A wind turbine yaw system vibration calibration and stabilization device

Abstract

The utility model relates to the technical field of wind turbine generator unit, especially a kind of wind turbine generator unit yaw system vibration calibration and stabilizing device, it include: yaw pedestal and vibration calibration mechanism, wherein: yaw pedestal, top is equipped with annular guide rail, annular guide rail inner side wall is opened with tooth slot, multiple guide posts are set at the edge of yaw pedestal with equal angle, guide post top end is connected through crossbeam, displacement sensor is embedded in the middle part of crossbeam;Vibration calibration mechanism includes the sliding block with the sliding fit of annular guide rail, the top of sliding block is fixed with bearing table, and driving motor is installed at the center of bearing table bottom surface, and driving motor output shaft is connected with the driving gear meshing with tooth slot, and bearing table top surface four corners are equipped with damping shock absorber, and damping shock absorber top end is connected with calibration platform, and calibration platform side is fixed with the guide sleeve sliding fit with guide post, and vibration calibration mechanism is installed with stabilizing component;It enhances the overall service life of yaw system, improves wind turbine generator unit running stability.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine generators, and in particular to a vibration calibration and stabilization device for the yaw system of a wind turbine generator. Background Technology

[0002] Wind power, as an important component of renewable energy, has been widely applied and developed globally. With the continuous advancement of wind power technology and the increasing capacity of individual units, the requirements for the operational reliability and maintenance efficiency of wind turbine units are also rising. The yaw system, as one of the key components of a wind turbine unit, is primarily responsible for adjusting the blade orientation according to changes in wind direction to ensure that the rotor is always in the optimal windward position, thereby maximizing power generation efficiency.

[0003] Traditional wind turbine yaw systems mostly employ mechanical or hydraulic transmission structures, using gear and rack meshing or hydraulic cylinders to achieve yaw action. While these designs meet basic functional requirements to some extent, in actual operation, traditional yaw systems lack effective vibration suppression mechanisms. Under high wind speeds or turbulent conditions, the unit is prone to significant vibrations, leading to unstable movement during yaw and affecting power generation efficiency. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this utility model provides a vibration calibration and stabilization device for the yaw system of a wind turbine.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses a vibration calibration and stabilization device for a wind turbine yaw system, comprising: a yaw base and a vibration calibration mechanism, wherein:

[0007] The yaw base has an annular guide rail on top, and the inner sidewall of the annular guide rail has a toothed groove. Multiple guide columns are set at equal angles at the edge of the yaw base. The top of the guide columns are connected by a crossbeam, and a displacement sensor is embedded in the middle of the crossbeam.

[0008] The vibration calibration mechanism includes a slider that slides in conjunction with a ring guide rail. A support platform is fixed on the top of the slider. A drive motor is installed at the center of the bottom surface of the support platform. The output shaft of the drive motor is connected to a drive gear that meshes with a tooth groove. Damping dampers are provided at the four corners of the top surface of the support platform. A calibration platform is connected to the top of the damping dampers. A guide sleeve that slides in conjunction with a guide column is fixed on the side of the calibration platform. The vibration calibration mechanism is equipped with a stabilizing component.

[0009] Furthermore, the stabilizing components include:

[0010] The stabilizing brackets are symmetrically arranged on both sides of the calibration platform. The end of the stabilizing bracket is connected to a stabilizing wheel via a rotating shaft. The stabilizing wheel makes rolling contact with the annular flange at the edge of the yaw base. The middle of the stabilizing bracket is connected to the side of the calibration platform via an adjusting screw. A preload spring is fitted on the adjusting screw.

[0011] Furthermore, a vibration sensor is installed on the top surface of the calibration platform. The vibration sensor is connected to an external controller via wires, and the controller is electrically connected to the drive motor.

[0012] Furthermore, the damping shock absorber includes an outer cylinder and an inner piston rod. The bottom end of the inner piston rod extends into the outer cylinder and is connected to a piston. The outer cylinder is filled with damping fluid, and a damping spring is sleeved on the outside of the inner piston rod.

