A wind power generation blade de-icing protection device

Abstract

The utility model relates to wind power equipment technical field discloses a wind power generation blade deicing protection device, including power generation fan blade, the inner wall fixedly connected with interlayer of power generation fan blade, the inner wall fixedly connected with crossbar of power generation fan blade, the outer surface rotationally connected with a plurality of shaft sleeves of crossbar, the outer surface fixedly connected with torsional spring of crossbar, the outer surface fixedly connected with support plate of shaft sleeve, the top fixedly connected with the protection board of support plate, the low temperature resistant spring of protection board bottom fixedly connected with, the billiard ball of protection board outer surface fixedly connected with, the rubber pad of protection board top fixedly connected with, in the utility model, through counterweight drive, the engagement tooth and the location pin clutch trigger, realize deicing action self -adaptation start -stop, torsional spring and low temperature resistant spring form double elastic force storage rebound, drive billiard ball high -speed impact ice layer and produce resonance with blade, the ice breaking force is big, deicing is thorough, can fastly peel off stubborn thick ice.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, and in particular to a de-icing and protection device for wind turbine blades. Background Technology

[0002] Blade de-icing protection devices play a crucial role in the operation of wind turbine generators. They rely on a purely mechanical centrifugal triggering structure to remove ice from the blade surface, thereby preventing icing from causing deterioration of blade aerodynamic performance, load imbalance, and structural damage. This ensures the stable and efficient operation of the wind turbine generator. Blade de-icing protection devices are mostly suitable for wind farms in high-altitude, high-humidity, and rainy / snowy environments.

[0003] When wind turbine blades operate in cold and humid environments, stubborn thick ice forms on their surface, blade de-icing protection devices are required. Existing protection devices are mostly integrated, fitted structures and single elastic rebound designs, which can easily lead to insufficient de-icing force and dispersed vibration effects. This makes it impossible to peel off stubborn thick ice, resulting in deterioration of blade aerodynamic performance, weight imbalance, and consequently, reduced power generation efficiency of wind turbine generators, increased blade structural fatigue, and even ice-throwing safety hazards and generator shutdown. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a wind turbine blade de-icing protection device, which aims to solve the problems of insufficient de-icing power, inability to peel off stubborn thick ice, poor operational reliability, and easy damage to the blades in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a wind turbine blade de-icing and protection device, comprising a turbine blade, a sandwich layer fixedly connected to the inner wall of the turbine blade, a crossbar fixedly connected to the inner wall of the turbine blade, multiple bushings rotatably connected to the outer surface of the crossbar, a torsion spring fixedly connected to the outer surface of the crossbar, a support plate fixedly connected to the outer surface of the bushings, a protective plate fixedly connected to the top of the support plate, a low-temperature resistant spring fixedly connected to the bottom of the protective plate, a ball fixedly connected to the outer surface of the protective plate, a rubber pad fixedly connected to the top of the protective plate, locking pins fixedly connected to the opposite ends of the multiple bushings, multiple drive rings rotatably connected to the outer surface of the crossbar, locking teeth fixedly connected to the outer surface of the multiple drive rings, multiple limiting blocks fixedly connected to the outer surface of the crossbar, compression springs fixedly connected to the outer surface of the multiple limiting blocks, a spiral spring fixedly connected to the inner wall of the drive ring, a connecting rod fixedly connected to the outer surface of the drive ring, and a counterweight fixedly connected to the bottom of the connecting rod.

[0006] As a further description of the above technical solution: The other end of the torsion spring is fixedly connected to the inner wall of the bushing, and the bottom end of the low-temperature resistant spring is fixedly connected to the outer surface of the interlayer.

[0007] As a further description of the above technical solution: The top of the rubber pad is slidably connected to the inner surface of the generator fan blade, and the outer wall of the locking tooth is engaged with the outer wall of the locking pin.

[0008] As a further description of the above technical solution: The other end of the compression spring is slidably connected to one end of the drive ring, and the other end of the spiral spring is fixedly connected to the outer surface of the crossbar.

[0009] As a further description of the above technical solution: The bottom of the generator fan blade is fixedly connected to a rotating base, and the outer surface of the rotating base is rotatably connected to a generator set.

[0010] As a further description of the above technical solution: The bottom of the generator set is fixedly connected to a tower, and the bottom of the tower is fixedly connected to a base.

