Wind power bearing retainer and bearing

Abstract

The utility model discloses a wind power bearing retainer and a bearing, and belongs to the technical field of bearing retainers. The wind power bearing retainer is defined by at least two unit retainers, and each unit retainer comprises a first end plate, a second end plate and a third end plate, the second end plate is spaced from the first end plate by a preset distance and is concentrically arranged with the first end plate; one end of the window beam is connected with the first end plate, the other end of the window beam is connected with the second end plate, and a plurality of pockets are defined by the window beam, the first end plate and the second end plate; the limiting rods are perpendicular to the pockets and extend by a preset distance. The technical problem that a retainer of an existing vertical supporting unit is too large in movement deviation amplitude is solved.

Description

Technical Field

[0001] This utility model relates to the field of bearing cage technology, and in particular to a wind power bearing cage and bearing. Background Technology

[0002] Wind turbine main shaft bearings are key components of wind turbine generator sets. Their main function is to support the rotating parts of the wind turbine, ensuring the smooth rotation of the rotor and effectively converting wind energy into electrical energy. Wind turbine main shaft bearings typically include two types: sliding bearings and rolling bearings. Sliding bearings support the main shaft through sliding friction and have advantages such as simple structure and high load-bearing capacity; while rolling bearings reduce friction through the rolling of rolling elements, resulting in smooth operation and low noise.

[0003] One type of rolling wind turbine main shaft bearing is a three-row rolling element slewing bearing structure, which includes two rows of horizontal support units and a row of vertical support units between them. In current wind turbine bearings, the cage of the vertical support unit suffers from excessive movement offset during bearing rotation. Utility Model Content

[0004] The main purpose of this utility model is to provide a wind turbine bearing cage and bearing, which aims to solve the technical problem that the cage of the current vertical support unit has too large a range of motion offset.

[0005] To achieve the above objectives, the wind turbine bearing cage proposed in this utility model is formed by at least two unit cages, wherein the unit cage includes:

[0006] First end plate;

[0007] The second end plate is spaced at a predetermined distance from the first end plate and is arranged concentrically.

[0008] A window beam, one end of which is connected to the first end plate and the other end of which is connected to the second end plate, the window beam, the first end plate and the second end plate together form a plurality of pockets;

[0009] A limiting rod, which is perpendicular to the pocket and extends a predetermined distance.

[0010] Optionally, in one embodiment of the present invention, the limiting rod includes:

[0011] A rod, one end of which is connected to the window beam;

[0012] The abutting part is a semi-cylindrical structure, and the plane of the abutting part is connected to the rod body.

[0013] Optionally, in one embodiment of the present invention, a limiting bracket is further included, the limiting bracket being located on the side of the window beam opposite to the limiting rod.

[0014] Optionally, in one embodiment of the present invention, the limiting support includes:

[0015] A support body, which is connected to the window beam;

[0016] The support portion connects the bracket body to the window beam.

[0017] Optionally, in one embodiment of the present invention, the window beam includes an end beam and a middle beam. The end beam is located at both ends of the first end plate. The support body connected to the end beam is a unidirectional support body, and the support body connected to the middle beam is a bidirectional support body.

[0018] Optionally, in one embodiment of the present invention, the adjacent surfaces of the support body and the supporting portion are smoothly connected.

[0019] Optionally, in one embodiment of the present invention, the corners of the support body are rounded.

[0020] Optionally, in one embodiment of the present invention, the first end plate, the second end plate, the window beam, the limiting rod, and the limiting support are integrally formed.

[0021] Optionally, in one embodiment of the present invention, the pocket accommodates a rolling element, and the rolling element is a conical rolling element.

[0022] This utility model also proposes a bearing, including the wind power bearing cage described above.

[0023] Compared with existing technologies, this utility model can achieve at least the following beneficial effects. Because wind turbine bearings are relatively large, it is difficult to directly manufacture a cage corresponding to its size. Therefore, the cage proposed in this solution is a combined cage, which is formed by at least two unit cages. Each unit cage has a first end plate, a second end plate, a window beam, and a limiting rod structure. Specifically, the first end plate, the second end plate, and the window beam form the basic skeleton structure of the cage and enclose a pocket, which houses the rolling element. The cage restricts the running trajectory of the rolling element, ensuring that the rolling element rotates stably along a predetermined rolling path during bearing operation. However, because the cage will deviate to a certain extent during operation, it may come into contact with the inner or outer ring of the bearing, causing wear and other problems. Furthermore, when the cage deviates, its restraining effect on the rolling element will decrease, causing vibration and noise in the rolling element.