[0013] Furthermore, a wear-resistant bushing is provided on the inner side of the slider, and the wear-resistant bushing is in contact with the surface of the annular guide rail. Both ends of the slider are provided with grease filling ports, which are connected to the wear-resistant bushing through internal oil passages.

[0014] Furthermore, the outer circumference of the stabilizing wheel is provided with a rubber buffer layer, the surface of which is provided with annular anti-slip texture, and the inside of the stabilizing wheel is provided with a bearing, the inner ring of which is interference-fitted with the shaft.

[0015] Furthermore, the inner wall of the guide sleeve is provided with a polytetrafluoroethylene wear-resistant layer.

[0016] Furthermore, the controller is connected to an alarm, which is fixed on the crossbeam. When the vibration value detected by the vibration sensor exceeds a preset threshold, the controller controls the alarm to sound an alarm.

[0017] In the above technical solution, the vibration calibration and stabilization device for the yaw system of a wind turbine provided by this utility model has the following beneficial effects:

[0018] The yaw base, serving as the fundamental support structure, is fixed to the top of the wind turbine tower. Its top annular guide rail slides in conjunction with the slider of the vibration calibration mechanism. The meshing transmission between the inner sidewall teeth of the annular guide rail and the drive gear ensures stable yaw rotation of the vibration calibration mechanism, guaranteeing smooth yaw operation. Multiple guide columns, evenly spaced along the edges of the yaw base, slide in conjunction with guide sleeves on the sides of the calibration platform. Combined with displacement sensors embedded in the middle of the crossbeam at the top of the guide columns, real-time monitoring of the calibration platform's positional deviation provides accurate positional parameters for vibration calibration. The vibration calibration mechanism, as the core component, connects to the calibration platform via damping shock absorbers at the four corners of the bearing platform's top surface. This allows for rapid absorption of vibration energy generated during yaw, reducing the impact of vibration on the calibration platform. Simultaneously, the drive motor can actively control the system based on vibration conditions. Combined with stabilization components, this further enhances the stability of the calibration platform during yaw, preventing lateral swaying. This achieves dynamic calibration and active control during yaw, significantly improving the operational reliability of the wind turbine yaw system and extending equipment lifespan. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments will be briefly described below.

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the axial side structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the yaw base structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the vibration calibration mechanism of this utility model;

[0024] Figure 5 This is an exploded structural diagram of the vibration calibration mechanism of this utility model;

[0025] Figure 6 This is a schematic diagram of the exploded structure of the stabilizing component of this utility model;

[0026] Figure 7 This is a cross-sectional structural schematic diagram of the damping shock absorber of this utility model;

[0027] The attached diagram is labeled as follows: 1. Yaw base; 11. Circular guide rail; 12. Guide column; 13. Crossbeam; 14. Displacement sensor; 2. Vibration calibration mechanism; 21. Slider; 22. Support platform; 23. Drive motor; 24. Drive gear; 25. Damping shock absorber; 251. Outer cylinder; 252. Inner piston rod; 253. Shock-absorbing spring; 26. Calibration platform; 27. Guide sleeve; 28. Vibration sensor; 3. Stabilizing component; 31. Stabilizing bracket; 32. Stabilizing wheel; 33. Adjusting screw; 34. Preload spring; 4. Alarm. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 7 As shown;

[0030] This utility model discloses a vibration calibration and stabilization device for a wind turbine yaw system, comprising: a yaw base 1 and a vibration calibration mechanism 2, wherein:

[0031] Yaw base 1 is the basic support structure of the entire device. It is fixedly installed on the top of the wind turbine tower to realize the yaw rotation function. The top of the yaw base 1 is provided with a ring guide rail 11. The inner side wall of the ring guide rail 11 is provided with toothed grooves. Multiple guide columns 12 are set at equal angles at the edge of the yaw base 1. The top of the guide column 12 is connected by a crossbeam 13. A displacement sensor 14 is embedded in the middle of the crossbeam 13.

