Bearing retainer structure, tapered roller bearing and wind generating set

Abstract

The utility model provides a bearing retainer structure, a tapered roller bearing and a wind generating set, and belongs to the technical field of bearings, the bearing retainer structure comprises a first ring body, a second ring body and a plurality of connecting bodies, the plurality of connecting bodies are arranged between the first ring body and the second ring body at intervals, the connecting body is connected with the first ring body and the second ring body; a pocket is formed between every two adjacent connecting bodies, each pocket is provided with a first end face and a second end face which are oppositely arranged, and arc-shaped protruding pieces are arranged on the first end faces and the second end faces and used for being connected with the end faces of rolling bodies in an abutting mode. According to the bearing retainer structure provided by the utility model, the contact between the rolling body and the first ring body and the contact between the rolling body and the second ring body are changed into point contact from original surface contact due to the arrangement of the arc-shaped convex pieces, so that the contact area is reduced, the abrasion of the retainer and the end surface of the rolling body is greatly reduced, and the heat generated by friction inside a bearing is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a bearing retainer structure, a tapered roller bearing and a wind turbine generator set. Background Art

[0002] In recent years, with the increasing size of wind turbines, the power of wind turbines has gradually increased, and the load on the units has also increased accordingly. The main bearing is the main component that bears wind loads in wind turbines, and its reliability is extremely important.

[0003] Traditional single-row tapered bearings for wind turbines consist of an outer ring, an inner ring, rolling elements and a cage. When the bearing is running, the cage guides the rolling elements to run in a circumferential direction. The large end faces and small end faces of the rolling elements will continuously come into direct contact with the cage, causing greater wear and heat. As time goes by, the amount of wear increases, the strength of the cage decreases, and it may even break. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that the end faces of the rolling elements in the tapered roller bearings are in direct contact with the retaining frame, causing greater wear and heat, thereby providing a bearing retaining frame structure, a tapered roller bearing and a wind turbine generator set.

[0005] In order to solve the above technical problems, the utility model provides a bearing retainer structure, comprising: a first ring body, a second ring body and a plurality of connectors, wherein the plurality of connectors are arranged between the first ring body and the second ring body at intervals, and the connectors connect the first ring body and the second ring body;

[0006] Pockets are formed between adjacent connecting bodies, and the pockets have a first end face and a second end face that are arranged opposite to each other. The first end face and the second end face are provided with arc-shaped protrusions, and the arc-shaped protrusions are used to abut against the end face of the rolling body.

[0007] Optionally, grooves are provided on the first end surface and the second end surface, and the arc-shaped protrusions are provided in the grooves.

[0008] Optionally, the arc-shaped protrusion is a steel ball, and the steel ball is movably disposed in the groove.

[0009] Optionally, the groove is a square structure, a rectangular structure, or a cylindrical structure.

[0010] Optionally, the groove and the steel ball are clearance fit.

[0011] Optionally, the first end surface and the second end surface have one or more arc-shaped protrusions.

[0012] Optionally, the plurality of arc-shaped protrusions on the first end surface and the second end surface are evenly distributed.

[0013] Optionally, the arc-shaped protrusion on the first end surface is arranged opposite to the arc-shaped protrusion on the second end surface.

[0014] The utility model also provides a tapered roller bearing, comprising: an outer ring, an inner ring, rolling elements and the bearing retainer structure described in any one of the above items;

[0015] The bearing retainer structure is arranged between the outer ring and the inner ring, the rolling body is arranged in the pocket of the bearing retainer structure, the large end face of the rolling body abuts against the arc-shaped protrusion on the first end face, and the small end face of the rolling body abuts against the arc-shaped protrusion on the second end face.

[0016] The utility model also provides a wind turbine generator set, comprising: a wheel hub, a nacelle and the above-mentioned tapered roller bearing, wherein the wheel hub and the nacelle are rotatably connected via the tapered roller bearing.

[0017] The technical solution of the utility model has the following advantages:

[0018] 1. The bearing retainer structure provided by the utility model comprises a first ring body, a second ring body and a connecting body, the connecting body is used to connect the first ring body and the second ring body, pockets are formed between adjacent connecting bodies, the pockets have a first end face and a second end face arranged oppositely, the first end face and the second end face are provided with arc-shaped protrusions, and the arc-shaped protrusions abut against the end face of the rolling body;

[0019] The arrangement of the arc-shaped protrusion changes the contact between the rolling element and the first ring body and the second ring body from the original surface contact to point contact, thereby reducing the contact area, greatly reducing the wear of the retaining frame and the end surface of the rolling element, and reducing the heat generated by the internal friction of the bearing.

[0020] 2. The bearing retainer structure provided by the utility model has grooves on the first end face and the second end face. The arc-shaped protrusion is a steel ball, which is movably arranged in the groove. The steel ball can rotate under the action of the rolling body, so that the wear at any point of the steel ball is further reduced.

