CN220227512U

CN220227512U - Raceway special-shaped oil gallery and three-row cylinder variable-pitch bearing

Info

Publication number: CN220227512U
Application number: CN202320320116.8U
Authority: CN
Inventors: 杨金雷; 苍施良; 王宏达; 孙岳松; 田琳; 徐巍; 黄建魁; 吕迪聪; 任启蒙; 王有强
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: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-12-22
Anticipated expiration: 2033-02-27

Abstract

The utility model relates to a raceway special-shaped oil gallery and a three-row cylindrical variable pitch bearing, which are arranged at a raceway of an inner ring of the bearing, and comprise an axial section, a curved section and a radial section which are sequentially connected; the tangential line of the curved surface section in the radial direction deviates from the radial section by a distance H1; the tangential line of the curved surface section in the axial direction deviates from the axial section by a distance H2; and H1 is less than H2. According to the utility model, the raceway special-shaped oil gallery structure is provided with the axial section, the curved section and the radial section which are sequentially connected, so that the grease storage capacity of the raceway special-shaped oil gallery is improved, the distance of the tangential line of the curved section in the radial direction, deviating from the radial section, is H1 smaller than the distance of the tangential line of the curved section in the axial direction, deviating from the axial section, and is H2, so that the effect of ensuring the running stability of the roller on the raceway is achieved, the running duration of the bearing is further improved, the bearing capacity of the bearing is improved, the abrasion of the bearing is reduced, and the bearing has certain self-lubricating capacity.

Description

Raceway special-shaped oil gallery and three-row cylinder variable-pitch bearing

Technical Field

The utility model relates to the technical field of variable pitch bearings, in particular to a raceway special-shaped oil gallery and a three-row cylinder variable pitch bearing.

Background

Along with the gradual acceptance of clean energy sources in recent years, the cognition of wind power generation is also becoming deeper and deeper. The variable-pitch bearing is an indispensable key part in the design of the whole fan, is subjected to the influence of axial load, radial load and overturning moment at the same time during operation, and has the characteristics of complex working condition load condition, poor working condition environment, low overall rigidity and the like. The strength of the pitch bearing not only affects the whole service life of the bearing, but also has important influence on the whole stability and high-efficiency safe operation of the wind generating set.

However, in the technical field of variable pitch bearings, megawatt levels are continuously increased, the length of the blades is continuously increased, the requirement on load control capability is continuously improved, and for three rows of column variable pitch bearings, the position of the maximum hoop stress is at the position of a raceway oil groove. The structure at the raceway oil groove of the existing variable pitch bearing cannot adapt to concentrated hoop stress, so that the requirement cannot be met.

Disclosure of Invention

In view of the defects of the prior art, the utility model provides the roller path special-shaped oil groove and the three-row cylinder variable pitch bearing, which have the advantages of better increase of grease storage property, and guarantee of running stability of rollers on the roller path, so that the running duration of the bearing is prolonged, the bearing capacity is improved, the abrasion of the bearing is reduced, and the bearing has certain self-lubricating capacity.

In order to achieve the purpose, the technical scheme provided by the utility model is that the special-shaped oil gallery of the raceway is arranged at the raceway of the bearing inner ring and comprises an axial section, a curved section and a radial section which are sequentially connected; the tangential line of the curved surface section in the radial direction deviates from the radial section by a distance H1; the tangential line of the curved surface section in the axial direction deviates from the axial section by a distance H2; and H1 is less than H2.

Further, the radial segments are for supporting rolling elements.

Further, the axial segment is for supporting rolling elements.

Further, the curved surface section is a cylindrical surface with a radius R.

Further, the radial section is offset from the center of the cross section of the cylindrical surface by a distance L1 in the axial direction, the axial section is offset from the center of the cross section of the cylindrical surface by a distance L2 in the radial direction, and L1 is greater than L2.

Preferably, l1=26h1; l2=5h2; l1+h1=l2+h2=r.

The three-row cylindrical variable-pitch bearing comprises an inner ring, an outer ring and rollers, wherein a first rollaway nest, a second rollaway nest and a third rollaway nest are formed between the inner ring and the outer ring, and the first rollaway nest and the third rollaway nest are respectively provided with the rollaway nest special-shaped oil grooves.

Further, the third rollaway nest is provided with the rollaway nest special-shaped oil groove.

Further, the rollers comprise a first type of roller mounted to the first raceway, a second type of roller mounted to the second raceway, and a third type of roller mounted to the third raceway; the axes of the first type of rollers and the third type of rollers are perpendicular to the axis of the bearing, and the axis of the second type of rollers is parallel to the axis of the bearing.

Further, the outer ring comprises a first outer ring and a second outer ring which are pressed together, and the axial dimension of the first outer ring is larger than that of the second outer ring; a first rollaway nest and a second rollaway nest are formed between the first outer ring and the inner ring; and a third rollaway nest is formed between the second outer ring and the inner ring.

The utility model has the beneficial effects that: through setting the special-shaped oil groove structure of the roller path to the axial section, the curved surface section and the radial section which are connected in sequence, the grease storage space is increased so as to improve the grease storage capacity of the special-shaped oil groove structure, the distance of the tangent line of the curved surface section in the radial direction deviating from the radial section is H1 and is smaller than the distance of the tangent line of the curved surface section in the axial direction deviating from the axial section and H2, the effect of ensuring the running stability of the roller on the roller path is achieved, the running duration of the bearing is further improved, the bearing capacity of the bearing is improved, the abrasion of the bearing is reduced, and the bearing has certain self-lubricating capacity.

