Zero adjustment device for blades of wind turbine generator
By combining a magnetic base and a laser with a universal joint, the problem of low precision and large error in zero-alignment of wind turbine blades has been solved, achieving high-precision and rapid zero-alignment, which is applicable to various types of wind turbine blades.
Patent Information
- Application Number
- CN202520565851.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-27
AI Technical Summary
The zero-alignment of wind turbine blades suffers from low precision and large errors. Furthermore, the fact that the inner ring of the pitch bearing and the zero mark on the blade are not on the same circumferential surface makes zero-alignment difficult, and relying heavily on visual inspection leads to significant mechanical errors.
The device uses a magnetic base and a laser combined with a universal joint. The magnetic base is attached to the metal working surface, and the universal joint allows for multi-angle adjustment of the connecting rod. Combined with the cross laser emitter, it is precisely aligned with the zero mark line of the blade and hub. The locking device fixes the angle of the connecting rod to ensure precise alignment.
It achieves a zero-adjustment accuracy of less than 0.1°, which is 92% higher than the traditional method, and the adjustment time is reduced by 90%. It has a wide range of applications and is suitable for various types of wind turbine blades.
Smart Images
Figure CN223839256U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wind turbine blade zeroing technology, specifically relating to a wind turbine blade zeroing adjustment device. Background Technology
[0002] Blade zeroing is a crucial step in the installation and maintenance of wind turbines. Its main function is to adjust the installation angle of the blades. To ensure accurate zero alignment, the blades need to be inspected and aligned periodically, and the blade angle adjusted. Current inspection methods involve rotating the blade around its own axis by a certain angle and visually aligning the zero mark on the blade with the zero mark on the hub. However, current wind turbine blade zeroing adjustments suffer from low precision. Furthermore, the zero mark on the inner ring of the pitch bearing and the zero mark on the blade are not on the same circumferential plane, making zeroing difficult. Moreover, relying heavily on visual inspection by commissioning personnel results in significant mechanical zeroing errors. Therefore, a wind turbine blade zeroing adjustment device is needed to solve these technical problems. Utility Model Content
[0003] To address the aforementioned deficiencies in existing technologies, this utility model provides a wind turbine blade zero-alignment adjustment device, comprising a magnetic base and a laser. The laser is connected to the magnetic base via a connecting frame. The connecting frame includes a first connecting rod and a second connecting rod. One end of the first connecting rod is connected to the magnetic base via a universal joint, and the other end of the first connecting rod is fixedly connected to a rotating shaft. The rotating shaft is rotatably connected to one end of the second connecting rod via a bearing. The rotating shaft and the second connecting rod are fitted with a locking component. The other end of the second connecting rod is connected to the laser via a second universal joint. The angles of the first and second connecting rods can be flexibly adjusted as needed, and the adjusted angles will not wobble or change. This is existing technology; for details, please refer to the universal joint of a car phone holder.
[0004] Preferably, the laser is a cross-shaped laser emitter.
[0005] Preferably, the locking component includes a screw, and the rotating shaft has a threaded hole along the axial direction that mates with the screw. One end of the screw is fixedly connected to a knob, and the other end of the screw extends into the threaded hole. A connecting tube is rotatably sleeved on the rotating shaft via a bearing. A rack is fixed on the inner wall of the connecting tube. Multiple through holes communicating with the threaded hole are evenly distributed circumferentially on the rotating shaft corresponding to the rack. Each through hole has a locking block that mates with the rack. A connecting plate is fixedly connected to the end of the locking block away from the rack. The inner walls of the through holes at both ends of the connecting plate are provided with grooves. The two ends of the connecting plate are slidably disposed in the corresponding grooves. A compression spring is provided at the end of the groove near the rack. The compression spring is fixedly connected to the connecting plate. A push plate is fixedly connected to the side of the connecting plate away from the rack. One end of the push plate extends into the threaded hole, and the side of the push plate near the screw is an inclined surface.
[0006] Preferably, the universal joint includes a ball joint and a bushing that mates with the ball joint. The bushing has an auxiliary locking structure, which includes a locking bolt. One end of the locking bolt extends into the bushing and is threaded into it. The inner wall of the bushing has a groove, and a matching arc-shaped pressure plate is provided in the groove. The pressure plate and the locking bolt extending into the bushing are rotatably connected by a bearing. A buffer anti-slip layer is fixed on the side of the pressure plate facing the ball joint. The side of the pressure plate connected to the locking bolt is always located in the groove, ensuring that the pressure plate does not rotate with the locking bolt but moves towards the ball joint when the locking bolt rotates, so that the buffer anti-slip layer presses the ball joint.
