A blade brake device for wind turbine maintenance

Abstract

The scheme discloses a kind of wind turbine maintenance blade brake device for wind turbine maintenance technical field, including base, adjusting assembly and extrusion component, the upper surface of base is equipped with recess, recess is rotatably connected with annular carousel, carousel is rotatably connected with annular collar, the bottom of base is equipped with through-hole, through-hole is coaxial with collar and is communicated;Adjusting assembly includes first rack, second rack, gear and power piece, extrusion component includes multiple extrusion rods and second spring, multiple extrusion rods are distributed in the end of carousel away from collar, the side of base facing carousel is equipped with annular limit slot, multiple installation grooves are equipped in base, multiple second springs are located in installation groove respectively, multiple extrusion rods extend into installation groove through limit slot, the part of extrusion rod in installation groove is resisted in one end of second spring.The brake device of the application can effectively reduce the damage of blade inertia to rotating shaft.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine maintenance technology, and specifically relates to a blade braking device for wind turbine maintenance. Background Technology

[0002] A wind turbine is a power device that converts wind energy into mechanical work, which drives a rotor to rotate and ultimately outputs alternating current. To improve power generation efficiency and ensure the safety of wind turbines, regular maintenance and repairs are typically performed on the wind turbine units.

[0003] To ensure the safety of personnel, maintenance and repair of wind turbines typically require braking the turbine's shaft to stop the blades from rotating. During blade braking, the large size and weight of the blades result in significant inertia. Forced braking can easily damage the hub and shaft, shortening their service life. Summary of the Invention

[0004] The present invention aims to provide a blade braking device for wind turbine maintenance, so as to reduce the damage to the shaft caused by blade inertia during blade braking.

[0005] The blade braking device for wind turbine maintenance in this solution includes a base, an adjustment component and a pressing component. The upper surface of the base is provided with a groove, and an annular turntable is rotatably connected in the groove. An annular collar is rotatably connected in the turntable. The bottom of the base is provided with a through hole, which is coaxial with and connected to the collar.

[0006] The adjustment assembly includes a first rack, a second rack, a gear, and a power component that drives the first rack to rise and fall. The turntable has a blind hole on the side facing the collar. The second rack is slidably connected in the blind hole. A slider is fixedly connected to the end of the second rack facing the opening of the blind hole. A first spring is fixedly connected to the slider. A limit rod is fixedly connected to the end of the first spring away from the slider. A limit hole is provided on the end of the collar facing the turntable for the limit rod to pass through. A guide hole is provided on the top of the turntable. The first rack is vertically slidably connected in the guide hole. The power component is fixedly connected to the turntable. The gear is installed in the blind hole and meshes with the second rack.

[0007] The extrusion assembly includes multiple extrusion rods and a second spring matching the number of extrusion rods. The multiple extrusion rods are evenly distributed on the end of the turntable away from the collar. The base has an annular limiting groove on the side facing the turntable. The base has multiple mounting grooves communicating with the limiting groove. The mounting grooves are arc-shaped. Multiple second springs are located in the mounting grooves respectively. The multiple extrusion rods extend into the mounting grooves through the limiting grooves. The part of the extrusion rod located in the mounting groove abuts against one end of the second spring.

[0008] The working principle and beneficial effects of this solution are as follows: During use, the base is installed on the nacelle of the wind turbine, and then the collar is fixedly connected to the wind turbine's shaft. When braking of the wind turbine blades is required, the power component drives the first rack to rise. The rising first rack drives the gear to rotate counterclockwise, which in turn pushes the second rack, slider, first spring, and limit rod to move towards the collar. The limit rod abuts against the outer wall of the collar. When the limit hole on the collar rotates to the limit rod, under the elastic action of the first spring, the limit rod extends into the limit groove, thus connecting the collar and the turntable together. During blade rotation, the shaft, collar, and turntable rotate together. At this time, the turntable drives the compression rod to act on the second spring. The second spring acts as a buffer, avoiding rigid braking of the shaft and helping to reduce damage to the shaft caused by blade inertia.

[0009] Furthermore, the power component is a cylinder, a hydraulic cylinder, or a jack. The lifting and lowering of the first rack is driven by a cylinder, hydraulic cylinder, or jack, making operation convenient and performance reliable.

[0010] Furthermore, a fixing plate is fixedly connected to the top of the first rack, and the output end of the power component is fixedly connected to the fixing plate.

