Sliding type yaw bearing device of wind turbine generator

Abstract

The utility model relates to the technical field of wind turbine generator equipment, and discloses a sliding type yaw bearing device of a wind turbine generator, which comprises an inner ring, an outer ring is rotationally arranged outside the inner ring, and a rolling body is mounted between the inner ring and the outer ring; an outer gear ring disc is fixed on the outer surface of the outer ring; a support frame is arranged above the inner ring; a driving device is installed on the supporting frame, and the supporting frame and the inner ring can be driven to rotate synchronously through the driving device. According to the sliding type yaw bearing device of the wind turbine generator, locking of the inner ring is achieved through mechanical structure design, the problem that movement stopping liquid is deteriorated due to long-term use is solved through the design, the stability and movement stopping performance of the bearing upper ring are ensured, a good working state can be kept even under the severe environment condition, and the service life of the bearing upper ring is prolonged. Extra resistance brought by the motion-stopping liquid is avoided, the risk of overheating is reduced when the gear speed reduction motor operates, and the service life of the gear speed reduction motor is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine equipment, specifically to a sliding yaw bearing device for wind turbines. Background Technology

[0002] With the continuous development of renewable energy, wind energy, as a clean and renewable energy source, has received widespread attention and application both domestically and internationally. As a key piece of equipment for wind energy conversion, the performance of wind turbine units directly affects the utilization efficiency and economic viability of wind energy resources. Within wind turbine units, the yaw system is a crucial component, responsible for adjusting the nacelle and rotor of the wind turbine unit according to changes in wind direction to achieve optimal wind energy capture.

[0003] According to the public announcement (CN209539514U), a sliding yaw bearing for wind turbines is disclosed. This technology discloses a technical solution including "the bearing being mounted on the frame, the bearing being used to support the tower of the wind turbine's yaw system, the yaw bearing including an upper bearing ring, rolling elements, a lower bearing ring, and a damping fluid, the lower bearing ring being fixedly mounted on the frame, the upper bearing ring being located directly above the lower bearing ring, the rolling elements being sandwiched between the upper and lower bearing rings, and the tower being vertically mounted in the center of the upper bearing ring, etc. It has the technical effect of setting an annular groove in the lower bearing ring and filling it with a shear-thickening non-Newtonian fluid, so that the damping plate cannot undergo minute instantaneous rotation in the shear-thickening non-Newtonian fluid, thereby preventing the tower from making small-angle instantaneous rotation under some disturbance factors."

[0004] While the above design prevents the upper bearing ring from rotating momentarily by using a disturbance plate and a damping fluid, the damping fluid is prone to deterioration after long-term use due to the harsh environment of the wind turbine nacelle. This reduces its damping performance and fails to effectively prevent momentary rotation of the upper bearing ring. Furthermore, the rotation of the upper bearing ring is subject to significant resistance during the operation of the wind turbine's yaw system, leading to severe overheating of the drive motor. Therefore, we propose a sliding yaw bearing device for wind turbine units to address these problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a sliding yaw bearing device for wind turbine units. This solves the problems of the harsh environment in the wind turbine nacelle, the tendency of the resisting liquid to deteriorate after long-term use, resulting in reduced resisting performance and inability to effectively prevent the upper ring from rotating instantaneously. Furthermore, when the wind turbine's own yaw system is in operation, the upper ring of the bearing experiences significant resistance during rotation, leading to severe overheating of the drive motor.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a sliding yaw bearing device for wind turbine generators, comprising an inner ring;

[0007] An outer ring is provided for rotation around the inner ring, and a rolling element is installed between the inner ring and the outer ring;

[0008] An outer gear ring is fixed to the outer surface of the outer ring;

[0009] A support frame is provided above the inner ring;

[0010] The support frame is equipped with a drive device, which can drive the support frame and the inner ring to rotate synchronously.

[0011] A damping disc is fixed to the outer surface of the outer ring;

[0012] The support frame is equipped with an abutment mechanism that can press down on the damping disc to lock the inner ring in place.

