A large wind turbine rotating detection device

Abstract

This invention discloses a large-scale wind turbine rotation detection device, comprising a main body, a rotation detection disk mounted on the generator's rotating shaft, a non-contact sensor for monitoring the disk's movement, and a signal acquisition and processing device for receiving data from the non-contact sensor. A concentricity detection alarm mechanism is located above the rotation detection disk. This invention, through elastic tension combined with pressure change detection, can detect whether the rotation detection disk is concentric and automatically alarm to alert personnel when it is not, allowing for adjustment or replacement. This reduces damage to the generator's rotating shaft caused by misalignment. Combined with the automatic brushing and cleaning of the outer surface of the rotation detection disk during detection, it prevents impurities from affecting the detection results, improves detection stability, and achieves stable concentricity detection of the rotation detection disk, making it user-friendly.

Description

Technical Field

[0001] This invention relates to the field of rotation detection equipment technology, and in particular to a rotation detection device for large wind turbine units. Background Technology

[0002] Wind energy is a renewable and green energy source. With the increasing energy demand and strengthened environmental protection in various countries around the world, wind power generation is receiving more and more attention. The wind in nature changes every moment, directly affecting the operation of wind turbine generators. In large wind turbine generators, at least the rotational speeds of the wind turbine and the generator must be measured to achieve signal redundancy and data checking, thereby improving the reliability of the unit control. Some units also need to measure the azimuth angle of the wind turbine for independent pitch control or load control. In the current technology, sensors are used to generate high and low levels by detecting the operation of a rotating detection disk. The signal acquisition and processing device calculates and outputs the rotational speed, rotational direction, and azimuth angle based on the sensor's detection signal.

[0003] In this regard, the prior art, publication number CN103399165B, also discloses a large-scale wind turbine rotation detection device. This device includes a rotation detection disk, sensors, and a signal acquisition and processing device. The rotation detection disk is installed on the rotating shaft of the wind turbine or generator. At least three sensors generate high and low levels by detecting the operation of the rotation detection disk. The signal acquisition and processing device calculates and outputs the rotation speed, rotation direction, and azimuth angle based on the detection signals from the sensors. It has the advantages of simple structure, high sensitivity, high reliability, strong practicality, and low price, and can meet the accuracy requirements of the wind turbine control system for measuring the rotation of the wind turbine and generator.

[0004] The large wind turbine rotation detection device disclosed in the aforementioned prior art patents, while capable of detecting rotation speed and direction, still has some shortcomings. It lacks the function of stable detection of the concentricity of the rotating detection disc (meaning that if the disc is not concentric when directly mounted on the generator shaft, it will wobble during rotation, causing a constant skewed tension on the generator shaft, which can easily lead to damage). To address these issues, we propose a large wind turbine rotation detection device to solve the aforementioned problems. Summary of the Invention

[0005] Based on the technical problems existing in the background technology, the present invention proposes a large wind turbine rotation detection device.

[0006] The present invention proposes a large wind turbine rotation detection device, comprising a rotation detection device body, wherein the rotation detection device body includes a rotation detection disk mounted on the generator rotation shaft, a non-contact sensor for monitoring the movement of the rotation detection disk, and a signal acquisition and processing device for receiving data from the non-contact sensor; and a concentricity detection alarm mechanism is provided above the rotation detection disk.

[0007] The concentricity detection alarm mechanism includes a U-shaped fixed base positioned above a rotating detection disk. Below the U-shaped fixed base is a rectangular box with an open top. The bottom of the rectangular box has a tapered structure and nested with ball bearings. A display and a first controller electrically connected to the display are fixedly connected to the right side of the rectangular box. An audible and visual alarm electrically connected to the first controller is fixedly connected to the top of the display. A drive motor is fixedly connected to the bottom inner wall of the U-shaped fixed base. A second controller is fixedly connected and electrically connected to the rear side of the drive motor. A U-shaped seat is slidably fitted inside the rectangular box. A threaded drive guide assembly is fixedly connected between the bottom inner wall of the U-shaped seat and the bottom of the U-shaped fixed base. The U-shaped seat is fitted onto the threaded drive guide assembly, which drives the U-shaped seat to move up and down, thereby driving the rectangular box and... The ball moves up and down. The top of the threaded drive guide assembly is fixedly connected to the bottom of the output shaft of the drive motor. A pressure sensor electrically connected to the first controller is embedded and fixed at the bottom of the U-shaped seat. The first controller is used to transmit the extrusion force detected by the pressure sensor to the display for display. The bottom of the pressure sensor is the detection end and is fixedly connected to an elastic extrusion guide assembly. The rectangular box is slidably sleeved on the elastic extrusion guide assembly. A tactile shut-off switch electrically connected to the second controller is fixedly connected to the bottom inner wall of the rectangular box. The tactile shut-off switch is squeezed and engaged with the elastic extrusion guide assembly. The elastic extrusion guide assembly is used to squeeze and tighten the rectangular box and to squeeze and actuate the tactile shut-off switch. A brush cleaning assembly is fixedly connected to the left side of the rectangular box. The brush cleaning assembly is used to brush and clean the outside of the rotating detection disk.

