CN218377314U

CN218377314U - Omnidirectional roller bearing structure for wind turbine

Info

Publication number: CN218377314U
Application number: CN202222241290.1U
Authority: CN
Inventors: 郑守亮; 王妍; 徐三军; 太松梅; 曾香荣
Original assignee: Luoyang Shiteng Bearing Co ltd
Current assignee: Luoyang Shiteng Bearing Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2023-01-24
Anticipated expiration: 2032-08-25

Abstract

An omnidirectional roller bearing structure for a wind turbine comprises an inner ring, an outer ring, a radial roller retainer combination, an axial retainer ring, an axial roller and an axial roller retainer combination; the radial roller is arranged between the inner ring and the outer ring in a rolling way; the axial retainer rings are arranged at two ends of the inner ring and the outer ring, and the radial rollers are arranged between the axial retainer rings and the end faces of the outer ring in a rolling manner; adjacent radial rollers are kept isolated by a radial roller retainer combination; adjacent axial rollers are kept isolated by an axial roller retainer combination; two rows of radial rollers are axially arranged, and the adjacent end surfaces of the two rows of radial rollers are mutually butted; in the structure of the bearing, the radial rollers adopt a two-row structure design, and under the condition that the axial structure size of the omnidirectional roller bearing for the wind turbine is not changed, the axial length of the radial rollers is shortened, so that the processing precision of the roller contour lines is easier to guarantee, the diameter of the radial rollers does not need to be increased, and the rotational inertia of the omnidirectional roller bearing for the wind turbine is reduced.

Description

Omnidirectional roller bearing structure for wind turbine

Technical Field

The utility model relates to a bearing technical field for the wind turbine, concretely relates to omnidirectional roller bearing structure for wind turbine.

Background

The rolling surfaces of the radial rollers of the omnidirectional roller bearing for the domestic wind turbine are more and more logarithmic curves to improve the service life of the bearing; however, because of the problem of processing precision, the effective contact length between the contour line of the radial roller and the raceway surfaces of the inner ring and the outer ring is not in an ideal design state, so that when the radial roller is designed, in order to ensure the service life of a bearing, the diameter of the radial roller is increased to make up for processing precision errors and improve the contact stress between the radial roller and the raceway surfaces of the inner ring and the outer ring; however, after the diameter of the radial roller is increased, the rotational inertia of the bearing is increased, the initial rotational moment of the bearing is increased, and the wind turbine can only be started at a high wind speed, so that the working efficiency of the wind turbine is affected.

SUMMERY OF THE UTILITY MODEL

In order to overcome not enough in the background art, the utility model discloses an omnidirectional roller bearing structure for wind turbine, its radial roller is provided with two along the axial, under the unchangeable condition of omnidirectional roller bearing axial structure size for wind turbine, the axial length of radial roller has been shortened, make the machining precision of roller outline line guarantee more easily, radial roller outline line and interior, the effective contact length of outer lane raceway surface is close ideal design status more, consequently when designing radial roller, need not to increase radial roller's diameter again, make bearing inertia can reduce.

In order to realize the utility model aims at, the utility model adopts the following technical scheme: an omnidirectional roller bearing structure for a wind turbine comprises an inner ring, an outer ring, a radial roller retainer combination, an axial retainer ring, an axial roller and an axial roller retainer combination; the radial roller is arranged between the inner ring and the outer ring raceway surface in a rolling way; the axial retainer rings are arranged at two ends of the inner ring and the outer ring, and the radial rollers are arranged between the axial retainer rings and the end faces of the outer ring in a rolling manner; adjacent radial rollers are kept isolated by a radial roller retainer combination; adjacent axial rollers are kept isolated by an axial roller retainer combination; two rows of radial rollers are axially arranged, and the adjacent end surfaces of the two rows of radial rollers are mutually butted; by adopting the structural design of two rows of radial rollers, the axial length of the radial rollers is shortened under the condition that the axial structure size of the omnidirectional roller bearing for the wind turbine is unchanged, so that the processing precision of roller contour lines is easier to guarantee, the effective contact length of the radial roller contour lines and the inner and outer ring raceway surfaces is closer to an ideal design state, the diameter of the radial rollers is not required to be increased when the radial rollers are designed, and the rotational inertia of the bearing is reduced

Further, the radial roller cage combination comprises radial roller isolation blocks and a cage end ring; the radial roller isolation blocks are uniformly distributed between the two retainer end rings and are fixedly connected; the radial roller isolation blocks are made of metal aluminum or Teflon materials with Teflon coated on the surfaces, and the end rings of the retainer are made of brass, so that the weight of the radial roller retainer combination is greatly reduced, and the rotational inertia of the bearing is further reduced.

Preferably, the inner side end faces of two rows of radial rollers are isolated by a radial roller retainer combination; the arrangement mode of the radial rollers solves the problem of hard-to-hard friction caused by the contact of the end parts of two rows of radial rollers, so that the problem that the contact part of the end parts of the radial rollers is damaged and falls off by materials can be avoided.