[0013] Preferably, the outer gear ring disc has multiple sets of mounting holes arranged in a ring at equal intervals on its bottom surface. The outer gear ring disc can be mounted on the tower through the mounting holes. The support frame has through holes on its surface. The support frame can be mounted on the frame assembly through the through holes.

[0014] Preferably, multiple sets of mounting seats are fixedly installed on the surface of the inner ring, and the support frame is installed on the multiple sets of mounting seats.

[0015] Preferably, the drive device includes multiple sets of geared motors mounted on the support frame and a yaw pinion mounted on the output end of the geared motors and meshing with the external gear ring disk.

[0016] Preferably, a connecting plate is fixedly installed on the surface of the support frame near the gear reducer motor, the gear reducer motor is mounted on the corresponding connecting plate surface by bolts, a first limiting plate is fixed on the surface of the support frame near the gear reducer motor, and the output end of the gear reducer motor is rotatably connected to the first limiting plate through a bearing.

[0017] Preferably, the abutment mechanism includes an annular plate disposed directly above the damping disc, and the support frame is provided with multiple sets of hydraulic cylinders for driving the annular plate to move.

[0018] Preferably, a rectangular plate is fixed to the surface of the support frame near the hydraulic cylinder, the hydraulic cylinder is fixed to the surface of the rectangular plate, a drive rod is fixed to the output end of the hydraulic cylinder, multiple sets of second limiting plates are fixed to the surface of the support frame, the second limiting plates are provided with limiting holes adapted to the drive rod, the drive rod can slide in the limiting holes of the second limiting plates, and the surface of the annular piece is fixed to one end of the multiple sets of drive rods.

[0019] Beneficial effects

[0020] This invention provides a sliding yaw bearing device for wind turbine generators. Compared with the prior art, it has the following advantages:

[0021] The sliding yaw bearing device of this wind turbine achieves locking of the inner ring through mechanical structure design. This design avoids the problem of deterioration of the resisting fluid due to long-term use, ensures the stability and resisting performance of the upper ring of the bearing, and can maintain good working condition even under harsh environmental conditions. It avoids the additional resistance caused by the resisting fluid, reduces the risk of overheating during operation of the gear reduction motor, and also extends the service life of the gear reduction motor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a structural cross-sectional view of the connecting parts, such as the inner and outer rings, of this utility model;

[0024] Figure 3 This is a right view of the overall structure of this utility model.

[0025] In the diagram: 101, Inner ring; 102, Outer ring; 103, Rolling element; 104, Mounting base; 105, Support frame; 106, External gear ring disc; 107, Damping disc; 2, Drive device; 201, Gear reducer motor; 202, Connecting plate; 203, Yaw pinion; 204, First limiting plate; 3, Contact mechanism; 301, Rectangular plate; 302, Hydraulic cylinder; 303, Drive rod; 304, Second limiting plate; 305, Annular plate. Detailed Implementation

[0026] 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.

[0027] like Figure 1-3 As shown:

[0028] A sliding yaw bearing device for a wind turbine includes an inner ring 101;

[0029] An outer ring 102 is provided for the outer rotation of the inner ring 101, and a rolling element 103 is installed between the inner ring 101 and the outer ring 102;

[0030] An outer gear ring disk 106 is fixed on the outer surface of the outer ring 102. Multiple sets of mounting holes are opened on the bottom of the surface of the outer gear ring disk 106 in an annular arrangement. The outer gear ring disk 106 can be installed on the tower through the mounting holes.

[0031] A support frame 105 is provided above the inner ring 101. The surface of the support frame 105 has a through hole. The support frame 105 can be installed on the frame assembly through the through hole. Multiple sets of mounting seats 104 are fixedly installed on the surface of the inner ring 101. The support frame 105 is installed on the multiple sets of mounting seats 104.

[0032] A drive device 2 is installed on the support frame 105, which can drive the support frame 105 and the inner ring 101 to rotate synchronously.

[0033] The drive unit 2 includes multiple sets of gear reducer motors 201 mounted on the support frame 105 and a yaw pinion 203 mounted on the output end of the gear reducer motors 201 and meshing with the external gear ring disk 106.