[0011] Furthermore, a connecting plate is rotatably connected to the turntable, and a support rod is fixedly connected to the base. A mounting plate is threaded onto the support rod, and the mounting plate is equipped with locking bolts for connecting the connecting plate. Through the arrangement of the connecting plate, mounting plate, and locking bolts, when full braking of the blades is required, the connecting plate and mounting plate are rotated to be on the same vertical plane, and then fixed together by the locking bolts. This ensures the fixed connection between the collar, turntable, base, and the nacelle of the wind turbine, preventing rotation of the shaft and blades, and achieving full braking.

[0012] Furthermore, the bottom of the base is integrally formed with a flange. This flange allows for better connection to the wind turbine nacelle.

[0013] Furthermore, the flange is evenly distributed with fixing screws. These fixing screws allow for easy connection or disconnection of the base from the wind turbine nacelle. Attached Figure Description

[0014] Figure 1 This is a top view of a blade braking device for wind turbine maintenance according to Embodiment 1 of the present invention;

[0015] Figure 2 This is a sectional view of the main drawing of a blade braking device for wind turbine maintenance according to Embodiment 1 of the present invention;

[0016] Figure 3 for Figure 2 Enlarged view of point A;

[0017] Figure 4 This is a sectional view of the main drawing of a blade braking device for wind turbine maintenance according to Embodiment 2 of the present invention. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method:

[0019] The reference numerals in the accompanying drawings include: flange 1, second spring 2, mounting groove 3, fixing screw 4, limiting groove 5, pressing rod 6, turntable 7, collar 8, through hole 9, first rack 10, base 11, jack 12, fixing plate 13, support rod 14, limiting hole 15, limiting rod 16, first spring 17, slider 18, second rack 19, gear 20, blind hole 21, connecting plate 22, locking bolt 23, mounting plate 24.

[0020] Example 1 is basically as shown in the appendix. Figures 1-3 As shown: A blade braking device for wind turbine maintenance includes a base 11, an adjustment component and a pressing component. The bottom of the base 11 is integrally formed with a flange 1. Fixed screws 4 for connecting the nacelle are evenly distributed on the flange 1. The upper surface of the base 11 is provided with a groove. An annular turntable 7 is rotatably connected in the groove. An annular collar 8 is rotatably connected in the turntable 7. The bottom of the base 11 is provided with a through hole 9. The through hole 9 communicates with the collar 8. The through hole 9, the collar 8 and the turntable 7 are coaxial.

[0021] The adjustment assembly includes a first rack 10, a second rack 19, a gear 20, and a jack 12 that drives the first rack 10 to rise and fall. The jack 12 is installed on the top of the turntable 7. The turntable 7 has a blind hole 21 on the side facing the collar 8. The second rack 19 is horizontally slidably connected in the blind hole 21. A slider 18 is fixedly connected to the end of the second rack 19 facing the opening of the blind hole 21. A first spring 17 is fixedly connected to the slider 18. The first spring 17 is horizontally set. A limit rod 16 is fixedly connected to the end of the first spring 17 away from the slider 18. The end of the limit rod 16 away from the spring is a hemispherical arc surface. The collar 8 has a limit hole 15 for the limit rod 16 to pass through on the end facing the turntable 7. The top of the turntable 7 has a guide hole. The first rack 10 is vertically slidably connected in the guide hole. A fixing plate 13 is fixedly connected to the top of the first rack 10. The output end of the jack 12 is fixedly connected to the fixing plate 13. The gear 20 is installed in the blind hole 21 and meshes with the second rack 19.

[0022] The extrusion assembly includes twelve extrusion rods 6 and twelve second springs 2. The twelve extrusion rods 6 are evenly distributed on the end of the turntable 7 away from the collar 8 and are fixedly connected to it. The base 11 has an annular limiting groove 5 on the side facing the turntable 7. The base 11 has multiple mounting grooves 3 that communicate with the limiting grooves 5. The mounting grooves 3 and the limiting grooves 5 are on the same horizontal plane. There are twelve mounting grooves 3, all of which are arc-shaped. The twelve second springs 2 are located in the twelve mounting grooves 3 respectively. The twelve extrusion rods 6 extend into the mounting grooves 3 through the limiting grooves 5. The part of the extrusion rod 6 located in the mounting groove 3 abuts against one end of the second spring 2.

