Detachable shaft shoulder thrust bearing

Abstract

The utility model relates to the technical field of wind power main shafts, in particular to a detachable shaft shoulder thrust bearing which comprises a wind power main shaft body, a halfpace is arranged on the wind power main shaft body, a shaft shoulder thrust bearing set is fixedly installed on the side table top of the halfpace, and a gasket is assembled between the shaft shoulder thrust bearing set and the halfpace. The gasket is connected with the halfpace and the shaft shoulder thrust bearing sheet in a fastening manner through a long-rod bolt; a rolling bearing or a sliding bearing in sliding fit is arranged on the side part of the shaft shoulder thrust bearing pack; and the rolling bearing and the sliding bearing can be sleeved outside the wind power main shaft body through a bearing seat. Multi-scheme maintenance operation can be carried out according to the abrasion degree of the shaft shoulder thrust bearing piece, so that the maintenance cost is reduced, only the gasket or the shaft shoulder thrust bearing piece needs to be replaced during maintenance, the maintenance process is simplified, the maintenance time is shortened, the maintenance cost is further controlled, the continuous and efficient development of the wind power industry is facilitated, and the economic benefit is increased. Therefore, the method has a very wide application prospect.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine main shaft technology, and specifically discloses a detachable shoulder thrust bearing. Background Technology

[0002] The wind turbine main shaft is one of the core components of a wind turbine generator set. Its main function is to convert the mechanical energy of the rotating wind turbine into electrical energy. The wind turbine main shaft connects the blades and the generator, and through the gear system, it transfers the kinetic energy of the blades to the generator, which generates electrical energy and ultimately supplies it to the power grid.

[0003] In actual operation, the wind turbine main shaft is affected by various wind direction changes and internal operating conditions such as gearboxes or generators, requiring the wind turbine main shaft bearings to withstand various changing loads such as radial and axial forces. To improve the stability of the wind turbine main shaft, the bearings used in the wind turbine main shaft need to be axially positioned regularly to effectively prevent axial movement of the bearings. Currently, the wind turbine main shaft is fixedly equipped with a shoulder, which is forged together with the main shaft to facilitate bearing mounting. When maintenance personnel perform regular maintenance on the wind turbine main shaft, the bearings need to be removed, resulting in a long maintenance time and the loss of some power resources. Furthermore, a single maintenance personnel can only perform maintenance work on 2-4 wind turbine generators per day, resulting in low maintenance efficiency. Therefore, multiple people need to work simultaneously, which increases maintenance costs and is not conducive to the sustainable and efficient development of the wind power industry. Utility Model Content

[0004] To address the issues of long maintenance times and high maintenance costs in current wind turbine main shaft maintenance, this utility model provides a detachable shoulder thrust bearing.

[0005] To solve the above problems, this utility model provides the following technical solution:

[0006] A detachable shoulder thrust bearing includes a wind turbine main shaft body. A ladder is provided on the wind turbine main shaft body. A shoulder thrust bearing assembly is fixedly installed on the side surface of the ladder. The shoulder thrust bearing assembly is composed of multiple shoulder thrust bearing plates arranged in a linear axial array. A gasket is fitted between the shoulder thrust bearing assembly and the ladder. The gasket is fastened to the ladder and the shoulder thrust bearing plates by long bolts. A slidingly fitted rolling bearing or sliding bearing is provided on the side of the shoulder thrust bearing assembly. Both the rolling bearing and the sliding bearing can be mounted on the outside of the wind turbine main shaft body via bearing seats. A first oil inlet is provided on the outer ring of the rolling bearing, which can be connected to the side cavity of the shoulder thrust bearing assembly through the rolling bearing. A second oil inlet is provided on the outer ring of the sliding bearing, which can be connected to the side cavity of the shoulder thrust bearing assembly through the sliding bearing.

[0007] Preferably, the ladder platform has a through first threaded hole, which is threadedly engaged with a long rod bolt.

[0008] Preferably, the connection between the bottom side of the ladder and the main body of the wind turbine is a rounded corner.

[0009] Preferably, a distance sensor is fixedly installed on the side of the ladder platform, the distance sensor facing the shoulder thrust bearing assembly, and the distance sensor has a second threaded hole for easy passage of a long bolt.

[0010] Preferably, the wind turbine main shaft body is provided with a mating surface, which can contact a rolling bearing or a sliding bearing.

[0011] Preferably, the sliding bearing is provided with a dovetail block, which is engaged with the bearing housing.

[0012] Preferably, the sliding bearing has a retention groove, and the second oil inlet is arranged inside the retention groove.