[0021] 3. The tapered roller bearing provided by the utility model includes an outer ring, an inner ring, rolling elements and a bearing retainer structure. The large end face and the small end face of the rolling element are both in contact with the arc-shaped protrusion, which reduces the wear between the retainer structure and the rolling element, reduces the heat generated by the internal friction of the bearing, and thus increases the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A structural schematic diagram of a specific implementation of the bearing retainer structure provided in Example 1 of the utility model;

[0024] Figure 2 for Figure 1 A local enlarged schematic diagram in FIG.

[0025] Figure 3 A schematic cross-sectional view of a specific implementation of the tapered roller bearing provided in Example 2;

[0026] Figure 4 for Figure 3 A partial enlarged schematic diagram of

[0027] Figure 5 This is a schematic cross-sectional structure diagram of a specific implementation of the wind turbine generator set provided in Example 3.

[0028] Description of reference numerals:

[0029] 1. First ring body; 2. Second ring body; 3. Connecting body; 4. Pocket; 5. First end face; 6. Second end face; 7. Arc-shaped protrusion; 8. Rolling body; 9. Groove; 10. Outer ring; 11. Inner ring; 12. Hub; 13. Nacelle. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1

[0035] The bearing retainer structure provided in this embodiment is used in roller bearings such as tapered roller bearings, and effectively reduces the friction between the retainer and the rolling elements.

[0036] like Figures 1 to 4 As shown, a specific implementation of the bearing retainer structure provided in this embodiment includes a first ring body 1, a second ring body 2 and a plurality of connectors 3, wherein the plurality of connectors 3 are arranged at intervals between the first ring body 1 and the second ring body 2, and the connectors 3 connect the first ring body 1 and the second ring body 2; pockets 4 are formed between adjacent connectors 3, and the pockets 4 have a first end face 5 and a second end face 6 that are arranged opposite to each other, and arc-shaped protrusions 7 are arranged on the first end face 5 and the second end face 6, and the arc-shaped protrusions 7 are used to abut against the end faces of rolling bodies 8.

[0037] The arrangement of the arc-shaped protrusion 7 changes the contact between the rolling element 8 and the first ring body 1 and the second ring body 2 from the original surface contact to point contact, thereby reducing the contact area, greatly reducing the wear of the retaining frame and the end faces of the rolling element, and reducing the heat generated by the internal friction of the bearing.

[0038] Specifically, the connecting body 3 is a cylindrical structure, the cross-sectional structure of the connecting body 3 is adapted to the structure of the rolling body 8, the side wall of the connecting body 3 is an arc-shaped structure, adapted to the arc-shaped side wall of the rolling body 8; the highest point of the arc-shaped protrusion 7 is higher than the first end face and the second end face 6, so that a gap is formed between the end face of the rolling body 8 and the first end face 5 and the second end face 6.

[0039] like Figure 1 and Figure 2 As shown, in the bearing retainer structure provided in this embodiment, a groove 9 is provided on the first end face 5 and the second end face 6, and the arc-shaped protrusion 7 is provided in the groove 9. The processing of the groove 9 is simpler and more convenient than directly providing a protrusion on the end face. In addition, as an alternative embodiment, the arc-shaped protrusion 7 can also be processed separately and fixed directly on the end face, for example, by welding or the like.

[0040] like Figure 2 As shown, in the bearing retainer structure provided in this embodiment, the arc-shaped protrusion 7 is a steel ball, and the steel ball is movably arranged in the groove 9. The steel ball can rotate under the action of the rolling body 8, so that the wear at any point of the steel ball is further reduced.

[0041] In addition, as an alternative embodiment, the arc-shaped protrusion 7 can also be a hemispherical structure, whose plane contacts the bottom of the groove 9 and the arc-shaped top surface contacts the rolling body 8; in addition, the arc-shaped protrusion 7 can also be a fixed arc-shaped protrusion set on the end face of the rectangular structure, in which case the groove 9 can be correspondingly set as a rectangular groove.

[0042] In the bearing retainer structure provided in this embodiment, the groove 9 is a square structure, a rectangular structure, or a cylindrical structure.

[0043] In the bearing retainer structure provided in this embodiment, the groove 9 and the steel ball are clearance-fitted. If the groove 9 is too large, the steel ball has a large range of movement in the groove 9, which affects the rotation stability of the rolling element 8.

[0044] In a specific embodiment, an arc-shaped protrusion 7 is provided on the first end face 5 and the second end face 6. The arc-shaped protrusion 7 is arranged in the central area of ​​the first end face 5 and the second end face 6, so that the rolling body 8 is supported by a fulcrum at the center position and rotates more stably.

