CN216044983U

CN216044983U - Asymmetric shape-modified double-row cylindrical roller main shaft bearing

Info

Publication number: CN216044983U
Application number: CN202122767274.1U
Authority: CN
Inventors: 张延娜; 张磊磊; 孙孝敬; 尚晓晓; 关向可; 杨沛然
Original assignee: Luoyang New Energy Bearing Manufacturing Co ltd
Current assignee: Luoyang New Energy Bearing Manufacturing Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-03-15
Anticipated expiration: 2031-11-12

Abstract

The utility model belongs to the technical field of bearings, and provides an asymmetric modification double-row cylindrical roller main shaft bearing which comprises a bearing outer ring, a bearing inner ring, a first row of rollers, a second row of rollers and a retainer; the outer shapes of the rollers in the second row are arranged asymmetrically, namely the outer wall surface close to the roller at the bearing end surface side has a modification with the length of L1 and the height of H1, the outer wall surface far away from the roller at the bearing end surface side has a modification with the length of L2 and the height of H2, L1 is larger than L2, and H1 is larger than H2. When the main shaft bearing bears larger axial force, the rollers have certain axial displacement in the stress direction, and the asymmetric modification of the second row of rollers is adopted, so that the bearing can be prevented from being clamped, the edge contact stress is reduced, and the risk that the roller path of the main shaft bearing is pressed and collapsed to a great extent is reduced.

Description

Asymmetric shape-modified double-row cylindrical roller main shaft bearing

Technical Field

The utility model belongs to the technical field of bearings, and particularly relates to an asymmetric modification double-row cylindrical roller main shaft bearing which is suitable for a wind driven generator system.

Background

With the continuous development of the wind power industry, the power of a wind driven generator is continuously increased, and a main shaft bearing is one of indispensable parts of the wind driven generator set. Two sets of spindle bearings are commonly used, an outer ring is fixed and is respectively connected with a front supporting seat and a rear supporting seat, an inner ring is connected with a shaft, and the inner ring and the outer ring can swing for 360 degrees. When the main shaft bearing connected with the rear supporting seat is subjected to large axial force, the roller can generate axial displacement. In the prior art, after the bearing displacement of the roller occurs, larger edge contact stress is generated, so that the main shaft bearing is clamped, and finally the roller path is crushed, thereby providing higher requirements for roller modification.

Disclosure of Invention

In order to overcome the technical problems, the utility model aims to provide an asymmetric modified double-row cylindrical roller main shaft bearing.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a kind of asymmetric shape-modified double-row cylindrical roller main shaft bearing, the double-row cylindrical roller main shaft bearing includes bearing outer race, bearing inner race, first row of rollers, second row of rollers, cage; the method is characterized in that: the outer shapes of the rollers in the second row are arranged asymmetrically, namely the outer wall surface close to the roller at the bearing end surface side has a modification with the length of L1 and the height of H1, the outer wall surface far away from the roller at the bearing end surface side has a modification with the length of L2 and the height of H2, L1 is larger than L2, and H1 is larger than H2.

The utility model provides an asymmetric modification double-row cylindrical roller main shaft bearing, which adopts an asymmetric modification roller design, when the main shaft bearing bears larger axial force and the roller generates axial displacement, because the roller path generates certain elastic deformation, the contact surface of the roller and the roller path changes, and the roller path can not generate edge contact under the influence of larger modification amount of the roller; therefore, the service life of the main shaft bearing is greatly prolonged.

Drawings

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

Fig. 2 is a schematic view of an asymmetric modification of the roller 4 according to the utility model.

In the figure: 1. the bearing comprises a bearing outer ring, 2, a bearing inner ring, 3, a first row of rollers, 4, a second row of rollers, 5, a retainer, 6, sides L1 with larger modification amount and H1, 7, and sides L2 with smaller modification amount and H2.

Detailed Description

The utility model is described with reference to the accompanying drawings and specific examples:

as shown in fig. 1, an asymmetric modified double-row cylindrical roller spindle bearing comprises a bearing outer ring 1, a bearing inner ring 2, a first row of rollers 3, a second row of rollers 4 and a retainer 5; referring to fig. 2, the rollers 4 in the second row have asymmetric outer shapes, that is, the outer wall surface near the end face side roller of the bearing has a modified length of L1 and a height of H1, the outer wall surface far from the end face side roller of the bearing has a modified length of L2 and a height of H2, L1 is greater than L2, and H1 is greater than H2.

Claims

1. A kind of asymmetric shape-modified double-row cylindrical roller main shaft bearing, the double-row cylindrical roller main shaft bearing includes bearing outer race, bearing inner race, first row of rollers, second row of rollers, cage; the method is characterized in that: the outer shapes of the rollers in the second row are arranged asymmetrically, namely, the outer wall surface close to the roller at the bearing end surface side has a modification with the length of L1 and the height of H1, the outer wall surface far away from the roller at the bearing end surface side has a modification with the length of L2 and the height of H2, and L1 is larger than L2.