Furthermore, the roller retainer combination comprises a radial roller retainer and retainer end rings, wherein the two retainer end rings are respectively and fixedly arranged at two ends of the radial roller retainer.

Further, the axial section contour line of the radial roller is a logarithmic curve.

Furthermore, an inner ring oil groove is formed in the circumferential surface of the inner ring inner hole, a plurality of radial oil holes are uniformly distributed around the axis of the inner ring at the bottom of the inner ring oil groove, and the inner ring oil groove is communicated to the inner ring outer raceway surface through the radial oil holes.

Furthermore, the inner ring and the axial retainer ring are positioned and connected through a positioning pin, so that the positioning problem of the axial retainer ring in the assembling process is solved.

Furthermore, the axial roller retainer combination comprises an axial roller retainer and a retainer outer ring, wherein the retainer outer ring is fixedly connected to the outer circumferential surface of the axial roller retainer; the axial roller retainer is made of metal aluminum or Teflon material with the surface coated with Teflon, and the outer ring of the retainer is still made of brass, so that the weight of the axial roller retainer combination is greatly reduced, and the rotational inertia of the bearing is further reduced.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses an omnidirectional roller bearing structure for wind turbine, its radial roller is provided with two along the axial, consequently under the unchangeable condition of omnidirectional roller bearing axial structure size for wind turbine, the axial length of radial roller has been shortened, make the machining precision of roller outline line guarantee more easily, radial roller outline line and interior, the effective contact length of outer lane raceway surface is close ideal design status more, consequently when designing radial roller, need not to strengthen radial roller's diameter, make the bearing inertia reduce, the originated turning moment of bearing also correspondingly reduces, make wind turbine also can start work under lower wind speed, consequently, wind turbine's work efficiency has been improved.

Drawings

FIG. 1 is a schematic cross-sectional view of an omnidirectional roller bearing structure for a wind turbine according to a first embodiment;

FIG. 2 is a schematic view of a radial roller assembly according to the first embodiment;

FIG. 3 is a schematic external view of a radial roller cage assembly according to the first embodiment;

FIG. 4 is a schematic sectional view of an omnidirectional roller bearing structure for a wind turbine according to a second embodiment;

FIG. 5 is a schematic view of a radial roller assembly according to the second embodiment;

FIG. 6 is a schematic assembled view of the radial roller cage according to the second embodiment;

FIG. 7 is a schematic cross-sectional view of the inner ring;

fig. 8 is an appearance view of the axial roller cage assembly.

In the figure: 1. an inner ring; 1.1, an inner ring oil groove; 1.2, radial oil holes; 2. an outer ring; 3. a radial roller; 4. a radial roller retainer assembly; 4.1, radial roller isolation blocks; 4.2, a radial roller cage; 4.2.1, connecting rings; 4.3, a cage end ring; 5. an axial retainer ring; 6. an axial roller; 7. an axial roller retainer assembly; 7.1, an axial roller cage; 7.2, a cage outer ring; 8. and a positioning pin.

Detailed Description

The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.

The first embodiment is as follows:

an omnidirectional roller bearing structure for a wind turbine comprises an inner ring 1, an outer ring 2, radial rollers 3, a radial roller retainer combination 4, an axial retainer ring 5, axial rollers 6 and an axial roller retainer combination 7; an inner ring oil groove 1.1 is arranged on the circumferential surface of an inner hole of the inner ring 1, a plurality of radial oil holes 1.2 uniformly distributed around the axis of the inner ring 1 are arranged at the bottom of the inner ring oil groove 1.1, and the inner ring oil groove 1.1 is communicated to the outer raceway surface of the inner ring 1 through the radial oil holes 1.2; two ends of the raceway of the outer ring 2 are provided with flange structures; the radial rollers 3 are provided with two rows, 18 radial rollers 3 are arranged in each row, the radial rollers are arranged between the raceway surfaces of the inner ring 1 and the outer ring 2 in a rolling manner in a way that the adjacent end surfaces of the two rows of radial rollers 3 are mutually butted, and the axial section contour lines of the radial rollers 3 are logarithmic curves; the radial roller retainer combination 4 comprises radial roller isolation blocks 4.1 and retainer end rings 4.3, wherein 18 radial roller isolation blocks 4.1 are arranged, two side surfaces of each radial roller isolation block are arc surfaces matched with the radial rollers 3, the radial roller isolation blocks 4.1 are uniformly distributed between the two retainer end rings 4.3 in an annular shape, the radial roller isolation blocks 4.1 and the retainer end rings 4.3 are fixedly connected through bolts, the side surfaces of the adjacent radial roller isolation blocks 4.1 form isolation grooves, the radial rollers 3 are arranged in the isolation grooves, and the adjacent radial rollers 3 are kept isolated through the radial roller isolation blocks 4.1; the radial roller isolation block 4.1 is made of metal aluminum with Teflon coated on the surface or Teflon material, and the retainer end ring 4.3 is made of brass material; two axial retainer rings 5 are respectively arranged at two ends of the inner ring 1 and the outer ring 2, two groups of 48 axial rollers 6 are arranged, and the two groups of axial rollers 6 are respectively arranged between the axial retainer rings 5 and the end surface of the outer ring 2 in a rolling manner; the axial roller retainer combination 7 comprises an axial roller retainer 7.1 and a retainer outer ring 7.2, the axial roller retainer 7.1 is disc-shaped, isolation grooves are machined and uniformly distributed around an axis by radial milling, the outline of each isolation sheave is arc-shaped matched with the outer circumferential surface of the axial roller 6, the axial rollers 6 are arranged in the isolation grooves one by one along the radial direction and are isolated from each other, and the retainer outer ring 7.2 is fixedly connected with the outer circumferential surface of the axial roller retainer 7.1 through bolts; the axial roller retainer 7.1 is made of metal aluminum with Teflon coated on the surface or Teflon material, and the outer ring 7.2 of the retainer is made of brass material; the inner ring 1 and the axial retainer ring 5 are correspondingly provided with positioning pin holes which are positioned and connected through a positioning pin 8, and the positioning pin holes are processed through electric spark.