[0034] A connecting plate 202 is fixedly installed on the surface of the support frame 105 near the position of the gear reducer motor 201. The gear reducer motor 201 is installed on the surface of the corresponding connecting plate 202 by bolts. A first limiting plate 204 is fixed on the surface of the support frame 105 near the position of the gear reducer motor 201. The output end of the gear reducer motor 201 is rotatably connected to the first limiting plate 204 through a bearing.

[0035] A damping disk 107 is fixed on the outer surface of the outer ring 102. The damping disk 107 has a ring structure design.

[0036] The support frame 105 is equipped with a contact mechanism 3 that can press down on the damping disc 107 to engage it. The inner ring 101 can be locked in place by the contact mechanism 3.

[0037] The abutment mechanism 3 includes an annular plate 305 positioned directly above the damping disc 107, and a plurality of hydraulic cylinders 302 for driving the annular plate 305 to move are mounted on the support frame 105.

[0038] A rectangular plate 301 is fixed on the surface of the support frame 105 near the hydraulic cylinder 302. The hydraulic cylinder 302 is fixed on the surface of the rectangular plate 301. A drive rod 303 is fixed at the output end of the hydraulic cylinder 302. Multiple sets of second limiting plates 304 are fixed on the surface of the support frame 105. The second limiting plates 304 are provided with limiting holes that are adapted to the drive rod 303. The drive rod 303 can slide in the limiting holes provided in the second limiting plates 304. The surface of the annular plate 305 is fixed to one end of the multiple sets of drive rods 303.

[0039] In this implementation plan: When the wind turbine sliding yaw bearing device is in use, the outer gear ring disk 106 has an installation hole. The first bolt can pass through the installation hole to fix the outer gear ring disk 106 to the tower. At the same time, the support frame 105 also has a through hole. The second bolt passes through the through hole to connect and lock the support frame 105 to the frame assembly.

[0040] The control system of the wind turbine detects changes in wind direction through an anemometer (not shown in the figure). The control system issues a yaw command based on the wind direction information to start the gear reduction motor 201. The connecting plate 202 is used to install and fix the gear reduction motor 201.

[0041] When the gear reducer motor 201 is started, it drives the yaw pinion 203 to rotate. The yaw pinion 203 meshes with the outer gear ring disk 106, while the outer gear ring disk 106 is in a fixed state. The yaw pinion 203 meshes and rolls around the outer gear ring disk 106. At this time, the support frame 105 rotates through the inner ring 101 to adjust the direction of the wind turbine.

[0042] A first limiting plate 204 is also provided on the output end of the gear reducer motor 201. The first limiting plate 204 is fixed to the support frame 105, which can further limit the gear reducer motor 201 and improve the stability of the gear reducer motor 201 operation.

[0043] After the wind turbine is adjusted, the hydraulic cylinder 302 is operated, and the rectangular plate 301 is used to lock the connection between the hydraulic cylinder 302 and the support frame 105. The hydraulic cylinder 302 drives the drive rod 303 to move down, which in turn drives the annular plate 305 to move down, so that the annular plate 305 squeezes the damping disc 107. The squeezing friction generated can lock the position of the inner ring 101 rotating inside the outer ring 102, so that the inner ring 101 is stationary.

[0044] When the yaw system of the wind turbine itself needs to be operated, the hydraulic cylinder 302 runs in reverse, so that the annular plate 305 releases the pressure on the damping disc 107, so that no additional load is applied to the gear reduction motor 201 of the yaw system during this process.

[0045] This solution achieves the locking of the inner ring 101 through mechanical structure design. This design avoids the problem of the resisting fluid deteriorating due to long-term use, ensures the stability and resisting performance of the upper ring of the bearing, and can maintain good working condition even under harsh environmental conditions. It avoids the additional resistance brought by the resisting fluid, reduces the risk of overheating when the gear reducer motor 201 is running, and also extends the service life of the gear reducer motor 201.

[0046] While the hydraulic cylinder 302 drives the drive rod 303 to move, the drive rod 303 can slide within the limiting hole opened in the second limiting plate 304. The drive rod 303 can slide vertically up and down within the second limiting plate 304, which can perform lateral limiting, thereby improving the connection stability between the hydraulic cylinder 302 and the rectangular plate 301.