[0011] As a further description of the above technical solution: The inner wall of the base is threaded with multiple mounting bolts, and the bottom ends of the multiple mounting bolts are fixedly connected to the foundation.

[0012] As a further description of the above technical solution: Each of the mounting bolts has a mounting nut threaded onto its outer surface, and each of the mounting nuts has a washer slidably connected to its bottom.

[0013] This utility model has the following beneficial effects: 1. In this utility model, automatic de-icing can be completed by relying on the centrifugal force generated by the rotation of the generator fan blades. There is no additional energy consumption, and the environmental adaptability is strong. It can work stably in high-altitude and remote wind farms. The de-icing action is adaptively started and stopped by the counterweight drive and the clutch tooth and the locking pin clutch trigger. The torsion spring and the low-temperature resistant spring form a double elastic storage and rebound, which drives the ball to hit the ice layer at high speed and resonate with the blades. The ice breaking force is large and the de-icing is thorough. It can quickly peel off stubborn thick ice.

[0014] 2. In this utility model, the rubber pad effectively buffers the impact and avoids damage to the inner wall of the generator blade. The limiting block and compression spring accurately limit the movement, and the spiral spring ensures smooth reset of the components. The overall movement is smooth and without jamming. The interlayer provides stable support for the internal components, which can greatly reduce the risk of load imbalance, shutdown and ice throwing caused by blade icing, extend the service life of the blade, and improve the operating safety and power generation efficiency of the wind turbine generator set. Attached Figure Description

[0015] Figure 1 This is a front perspective view of a wind turbine blade de-icing protection device proposed in this utility model; Figure 2 for Figure 1 Enlarged view of point A in the image; Figure 3 This is a cross-sectional view of a wind turbine blade for a de-icing and protection device for wind turbine blades proposed in this utility model. Figure 4 This is a partial structural diagram of a wind turbine blade de-icing and protection device proposed in this utility model; Figure 5 This is a cross-sectional view of the bushing of a wind turbine blade de-icing protection device proposed in this utility model. Figure 6 This is a cross-sectional view of the drive ring of a wind turbine blade de-icing protection device proposed in this utility model.

[0016] Legend: 1. Generator blade; 2. Jacket; 3. Crossbar; 4. Torsion spring; 5. Support plate; 6. Protective plate; 7. Low-temperature resistant spring; 8. Ball bearing; 9. Rubber pad; 10. Bushing; 11. Locking pin; 12. Drive ring; 13. Locking tooth; 14. Limiting block; 15. Compression spring; 16. Spiral spring; 17. Connecting rod; 18. Counterweight; 19. Rotating seat; 20. Generator unit; 21. Tower; 22. Base; 23. Mounting bolt; 24. Foundation; 25. Mounting nut; 26. Washer. Detailed Implementation

[0017] 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.