[0023] Example 2 is attached. Figure 4 As shown, the only difference between this and Embodiment 1 is that: a connecting plate 22 is rotatably connected to the turntable 7, a support rod 14 is fixedly connected to the base 11, a mounting plate 24 is threadedly connected to the support rod 14, and a locking bolt 23 for connecting the connecting plate 22 is provided on the mounting plate 24.

[0024] Taking Example 2 as an example, the specific implementation process is as follows: In use, the base 11 is installed on the nacelle of the wind turbine by the fixing screw 4 on the flange 1, and then the collar 8 is fixedly connected to the rotating shaft of the wind turbine. When it is necessary to brake the blades of the wind turbine, the jack 12 drives the first rack 10 to rise. The rise of the first rack 10 drives the gear 20 to rotate counterclockwise, thereby pushing the second rack 19, the slider 18, the first spring 17 and the limiting rod 16 to move towards the collar 8. At this time, the first spring 17 is compressed, and the limiting rod 16 abuts against the outer wall of the collar 8. When the limiting hole 15 on the collar 8 rotates to the limiting rod 16, under the elastic action of the first spring 17, the limiting rod 16 extends into the limiting groove 5, thereby connecting the collar 8 and the turntable 7 together. At this time, during the rotation of the blade, the blade drives the rotating shaft, collar 8 and turntable 7 to rotate together. The turntable 7 drives the pressing rod 6 to act on the second spring 2. The second spring 2 plays a buffering role. When the blade stops, the connecting plate 22 and the mounting plate 24 are rotated so that they are on the same vertical plane. Then, the locking bolt 23 is used to fix them to achieve complete braking.

[0025] After the maintenance and repair of the wind turbine is completed, the jack 12 is operated to drive the first rack 10 to descend. The first rack 10 drives the gear 20 to rotate clockwise, which in turn drives the second rack 19, slider 18, spring, and limit rod 16 to move into the blind hole 21. At this time, the turntable 7 is disengaged from the collar 8, and the blades can drive the shaft and collar 8 to rotate normally.

[0026] When another inspection is required, simply unscrew the locking bolt 23 and repeat the above operation.

[0027] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A blade braking device for wind turbine maintenance, characterized in that: It includes a base, an adjustment component, and a pressing component. The upper surface of the base is provided with a groove, and an annular turntable is rotatably connected in the groove. An annular collar is rotatably connected in the turntable. The bottom of the base is provided with a through hole, which is coaxial with and connected to the collar. The adjustment assembly includes a first rack, a second rack, a gear, and a power component that drives the first rack to rise and fall. The turntable has a blind hole on the side facing the collar. The second rack is slidably connected in the blind hole. A slider is fixedly connected to the end of the second rack facing the opening of the blind hole. A first spring is fixedly connected to the slider. A limit rod is fixedly connected to the end of the first spring away from the slider. A limit hole is provided on the end of the collar facing the turntable for the limit rod to pass through. A guide hole is provided on the top of the turntable. The first rack is vertically slidably connected in the guide hole. The power component is fixedly connected to the turntable. The gear is installed in the blind hole and meshes with the second rack. The extrusion assembly includes multiple extrusion rods and a second spring matching the number of extrusion rods. The multiple extrusion rods are evenly distributed on the end of the turntable away from the collar. The base has an annular limiting groove on the side facing the turntable. The base has multiple mounting grooves communicating with the limiting groove. The mounting grooves are arc-shaped. Multiple second springs are located in the mounting grooves respectively. The multiple extrusion rods extend into the mounting grooves through the limiting grooves. The part of the extrusion rod located in the mounting groove abuts against one end of the second spring.

2. The blade braking device for wind turbine maintenance according to claim 1, characterized in that: The power component is a cylinder, a hydraulic cylinder, or a jack.

3. The blade braking device for wind turbine maintenance according to claim 2, characterized in that: A fixing plate is fixedly connected to the top of the first rack, and the output end of the power component is fixedly connected to the fixing plate.

4. A blade braking device for wind turbine maintenance according to any one of claims 1 to 3, characterized in that: A connecting plate is rotatably connected to the turntable, and a support rod is fixedly connected to the base. A mounting plate is threaded onto the support rod, and a locking bolt for connecting the connecting plate is provided on the mounting plate.

5. A blade braking device for wind turbine maintenance according to claim 4, characterized in that: The base has a flange integrally formed at the bottom.

6. A blade braking device for wind turbine maintenance according to claim 5, characterized in that: The flange is evenly distributed with fixing screws.

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