[0007] Preferably, the universal joint two includes a ball joint two and a bushing two that cooperates with the ball joint two. The bushing two is provided with an auxiliary locking structure two, which has the same structure as the auxiliary locking structure one.
[0008] Working Principle: The magnetic base firmly adheres to the metal working surface, providing stable support. Universal joint one connects the magnetic base and connecting rod one, allowing connecting rod one to be flexibly adjusted in multiple directions. Connecting rod two is hinged to connecting rod one, allowing not only multi-angle adjustment of connecting rod two's angle but also extending the total length between connecting rod one and connecting rod two within a certain range (i.e., flexibly adjusting the distance between the laser emitter and the magnetic base). Connecting rod two supports the laser and is connected to the laser via universal joint two, allowing for multi-angle adjustment of the laser. The locking mechanism secures connecting rod one and connecting rod two after adjustment, preventing changes in angle.
[0009] In use, the device can be attached to the inner surface of the wind turbine hub using the magnetic base as needed. Then, adjust the position of the cross laser emitter's probe so that the vertical beam of the cross laser is aligned with the 0° line inside the hub, and the horizontal beam remains parallel to the interface between the hub and the blades. Next, adjust the blades to change the pitch. When the 0° line inside the blade overlaps with the vertical beam of the cross laser, stop the blade pitch adjustment and set this position as the 0° position in the wind turbine control system, completing the zero-alignment adjustment of the wind turbine blades.
[0010] This invention also includes other components that enable the wind turbine blade zero-adjustment device to function properly, all of which are conventional techniques in the field. Furthermore, any devices or components not specified in this invention employ conventional techniques and equipment in the field.
[0011] The beneficial effects of this utility model are: high precision, with zero-alignment accuracy within 0.1°, which is 92% higher than the traditional zero-alignment method; high efficiency, reducing the zero-alignment time of a single blade to within 30 seconds, shortening the working time by 90% compared to the traditional method; good stability, with the magnetic base and universal joint working together, it can be installed at any position in the wind turbine hub according to the needs of the application scenario, allowing for 360° zero-alignment detection and adjustment; and wide applicability, applicable to various types of wind turbine blades, with broad applicability. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 This is a schematic diagram of the zero-adjustment device for wind turbine blades in Embodiment 1 of this utility model;
[0014] Figure 2 for Figure 1 The left view;
[0015] Figure 3 for Figure 1 A three-dimensional image;
[0016] Figure 4 This is a schematic diagram of the zero-adjustment device for wind turbine blades in Example 2;
[0017] Figure 5 for Figure 4 Left partial sectional view;
[0018] Figure 6 This is a schematic diagram of the locking component in this utility model;
[0019] Figure 7 for Figure 6 The state of the middle block when it engages with the rack.
[0020] In the diagram: 1. Magnetic base; 2. Universal joint one; 3. Knob; 4. Universal joint two; 5. Laser; 6. Connecting rod one; 7. Connecting rod two; 8. Auxiliary locking structure two; 9. Locking bolt one; 10. Ball head pin one; 11. Pressure plate; 12. Buffer anti-slip layer; 13. Rotating shaft; 14. Connecting pipe; 15. Screw; 16. Through hole; 17. Rack; 18. Compression spring; 19. Locking block; 20. Push plate; 21. Connecting plate. Detailed Implementation
[0021] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.
[0022] Example 1
[0023] like Figure 1-3 As shown, this utility model provides a zero-alignment device for wind turbine blades, including a magnetic base 1 and a laser 5. The magnetic base uses a strong magnetic material (such as a neodymium iron boron magnet), which can be firmly adsorbed onto the metal working surface, providing stable support. The laser 5 is connected to the magnetic base 1 through a connecting frame. The connecting frame includes a first connecting rod 6 and a second connecting rod 7. One end of the first connecting rod 6 is connected to the magnetic base through a universal joint 2, and the other end of the first connecting rod 6 is fixedly connected to a rotating shaft 13. The rotating shaft 13 is rotatably connected to one end of the second connecting rod 7 through a bearing. The rotating shaft 13 and the second connecting rod 7 are fitted with a locking device. The other end of the second connecting rod 7 is connected to the laser 5 through a second universal joint 4. The angles of the first and second universal joints can be flexibly adjusted as needed, and the angles will not wobble or change after adjustment. This is existing technology; for details, please refer to the universal joint of a car phone holder.