[0032] The vibration calibration mechanism 2 is the core component for realizing dynamic calibration and active control during yaw. It includes a slider 21 that slides with the annular guide rail 11, a support platform 22 fixed on the top of the slider 21, a drive motor 23 installed at the center of the bottom surface of the support platform 22, a drive gear 24 that meshes with the tooth groove connected to the output shaft of the drive motor 23, damping dampers 25 are provided at the four corners of the top surface of the support platform 22, a calibration platform 26 is connected to the top of the damping damper 25, a guide sleeve 27 that slides with the guide column 12 is fixed on the side of the calibration platform 26, and a stabilizing component 3 is installed in the vibration calibration mechanism 2.

[0033] By adopting the above technical solution, the yaw base 1 serves as a basic support structure fixed to the top of the wind turbine tower. The annular guide rail 11 at its top slides into the slider 21 of the vibration calibration mechanism 2. Combined with the meshing transmission between the inner sidewall teeth of the annular guide rail 11 and the drive gear 24, stable yaw rotation of the vibration calibration mechanism 2 is achieved, ensuring smooth yaw operation. Multiple guide posts 12, evenly spaced along the edges of the yaw base 1, slide into the guide sleeves 27 on the sides of the calibration platform 26. Combined with the displacement sensor 14 embedded in the middle of the crossbeam 13 at the top of the guide posts 12, the position of the calibration platform 26 can be monitored in real time. The offset provides accurate position parameters for vibration calibration. The vibration calibration mechanism 2, as the core component, is connected to the calibration platform 26 through the damping shock absorbers 25 at the four corners of the top surface of the support platform 22. It can quickly absorb the vibration energy generated during yaw and reduce the impact of vibration on the calibration platform 26. At the same time, the drive motor 23 can realize active control according to the vibration situation. Together with the stabilization component 3, it further enhances the stability of the calibration platform 26 during yaw and avoids lateral swaying. Thus, dynamic calibration and active control during yaw are realized, which significantly improves the operational reliability of the wind turbine yaw system and extends the service life of the equipment.

[0034] As a preferred embodiment of the above technical solution, such as Figures 1 to 5 As shown, the stabilizing component 3 includes:

[0035] Stabilizing brackets 31 are symmetrically arranged on both sides of the calibration platform 26. Stabilizing wheels 32 are connected to the ends of stabilizing brackets 31 via rotating shafts. Stabilizing wheels 32 are in rolling contact with the annular flange at the edge of the yaw base 1. The middle part of stabilizing brackets 31 is connected to the side of the calibration platform 26 via adjusting screws 33. A pre-tightening spring 34 is sleeved on the adjusting screws 33.

[0036] In this embodiment, the stabilizing wheels 32 at the ends of the stabilizing brackets 31 symmetrically arranged on both sides of the calibration platform 26 roll in contact with the annular flange at the edge of the yaw base 1, which can limit the lateral sway of the calibration platform 26. The middle part of the stabilizing bracket 31 is connected to the calibration platform 26 through the adjusting screw 33. With the help of the pre-tightening spring 34 sleeved on the adjusting screw 33, the contact tightness between the stabilizing wheel 32 and the annular flange can be adjusted by the pre-tightening force, ensuring that the stabilizing wheel 32 always rolls in close contact with the annular flange. This does not affect the smoothness of the yaw rotation, and can effectively counteract the lateral force during yaw, reduce the positional displacement caused by vibration, and work together with the damping shock absorber 25 to improve the dynamic stability of the calibration platform 26.

[0037] As a preferred embodiment of the above technical solution, such as Figures 1 to 6 As shown, a vibration sensor 28 is provided on the top surface of the calibration platform 26. The vibration sensor 28 is connected to an external controller via a wire, and the controller is electrically connected to the drive motor 23.

[0038] In this embodiment, the vibration sensor 28 on the top surface of the calibration platform 26 can monitor the vibration data of the calibration platform 26 in real time during the yaw process, and transmit the signal to the external controller through the wire. The controller can accurately adjust the operating state of the drive motor 23 according to the vibration data to realize active feedback control of vibration. When the vibration sensor 28 detects abnormal vibration, the controller can adjust the speed or output torque of the drive motor 23 in time, and work with the damping shock absorber 25 and the stabilizing component 3 to quickly suppress the vibration, improve the dynamic stability of the calibration platform 26, ensure the accuracy of the yaw system vibration calibration, and enhance the operational reliability of the wind turbine during the yaw process.

