Bearing for wind driven generator

Abstract

The utility model discloses a bearing for a wind driven generator, which relates to the technical field of bearings and comprises a bearing seat, a first circular groove, a second circular groove, a third circular groove, a fourth circular groove and a fifth circular groove are sequentially formed in the bearing seat from top to bottom, a connecting disc is arranged at the upper end of the bearing seat, and a main shaft is fixedly sleeved in the connecting disc. The main shaft extends into the fifth circular groove, a first tapered roller bearing is installed in the first circular groove, an upper sealing check ring is installed in the second circular groove, a first exposed framework auxiliary-lip-free sealing ring is arranged in the upper sealing check ring, a second tapered roller bearing is installed in the fourth circular groove, and a second exposed framework auxiliary-lip-free sealing ring is arranged in the second circular groove. And a lower sealing check ring is mounted in the fifth circular groove. According to the utility model, the third circular groove and the second through groove are matched together, so that grease can be stored, the requirement of frequently filling lubricating grease is reduced, the maintenance period of the bearing is prolonged, and the maintenance cost and the downtime are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a bearing for a wind turbine generator. Background Art

[0002] As the market demand for wind turbine bearings gradually increases, market risks of wind turbine bearings also exist at any time. The particularity of wind turbine bearings is reflected in the harsh operating environment and very high maintenance costs, which requires wind turbine bearings to have a very long service life. Generally, wind turbine bearings are required to be maintenance-free within 20 years. If damaged within 20 years, there will be very high maintenance costs. Therefore, many factors must be taken into consideration during the product design process, and excellence must be strived for in structural design and material selection to maximize the stability of the bearings and improve the service life of the bearings.

[0003] Existing bearings store a limited amount of grease, a key lubricant used to reduce friction between rolling and sliding parts. This limited grease storage can lead to insufficient lubrication, increasing friction and wear in the bearings and requiring more frequent repairs and replacements. Further improvements are needed, and a wind turbine bearing is proposed to address this issue. Utility Model Content

[0004] The main purpose of the present invention is to provide a bearing for a wind turbine generator, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A bearing for a wind turbine generator comprises a bearing seat, wherein the interior of the bearing seat is provided with a first circular groove, a second circular groove, a third circular groove, a fourth circular groove and a fifth circular groove in sequence from top to bottom, a connecting disk is provided at the upper end of the bearing seat, a main shaft is provided in the internal fixing sleeve of the connecting disk, and the main shaft extends into the fifth circular groove, a first tapered roller bearing is installed in the first circular groove, an upper sealing retaining ring is installed in the second circular groove, a first externally exposed skeleton without auxiliary lip sealing ring is provided in the upper sealing retaining ring, a second tapered roller bearing is installed in the fourth circular groove, a lower sealing retaining ring is installed in the fifth circular groove, a second externally exposed skeleton without auxiliary lip sealing ring is provided in the lower sealing retaining ring, and a spacer is provided in the second externally exposed skeleton without auxiliary lip sealing ring.

[0007] Preferably, the inner wall of the first circular groove is provided with a first through groove, the inner wall of the third circular groove is provided with a fifth through groove and a second through groove in sequence from top to bottom, the inner wall of the fourth circular groove is provided with a fourth through groove, and the inner wall of the fifth circular groove is provided with a third through groove, and the first through groove, the fifth through groove, the second through groove, the fourth through groove and the third through groove are all threadedly connected with screws.

[0008] Preferably, an oil pipe is provided in the fifth through groove, and the oil pipe extends to the upper end of the upper sealing retaining ring.

[0009] Preferably, the first tapered roller bearing and the second tapered roller bearing can be detachably mounted on the main shaft.

[0010] Preferably, the upper sealing retaining ring, the first externally exposed frame sealing ring without auxiliary lip and the inner wall surfaces of the spacer are all in active contact with the outer surface of the main shaft.

[0011] Preferably, the lower end of the first tapered roller bearing is movably connected to the upper end of the upper sealing retaining ring and the first externally exposed skeleton sealing ring without auxiliary lip.

[0012] Preferably, the lower end of the second tapered roller bearing is movably connected to the lower sealing ring, the second externally exposed frame-less auxiliary lip sealing ring and the upper end of the spacer.

[0013] Preferably, two locking nuts are provided on the threaded sleeve at the lower part of the outer cylindrical surface of the main shaft, a brake washer is provided between the two locking nuts, and the brake washer is movably sleeved on the main shaft.