[0013] Preferably, the sliding bearing has an oil outlet arranged along the circumferential direction of the wind turbine main shaft body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Compared with the prior art, this utility model separates the wind turbine main shaft body from the original shaft shoulder design and redesigns the matching structure of the ladder platform, shims, and shaft shoulder thrust bearing plate group. This can effectively avoid damage to the wind turbine main shaft body caused by bearing compression. At the same time, the design of transition fillets can prevent stress concentration, which not only increases the stability of the structure, but also reduces the processing quality requirements of the wind turbine main shaft body.

[0016] 2. The overall structure of this utility model is relatively flexible, which can optimize the internal space of the bearing housing, reduce the number of parts, and by designing the first oil inlet and the second oil inlet, the lubricating oil from the high-pressure oil pump can directly enter the oil passage of the bearing housing, avoiding the need to configure an additional oil pipe outside the bearing housing, thereby reducing the potential risks of lubricating oil leakage and component damage and maintenance.

[0017] 3. This utility model is easy to maintain. Multiple maintenance options can be implemented based on the wear of the shoulder thrust bearing plate, thereby reducing maintenance costs. During maintenance, only the shim or the shoulder thrust bearing plate needs to be replaced, simplifying the maintenance process, shortening maintenance time, and further controlling maintenance costs. This is conducive to the sustainable and efficient development of the wind power industry and therefore has a very broad application prospect. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the rolling bearing of this utility model according to its installation structure;

[0020] Figure 2 This is a cross-sectional view of the sliding bearing of this utility model according to its installation structure;

[0021] Figure 3 This is a schematic diagram of the transition fillet structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the gasket installation structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the distance sensor and the second threaded hole structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the dovetail block structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the retention groove structure of this utility model;

[0026] Figure 8 This is a schematic diagram of the oil outlet structure of this utility model;

[0027] In the diagram: 1. Wind turbine main shaft body, 2. Ladder platform, 3. Shoulder thrust bearing plate, 4. Shim, 5. Long bolt, 6. Rolling bearing, 7. Sliding bearing, 8. Bearing housing, 9. First oil inlet, 10. Second oil inlet, 11. First threaded hole, 12. Transition fillet, 13. Distance sensor, 14. Second threaded hole, 15. Mating surface, 16. Dovetail block, 17. Retention groove, 18. Oil outlet. Detailed Implementation

[0028] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0029] This specific embodiment provides a detachable shoulder thrust bearing, such as Figures 1-8 As shown. Figure 1 and Figure 2 The installation structures are for rolling bearings 6 and sliding bearings 7, respectively. Both installation structures include a wind turbine main shaft body 1, which is the main load-bearing structure of the integral bearing. A ladder 2 is provided on the wind turbine main shaft body 1, with the side ladder surface of the ladder 2 facing the outside of the wind turbine main shaft body 1. A shoulder thrust bearing assembly is fixedly installed on the side platform of the ladder 2. The shoulder thrust bearing assembly is composed of multiple shoulder thrust bearing pieces 3 arranged in a linear axial array. Each shoulder thrust bearing piece 3 is fitted around the wind turbine main shaft body 1, and the shoulder thrust bearing pieces 3 are stably connected in sequence. A gasket 4 is provided on the inner side of the shoulder thrust bearing piece 3 near the ladder 2. The gasket 4 is fastened to the ladder 2 and the shoulder thrust bearing piece 4 by long bolts 5, thereby stably installing the shoulder thrust bearing assembly around the wind turbine main shaft body 1.

[0030] The ladder platform is equipped with a distance sensor 13 fixedly mounted on its side. The distance sensor faces the shoulder thrust bearing assembly. The distance sensor 13 can measure the distance between itself and the adjacent shoulder thrust bearing piece 3 in real time, thereby facilitating the real-time judgment of the wear degree of the shoulder thrust bearing piece 3 during maintenance operations.

[0031] The ladder platform 2 has a through first threaded hole 11, and a long bolt 5 is installed in the first threaded hole 11. The first threaded hole 11 and the long bolt 5 are threaded together, thereby fixing the shoulder thrust bearing assembly and the washer 4 to the side of the ladder platform 2. The distance sensor 13 has a second threaded hole 14 to facilitate the passage of the long bolt 5, thereby enhancing the stability of the connection between the distance sensor 13 and the ladder platform 2.

[0032] The connection between the bottom side of the ladder platform 2 and the wind turbine main shaft body 1 is a transition fillet 12. The transition fillet 12 can be optimized according to the dimensions of the shoulder thrust bearing 3, rolling bearing 6, or sliding bearing 7, thereby reducing stress concentration and ensuring structural stability. The wind turbine main shaft body 1 is provided with a mating surface 15, which is arranged on one side of the transition fillet 12 and can contact the rolling bearing 6 or the sliding bearing 7.