[0047] It should be noted that all electrical equipment involved in this product is powered by an external power source.

[0048] The working principle and usage process of this utility model: When the wind turbine sliding yaw bearing device is in use, the outer gear ring disk 106 has an installation hole. The first bolt can pass through the installation hole to fix the outer gear ring disk 106 to the tower. At the same time, the support frame 105 also has a through hole on its surface. The second bolt passes through the through hole to connect and lock the support frame 105 to the frame assembly.

[0049] The wind turbine's control system detects wind direction changes using an anemometer (not shown in the figure). Based on the wind direction information, the control system issues a yaw command, controlling the gear reduction motor 201 to start. The starting of the gear reduction motor 201 drives the yaw pinion 203 to rotate. The yaw pinion 203 meshes with the outer gear ring disk 106, which is in a fixed state. The yaw pinion 203 rotates around the outer gear ring disk 106. At this time, the support frame 105 rotates via the inner ring 101, adjusting the direction of the wind turbine. After the wind turbine's direction is adjusted, the hydraulic cylinder... The operation of 302 is achieved by the hydraulic cylinder 302 driving the drive rod 303 downward, which in turn drives the annular plate 305 downward, causing the annular plate 305 to squeeze the damping disc 107. The resulting squeezing friction can lock the inner ring 101 rotating inside the outer ring 102, keeping the inner ring 101 stationary. When the yaw system of the wind turbine needs to be operated, the hydraulic cylinder 302 reverses its direction, causing the annular plate 305 to release the squeezing of the damping disc 107. Thus, during this process, no additional load is placed on the gear reduction motor 201 of the yaw system.

[0050] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A wind turbine generator unit sliding yaw bearing apparatus characterized by: It comprises an inner ring (101); The outer surface of the outer ring (102) is fixed with an outer gear disc (106); The upper part of the inner ring (101) is provided with a support frame (105); The support frame (105) is installed with a driving device (2), which can drive the support frame (105) and the inner ring (101) to rotate synchronously; The outer surface of the outer ring (102) is fixed with a damping disc (107); The surface of the support frame (105) is provided with a through hole, and the support frame (105) can be installed on the rack group through the through hole. The surface of the inner ring (101) is fixedly installed with a plurality of mounting seats (104), and the support frame (105) is installed on the mounting seats (104).

2. The wind turbine generator set sliding yaw bearing arrangement of claim 1, wherein: The driving device (2) comprises a plurality of gear reduction motors (201) arranged on the support frame (105) and a yaw pinion (203) installed on the output end of the gear reduction motor (201) and meshing connected with the outer gear disc (106).

3. The wind turbine generator set sliding yaw bearing arrangement of claim 2, wherein: The surface of the support frame (105) is fixedly installed with a connecting plate (202) near the gear reduction motor (201), the gear reduction motor (201) is installed on the surface of the corresponding connecting plate (202) through bolts, and the surface of the support frame (105) is fixedly provided with a first limiting plate (204) near the gear reduction motor (201).

4. The wind turbine generator set sliding yaw bearing arrangement of claim 2, wherein: The abutting mechanism (3) comprises an annular sheet (305) arranged directly above the damping disc (107), and the support frame (105) is provided with a plurality of hydraulic cylinders (302) for driving the annular sheet (305) to move.

5. The wind turbine generator set sliding yaw bearing arrangement of claim 4, wherein: The surface of the support frame (105) is fixedly provided with a rectangular plate (301) near the hydraulic cylinder (302), the hydraulic cylinder (302) is fixed on the surface of the rectangular plate (301), the output end of the hydraulic cylinder (302) is fixedly provided with a driving rod (303), the surface of the support frame (105) is fixedly provided with a plurality of second limiting plates (304), the second limiting plates (304) are provided with limiting holes matched with the driving rods (303), the driving rods (303) can slide in the limiting holes of the second limiting plates (304), and the surface of the annular sheet (305) is fixedly provided with one end of a plurality of driving rods (303).

6. The wind turbine generator set sliding yaw bearing arrangement of claim 1, wherein: ​ 7. The wind turbine generator set sliding yaw bearing arrangement of claim 6, wherein: ​

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