Drawings

FIG. 1 is a schematic view of a three row cylindrical pitch bearing in accordance with an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of the circled raceway shaped oil gallery of FIG. 1;

in the figure: 100. the special-shaped oil groove for the roller path comprises 110, an axial section, 120, a curved section, 130, a radial section, 200 and an inner ring,

300. outer race, 310, first outer race, 320, second outer race,

400. rollers, 410, first type rollers, 420, second type rollers, 430, third type rollers, 500, first raceways,

600. the second roller path is provided with a second roller path,

700. and a third raceway.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1 and 2, a special-shaped raceway oil gallery 100 is formed at a raceway of an inner ring of a bearing, and comprises an axial section 110, a curved section 120 and a radial section 130 which are sequentially connected; tangent to the curved surface section 120 in the radial direction deviates from the radial section by a distance H1; the tangent of the curved surface section 120 in the axial direction deviates from the axial section by a distance H2; and H1 is less than H2.

Referring to fig. 1, in one embodiment, the radial segments 130 are used to support rolling elements. The rolling bodies are radially arranged between the inner ring and the outer ring. In another embodiment, the axial segment 110 is used to support rolling elements. The rolling bodies are axially arranged between the inner ring and the outer ring. The location of the raceway profiled oil groove 100 may be adaptively selected according to the rolling element installation mode of the bearing and the specific location of the raceway.

In one embodiment, curved segment 120 is a cylindrical surface having a radius R.

In one embodiment, the radial segment 130 is axially offset from the cross-sectional center of the cylindrical surface by a distance L1, and the axial segment 110 is radially offset from the cross-sectional center of the cylindrical surface by a distance L2, with L1 being greater than L2.

Referring to fig. 2, in an embodiment, a tangential line of the curved surface section in a radial direction is offset from the radial section by a distance H1, a tangential line of the curved surface section in an axial direction is offset from the axial section by a distance H2, a distance L1, and a distance L2, respectively, of the radial section from a cross-sectional center of the cylindrical surface, and the axial section is offset from the cross-sectional center of the cylindrical surface in the radial direction, while satisfying l1=26h1; l2=5h2; l1+h1=l2+h2=r. Therefore, the use efficiency of the rollaway nest can be ensured, and the storage oil quantity of the oil ditch can be ensured; and the scheme can greatly ensure the bearing capacity of the oil groove, thereby ensuring the service life of the whole bearing.

Referring specifically to fig. 1, a three-row cylindrical pitch bearing includes an inner ring 200, an outer ring 300 and rollers 400, a first raceway 500, a second raceway 600 and a third raceway 700 are formed between the inner ring 200 and the outer ring 300, and raceway profiled oil grooves 100 are respectively formed in the first raceway 500 and the second raceway 600.

In one embodiment, the third raceway 700 is provided with a raceway profiled oil gallery 100 as described above.

In one embodiment, the rollers 400 include a first type of roller 410 mounted to the first raceway 500, a second type of roller 420 mounted to the second raceway 600, and a third type of roller 430 mounted to the third raceway 700; the axes of the first and third rollers 410, 430 are each perpendicular to the axis of the bearing, and the axis of the second roller 420 is parallel to the axis of the bearing.

In one embodiment, outer race 300 includes a first outer race 310 and a second outer race 320 press-fit together, the axial dimension of first outer race 310 being greater than the axial dimension of second outer race 320; a first raceway 500 and a second raceway 600 are formed between the first outer ring 310 and the inner ring 200; a third raceway 700 is formed between the second outer ring 320 and the inner ring 200. So set up, set up the form that is formed for two outer lane concatenation to outer lane 300, the rolling element of being convenient for more installs.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature. It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims

1. The utility model provides a raceway dysmorphism oil gallery, offers in the raceway department of bearing inner race, its characterized in that: comprises an axial section, a curved section and a radial section which are connected in sequence;

the tangential line of the curved surface section in the radial direction deviates from the radial section by a distance H1;

the tangential line of the curved surface section in the axial direction deviates from the axial section by a distance H2;

and H1 is less than H2.

2. The race shaped oil gallery of claim 1, wherein: the radial segment is used for supporting the rolling bodies.

3. The race shaped oil gallery of claim 1, wherein: the axial section is used for supporting the rolling bodies.

4. A raceway profiled oil groove according to any one of claims 1-3, characterized in that: the curved surface section is a cylindrical surface with a radius R.

5. The race shaped oil gallery of claim 4, wherein: the radial section is axially deviated from the center of the cross section of the cylindrical surface by a distance L1, the axial section is radially deviated from the center of the cross section of the cylindrical surface by a distance L2, and L1 is larger than L2.

6. The race shaped oil gallery of claim 5, wherein:

L1＝26H1；

L2＝5H2；

L1+H1＝L2+H2＝R。

7. the utility model provides a three row cylinder become oar bearing which characterized in that: the special-shaped oil gallery comprises an inner ring, an outer ring and rollers, wherein a first rollaway nest, a second rollaway nest and a third rollaway nest are formed between the inner ring and the outer ring, and the rollaway nest special-shaped oil gallery is respectively formed by the first rollaway nest and the third rollaway nest.

8. A three row cylindrical pitch bearing according to claim 7, wherein: the rollers comprise a first type of roller mounted on the first roller path, a second type of roller mounted on the second roller path and a third type of roller mounted on the third roller path; the axes of the first type of rollers and the third type of rollers are perpendicular to the axis of the bearing, and the axis of the second type of rollers is parallel to the axis of the bearing.

9. A three row cylindrical pitch bearing according to claim 7, wherein: the outer ring comprises a first outer ring and a second outer ring which are pressed together, and the axial dimension of the first outer ring is larger than that of the second outer ring; a first rollaway nest and a second rollaway nest are formed between the first outer ring and the inner ring; and a third rollaway nest is formed between the second outer ring and the inner ring.