[0024] The laser 5 is a cross-shaped laser emitter, a high-precision optical alignment tool that emits horizontally and vertically intersecting laser lines to form a cross-shaped reference. By using cross-shaped laser technology, rapid and precise alignment of the blade angle can be achieved. Cross-shaped laser positioning offers higher accuracy, reducing the zero-error to within 0.1°.
[0025] During operation, the magnetic base 1 firmly adheres to the metal working surface, providing stable support. Universal joint 2 connects the magnetic base 1 and connecting rod 6, allowing for flexible adjustment of connecting rod 6 in multiple directions. Connecting rod 7 is hinged to connecting rod 6, allowing for multi-angle adjustment of its angle and extending the total length between connecting rods 6 and 7 within a certain range (i.e., flexibly adjusting the distance between the laser emitter and the magnetic base 1). Connecting rod 7 supports the laser 5 and is connected to it via universal joint 4, allowing for multi-angle adjustment of the laser 5. A locking mechanism secures connecting rods 6 and 7 after adjustment, preventing angle changes.
[0026] In use, the device can be attached to the inner surface of the wind turbine hub using the magnetic base 1 as needed. Then, adjust the position of the cross laser emitter's probe so that the vertical beam of the cross laser is aligned with the 0° line inside the hub, and the horizontal beam remains parallel to the interface between the hub and the blades. Next, adjust the blades to change the pitch. When the 0° line inside the blade overlaps with the vertical beam of the cross laser, stop the blade pitch adjustment and set this position as the 0° position in the wind turbine control system, completing the zero-alignment adjustment of the wind turbine blades.
[0027] Example 2
[0028] like Figure 4-5 As shown, this utility model provides a zero-adjustment device for wind turbine blades, including a magnetic base 1 and a laser 5. The magnetic base is made of a strong magnetic material (such as a neodymium iron boron magnet), which can be firmly adsorbed onto the metal working surface and provide stable support. The laser 5 is connected to the magnetic base 1 through a connecting frame. The connecting frame includes a connecting rod 6 and a connecting rod 7. One end of the connecting rod 6 is connected to the magnetic base through a universal joint 2. The other end of the connecting rod 6 is fixedly connected to a rotating shaft 13. The rotating shaft 13 is rotatably connected to one end of the connecting rod 7 through a bearing. The rotating shaft 13 and the connecting rod 7 are fitted with a locking component. The other end of the connecting rod 7 is connected to the laser 5 through a universal joint 4.
[0029] The laser 5 is a cross-shaped laser emitter.
[0030] The locking component includes a screw 15. The rotating shaft 13 has a threaded hole along its axial direction that mates with the screw 15. One end of the screw 15 is fixedly connected to a knob 3, and the other end of the screw 15 is tapered and extends into the threaded hole. A connecting tube 14 is rotatably mounted on the rotating shaft 13 via a bearing. A ring of gears 17 is fixed to the inner wall of the connecting tube 14. Multiple through holes 16 communicating with the threaded hole are evenly distributed circumferentially on the rotating shaft 13 corresponding to the gears 17. Each through hole 16 contains a locking block 19 that mates with the gears 17. A connecting plate 21 is fixedly connected to the end of the locking block 19 away from the rack 17. The inner walls of the corresponding through holes 16 at both ends of the connecting plate 21 are provided with grooves. The two ends of the connecting plate 21 are slidably disposed within the corresponding grooves. A compression spring 18 is provided at the end of the groove closest to the rack 17. The compression spring 18 is fixedly connected to the connecting plate 21. A push plate 20 is fixedly connected to the side of the connecting plate 21 away from the rack 17. One end of the push plate 20 extends into the threaded hole, and the side of the push plate 20 closest to the screw 15 is inclined. After adjusting the angles of connecting rod one and connecting rod two, the screw is inserted into the threaded hole by rotating the knob. As the screw extends into the threaded hole, it pushes the push plate, which in turn pushes the locking block to move out of the through hole. The locking block engages with the rack, preventing the connecting tube from rotating around the axis, thus providing effective positioning. When it is necessary to release the restriction, the reverse screw is rotated to remove the screw from the threaded hole. The locking block retracts into the through hole under the action of the compression spring, and the connecting tube rotates around the axis again.