[0008] Preferably, the threaded drive guide assembly includes two guide posts fixedly connected to the inner wall of the bottom of the U-shaped seat. Each guide post is slidably fitted with a guide tube fixedly connected to the bottom of the U-shaped fixed seat. The U-shaped seat is slidably fitted on the two guide tubes. A horizontal plate is fixedly connected between the two guide tubes. A screw is rotatably connected to the top of the horizontal plate. The top end of the screw is fixedly connected to the bottom end of the output shaft of the drive motor. A nut is threaded on the screw and embedded in the inner wall of the top of the U-shaped seat. The screw, nut, guide posts, guide tubes, and horizontal plate cooperate with the drive motor to drive the U-shaped seat to move up and down.

[0009] Preferably, the elastic compression guide assembly includes a compression plate fixedly connected to the bottom of the pressure sensor, a light-touch off switch located below the compression plate and compressing with the compression plate, guide rods fixedly connected to both sides of the bottom of the compression plate, a rectangular box slidably sleeved on the two guide rods, and two springs fixedly connected between the bottom of the compression plate and the bottom inner wall of the rectangular box, with the springs movably sleeved on the corresponding guide rods. The compression plate, guide rods, and springs cooperate to allow the rectangular box to be tightened downwards by the springs after the compression plate moves down to compress the springs.

[0010] Preferably, the brush cleaning assembly includes a rectangular sleeve fixedly connected to the left side of the rectangular box. The top of the rectangular sleeve is a sealing structure. A magnet is glued and fixed to the inner wall of the top of the rectangular sleeve. A rectangular iron block is attracted to the bottom of the magnet and is movably clipped into the rectangular sleeve. A brush rod is fixedly connected to the bottom of the rectangular iron block. The bottom of the brush rod is provided with multiple long bristles. A pull ring is fixedly connected to the left side of the brush rod. The bottom of the long bristles is lower than the bottom of the ball bearing. The rectangular sleeve, magnet, rectangular iron block and brush rod are designed to cooperate to facilitate the assembly and disassembly of the brush rod by magnetic snap-fit. The long bristles on the brush rod can brush and clean the outer side of the rotating detection disc when it rotates.

[0011] Preferably, two bolt mounting rings are fixedly connected to both sides of the U-shaped fixing seat.

[0012] Preferably, a storage battery is fixedly connected to the bottom inner wall of the U-shaped mounting base, and the drive motor, the first controller, the display and the audible and visual alarm are all electrically connected to the storage battery.

[0013] Preferably, a limiting hole is provided on the inner right side of the rectangular box, and a limiting block that is slidably connected to the limiting hole is fixedly connected to the right side of the U-shaped seat.

[0014] Preferably, the bottom inner wall of the U-shaped fixing seat is provided with a mounting hole with an open front side, and a rotating bearing is fixedly connected between the inner walls on both sides of the mounting hole, and the inner ring of the rotating bearing is fixedly fitted to the outer side of the screw.

[0015] Preferably, two guide grooves are formed on the bottom inner wall of the rectangular box, and the inner wall of the guide groove is slidably connected to the outer side of the corresponding guide rod.

[0016] Preferably, the front side of the rotating detection disk has multiple through holes evenly distributed in a ring, and the front side of the rotating detection disk is provided with a through circular hole.

[0017] Compared with existing technologies, the beneficial effects of this invention are:

[0018] By using a drive motor, a threaded drive guide assembly, an elastic extrusion guide assembly, a pressure sensor, a first controller, a display, a circular seat, a rectangular box, and a ball bearing, the ball bearing can be driven to move downward and elastically tightened on the top of the rotating detection disc, and the extrusion force during tightening can be displayed.