[0014] Preferably, an annular groove is provided at the lower end of the connecting disk, a circular ring is movably sleeved in the annular groove, and the circular ring is mounted on the upper end of the bearing seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The third circular groove and the second through groove are used to store grease. A large amount of grease can be transported to the third circular groove through the second through groove. Adequate grease storage can provide stable lubrication for a long time, reduce the need for frequent grease filling, extend the maintenance cycle of the bearing, and thus reduce maintenance costs and downtime;

[0017] 2. The load-bearing capacity of the bearing can be improved by arranging the first tapered roller bearing and the second tapered roller bearing to cooperate with each other. The first tapered roller bearing and the second tapered roller bearing have good high load-bearing capacity, which makes it convenient for the bearing to be applied to high-load working conditions and improves the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the entire structure proposed in this embodiment;

[0019] Figure 2 Schematic diagram of the cross-sectional structure in this embodiment;

[0020] Figure 3 Schematic diagram of the cross-sectional structure of the bearing seat in this embodiment;

[0021] Figure 4Schematic diagram of the structure of the connecting disk and the main shaft in this embodiment;

[0022] Figure 5 Schematic diagram of the explosion structure in this embodiment.

[0023] In the figure: 1. bearing seat; 2. connecting plate; 3. main shaft; 4. first tapered roller bearing; 5. upper sealing ring; 6. first external exposed frame without auxiliary lip sealing ring; 7. screw; 8. oil pipe; 9. second tapered roller bearing; 10. lower sealing ring; 11. second external exposed frame without auxiliary lip sealing ring; 12. spacer; 13. locking nut; 14. brake washer; 15. ring; 16. first through groove; 17. second through groove; 18. third through groove; 19. fourth through groove; 20. fifth through groove; 21. first circular groove; 22. second circular groove; 23. third circular groove; 24. fourth circular groove; 25. fifth circular groove; 26. annular groove. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1-Figure 5As shown, a bearing for a wind turbine generator includes a bearing seat 1. The interior of the bearing seat 1 is provided with a first circular groove 21, a second circular groove 22, a third circular groove 23, a fourth circular groove 24 and a fifth circular groove 25 from top to bottom. A connecting plate 2 is provided at the upper end of the bearing seat 1. A plurality of screw holes are provided on the upper surfaces of the bearing seat 1 and the connecting plate 2. A main shaft 3 is fixedly sleeved inside the connecting plate 2. The diameter of the main shaft 3 decreases from top to bottom. The middle part of the main shaft 3 is tapered. The connecting plate 2 and the main shaft 3 are an integral structure. The main shaft 3 extends into the fifth circular groove 25. A first tapered roller bearing 4 is installed in the first circular groove 21. The second circular groove 22 is provided with a first tapered roller bearing 4. An upper sealing retainer ring 5 is installed inside, and a first externally exposed skeleton sealing ring 6 with no auxiliary lip is arranged in the upper sealing retainer ring 5, a second tapered roller bearing 9 is installed in the fourth circular groove 24, and a lower sealing retainer ring 10 is installed in the fifth circular groove 25, a second externally exposed skeleton sealing ring 11 with no auxiliary lip is arranged in the lower sealing retainer ring 10, and a spacer 12 is arranged in the second externally exposed skeleton sealing ring 11 with no auxiliary lip. The upper sealing retainer ring 5 is used to support the first tapered roller bearing 4, and the lower sealing retainer ring 10 is used to support the second tapered roller bearing 9. The first tapered roller bearing 4 and the second tapered roller bearing 9 have the same structure and are symmetrically distributed up and down.

[0028] When in use, install the connecting disc 2 on the gearbox, connect the connecting disc 2 to the rotating shaft of the fan blade, connect the main shaft 3 to the rotating shaft inside the gearbox through the locking nut 13, loosen the screw 7, and inject the butter into the inside of the bearing seat 1 through the first through groove 16, the second through groove 17 and the fourth through groove 19. A large amount of butter can be transported to the third circular groove 23 through the second through groove 17. Adequate butter storage can provide stable lubrication effect for a long time, reduce the need for frequent grease filling, extend the maintenance cycle of the bearing, and thus reduce maintenance costs and downtime.

[0029] In order to be able to inject grease into the bearing seat 1, a first through groove 16 is opened on the inner wall of the first circular groove 21, a fifth through groove 20 and a second through groove 17 are opened on the inner wall of the third circular groove 23 from top to bottom, a fourth through groove 19 is opened on the inner wall of the fourth circular groove 24, and a third through groove 18 is opened on the inner wall of the fifth circular groove 25. The first through groove 16, the fifth through groove 20, the second through groove 17, the fourth through groove 19 and the third through groove 18 are all threadedly connected with a screw 7.

[0030] An oil pipe 8 is provided in the fifth through groove 20 . The oil pipe 8 extends to the upper end of the upper sealing retaining ring 5 . The oil pipe 8 is used for conveying butter.

[0031] The first tapered roller bearing 4 and the second tapered roller bearing 9 are both detachably mounted on the main shaft 3. The first tapered roller bearing 4 and the second tapered roller bearing 9 are used to improve the bearing's load-bearing capacity. The first tapered roller bearing 4 and the second tapered roller bearing 9 have good high load-bearing capacity, making it convenient for the bearings to be applied to high-load working conditions and improving the stability of use.