[0018] Please see Figure 4 , Figure 5 and Figure 6This utility model provides an embodiment of a wind turbine blade de-icing and protection device, comprising a turbine blade 1, a sandwich layer 2 fixedly connected to the inner wall of the turbine blade 1, a crossbar 3 fixedly connected to the inner wall of the turbine blade 1, a plurality of bushings 10 rotatably connected to the outer surface of the crossbar 3, a torsion spring 4 fixedly connected to the outer surface of the crossbar 3, a support plate 5 fixedly connected to the outer surface of the bushings 10, a protective plate 6 fixedly connected to the top of the support plate 5, a low-temperature resistant spring 7 fixedly connected to the bottom of the protective plate 6, and a ball bearing 8 fixedly connected to the outer surface of the protective plate 6. A rubber pad 9 is fixedly connected to the top of the plate 6. A locking pin 11 is fixedly connected to the far end of a plurality of bushings 10. A plurality of drive rings 12 are rotatably connected to the outer surface of the crossbar 3. A locking tooth 13 is fixedly connected to the outer surface of the plurality of drive rings 12. A plurality of limit blocks 14 are fixedly connected to the outer surface of the crossbar 3. A compression spring 15 is fixedly connected to the outer surface of the plurality of limit blocks 14. A spiral spring 16 is fixedly connected to the inner wall of the drive ring 12. A connecting rod 17 is fixedly connected to the outer surface of the drive ring 12. A counterweight block 18 is fixedly connected to the bottom of the connecting rod 17. Specifically, this device is installed inside the generator blade 1, relying on the centrifugal force generated when the wind turbine blade rotates to achieve purely mechanical automatic de-icing and protection. A sandwich layer 2 is fixed to the inner wall of the generator blade 1, providing a foundation for the installation and support of internal components. A crossbar 3 fixed to the inner wall serves as the core load-bearing shaft, externally connected to multiple bushings 10. A torsion spring 4 is fixedly connected between the crossbar 3 and the bushings 10, providing continuous reset torque for the bushings 10. A support plate 5 is fixed externally to the bushings 10, and a protective plate 6 is fixed to the upper end of the support plate 5. A low-temperature resistant material is connected between the bottom of the protective plate 6 and the sandwich layer 2. Spring 7, in conjunction with torsion spring 4, achieves double elastic reset, ensuring that the protective plate 6 stably adheres to the inner wall of the generator blade 1. A rubber pad 9 is fixed to the top of the protective plate 6, sliding in contact with the inner surface of the generator blade 1 to reduce friction and buffer impact. A ball 8 is fixed to the outer side of the protective plate 6, generating impact vibration as the protective plate 6 swings, breaking the ice layer on the blade surface. A locking pin 11 is fixed to the end of the bushing 10, engaging with the locking teeth 13 on the outer side of the drive ring 12 to achieve linkage between the drive and driven structures. A limiting block 14 is fixed to the outside of the crossbar 3, connecting the limiting block 14 to the drive ring 12. A compression spring 15 provides axial limiting and elastic reset for the drive ring 12. A spiral spring 16 is fixed to the inner wall of the drive ring 12, with the other end of the spiral spring 16 fixed to the crossbar 3, providing axial reset force for the drive ring 12. The outer side of the drive ring 12 is connected to a counterweight 18 via a connecting rod 17. When the blade rotates, the counterweight 18 drives the drive ring 12 to rotate under centrifugal force, causing the locking teeth 13 to push the locking pin 11, thereby causing the bushing 10, support plate 5, and protective plate 6 to deflect and compress the low-temperature resistant spring 7 and torsion spring 4 to complete the energy storage. As the blade speed gradually increases, the counterweight 18... The weight 18 causes the locking tooth 13 to gradually disengage from the locking pin 11 and drives the spiral spring 16 to store energy to provide a basis for the reset of the locking tooth 13. When the locking tooth 13 is completely disengaged from the locking pin 11, the protective plate 6 is released. The low-temperature spring 7 and the torsion spring 4 release power, causing the ball 8 to hit the ice surface to complete the ice breaking. At the same time, it hits and contacts the inner wall of the generator fan blade 1, generating resonance to further achieve de-icing. When the speed decreases, the spiral spring 16 releases its elastic force to drive the drive ring 12 and the locking tooth 13 to reset. The rubber pad 9 re-adheres the fan blade, completing the passive de-icing and protection cycle.

[0019] Please see Figure 1 , Figure 2 and Figure 3 The other end of the torsion spring 4 is fixedly connected to the inner wall of the bushing 10, the bottom end of the low-temperature resistant spring 7 is fixedly connected to the outer surface of the interlayer 2, the top of the rubber pad 9 is slidably connected to the inner surface of the generator fan blade 1, the outer wall of the locking tooth 13 is engaged with the outer wall of the locking pin 11, the other end of the compression spring 15 is slidably connected to one end of the drive ring 12, the other end of the spiral spring 16 is fixedly connected to the outer surface of the crossbar 3, the bottom of the generator fan blade 1 is fixedly connected to the rotating seat 19, and the outer surface of the rotating seat 19 is rotatably connected to the generator assembly 20. Specifically, one end of the torsion spring 4 is engaged with the crossbar 3, and the other end is fixed to the inner wall of the bushing 10, providing a stable rotational reset force for the bushing 10, so that the support plate 5 and the protective plate 6 can quickly return to their original positions after the action. The top end of the low-temperature resistant spring 7 is connected to the protective plate 6, and the bottom end is fixed to the outer surface of the interlayer 2, forming a double elastic reset structure with the torsion spring 4, which improves the action response and fit stability. The top of the rubber pad 9 is slidably connected to the inner surface of the generator blade 1, which plays a role in buffering and reducing friction, and avoids damage to the blade from rigid collisions. The outer wall of the locking tooth 13 and the outer wall of the locking pin 11 are engaged with each other to achieve reliable linkage between the drive ring 12 and the bushing 10. One end of the compression spring 15 is fixedly connected to the limiting block 14, and the other end is slidably connected to the drive ring 12 to limit and reset the drive ring 12. One end of the spiral spring 16 is fixedly connected to the inner wall of the drive ring 12, and the other end is fixed to the crossbar 3 to provide circumferential reset torque for the drive ring 12. The bottom of the generator blade 1 is fixed to the rotating seat 19, and the rotating seat 19 is rotatably connected to the generator set 20, which ensures that the blade rotates normally to generate electricity, while providing a stable working foundation for the de-icing device.