[0031] During operation, the magnetic base 1 firmly adheres to the metal working surface, providing stable support. Universal joint 2 connects the magnetic base 1 and connecting rod 6, allowing for flexible adjustment of connecting rod 6 in multiple directions. Connecting rod 7 is hinged to connecting rod 6, allowing for multi-angle adjustment of its angle and extending the total length between connecting rods 6 and 7 within a certain range (i.e., flexibly adjusting the distance between the laser emitter and the magnetic base 1). Connecting rod 7 supports the laser 5 and is connected to it via universal joint 4, allowing for multi-angle adjustment of the laser 5. A locking mechanism secures connecting rods 6 and 7 after adjustment, preventing angle changes.
[0032] In use, the device can be attached to the inner surface of the wind turbine hub using the magnetic base 1 as needed. Then, adjust the position of the cross laser emitter's probe so that the vertical beam of the cross laser is aligned with the 0° line inside the hub, and the horizontal beam remains parallel to the interface between the hub and the blades. Next, adjust the blades to change the pitch. When the 0° line inside the blade overlaps with the vertical beam of the cross laser, stop the blade pitch adjustment and set this position as the 0° position in the wind turbine control system, completing the zero-alignment adjustment of the wind turbine blades.
[0033] Example 3
[0034] like Figure 1-7 As shown, this utility model provides a zero-adjustment device for wind turbine blades, including a magnetic base 1 and a laser 5. The magnetic base is made of a strong magnetic material (such as a neodymium iron boron magnet), which can be firmly adsorbed onto the metal working surface and provide stable support. The laser 5 is connected to the magnetic base 1 through a connecting frame. The connecting frame includes a connecting rod 6 and a connecting rod 7. One end of the connecting rod 6 is connected to the magnetic base through a universal joint 2. The other end of the connecting rod 6 is fixedly connected to a rotating shaft 13. The rotating shaft 13 is rotatably connected to one end of the connecting rod 7 through a bearing. The rotating shaft 13 and the connecting rod 7 are fitted with a locking component. The other end of the connecting rod 7 is connected to the laser 5 through a universal joint 4.
[0035] The laser 5 is a cross-shaped laser emitter.
[0036] The locking component includes a screw 15. The rotating shaft 13 has a threaded hole along its axial direction that mates with the screw 15. One end of the screw 15 is fixedly connected to a knob 3, and the other end of the screw 15 is tapered and extends into the threaded hole. A connecting tube 14 is rotatably mounted on the rotating shaft 13 via a bearing. A ring of gears 17 is fixed to the inner wall of the connecting tube 14. Multiple through holes 16 communicating with the threaded hole are evenly distributed circumferentially on the rotating shaft 13 corresponding to the gears 17. Each through hole 16 contains a locking block 19 that mates with the gears 17. A connecting plate 21 is fixedly connected to the end of the locking block 19 away from the rack 17. The inner wall of the corresponding through holes 16 at both ends of the connecting plate 21 is provided with a sliding groove. The two ends of the connecting plate 21 are respectively slidably disposed in the corresponding sliding groove. A compression spring 18 is provided at the end of the sliding groove near the rack 17. The compression spring 18 is fixedly connected to the connecting plate 21. A push plate 20 is fixedly connected to the side of the connecting plate 21 away from the rack 17. One end of the push plate 20 extends into the threaded hole. The side of the push plate 20 near the screw 15 is a bevel.
[0037] The universal joint 2 is provided with an auxiliary locking structure. The universal joint 2 includes a ball head pin 10 and a bushing that mates with the ball head pin 10. The bushing is provided with the auxiliary locking structure, which includes a locking bolt 9. One end of the locking bolt 9 extends into the bushing and is threaded into it. The inner wall of the bushing has a groove, and a matching arc-shaped pressure plate 11 is provided in the groove. The pressure plate 11 and the locking bolt 9 extending into the bushing are rotatably connected by a bearing. A buffer anti-slip layer 12 is fixed on the side of the pressure plate 11 facing the ball head pin 10. The buffer anti-slip layer 12 can be a silicone layer or a rubber layer. By tightening the locking bolt 9, the pressure plate is made to fit against the ball head pin, increasing the friction and preventing the ball head pin from losing its fastening effect and causing shaking after long-term use.
