CN216343404U

CN216343404U - Multi-section arc trimming roller and self-aligning roller bearing thereof

Info

Publication number: CN216343404U
Application number: CN202122699994.9U
Authority: CN
Inventors: 杜姗珊; 张丽娜; 徐猛; 纪云巧; 徐巍; 孙岳松; 田琳; 杨金雷; 肖长春; 孙晓旭; 唐丽虓; 廖鑫; 高长柱
Original assignee: Wafangdian Bearing Group National Bearing Engineering Technology Research Center Co Ltd
Current assignee: Wafangdian Bearing Group National Bearing Engineering Technology Research Center Co Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-04-19
Anticipated expiration: 2031-11-05

Abstract

The utility model relates to a multi-section arc trimming roller and a self-aligning roller bearing thereof, which are matched in the field of main shafts of wind turbine generators, and the multi-section arc trimming roller comprises: two end faces and a circumferential face connected between the two end faces; the section of the circumferential surface is provided with a multi-segment arc structure, and the multi-segment arcs are symmetrically distributed by taking the radial axis of the roller as the center. In order to reduce or eliminate stress concentration of the contact edge and have better shock resistance, the modification of the rolling body is optimized, and the original structure of the two sides which are intersected during modification is changed into a tangent structure; not only in the production process, can be well matched with equipment programs such as production machine tools, grinding machines and the like, but also the reliability of the bearing can be improved, the requirement of actual operation is met, and the service life of the bearing is prolonged.

Description

Multi-section arc trimming roller and self-aligning roller bearing thereof

Technical Field

The utility model relates to a multi-section arc trimming roller and a self-aligning roller bearing thereof, which are matched in the field of main shafts of wind turbine generators and belong to the technical field of bearings.

Background

The main shaft bearing in the wind turbine generator works in the field all the year round, and the influence of temperature, load and wind speed on the main shaft bearing is great; severe working conditions, complex stress and vibration and impact on the wind power and wind speed along with the change of the wind power and wind speed; in addition, the main shaft bearing is installed on a tower cylinder with the height of dozens of meters, the hoisting, the maintenance and the replacement are inconvenient and the cost is high, and the factors are directly related to the service life and the reliability of the bearing, so that the main shaft bearing has special requirements. Moreover, the main shaft bearing transmits the force from the wind wheel acting on the chassis and simultaneously bears the axial force and the radial force from the wind wheel, and the bearing must be capable of allowing the misalignment caused by the deformation of the main shaft and the supporting bearing seat. Therefore, it is required to have high load capacity, high accuracy, high reliability, and the like.

The main shaft supporting system is characterized in that the inner ring of a bearing is arranged on a main shaft, the outer ring of the bearing is fixed on a bearing seat, and the main shaft bearing position can generate certain deformation under the action of bearing complex loads, so that the bearing is required to have certain aligning performance, can bear two loads of a radial load and an axial load simultaneously, and has larger bearing capacity.

Disclosure of Invention

In view of the fact that the bearing has high bearing capacity and reduces or eliminates stress concentration at the contact edge, the utility model aims to provide a multi-segment arc trimming roller and a self-aligning roller bearing thereof, which optimize the trimming of a rolling body and have high impact resistance.

In order to achieve the purpose, the utility model adopts the technical scheme that: a multi-segment tapered roller comprising: two end faces and a circumferential face connected between the two end faces; the section of the circumferential surface is provided with a multi-segment arc structure, and the multi-segment arcs are symmetrically distributed by taking the radial axis of the roller as the center;

furthermore, in order to improve the contact between the roller and the bearing raceway, a tangent structure is arranged at the joint of every two adjacent arcs; compared with the existing intersection structure of the arc sections, the contact state between the roller raceway and the roller is improved; the requirement of actual operation is met, and the service life of the bearing is prolonged;

preferably, the number of the multi-segment arcs of the circumferential surface is set to be 4 segments, the radial axis of the roller is taken as a center, and each two segments are distributed on two sides of the radial axis;

further, 4 arcs of the circumferential surface are respectively: the first modified arc section, the second modified arc section, the third modified arc section and the fourth modified arc section; the shape trimming modes between the first trimming arc section and the second trimming arc section, between the second trimming arc section and the third trimming arc section and between the third trimming arc section and the fourth trimming arc section are tangent structures, and a first trimming tangent point, a second trimming tangent point and a third trimming tangent point are respectively formed;

furthermore, the two end surfaces and the circumferential surface jointly enclose to form a body structure of the roller, and the roller is solid;

furthermore, the multi-arc sections of the circumferential surface are symmetrically distributed by taking the axial axis of the roller as the center;

furthermore, the head end of the first arc of the circumferential surface and one end surface, and the tail end of the last arc of the circumferential surface and the other end surface of the end surface are respectively in arc transition connection.

A specific idea of a further technical solution of the present invention is that a self-aligning roller bearing using the above roller structure includes: the self-aligning roller comprises an outer ring, an inner ring, an aligning roller and a retainer; the aligning roller adopts a multi-section arc trimming mode; the section of the circumferential surface of the aligning roller is of a multi-section arc structure; the raceways of the inner and outer rings are matched with the multi-segment arc of the circumferential surface of the aligning roller, and the aligning roller is arranged between the inner ring and the outer ring through a retainer;

furthermore, the outer ring is of a single-raceway type integrated structure, and the inner ring is of a double-raceway type integrated structure.