[0020] Please see Figure 1 and Figure 2 The bottom of the generator set 20 is fixedly connected to a tower 21, the bottom end of the tower 21 is fixedly connected to a base 22, the outer surfaces of multiple mounting bolts 23 are threaded with mounting nuts 25, the bottom of multiple mounting nuts 25 are slidably connected with washers 26, the inner wall of the base 22 is threaded with multiple mounting bolts 23, and the bottom ends of multiple mounting bolts 23 are fixedly connected to a foundation 24. Specifically, the bottom of the generator set 20 is fixedly connected to the tower 21, and the bottom of the tower 21 is fixed to the base 22, forming an overall support system that provides a stable installation foundation for the generator fan blades 1 and the internal de-icing device. Multiple mounting bolts 23 are threadedly connected to the inner wall of the base 22, and the bottom of the mounting bolts 23 is fixed to the foundation 24, firmly fixing the entire device to the foundation ground. Mounting nuts 25 are threadedly connected to the outer surface of the mounting bolts 23, and a slidable washer 26 is connected to the bottom of the mounting nut 25. The cooperation between the mounting nut 25 and the washer 26 improves the locking stability of the mounting bolts 23, prevents loosening, and ensures the safe and reliable operation of the whole machine.

[0021] Working principle: During de-icing, the centrifugal force generated by the rotation of the generator fan blade 1 automatically removes ice and provides protection. The interlayer 2 fixed to the inner wall of the generator fan blade 1 provides the mounting base for subsequent components. The outer surface of the crossbar 3 fixed to the inner wall of the generator fan blade 1 is rotatably connected to multiple bushings 10. The torsion spring 4 fixed between the crossbar 3 and the bushing 10 provides a continuous rotational reset torque for the bushing 10. The support plate 5 fixed to the outer surface of the bushing 10 is connected to the top of the protective plate 6. The low-temperature resistant spring 7 connected between the bottom of the protective plate 6 and the interlayer 2, together with the torsion spring 4, forms a double elastic reset structure, ensuring that the protective plate 6 stably fits against the inner wall of the generator fan blade 1 in the standby state. The rubber pad 9 on the top of the protective plate 6 slides against the inner surface of the generator fan blade 1. Contact reduces friction and buffers impact during component movement, preventing damage to the blades. The ball 8 fixed on its outer surface is used for ice breaking. The locking pin 11 fixed at the end of the bushing 10 engages with the locking teeth 13 on the outer surface of the drive ring 12 rotatably connected to the crossbar 3, realizing reliable linkage between the drive structure and the driven structure. The limiting block 14 fixed on the outer surface of the crossbar 3 is slidably connected to the drive ring 12 through the compression spring 15 on its outer surface, axially limiting the drive ring 12 and providing elastic restoring force. The spiral spring 16 fixed on the inner wall of the drive ring 12 provides axial restoring torque for the drive ring 12. The counterweight block 18 connected to the drive ring 12 through the connecting rod 17 is used to trigger the linkage between the mechanical structures. When the generator fan blade 1 rotates, the counterweight 18 drives the drive ring 12 to rotate under centrifugal force. The locking teeth 13 push the locking pin 11, thereby causing the bushing 10, support plate 5, and protective plate 6 to deflect synchronously. At the same time, the low-temperature spring 7 and torsion spring 4 are compressed to complete the energy storage. As the blade speed gradually increases, the centrifugal force increases, and the counterweight 18 drives the drive ring 12 to continue rotating, causing the locking teeth 13 to gradually disengage from the locking pin 11. At the same time, the spiral spring 16 is compressed to store energy, preparing for subsequent reset. When the locking teeth 13 are completely disengaged from the locking pin 11, the protective plate 6 is released, and the low-temperature spring 7 and torsion spring 4 are compressed to store energy. Spring 4 instantly releases the stored power, causing the protective plate 6 to rebound quickly. The ball 8 strikes the ice layer on the