[0039] As a preferred embodiment of the above technical solution, such as Figures 6 to 7 As shown, the damping shock absorber 25 includes an outer cylinder 251 and an inner piston rod 252. The bottom end of the inner piston rod 252 extends into the outer cylinder 251 and is connected to a piston. The outer cylinder 251 is filled with damping fluid, and a shock-absorbing spring 253 is sleeved on the outside of the inner piston rod 252.

[0040] In this embodiment, the piston at the bottom of the inner piston rod 252 moves within the outer cylinder 251 filled with damping fluid. The viscous resistance of the damping fluid dissipates vibration energy, achieving rapid attenuation of high-frequency vibrations. The damping spring 253 on the outside of the inner piston rod 252 can buffer low-frequency vibration impacts and absorb vibration kinetic energy through elastic deformation. The synergistic effect of the two significantly improves the damping effect on vibrations of different frequencies, effectively reducing the impact of vibrations on the calibration platform 26. Combined with the feedback control of the stabilizing component 3 and the vibration sensor 28, the stability of the calibration platform 26 during yaw is further enhanced.

[0041] As a preferred embodiment of the above technical solution, such as Figures 1 to 6 As shown, the inner side of the slider 21 is provided with a wear-resistant bushing, which is in contact with the surface of the annular guide rail 11. Both ends of the slider 21 are provided with grease filling ports, which are connected to the wear-resistant bushing through internal oil passages.

[0042] In this embodiment, the wear-resistant bushing on the inner side of the slider 21 is in contact with the surface of the annular guide rail 11 to enhance the wear resistance of the sliding contact between the slider 21 and the annular guide rail 11, reduce frictional loss during long-term yaw motion, and extend the service life of both. The grease filling ports at both ends of the slider 21 are connected to the wear-resistant bushing through internal oil passages, which facilitates the periodic addition of grease to the contact area between the wear-resistant bushing and the annular guide rail 11, reduces sliding friction resistance, and ensures that the yaw rotation of the vibration calibration mechanism 2 along the annular guide rail 11 is smoother and more stable, reducing additional vibration caused by uneven friction.

[0043] As a preferred embodiment of the above technical solution, such as Figures 1 to 5As shown, the outer circumferential surface of the stabilizing wheel 32 is provided with a rubber buffer layer, and the surface of the rubber buffer layer is provided with annular anti-slip texture. The stabilizing wheel 32 is provided with a bearing inside, and the inner ring of the bearing is interference-fitted with the shaft.

[0044] In this embodiment, the rubber buffer layer on the outer circumference of the stabilizing wheel 32 can buffer the impact force when it contacts the annular stop edge of the yaw base 1, reducing vibration transmission. The annular anti-slip texture on the surface of the rubber buffer layer can enhance the contact friction force, prevent relative sliding between the stabilizing wheel 32 and the annular stop edge, and ensure stable lateral limiting effect. The bearing inside the stabilizing wheel 32 is interference-fitted with the rotating shaft, which can reduce the frictional resistance when the stabilizing wheel 32 rotates, making it yaw more smoothly with the calibration platform 26, reducing the impact of additional resistance on the stability of the calibration platform 26, and improving the smoothness of operation of the stabilizing component 3.

[0045] As a preferred embodiment of the above technical solution, such as Figures 1 to 3 As shown, the inner wall of the guide sleeve 27 is provided with a polytetrafluoroethylene wear-resistant layer;

[0046] In this embodiment, the polytetrafluoroethylene wear-resistant layer on the inner wall of the guide sleeve 27 has a low coefficient of friction and high wear resistance, which can reduce frictional loss when it slides with the guide post 12, ensuring that the calibration platform 26 slides smoothly along the guide post 12 and improving the accuracy of position monitoring.

[0047] As a preferred embodiment of the above technical solution, such as Figure 2 As shown, the controller is connected to an alarm 4, which is fixed on the crossbeam 13. When the vibration value detected by the vibration sensor 28 exceeds the preset threshold, the controller controls the alarm 4 to sound an alarm.