[0024] To address this, a limiting rod is installed to restrict the cage's offset. Specifically, the limiting rod is connected to the window beam. When the cage offsets, the limiting rod first contacts the inner ring of the bearing. Once this contact is established, the cage cannot offset further inwards. By installing the limiting rod, the contact area between the cage and the inner ring is reduced, and the offset position of the cage is limited, preventing the cage from moving excessively away from the rolling elements and thus reducing its restraining effect on the rolling elements. This solves the technical problem of excessive cage offset in vertical support units. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the wind turbine bearing cage of this utility model;

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of the wind turbine bearing cage of this utility model;

[0030] Figure 5 This is a rear view of the wind turbine bearing cage of this utility model.

[0031] Explanation of icon numbers:

[0032] 100, First end plate; 200, Second end plate; 300, Window beam; 310, End beam; 320, Intermediate beam; 400, Limiting rod; 410, Rod body; 420, Abutment part; 500, Limiting bracket; 510, Support body; 520, Supporting part;

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] Reference Figures 1-5 This utility model proposes a wind turbine bearing cage, characterized in that it is formed by at least two unit cages, each unit cage comprising:

[0039] First end plate 100;

[0040] The second end plate 200 is spaced at a predetermined distance from the first end plate 100 and is arranged concentrically.

[0041] Window beam 300, one end of which is connected to the first end plate 100 and the other end is connected to the second end plate 200. Window beam 300, the first end plate 100 and the second end plate 200 together form multiple pockets.

[0042] Limiting rod 400 is perpendicular to the pocket and extends a predetermined distance.

[0043] Due to the large size of wind turbine bearings, directly manufacturing a cage corresponding to their size is difficult. Therefore, the cage proposed in this solution is a composite cage, formed by at least two unit cages. Each unit cage has a first end plate 100, a second end plate 200, a window beam 300, and a limiting rod 400. Specifically, the first end plate 100, the second end plate 200, and the window beam 300 form the basic skeleton structure of the cage and enclose a pocket. The pocket accommodates the rolling elements and restricts their trajectory, ensuring stable rotation along a predetermined rolling path during bearing operation. Because the cage may deviate to some extent during operation, it may come into contact with the inner or outer ring of the bearing, causing wear and other problems. Furthermore, when the cage deviates, its restraining effect on the rolling elements decreases, causing vibration and noise.

[0044] To address this, a limiting rod 400 is installed to restrict the cage's offset. Specifically, the limiting rod 400 is connected to the window beam 300. When the cage offsets, the limiting rod 400 first contacts the inner ring of the bearing. Once in contact, the cage cannot offset further towards the inner ring. By installing the limiting rod 400, the contact area between the cage and the inner ring is reduced, and the offset position of the cage is limited, preventing the cage from moving excessively away from the rolling elements and thus reducing the restraining effect on the rolling elements. This solves the technical problem of excessive cage offset in vertical support units.

[0045] Optionally, limit rods 400 can be installed on both sides of the window beam 300 near the inner and outer rings of the bearing to prevent the cage from getting too close to the inner or outer ring of the bearing.

[0046] Specifically, the limiting rod 400 includes a rod body 410 and an abutment part 420. The rod body 410 is connected to the window beam 300, the abutment part 420 is a semi-cylindrical structure, and the plane of the abutment part 420 is connected to the rod body 410. The curved surface of the abutment part 420 faces the inner or outer ring of the bearing.

[0047] The curved surface contacts the inner or outer ring of the bearing, which further reduces the contact area and prevents excessive resistance and wear when the cage contacts the inner / outer ring. Similarly, the limiting rod 400 can also achieve the same purpose by not having the abutment part 420 and instead having a curved end that abuts against the inner / outer ring.

[0048] Furthermore, as a preferred embodiment, a limiting rod 400 is provided on the side of the window beam 300 near the inner ring, and a limiting support 500 is provided on the side near the outer ring. The limiting support 500 has the same function as the limiting rod 400, and can also prevent the cage from getting too close to the outer ring of the bearing.