[0032] The inner wall surfaces of the upper sealing retainer 5, the first externally exposed frame sealing ring without auxiliary lip 6 and the spacer 12 are all in active contact with the outer surface of the main shaft 3, the lower end of the first tapered roller bearing 4 is movably connected to the upper end of the upper sealing retainer 5 and the first externally exposed frame sealing ring without auxiliary lip 6, and the lower end of the second tapered roller bearing 9 is movably connected to the upper end of the lower sealing retainer 10, the second externally exposed frame sealing ring without auxiliary lip 11 and the spacer 12.

[0033] A locking nut 13 is provided on the threaded sleeve at the lower part of the outer cylindrical surface of the main shaft 3. A brake washer 14 is provided between the two locking nuts 13. The brake washer 14 is movably sleeved on the main shaft 3 to prevent the locking nut 13 from loosening.

[0034] In order to support the rotation of the connecting disk 2 and improve the rotation stability of the connecting disk 2, an annular groove 26 is opened at the lower end of the connecting disk 2. A ring 15 is movably sleeved in the annular groove 26. The ring 15 is installed on the upper end of the bearing seat 1.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A bearing for a wind turbine generator, comprising a bearing seat (1), characterized in that: The interior of the bearing seat (1) is provided with a first circular groove (21), a second circular groove (22), a third circular groove (23), a fourth circular groove (24) and a fifth circular groove (25) in sequence from top to bottom. A connecting plate (2) is provided at the upper end of the bearing seat (1). A main shaft (3) is fixedly sleeved inside the connecting plate (2). The main shaft (3) extends into the fifth circular groove (25). A first tapered roller bearing (4) is installed in the first circular groove (21). The second circular groove (23) is provided with a first tapered roller bearing (4). An upper sealing retainer ring (5) is installed in the groove (22), a first externally exposed frame without auxiliary lip sealing ring (6) is arranged in the upper sealing retainer ring (5), a second tapered roller bearing (9) is installed in the fourth circular groove (24), a lower sealing retainer ring (10) is installed in the fifth circular groove (25), a second externally exposed frame without auxiliary lip sealing ring (11) is arranged in the lower sealing retainer ring (10), and a spacer sleeve (12) is arranged in the second externally exposed frame without auxiliary lip sealing ring (11).

2. The bearing for a wind turbine generator according to claim 1, characterized in that: The inner wall of the first circular groove (21) is provided with a first through groove (16), the inner wall of the third circular groove (23) is provided with a fifth through groove (20) and a second through groove (17) in sequence from top to bottom, the inner wall of the fourth circular groove (24) is provided with a fourth through groove (19), and the inner wall of the fifth circular groove (25) is provided with a third through groove (18), and the first through groove (16), the fifth through groove (20), the second through groove (17), the fourth through groove (19) and the third through groove (18) are all threadedly connected with a screw (7).

3. The bearing for a wind turbine generator according to claim 2, characterized in that: An oil pipe (8) is provided in the fifth through groove (20), and the oil pipe (8) extends to the upper end of the upper sealing retaining ring (5).

4. The bearing for a wind turbine generator according to claim 1, characterized in that: The first tapered roller bearing (4) and the second tapered roller bearing (9) can both be detachably sleeved on the main shaft (3).

5. The bearing for a wind turbine generator according to claim 1, characterized in that: The inner wall surfaces of the upper sealing retaining ring (5), the first externally exposed skeleton sealing ring without auxiliary lip (6) and the spacer (12) are all in active contact with the outer surface of the main shaft (3).

6. The bearing for a wind turbine generator according to claim 1, characterized in that: The lower end of the first tapered roller bearing (4) is movably connected to the upper sealing retaining ring (5) and the upper end of the first externally exposed frame-less auxiliary lip sealing ring (6).

7. The bearing for a wind turbine generator according to claim 1, characterized in that: The lower end of the second tapered roller bearing (9) is movably connected to the lower sealing ring (10), the second externally exposed skeleton sealing ring without auxiliary lip (11) and the upper end of the spacer (12).

8. The bearing for a wind turbine generator according to claim 1, characterized in that: Two locking nuts (13) are threadedly sleeved on the lower part of the outer cylindrical surface of the main shaft (3), and a brake washer (14) is commonly arranged between the two locking nuts (13). The brake washer (14) is movably sleeved on the main shaft (3).

9. The bearing for a wind turbine generator according to claim 1, characterized in that: An annular groove (26) is provided at the lower end of the connecting disk (2), a circular ring (15) is movably sleeved in the annular groove (26), and the circular ring (15) is mounted on the upper end of the bearing seat (1) for the wind turbine generator.

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