CN114483792A

CN114483792A - Retainer and bearing

Info

Publication number: CN114483792A
Application number: CN202210021307.4A
Authority: CN
Inventors: 石东丹; 周丽丽; 张振宇; 李元宝; 孙志强; 张博博; 许艳雷
Original assignee: AVIC Harbin Bearing Co Ltd
Current assignee: AVIC Harbin Bearing Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-05-13

Abstract

The invention relates to a retainer and a bearing, in particular to a retainer and a cylindrical roller bearing with the retainer, and aims to solve the problems that the contact position of a retainer pocket cross beam of an aviation cylindrical roller bearing and a rolling body is not good, so that the vibration of the retainer is increased, and the retainer is broken when the vibration is serious, wherein the retainer comprises a retainer body, a plurality of pockets are uniformly processed in the circumferential direction of the retainer body, the retainer body is divided into a first part and a second part by the circumferential central line of the contact position of each rolling body and the corresponding pocket, and when the retainer body is guided by a bearing inner ring, the weight ratio of the first part to the second part is 1: 2, when the retainer body is guided by the bearing outer ring, the weight ratio of the first part to the second part is 2: the invention provides a cylindrical roller bearing for aviation, and belongs to the field of bearings.

Description

Retainer and bearing

Technical Field

The invention relates to a retainer and a cylindrical roller bearing with the same, and belongs to the field of bearings.

Background

The cylindrical roller bearing is an important part of an aircraft engine and plays an important role in the performance of the engine. The bearing is greatly influenced by the acting force of the rolling body in the working and running process, if the contact position of the cage pocket cross beam and the rolling body is not good, the vibration of the cage in the use process of the bearing is easily increased, the phenomena of uneven contact area and eccentric wear of a guide surface of the cage pocket cross beam and the rolling body often occur, and the dynamic balance precision of the cage is reduced. Particularly for a high-speed bearing, the problem that the retainer is broken due to uneven stress and the like can be caused in severe cases, the integral service performance of the bearing is seriously influenced, and the use requirement of high reliability of an aeroengine can not be met.

Disclosure of Invention

The invention provides a retainer and a bearing, and aims to solve the problems that a contact position of a retainer pocket cross beam and a rolling body of an aviation cylindrical roller bearing is not good, so that vibration of the retainer is increased, and the retainer is broken when the vibration is serious.

The technical scheme adopted by the invention is as follows:

it includes the holder body, and evenly processing has a plurality of pockets on the circumferencial direction of holder body, and every rolling element is divided into first portion and second part with the holder body with the circumference central line of the contact position of corresponding pocket, and when the holder body was the bearing inner race guide, the weight ratio of first portion and second part was 1: 2, when the retainer body is guided by the bearing outer ring, the weight ratio of the first part to the second part is 2: 1.

a bearing comprises an inner ring, an outer ring, a plurality of rolling bodies and the retainer, wherein the retainer is arranged between the inner ring and the outer ring, and each rolling body is arranged in each pocket of the retainer.

Has the advantages that:

according to the invention, the optimal contact position of the rolling body in the pocket hole of the retainer is obtained by calculating the weight of the retainer body, then the main influence parameters are adjusted, and the internal-external weight ratio of the retainer body (the pocket hole and rolling body contact area) is changed, so that the rolling body is just positioned at the optimal contact position in the pocket hole along the rolling direction, when the bearing works, the impact force generated when the rolling body contacts the pocket hole cross beam of the retainer has the minimum influence on the vibration of the whole retainer, the vibration of the retainer in the operation process can be effectively reduced, particularly for a high-speed bearing, the operation of the retainer is more stable and reliable, and the problem of the fracture of the retainer can be avoided. After multiple tests, part of the bearings are optimized and improved according to the method, the bearings run stably in the test process, and the bearing retainer is still in a good state after being tested for multiple times.

Drawings

FIG. 1 is a schematic view of a cage construction;

FIG. 2 is a schematic view of a bearing construction;

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the cage according to the embodiment includes a cage body 1, a plurality of pockets 1-1 are uniformly processed in the circumferential direction of the cage body 1, a circumferential center line 2 of a contact position of each rolling element and the corresponding pocket 1-1 divides the cage body 1 into a first part a and a second part b, and when the cage body 1 is guided by a bearing inner ring, a weight ratio of the first part a to the second part b is 1: 2, when the retainer body 1 is guided by the bearing outer ring, the weight ratio of the first part a to the second part b is 2: 1.

the second embodiment is as follows: the embodiment is described with reference to fig. 1, and the cage of the embodiment further includes locking points 1-2, the locking points 1-2 are located on the outer diameter surface of the cage body 1, and one or more locking points 1-2 are processed between any two adjacent pockets 1-1 on the cage body 1. The locking points 1-2 are used to limit the rolling bodies from falling out of the pockets during the assembly and disassembly of the bearing, and are otherwise the same as in the first embodiment.