[0049] Specifically, the limiting bracket 500 consists of a bracket body 510 and a supporting part 520. Both the limiting bracket 500 and the supporting part 520 have curved surfaces corresponding to the rolling element structure. Besides preventing the cage from excessively approaching the bearing outer ring, the limiting bracket 500 also functions to confine the rolling elements within the pocket. The supporting part 520 connects the window beam 300 and the bracket body 510, improving the connection stability between them and preventing the bracket body 510 from breaking and detaching from the cage after prolonged use. Since the rolling elements tend to move towards the bearing outer ring during cage rotation, the limiting bracket 500 is positioned on the side of the window beam 300 closest to the bearing outer ring to prevent the rolling elements from being thrown out during operation. Furthermore, the limiting bracket 500 also prevents the rolling elements from slipping out during overall bearing assembly, improving assembly efficiency.

[0050] Since the support body 510 of the limit support 500 needs to abut against the outer ring of the bearing, the corners of the support body 510 are rounded to prevent the bottom surface of the support body 510 from scratching the surface of the bearing outer ring when it contacts the bearing outer ring. In addition, the rounded corner design can also reduce the friction between the support body 510 and the outer ring when they contact each other.

[0051] In addition, to facilitate the installation of the rolling elements, the adjacent surfaces of the support body 510 and the support portion 520 are smoothly connected, so that the rolling elements can be stably supported by the limiting support 500.

[0052] Because the cage is a modular cage, the unit cages must make combined contact. To prevent the limiting support 500 of one unit cage from interfering with the other unit cage, the end beams 300 at both ends of the first end plate 100, i.e., the end beams 310, have unidirectional support bodies 510, while the support body 510 of the intermediate beam 320 is a bidirectional support body 510, which supports the rolling elements in the two adjacent pockets.

[0053] In addition, since the limiting rod 400 only serves to prevent the cage from getting too close to the inner ring of the bearing, it is not necessary to have a limiting rod 400 on every window beam 300. The number of limiting rods 400 can be reduced by designing them at intervals, thereby reducing the weight of the cage to a certain extent.

[0054] Furthermore, the unit cage is integrally molded. This reduces the connections between components and prevents defects such as weld seams, porosity, and slag inclusions that can occur during welding, which would reduce the product's strength and durability. Integral molding avoids these problems; the cage surface has no gaps or weak points, preventing moisture and salt spray from entering and causing internal corrosion.

[0055] Because tapered rolling elements have a strong load-bearing capacity, tapered rollers are selected as the rolling elements in this design, and the shape of the pocket corresponds to that of the rolling elements.

[0056] This utility model also proposes a bearing, which includes a cage, an inner ring, an outer ring, and rolling elements as described above. Specifically, the specific structure of the cage refers to the above embodiments. Since this bearing adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0057] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A wind turbine bearing cage, characterized in that, It is formed by at least two unit retainers, the unit retainers comprising: First end plate; The second end plate is spaced at a predetermined distance from the first end plate and is arranged concentrically. A window beam, one end of which is connected to the first end plate and the other end of which is connected to the second end plate, the window beam, the first end plate and the second end plate together form a plurality of pockets; A limiting rod, which is perpendicular to the pocket and extends a predetermined distance.

2. The wind turbine bearing cage as described in claim 1, characterized in that, The limiting rod includes: A rod, one end of which is connected to the window beam; The abutting part is a semi-cylindrical structure, and the plane of the abutting part is connected to the rod body.

3. The wind turbine bearing cage as described in claim 1, characterized in that, It also includes a limiting bracket, which is located on the side of the window beam opposite to the limiting rod.

4. The wind turbine bearing cage as described in claim 3, characterized in that, The limiting support includes: A support body, which is connected to the window beam; The support portion connects the bracket body to the window beam.

5. The wind turbine bearing cage as described in claim 4, characterized in that, The window beam includes an end beam and a middle beam. The end beam is located at both ends of the first end plate. The support body connected to the end beam is a one-way support body, and the support body connected to the middle beam is a two-way support body.

6. The wind turbine bearing cage as described in claim 4, characterized in that, The support body and the adjacent surface of the supporting part are smoothly connected.

7. The wind turbine bearing cage as described in claim 4, characterized in that, The corners of the support body are rounded.

8. The wind turbine bearing cage as described in claim 3, characterized in that, The first end plate, the second end plate, the window beam, the limiting rod, and the limiting support are integrally formed.

9. The wind turbine bearing cage as described in claim 1, characterized in that, The pocket accommodates a rolling element, which is a conical rolling element.

10. A bearing, characterized in that, Includes the wind turbine bearing cage as described in any one of claims 1-9.

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