[0019] By using a rectangular box, elastic compression guide assembly, pressure sensor, first controller, display and audible and visual alarm, it can detect whether the rotating detection disc is concentric and automatically alarm to remind personnel when it is not concentric and swings.

[0020] By using a rectangular box in conjunction with a brush cleaning component, the outer side of the rotating detection disk can be automatically brushed and cleaned when it rotates. This allows for brushing and cleaning of the outer side when checking for concentricity, preventing impurities adhering to the outer side of the rotating detection disk from affecting the detection results and improving detection stability.

[0021] This invention uses an elastic tensioning mechanism to detect pressure changes, enabling it to detect whether the rotating detection disc is concentric and automatically alarming personnel when it is not, allowing for adjustment or replacement. This reduces damage to the generator's rotating shaft caused by misalignment. Combined with the automatic brushing and cleaning of the outer surface of the rotating detection disc during testing, it prevents impurities from affecting the test results, improves testing stability, and achieves stable detection of the concentricity of the rotating detection disc, making it convenient to use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a large wind turbine rotation detection device proposed in this invention;

[0023] Figure 2 for Figure 1 Enlarged cross-sectional view of part A in the diagram;

[0024] Figure 3 for Figure 2 A magnified structural diagram of part B in the diagram;

[0025] Figure 4 for Figure 2 A magnified structural diagram of part C in the diagram;

[0026] Figure 5 This is a three-dimensional structural diagram of the guide column, guide tube, and horizontal plate connector of a large wind turbine rotation detection device proposed in this invention.

[0027] In the diagram: 100. Rotary detection disc; 101. Through hole; 102. Through circular hole; 1. U-shaped fixing seat; 2. Drive motor; 3. Rectangular box; 4. Ball bearing; 5. First controller; 6. Display; 7. Audible and visual alarm; 8. U-shaped seat; 9. Conduit; 10. Guide post; 11. Horizontal plate; 12. Screw; 13. Nut; 14. Pressure sensor; 15. Extrusion plate; 16. Touch-off switch; 17. Guide rod; 18. Spring; 19. Guide groove; 20. Brush rod; 21. Rectangular sleeve; 22. Rectangular iron block; 23. Magnet; 24. Pull ring; 25. Limiting hole; 26. Limiting block; 27. Battery; 28. Bolt mounting ring. Detailed Implementation

[0028] The present invention will be further explained below with reference to specific embodiments.

[0029] Example

[0030] Reference Figure 1-5 This embodiment proposes a large wind turbine rotation detection device, including a rotation detection device body. The rotation detection device body includes a rotation detection disk 100 installed on the generator rotation shaft, a non-contact sensor for monitoring the movement of the rotation detection disk 100, and a signal acquisition and processing device for receiving data from the non-contact sensor. The front side of the rotation detection disk 100 has a plurality of through holes 101 evenly distributed in a ring shape, and a through circular hole 102 is provided on the front side of the rotation detection disk 100. The rotation measurement principle of the rotation detection device body for the generator rotation shaft is the principle of the prior art mentioned above, and this principle will not be described again. A concentricity detection alarm mechanism is provided above the rotation detection disk 100.