[0038] The universal joint 2 includes a ball joint 2 and a bushing 2 that mates with the ball joint 2. The bushing 2 is provided with an auxiliary locking structure 2 8, which is the same as the auxiliary locking structure 1.
[0039] During operation, the magnetic base 1 firmly adheres to the metal working surface, providing stable support. Universal joint 2 connects the magnetic base 1 and connecting rod 6, allowing for flexible adjustment of connecting rod 6 in multiple directions. Connecting rod 7 is hinged to connecting rod 6, allowing for multi-angle adjustment of its angle and extending the total length between connecting rods 6 and 7 within a certain range (i.e., flexibly adjusting the distance between the laser emitter and the magnetic base 1). Connecting rod 7 supports the laser 5 and is connected to it via universal joint 4, allowing for multi-angle adjustment of the laser 5. A locking mechanism secures connecting rods 6 and 7 after adjustment, preventing angle changes.
[0040] In use, the device can be attached to the inner surface of the wind turbine hub using the magnetic base 1 as needed. Then, adjust the position of the cross laser emitter's probe so that the vertical beam of the cross laser is aligned with the 0° line inside the hub, and the horizontal beam remains parallel to the interface between the hub and the blades. Next, adjust the blades to change the pitch. When the 0° line inside the blade overlaps with the vertical beam of the cross laser, stop the blade pitch adjustment and set this position as the 0° position in the wind turbine control system, completing the zero-alignment adjustment of the wind turbine blades.
[0041] The device used in this embodiment boasts high precision, with zero-alignment accuracy within 0.1°, representing a 92% improvement in precision compared to traditional zero-alignment methods; high efficiency, reducing the zero-alignment time for a single blade to within 30 seconds, shortening working time by 90% compared to traditional methods; good stability, as the magnetic base and universal joint work together, allowing for installation at any position within the wind turbine hub to perform 360° zero-alignment detection and adjustment according to the application scenario; and wide applicability, suitable for various types of wind turbine blades, demonstrating broad applicability.
[0042] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A wind turbine blade zero-alignment device, comprising a magnetic base and a laser, wherein the laser is connected to the magnetic base via a connecting frame, characterized in that: The connecting frame includes a connecting rod one and a connecting rod two. One end of the connecting rod one is connected to a magnetic base through a universal joint one. The other end of the connecting rod one is fixedly connected to a rotating shaft. The rotating shaft is rotatably connected to one end of the connecting rod two through a bearing. The rotating shaft and the connecting rod two are fitted with a locking component. The other end of the connecting rod two is connected to a laser through a universal joint two. The locking component includes a screw. A threaded hole, mates with the screw, is provided axially within the rotating shaft. One end of the screw is fixedly connected to a knob, and the other end extends into the threaded hole. A connecting tube is rotatably mounted on the rotating shaft via a bearing. A rack is fixed to the inner wall of the connecting tube. Multiple through holes, communicating with the threaded hole, are evenly distributed circumferentially on the rotating shaft corresponding to the rack. Each through hole contains a locking block that mates with the rack. A connecting plate is fixedly connected to the end of the locking block away from the rack. Sliding grooves are provided on the inner walls of the through holes at both ends of the connecting plate. Both ends of the connecting plate are slidably positioned within their respective sliding grooves. A compression spring is provided at the end of the sliding groove closest to the rack, and the compression spring is fixedly connected to the connecting plate. A push plate is fixedly connected to the side of the connecting plate away from the rack. One end of the push plate extends into the threaded hole, and the side of the push plate closest to the screw is an inclined surface.
2. The wind turbine blade zero-adjustment device according to claim 1, characterized in that: The laser is a cross-shaped laser emitter.
3. The wind turbine blade zero-adjustment device according to claim 1, characterized in that: The universal joint includes a ball joint and a bushing that mates with the ball joint. The bushing has an auxiliary locking structure, which includes a locking bolt. One end of the locking bolt extends into the bushing and is threaded into it. The inner wall of the bushing has a groove, and a matching arc-shaped pressure plate is provided in the groove. The pressure plate and the locking bolt extending into the bushing are rotatably connected by a bearing. A buffer anti-slip layer is fixed on the side of the pressure plate facing the ball joint.
4. The wind turbine blade zero-adjustment device according to claim 3, characterized in that: The universal joint two includes a ball joint two and a bushing two that mates with the ball joint two. The bushing two is provided with an auxiliary locking structure two, which has the same structure as the auxiliary locking structure one.