surface of the fan blade to break the ice. At the same time, the ball 8 impacts and contacts the inner wall of the generator fan blade 1, generating resonance to further enhance the de-icing effect. When the blade speed decreases and the centrifugal force weakens, the spiral spring 16 releases its elasticity, causing the drive ring 12 and the locking tooth 13 to reset. The locking tooth 13 re-engages with the locking pin 11, and the protective plate 6 resets under the action of the torsion spring 4 and the low-temperature resistant spring 7. The rubber pad 9 re-adheres the fan blade, completing one passive de-icing and protection cycle. Continuous de-icing can be achieved by continuously rotating the blade.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wind turbine blade de-icing protection device, comprising a turbine blade (1), characterized in that: The inner wall of the generator fan blade (1) is fixedly connected to a sandwich layer (2), and a crossbar (3) is fixedly connected to the inner wall of the generator fan blade (1). Multiple bushings (10) are rotatably connected to the outer surface of the crossbar (3). A torsion spring (4) is fixedly connected to the outer surface of the crossbar (3). A support plate (5) is fixedly connected to the outer surface of the bushings (10). A protective plate (6) is fixedly connected to the top of the support plate (5). A low-temperature resistant spring (7) is fixedly connected to the bottom of the protective plate (6). A ball (8) is fixedly connected to the outer surface of the protective plate (6). A rubber pad (9) is fixedly connected to the top of the protective plate (6). Each bushing (10) has a locking pin (11) fixedly connected to one of its opposite ends. The outer surface of the crossbar (3) is rotatably connected to multiple drive rings (12). The outer surfaces of the multiple drive rings (12) are fixedly connected to locking teeth (13). The outer surface of the crossbar (3) is fixedly connected to multiple limiting blocks (14). The outer surfaces of the multiple limiting blocks (14) are fixedly connected to compression springs (15). The inner wall of the drive ring (12) is fixedly connected to a spiral spring (16). The outer surface of the drive ring (12) is fixedly connected to a connecting rod (17). The bottom of the connecting rod (17) is fixedly connected to a counterweight (18).

2. The wind turbine blade de-icing protection device according to claim 1, characterized in that: The other end of the torsion spring (4) is fixedly connected to the inner wall of the bushing (10), and the bottom end of the low-temperature resistant spring (7) is fixedly connected to the outer surface of the interlayer (2).

3. The wind turbine blade de-icing protection device according to claim 1, characterized in that: The top of the rubber pad (9) is slidably connected to the inner surface of the generator fan blade (1), and the outer wall of the locking tooth (13) is engaged with the outer wall of the locking pin (11).

4. The wind turbine blade de-icing protection device according to claim 1, characterized in that: The other end of the compression spring (15) is slidably connected to one end of the drive ring (12), and the other end of the spiral spring (16) is fixedly connected to the outer surface of the crossbar (3).

5. The wind turbine blade de-icing protection device according to claim 1, characterized in that: The bottom of the generator fan blade (1) is fixedly connected to a rotating seat (19), and the outer surface of the rotating seat (19) is rotatably connected to a generator set (20).

6. The wind turbine blade de-icing protection device according to claim 5, characterized in that: The bottom of the generator set (20) is fixedly connected to a tower (21), and the bottom end of the tower (21) is fixedly connected to a base (22).

7. A wind turbine blade de-icing protection device according to claim 6, characterized in that: The inner wall of the base (22) is threaded with multiple mounting bolts (23), and the bottom ends of the multiple mounting bolts (23) are fixedly connected to the foundation (24).

8. A wind turbine blade de-icing protection device according to claim 7, characterized in that: The outer surfaces of the plurality of mounting bolts (23) are threaded with mounting nuts (25), and the bottoms of the plurality of mounting nuts (25) are slidably connected with washers (26).

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