[0045] In another specific embodiment, a plurality of arc-shaped protrusions 7 are provided on the first end face 5 and the second end face 6. The provision of the plurality of arc-shaped protrusions 7 shares the force of a single arc-shaped protrusion 7, further alleviating the wear on the arc-shaped protrusions 7. Specifically, the plurality of arc-shaped protrusions 7 are evenly distributed on the first end face 5 and the second end face 6 to avoid the arc-shaped protrusions 7 being biased to one side and the other side being vacant, resulting in inconsistent rotational force on the arc-shaped protrusions 7.

[0046] In the bearing retainer structure provided in this embodiment, the arc-shaped protrusion 7 on the first end face 5 and the arc-shaped protrusion 7 on the second end face 6 are arranged opposite to each other, so that the force positions at both ends of the rolling body 8 are the same, and the force during the rotation process is more balanced.

[0047] A specific implementation of the bearing retainer structure, a square groove 9 is set in the central area of ​​the first end face 5 and the second end face 6, the side length of the groove is 1.6mm, the depth is 1mm, the arc-shaped protrusion 7 is a steel ball, the diameter of the steel ball is 1.5mm, the steel ball is added to the groove 9, the rolling element 8 and the retainer are separated, and the contact between the rolling element 8 and the retainer is changed from surface contact to point contact.

[0048] Example 2

[0049] like Figure 3 and Figure 4 As shown, this embodiment also provides a tapered roller bearing, comprising: an outer ring 10, an inner ring 11, rolling elements 8 and a bearing cage structure described in any one of the above embodiments;

[0050] The bearing retainer structure is arranged between the outer ring 10 and the inner ring 11, and the rolling body 8 is arranged in the pocket 4 of the bearing retainer structure. The large end face of the rolling body 8 abuts against the arc-shaped protrusion 7 on the first end face 5, and the small end face of the rolling body 8 abuts against the arc-shaped protrusion 7 on the second end face 6.

[0051] The large end face and the small end face of the rolling element 8 are both in contact with the arc-shaped protrusion 7, which reduces the wear between the retaining frame structure and the rolling element 8, reduces the heat generated by the internal friction of the bearing, and thus increases the service life of the bearing.

[0052] Example 3

[0053] like Figure 5 As shown, this embodiment further provides a wind turbine generator set, comprising: a hub 12, a nacelle 13 and the tapered roller bearing described in the above embodiment, wherein the hub 12 and the nacelle 13 are rotatably connected via the tapered roller bearing.

[0054] By using tapered roller bearings with less wear to connect the hub 12 and the nacelle 13, the reliability of the bearings and the entire wind turbine generator set is further improved.

[0055] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A bearing retainer structure, characterized in that: include: A first ring body (1), a second ring body (2) and a plurality of connectors (3), wherein the plurality of connectors (3) are arranged at intervals between the first ring body (1) and the second ring body (2), and the connectors (3) connect the first ring body (1) and the second ring body (2); Pockets (4) are formed between adjacent connecting bodies (3), and the pockets (4) have a first end face (5) and a second end face (6) that are arranged opposite to each other. The first end face (5) and the second end face (6) are provided with arc-shaped protrusions (7), and the arc-shaped protrusions (7) are used to abut against the end face of a rolling body (8).

2. The bearing retainer structure according to claim 1, characterized in that: A groove (9) is provided on the first end surface (5) and the second end surface (6), and the arc-shaped protrusion (7) is arranged in the groove (9).

3. The bearing retainer structure according to claim 2, characterized in that: The arc-shaped protruding member (7) is a steel ball, and the steel ball is movably arranged in the groove (9).

4. The bearing retainer structure according to claim 3, characterized in that: The groove (9) is a square structure, a rectangular structure, or a cylindrical structure.

5. The bearing retainer structure according to claim 3, characterized in that: The groove (9) and the steel ball are clearance-fitted.

6. The bearing retainer structure according to claim 1, characterized in that: One or more arc-shaped protrusions (7) are provided on the first end surface (5) and the second end surface (6).

7. The bearing retainer structure according to claim 6, characterized in that: The plurality of arc-shaped protruding parts (7) on the first end surface (5) and the second end surface (6) are evenly distributed.

8. The bearing retainer structure according to any one of claims 1 to 7, characterized in that: The arc-shaped protruding part (7) on the first end surface (5) and the arc-shaped protruding part (7) on the second end surface (6) are arranged opposite to each other.

9. A tapered roller bearing, characterized in that: include: An outer ring (10), an inner ring (11), rolling elements (8) and a bearing cage structure according to any one of claims 1 to 8; The bearing retainer structure is arranged between the outer ring (10) and the inner ring (11), and the rolling body (8) is arranged in the pocket (4) of the bearing retainer structure. The large end face of the rolling body (8) abuts against the arc-shaped protrusion (7) on the first end face (5), and the small end face of the rolling body (8) abuts against the arc-shaped protrusion (7) on the second end face (6).

10. A wind turbine generator set, characterized in that: include: A wheel hub (12), a nacelle (13) and the tapered roller bearing according to claim 9, wherein the wheel hub (12) and the nacelle (13) are rotatably connected via the tapered roller bearing.

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