Example two:

the radial roller retainer combination 4 adopts a combination structure of a roller retainer 4.2 and retainer end rings 4.3, compared with the roller retainer combination 4 in the first embodiment, the roller retainer 4.2 is provided with a connecting ring 4.2.1 on the basis of an original roller isolating block 4.1, the roller isolating blocks 4.1 are connected into a whole through the connecting ring 4.2.1, the two retainer end rings 4.3 are respectively and fixedly arranged at two ends of the radial roller retainer 4.2 through bolts, the inner side end faces of the two rows of radial rollers 3 are mutually isolated through the connecting ring 4.2.1 of the roller retainer 4.2, the hard-to-hard friction problem caused by the contact of the end parts of the two rows of radial rollers is avoided, and meanwhile, the design of the roller retainer combination 4 also has the advantage of high structural strength.

The part of the utility model not detailed is prior art.

Claims

1. An omnidirectional roller bearing structure for a wind turbine comprises an inner ring (1), an outer ring (2), a radial roller (3), a radial roller retainer combination (4), an axial retainer ring (5), an axial roller (6) and an axial roller retainer combination (7); the radial roller (3) is arranged between the inner ring (1) and the outer ring (2) in a rolling manner; the axial retainer rings (5) are arranged at two ends of the inner ring (1) and the outer ring (2), and the radial rollers (3) are arranged between the axial retainer rings (5) and the end faces of the outer ring (2) in a rolling manner; adjacent radial rollers (3) are kept isolated by a radial roller retainer combination (4); adjacent axial rollers (6) are kept isolated by an axial roller retainer combination (7); the method is characterized in that: two rows of radial rollers (3) are arranged along the axial direction; the adjacent end surfaces of two rows of radial rollers (3) are mutually butted.

2. The omnidirectional roller bearing structure for a wind turbine as defined in claim 1, wherein: the roller cage combination (4) comprises radial roller isolation blocks (4.1) and a cage end ring (4.3); a plurality of radial roller isolation blocks (4.1) are uniformly distributed between the two retainer end rings (4.3) and are fixedly connected.

3. The omnidirectional roller bearing structure for a wind turbine as recited in claim 1, wherein: the collision end surfaces of two rows of radial rollers (3) are isolated by a radial roller retainer combination (4).

4. The omnidirectional roller bearing structure for a wind turbine as defined in claim 3, wherein: the roller retainer combination (4) comprises a radial roller retainer (4.2) and retainer end rings (4.3), wherein the two retainer end rings (4.3) are respectively and fixedly arranged at two ends of the radial roller retainer (4.2).

5. The omnidirectional roller bearing structure for a wind turbine as claimed in claim 1 or 3, wherein: the axial section contour line of the radial roller (3) is a logarithmic curve.

6. The omnidirectional roller bearing structure for a wind turbine as claimed in claim 1 or 3, wherein: the inner ring (1) inner hole circumferential surface is equipped with inner ring oil groove (1.1), and inner ring oil groove (1.1) bottom is equipped with a plurality of radial oilholes (1.2) of winding inner ring (1) axis equipartition setting, and inner ring oil groove (1.1) communicates to inner ring (1) outer raceway surface through radial oilhole (1.2).

7. The omnidirectional roller bearing structure for a wind turbine as claimed in claim 1 or 3, wherein: the inner ring (1) and the axial retainer ring (5) are positioned and connected through a positioning pin (8).

8. The omnidirectional roller bearing structure for a wind turbine as claimed in claim 1 or 3, wherein: the axial roller retainer combination (7) comprises an axial roller retainer (7.1) and a retainer outer ring (7.2), and the retainer outer ring (7.2) is fixedly connected to the outer circumferential surface of the axial roller retainer (7.1).