[0048] In this embodiment, the alarm 4 connected to the controller is fixed on the crossbeam 13. When the vibration value detected by the vibration sensor 28 exceeds the preset threshold, the controller can promptly control the alarm 4 to issue an alarm, which can quickly remind the operation and maintenance personnel that the yaw system has abnormal vibration, making it convenient to intervene in troubleshooting and handling in a timely manner, avoiding damage to the components of the calibration platform 26 due to excessive vibration, and reducing the risk of failure of the wind turbine yaw system.

[0049] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A vibration calibration and stabilization device for a wind turbine yaw system, characterized in that, include: Yaw base (1) and vibration calibration mechanism (2), wherein: Yaw base (1) with an annular guide rail (11) on top. The inner sidewall of the annular guide rail (11) is provided with toothed grooves. Multiple guide posts (12) are provided at equal angles at the edge of the yaw base (1). The top of the guide posts (12) is connected by a crossbeam (13). A displacement sensor (14) is embedded in the middle of the crossbeam (13). The vibration calibration mechanism (2) includes a slider (21) that slides in cooperation with the annular guide rail (11). A support platform (22) is fixed on the top of the slider (21). A drive motor (23) is installed at the center of the bottom surface of the support platform (22). The output shaft of the drive motor (23) is connected to a drive gear (24) that meshes with the tooth groove. Damping dampers (25) are provided at the four corners of the top surface of the support platform (22). A calibration platform (26) is connected to the top of the damping damper (25). A guide sleeve (27) that slides in cooperation with the guide column (12) is fixed on the side of the calibration platform (26). The vibration calibration mechanism (2) is equipped with a stabilizing component (3).

2. The vibration calibration and stabilization device for the yaw system of a wind turbine as described in claim 1, characterized in that, The stabilizing component (3) includes: A stabilizing bracket (31) is symmetrically arranged on both sides of the calibration platform (26). The end of the stabilizing bracket (31) is connected to a stabilizing wheel (32) via a rotating shaft. The stabilizing wheel (32) makes rolling contact with the annular flange of the yaw base (1). The middle part of the stabilizing bracket (31) is connected to the side of the calibration platform (26) via an adjusting screw (33). A preload spring (34) is sleeved on the adjusting screw (33).

3. The vibration calibration and stabilization device for the yaw system of a wind turbine as described in claim 1, characterized in that, The calibration platform (26) is equipped with a vibration sensor (28) on its top surface. The vibration sensor (28) is connected to an external controller via a wire. The controller is electrically connected to the drive motor (23).

4. The vibration calibration and stabilization device for the yaw system of a wind turbine as described in claim 1, characterized in that, The damping shock absorber (25) includes an outer cylinder (251) and an inner piston rod (252). The bottom end of the inner piston rod (252) extends into the outer cylinder (251) and is connected to a piston. The outer cylinder (251) is filled with damping fluid, and a shock-absorbing spring (253) is sleeved on the outside of the inner piston rod (252).

5. The vibration calibration and stabilization device for the yaw system of a wind turbine as described in claim 1, characterized in that, The slider (21) is provided with a wear-resistant bushing on its inner side. The wear-resistant bushing is in contact with the surface of the annular guide rail (11). Both ends of the slider (21) are provided with grease filling ports, which are connected to the wear-resistant bushing through internal oil passages.

6. The vibration calibration and stabilization device for the yaw system of a wind turbine as described in claim 2, characterized in that, The outer circumference of the stabilizing wheel (32) is provided with a rubber buffer layer, and the surface of the rubber buffer layer is provided with annular anti-slip texture. The stabilizing wheel (32) is provided with a bearing inside, and the inner ring of the bearing is interference-fitted with the shaft.

7. The vibration calibration and stabilization device for the yaw system of a wind turbine as described in claim 1, characterized in that, The inner wall of the guide sleeve (27) is provided with a polytetrafluoroethylene wear-resistant layer.

8. The vibration calibration and stabilization device for the yaw system of a wind turbine as described in claim 3, characterized in that, The controller is connected to an alarm (4), which is fixed on the crossbeam (13). When the vibration value detected by the vibration sensor (28) exceeds a preset threshold, the controller controls the alarm (4) to issue an alarm.

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