The third concrete implementation mode: the present embodiment will be described with reference to fig. 1, and the retainer of the present embodiment is an integral structure. The other is the same as in the first or second embodiment.

The fourth concrete implementation mode: referring to fig. 2, the present embodiment is described as a bearing including an inner ring, an outer ring, a plurality of rolling elements, and a cage according to embodiments 1 to 3, the cage being installed between the inner ring and the outer ring, each rolling element being installed in each pocket 1-1 of the cage. The others are the same as the first, second or third embodiments.

The fifth concrete implementation mode: referring to fig. 2, the embodiment will be described, and a bearing according to the embodiment is taken as an example of a certain bearing, the weight of a cage body is firstly calculated, the optimal contact position between a rolling body of the bearing and a cage pocket cross beam is obtained, and then main influence parameters are adjusted, so that the rolling body is just positioned at the optimal contact position in a pocket along the rolling direction. Through multiple test applications, the vibration influence of the impact force generated when the rolling body contacts the pocket cross beam of the retainer on the whole retainer can be ensured to be minimum when the bearing works, the vibration of the retainer in the working and running process can be effectively reduced, and the retainer can run more stably and reliably especially for a high-speed bearing.

The main factors influencing the contact position of the rolling body and the cross beam of the pocket hole of the retainer are the inner ring flange coefficient, the guide clearance between the inner ring flange diameter and the retainer, the diameter of the rolling body and the structural form of the retainer.

1. And determining the rib coefficient of the inner ring. The inner ring flange coefficient generally takes a value of 0.35-0.45.

2. And a guide clearance between the inner ring flange diameter and the retainer. The general value is 0.3-0.9mm, and the value is determined by the dimension specification of the bearing and the specific working condition.

3. And (4) selecting the diameter of the rolling body. The diameter of the rolling body is generally selected according to the design specification, and the diameter of the rolling body can be adjusted according to the inner space of the bearing.

4. The structure of the retainer is determined, and besides the functional structure, the main structure of the retainer can be adjusted, such as the structural forms of adding weight reduction grooves, oil grooves, inner and outer steps, locking points 1-2 and the like.

After the main influence factors are determined, the contact position of the rolling body and the cross beam of the pocket of the cage is calculated, whether the contact position meets the requirement or not is judged through three-dimensional modeling, and if the contact position does not meet the requirement, the four contents can be adjusted to enable the contact position to meet the requirement of a scheme. The other is the same as the first, second, third or fourth embodiments.

Claims

1. The utility model provides a cage, it includes cage body (1), and evenly processing has a plurality of pockets (1-1) on the circumferencial direction of cage body (1), its characterized in that: the circumferential center line (2) of the contact position of each rolling element and the corresponding pocket (1-1) divides the cage body (1) into a first part (a) and a second part (b), and when the cage body (1) is guided by a bearing inner ring, the weight ratio of the first part (a) to the second part (b) is 1: 2, when the retainer body (1) is guided by the bearing outer ring, the weight ratio of the first part (a) to the second part (b) is 2: 1.

2. a holder as claimed in claim 1, wherein: the cage further comprises locking points (1-2), wherein the locking points (1-2) are positioned on the outer diameter surface of the cage body (1), and one or more locking points (1-2) are processed between any two adjacent pockets (1-1) on the cage body (1).

3. A holder as claimed in claim 1, wherein: the retainer is of an integrated structure.

4. A bearing, it includes inner circle, outer lane and a plurality of rolling element, its characterized in that: it further comprises a cage according to claims 1-3, which is mounted between the inner ring and the outer ring, each rolling element being mounted in each pocket (1-1) of the cage.

5. A bearing according to claim 4, wherein: the guide clearance between the inner ring flange and the retainer is 0.3-0.9 mm.

6. A bearing according to claim 5, wherein: the coefficient of the inner ring rib is 0.35-0.45.