[0033] Both the rolling bearing 6 and the sliding bearing 7 can be mounted on the outside of the wind turbine main shaft body 1 via the bearing housing 8. The bearing housing 8 can be provided with an oil inlet and a maintenance window. The oil inlet facilitates the supply of lubricating oil to the rolling bearing 6 or the sliding bearing 7, while the maintenance window facilitates the entry of maintenance personnel, thereby facilitating the later replacement of the shoulder thrust bearing 3.

[0034] When the installed bearing is a rolling bearing 6, a first oil inlet 9 is provided on the outer ring of the rolling bearing 6. The first oil inlet 9 can be connected to the side cavity of the shoulder thrust bearing assembly through the rolling bearing 6, thereby providing lubricating oil to the shoulder thrust bearing assembly.

[0035] When the installed bearing is a sliding bearing 7, a dovetail block 16 is provided on the sliding bearing 7. The dovetail block 16 can be engaged with the bearing housing 8, thereby increasing the installation stability of the sliding bearing 7. A retention groove 17 is provided on the sliding bearing 8, and the second oil inlet 10 is arranged inside the retention groove 17, thereby facilitating the entry of lubricating oil. An oil outlet 18 is provided on the sliding bearing 7 along the circumferential direction of the wind turbine main shaft body 1, thereby facilitating the outflow of lubricating oil from the sliding bearing 7. If the flow of lubricating oil is not required, a screw plug can be installed at the oil outlet 18, thereby avoiding contamination of the internal oil passages of the sliding bearing 7.

[0036] The working principle of this utility model is as follows:

[0037] Maintenance personnel obtain spacing parameters in real time through distance sensor 13 to determine the wear degree of the shoulder thrust bearing 3. If the wear degree of the shoulder thrust bearing 3 is low, maintenance personnel can enter the bearing housing 8 through the bearing housing 8 and install a shim 4 on the innermost side of the shoulder thrust bearing 3 to temporarily provide support. This not only reduces maintenance time but also reduces maintenance costs. If the wear degree of the shoulder thrust bearing 3 is high, maintenance personnel can replace one or several shoulder thrust bearing 3 pieces individually to speed up maintenance time and avoid structural damage to the wind turbine main shaft body 1.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A detachable shoulder thrust bearing, comprising a wind turbine main shaft body (1), characterized in that, A ladder (2) is provided on the main body (1) of the wind turbine. A shoulder thrust bearing assembly is fixedly installed on the side platform of the ladder (2). The shoulder thrust bearing assembly is composed of multiple shoulder thrust bearing plates (3) arranged in a linear axial array. A gasket (4) is assembled between the shoulder thrust bearing assembly and the ladder (2). The gasket (4) is fastened to the ladder (2) and the shoulder thrust bearing plates (4) by long bolts (5). A sliding rolling bearing (6) or sliding bearing is provided on the side of the shoulder thrust bearing assembly. The bearing (7), the rolling bearing (6) and the sliding bearing (7) can be mounted on the outside of the wind turbine main shaft body (1) through the bearing housing (8). The outer ring of the rolling bearing (6) is provided with a first oil inlet (9). The first oil inlet (9) can be connected to the side cavity of the shoulder thrust bearing assembly through the rolling bearing (6). The outer ring of the sliding bearing (7) is provided with a second oil inlet (10). The second oil inlet (10) can be connected to the side cavity of the shoulder thrust bearing assembly through the sliding bearing (7).

2. The detachable shoulder thrust bearing according to claim 1, characterized in that, The ladder platform (2) has a through first threaded hole (11), which is threadedly engaged with the long rod bolt (5).

3. A detachable shoulder thrust bearing according to claim 1, characterized in that, The connection between the bottom side of the ladder (2) and the main body of the wind turbine shaft (1) is a transition fillet (12).

4. A detachable shoulder thrust bearing according to claim 1, characterized in that, A distance sensor (13) is fixedly installed on the side of the ladder (2). The distance sensor (13) faces the shoulder thrust bearing assembly. A second threaded hole (14) is provided on the distance sensor (13) to facilitate the passage of the long rod bolt (5).

5. A detachable shoulder thrust bearing according to claim 1, characterized in that, The wind turbine main shaft body (1) is provided with a mating surface (15), which can contact the rolling bearing (6) and the sliding bearing (7).

6. A detachable shoulder thrust bearing according to claim 1, characterized in that, The sliding bearing (7) is provided with a dovetail block (16), which is engaged with the bearing seat (8).

7. A detachable shoulder thrust bearing according to claim 1, characterized in that, The sliding bearing (8) is provided with a retention groove (17), and the second oil inlet (10) is arranged inside the retention groove (17).

8. A detachable shoulder thrust bearing according to claim 1, characterized in that, The sliding bearing (7) is provided with an oil outlet (18) arranged in the circumferential direction of the wind turbine main shaft body (1).

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