The utility model has the following effective effects: in order to reduce or eliminate the stress concentration of the contact edge and have better shock resistance, the modification of the rolling body is optimized, and the intersecting structure is changed into a tangent structure from the original structure when the modification is carried out on the two sides; not only in the production process, can be well matched with equipment programs such as production machine tools, grinding machines and the like, but also the reliability of the bearing can be improved, the requirement of actual operation is met, and the service life of the bearing is prolonged.

Drawings

FIG. 1 is a sectional view of a multi-segment arc trimming roller.

Fig. 2 is a structural view of the self-aligning roller bearing of the present invention.

Fig. 3 is a cross-sectional view showing a conventional spherical roller bearing roller profile modification.

In the figure, 1, a roller radial axis, 2, a roller axial axis, 3, a first trimming arc section, 4, a second trimming arc section, 5, a third trimming arc section, 6, a fourth trimming arc section, 7, a first trimming tangent point, 8, a second trimming tangent point, 9, a third trimming tangent point, 10, an outer ring, 11, an inner ring, 12, a self-aligning roller, 13 and a retainer.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model.

A multi-segment tapered roller as shown in fig. 1, comprising: two end faces and a circumferential face connected between the two end faces; the section of the circumferential surface is provided with a multi-segment arc structure, and the multi-segment arcs are symmetrically distributed by taking the radial axis 1 of the roller as the center;

the joint of every two adjacent arcs is provided with a tangent structure;

in the embodiment, the number of the multi-segment arcs of the circumferential surface of the bearing is set to be 4 segments, the radial axis 1 of the roller is taken as a center, and each two segments are distributed on two sides of the radial axis 1;

further, 4 arcs of the circumferential surface are respectively: a first modified arc section 3, a second modified arc section 4, a third modified arc section 5 and a fourth modified arc section 6; the shape trimming modes between the first trimming arc section 3 and the second trimming arc section 4, between the second trimming arc section 4 and the third trimming arc section 5 and between the third trimming arc section 5 and the fourth trimming arc section 6 are all tangent structures, and a first trimming tangent point 7, a second trimming tangent point 8 and a third trimming tangent point 9 are respectively formed;

the multi-arc sections of the circumferential surface are symmetrically distributed by taking the axial axis 2 of the roller as the center;

the head end of the first arc of the circumferential surface is in arc transition connection with one end surface, and the tail end of the last arc of the circumferential surface is in arc transition connection with the other end surface of the end surface.

As another embodiment of the present invention, a self-aligning roller bearing as shown in fig. 3 includes: an outer ring 10, an inner ring 11, a aligning roller 12, and a retainer 13; the aligning roller 12 adopts a multi-section arc trimming mode; the section of the circumferential surface of the aligning roller 12 is of a multi-segment arc structure; the inner and outer raceways are matched with the multi-segment arc of the circumferential surface of the aligning roller 12, and the aligning roller 12 is arranged between the inner ring 11 and the outer ring 10 through a retainer 13;

the outer ring 10 is of a single-raceway type integrated structure, and the inner ring 11 is of a double-raceway type integrated structure.

According to the method, by means of finite element analysis and comparison, the contact state between the self-aligning roller bearing raceway and the rolling body can be optimized by reflecting the tangent shape-modifying structure better. The requirement of the service life of the main shaft bearing of 20 years to 25 years is met.

The utility model changes the crossed modification structure of the rolling bodies into a tangent structure, not only can be well matched with equipment programs of production machine tools, grinding machines and the like in the production process, but also can improve the reliability of the bearing, meet the requirement of actual operation and prolong the service life of the bearing.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A multi-segment arc modified roller, comprising: two end faces and a circumferential face connected between the two end faces; the section of the circumferential surface is provided with a multi-segment arc structure, and the multi-segment arcs are symmetrically distributed by taking the radial axis of the roller as the center; the joint of every two adjacent arcs is provided with a tangent structure; the number of the multi-segment arcs of the circumferential surface is set to be 4 segments, the radial axis of the roller is taken as the center, and each two segments are distributed on two sides of the radial axis; the 4 arcs of the circumferential surface are respectively as follows: the first modified arc section, the second modified arc section, the third modified arc section and the fourth modified arc section; the trimming modes between the first trimming arc section and the second trimming arc section, between the second trimming arc section and the third trimming arc section and between the third trimming arc section and the fourth trimming arc section are tangent structures, and a first trimming tangent point, a second trimming tangent point and a third trimming tangent point are respectively formed.

2. The multi-segment arcuate modified roller as set forth in claim 1, wherein: the multi-arc sections of the circumferential surface are symmetrically distributed by taking the axial axis of the roller as the center.

3. The multi-segment arcuate modified roller as set forth in claim 2, wherein: the head end of the first arc of the circumferential surface is in arc transition connection with one end surface, and the tail end of the last arc of the circumferential surface is in arc transition connection with the other end surface of the end surface.

4. A self-aligning roller bearing using the roller according to any one of claims 1 to 3, comprising: the self-aligning roller comprises an outer ring, an inner ring, an aligning roller and a retainer; the aligning roller adopts a multi-section arc trimming mode; the section of the circumferential surface of the aligning roller is of a multi-section arc structure; the raceways of the inner and outer rings are fitted with the multi-segment arcs of the circumferential surface of the aligning roller, and the aligning roller is disposed between the inner and outer rings through the retainer.

5. The self-aligning roller bearing according to claim 4, wherein: the outer ring is of a single-raceway type integrated structure, and the inner ring is of a double-raceway type integrated structure.