5 mm.

Furthermore, an oil return groove is formed in the first inner ring far away from the oil inlet side.

Further, an arc-shaped rolling groove is formed at the intersection of the first inner ring and the second inner ring.

Further, the inner diameter clamp is a ring clamp, and a notch is arranged on the inner diameter clamp.

Furthermore, the outer circumferential wall of the inner diameter clamp is provided with a connecting groove.

Furthermore, the spring expansion joint further comprises two spring expansion rings, and one spring expansion ring is arranged in each groove.

Compared with the prior art, the invention has the following effects:

1. the invention is applied to a high-speed engine with compact structure, the bearing and the spring support are integrated (finger spring support and groove ring are integrated), the accumulated assembly error is reduced, the oil inlet efficiency of the oil film damper when the engine is started is accelerated by an external diameter increasing oil tank (the finger inner ring is provided with an oil return structure) and a U-shaped groove structure, meanwhile, the lubrication of the inner ring far away from the oil inlet side at high speed can be ensured, the lubrication effect is improved, the stability of the bearing in the use process is further ensured, the internal diameter increasing grooves of the two half inner rings are fixed by the internal diameter clamp, and the bearing is prevented from being loosened in the use process.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a right side view of FIG. 1;

fig. 3 is a front sectional view of the grooved ring with spring support 1;

FIG. 4 is a view in the direction K of FIG. 3;

fig. 5 is a front sectional view of the first inner race;

FIG. 6 is a front view of the inner diameter clip;

FIG. 7 is a longitudinal cross-sectional view of FIG. 6;

fig. 8 is a schematic view of the rotation in the direction a of fig. 6.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 8, and the high-speed angular contact bearing of the embodiment includes a grooved ring with spring support 1, a cage 2, a plurality of rolling elements 3, a first inner ring 4, a second inner ring 5 and an inner diameter clip 6, wherein the first inner ring 4 and the second inner ring 5 are arranged side by side from left to right and are connected through the inner diameter clip 6, the plurality of rolling elements 3 are mounted on the first inner ring 4 and the second inner ring 5 through the cage 2, the grooved ring with spring support 1 is mounted on the cage 2 and the plurality of rolling elements 3, a U-shaped groove 1-1 is formed on an outer side wall of the grooved ring with spring support 1 corresponding to an oil inlet, an annular groove 1-2 is formed on one side of the U-shaped groove 1-1, and the annular groove 1-2 is located outside the U-shaped groove 1-1.

In the embodiment, the U-shaped groove 1-1 is added at the position opposite to the oil hole, so that the oil inlet efficiency is improved.

The inner ring of the embodiment adopts the first inner ring 4 and the second inner ring 5, and the first inner ring 4 and the second inner ring 5 are connected through the inner diameter clamp 6, so that the first inner ring 4 and the second inner ring 5 can be effectively prevented from being separated and separated during installation.

The second embodiment is as follows: the embodiment is described with reference to fig. 3, the grooved ring 1 with a spring support of the embodiment includes a flange 1-3, a transition section 1-4 and a mounting section 1-5, the flange 1-3, the transition section 1-4 and the mounting section 1-5 are connected in sequence from right to left and are made into a whole, the transition section 1-4 is provided with a plurality of strip-shaped holes 1-6 in the circumferential direction, the outer side wall of the mounting section 1-5 is provided with two grooves 1-7, and the inner side wall of the mounting section 1-5 is provided with rolling body sliding grooves 1-8. So arranged, the flanges 1-3 facilitate connection with associated components. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: the present embodiment will be described with reference to fig. 3, in which the depth of the U-shaped groove 1-1 of the present embodiment is 4 mm. So set up, be convenient for fill lubricating oil. Other compositions and connections are the same as in the first or second embodiments.

The fourth concrete implementation mode: referring to fig. 3, the present embodiment will be described, in which the annular groove 1-2 has a depth of 5 mm. So set up, be convenient for increase lubricating oil filling efficiency. Other compositions and connection relationships are the same as in the first, second or third embodiment.

The fifth concrete implementation mode: referring to fig. 5, the first inner ring 4 of the present embodiment is provided with oil return grooves 4-1 on the side away from the oil inlet side. The arrangement is that the lubricating oil flowing out of the bearing is used for secondary lubrication of the inner ring on the side again. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The sixth specific implementation mode: in the present embodiment, the arcuate rolling groove 7 is formed at the intersection of the first inner race 4 and the second inner race 5, as described with reference to fig. 1. So set up, be convenient for provide the rolling orbit for the rolling element. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: in the present embodiment, the inner diameter clip 6 is a ring clip, and the inner diameter clip 6 is provided with the notch 6-1, as described with reference to fig. 6 to 8. The arrangement is convenient for being suitable for inner rings with different diameters. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The specific implementation mode is eight: referring to fig. 7, the embodiment is described, in which the coupling groove 6-2 is provided on the outer circumferential wall of the inner diameter clip 6. So arranged, the first inner ring 4 and the second inner ring 5 are convenient to clamp together. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The specific implementation method nine: referring to FIG. 1, the present embodiment further includes two spring-rings, one spring-ring being mounted in each of the grooves 1-7. So set up, be convenient for form a great lubricating oil chamber. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The working principle of the invention is explained in conjunction with fig. 1 to 8:

the invention relates to a high-speed angular contact bearing which is based on a novel structure with a spring support-extrusion oil film and can be well lubricated at a high rotating speed, the bearing and the spring support are integrally designed, two grooves are formed in the outer diameter of the bearing, spring piston rings are arranged in the two grooves, the outer diameter between the two grooves is designed to be smaller than the outer diameter of the bearing, so that a larger lubricating oil cavity is formed by the bearing and the two spring piston rings, a U-shaped groove is additionally arranged at the position opposite to an oil inlet hole, the depth of the U-shaped groove is 0.4mm, and meanwhile, an annular groove with the depth of 0.5mm is additionally arranged at the opening of the U-shaped groove for increasing the lubricating oil filling efficiency, so that lubricating oil can firstly enter the U-shaped groove and then instantly fill the whole oil cavity.

In order to ensure that the inner ring at the side of the bearing far away from the lubricating oil inlet is lubricated at a high speed, a U-shaped ring groove oil return structure is added to the inner ring at the side, the outer diameter of the U-shaped ring groove is 2.6mm higher than the diameter of the flange of the inner ring, and the lubricating oil flowing out of the bearing can be used for carrying out secondary lubrication on the inner ring at the side again.

A groove-shaped structure is additionally arranged in the inner diameter direction of each of the two half inner rings, the two half inner rings are connected through an inner diameter clamp, and two holes are formed in the inner diameter clamp, so that the clamp is convenient to mount.

The oil groove and the U-shaped groove are added at the outer diameter position after the elastic support and the bearing are integrated, so that oil film damping can immediately play a role when an engine is started. Meanwhile, the inner ring far away from the oil inlet side is additionally provided with a U-shaped oil return structure to ensure lubrication, and after the two half inner rings are fixed by the inner diameter clamp, the situation of sleeve loosening is not generated in the use process.

The invention is applied to the bearing of the domestic turboshaft engine for the first time, 2 sets of 1500-hour tests of the bearing are successfully completed in a tester, and the bearing state is good after 1000-hour test run of a certain type of engine.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A high speed angular contact bearing characterized by: it comprises a grooved ring (1) with elastic supports, a retainer (2), a plurality of rolling bodies (3), a first inner ring (4), a second inner ring (5) and an inner diameter clamp (6),

the first inner ring (4) and the second inner ring (5) are arranged side by side from left to right and are connected through an inner diameter clamp (6), a plurality of rolling bodies (3) are arranged on the first inner ring (4) and the second inner ring (5) through a retainer (2), a grooved ring (1) with elastic supports is arranged on the retainer (2) and the plurality of rolling bodies (3),

the outer side wall of the groove ring (1) with the elastic support, which corresponds to the oil inlet hole, is provided with a U-shaped groove (1-1), one side of the U-shaped groove (1-1) is provided with an annular groove (1-2), and the annular groove (1-2) is positioned on the outer side of the U-shaped groove (1-1).

2. A high speed angular contact bearing according to claim 1, wherein: the groove ring (1) with the elastic support comprises a flange plate (1-3), a transition section (1-4) and a mounting section (1-5), wherein the flange plate (1-3), the transition section (1-4) and the mounting section (1-5) are sequentially connected from right to left and are manufactured into a whole, a plurality of strip-shaped holes (1-6) are formed in the transition section (1-4) in the circumferential direction, two grooves (1-7) are formed in the outer side wall of the mounting section (1-5), and a rolling body sliding groove (1-8) is formed in the inner side wall of the mounting section (1-5).

3. A high speed angular contact bearing according to claim 2, wherein: the depth of the U-shaped groove (1-1) is 4 mm.

4. A high speed angular contact bearing according to claim 1 or 3, wherein: the depth of the annular groove (1-2) is 5 mm.

5. A high speed angular contact bearing according to claim 1, wherein: an oil return groove (4-1) is formed in the first inner ring (4) far away from the oil inlet side.

6. A high speed angular contact bearing according to claim 5, wherein: an arc-shaped rolling groove (7) is formed at the intersection of the first inner ring (4) and the second inner ring (5).

7. A high speed angular contact bearing according to claim 1 or 6, wherein: the inner diameter clamp (6) is a ring clamp, and a gap (6-1) is arranged on the inner diameter clamp (6).

8. A high speed angular contact bearing according to claim 7, wherein: the outer circumferential wall of the inner diameter clamp (6) is provided with a connecting groove (6-2).

9. A high speed angular contact bearing according to claim 8, wherein: it also comprises two spring piston rings, and one spring piston ring is arranged in each groove (1-7).