[0031] The concentricity detection alarm mechanism includes a U-shaped mounting base 1 positioned above the rotating detection disk 100. Two bolt mounting rings 28 are fixedly connected to both sides of the U-shaped mounting base 1 for securing it with external bolts. Below the U-shaped mounting base 1 is a rectangular box 3 with an open top. The bottom of the rectangular box 3 has a tapered structure and nested with ball bearings 4. A display 6 and a first controller 5 electrically connected to the display 6 are fixedly connected to the right side of the rectangular box 3. An audible and visual alarm 7 electrically connected to the first controller 5 is fixedly connected to the top of the display 6. A drive motor 2 and a battery 27 are fixedly connected to the inner bottom wall of the U-shaped mounting base 1. The drive motor 2, the first controller 5, and the display 6 are all part of the mechanism. The display 6 and the audible and visual alarm 7 are both electrically connected to the storage battery 27. A second controller is fixed and electrically connected to the rear side of the drive motor 2. A U-shaped seat 8 is slidably fitted inside the rectangular box 3. A limit hole 25 is opened on the right inner wall of the rectangular box 3. A limit block 26 that is slidably connected to the limit hole 25 is fixedly connected to the right side of the U-shaped seat 8, which has the effect of limiting the U-shaped seat 8 and preventing it from falling off. A threaded drive guide assembly is fixedly connected between the bottom inner wall of the U-shaped seat 8 and the bottom of the U-shaped fixed seat 1. The U-shaped seat 8 is fitted on the threaded drive guide assembly. The threaded drive guide assembly is used to drive the U-shaped seat 8 to move up and down, thereby driving the rectangular box 3 and the ball 4 to move up and down. The top end of the threaded drive guide assembly is fixedly connected to the bottom end of the output shaft of the drive motor 2. The moving guide assembly includes two guide posts 10 fixedly connected to the inner wall of the bottom of the U-shaped seat 8. Each guide post 10 has a guide tube 9 slidably fitted onto it, which is fixedly connected to the bottom of the U-shaped fixed seat 1. The U-shaped seat 8 is slidably fitted onto the two guide tubes 9. Two guide holes are provided on the inner wall of the top of the U-shaped seat 8, which are slidably connected to the outer sides of the corresponding guide tubes 9. The U-shaped seat 8 is slidably fitted onto the two guide tubes 9 through the two guide holes, thus guiding the U-shaped seat 8 up and down. A horizontal plate 11 is fixedly connected between the two guide tubes 9. A screw 12 is rotatably connected to the top of the horizontal plate 11. A first bearing is fixedly connected to the top of the horizontal plate 11. The inner side of the inner ring of the first bearing is fixedly connected to the outer side of the screw 12. The screw 12 is rotatably connected to the horizontal plate through the first bearing. The top of 11 serves to support the rotation of screw 12. The top of screw 12 is fixedly connected to the bottom of the output shaft of drive motor 2. The bottom inner wall of U-shaped fixing seat 1 has an installation hole with an open front side. A rotating bearing is fixedly connected between the inner walls on both sides of the installation hole. The inner ring of the rotating bearing is fixedly fitted to the outer side of screw 12. A nut 13 is threaded on screw 12 and embedded and fixed on the top inner wall of the spiral seat 8. The top inner wall of the spiral seat 8 has an embedding hole that is welded and fixed to the outer side of nut 13. Nut 13 is embedded and fixed on the top inner wall of spiral seat 8 through the embedding hole. The screw 12, nut 13, guide post 10, guide tube 9, and cross plate 11 cooperate with drive motor 2 to drive spiral seat 8 to move up and down.

[0032] A pressure sensor 14, electrically connected to a first controller 5, is embedded and fixed at the bottom of a rectangular base 8. The bottom of the rectangular base 8 has an mounting groove for bonding the top of the pressure sensor 14. The pressure sensor 14 is fixedly mounted to the bottom of the rectangular base 8 through the mounting groove. The first controller 5 transmits the pressure detected by the pressure sensor 14 to a display 6 for display. The bottom of the pressure sensor 14 is the detection end and is fixedly connected to an elastic compression guide assembly. A rectangular box 3 is slidably fitted onto the elastic compression guide assembly. A tactile shut-off switch 16, electrically connected to a second controller, is fixedly connected to the inner wall of the bottom of the rectangular box 3. The tactile shut-off switch 16 engages with the elastic compression guide assembly, which is used to compress and tighten the rectangular box 3 and to actuate the tactile shut-off switch 16. The elastic compression guide assembly includes components fixedly connected to... The pressure sensor 14 has a pressure plate 15 at its bottom. The light-touch off switch 16 is located below the pressure plate 15 and is pressed and engaged with the pressure plate 15. Guide rods 17 are fixedly connected to both sides of the bottom of the pressure plate 15. The rectangular box 3 is slidably sleeved on the two guide rods 17. Two guide grooves 19 are opened on the bottom inner wall of the rectangular box 3, and the inner wall of the guide groove 19 is slidably connected to the outer side of the corresponding guide rod 17, so as to guide the guide rod 17 to slide up and down. Two springs 18 are fixedly connected between the bottom of the pressure plate 15 and the bottom inner wall of the rectangular box 3, and the springs 18 are movably sleeved on the corresponding guide rods 17. The pressure plate 15, guide rods 17 and springs 18 are configured to cooperate so that after the pressure plate 15 moves down to compress the springs 18, the springs 18 can be used to tighten the rectangular box 3 downward, and the pressure plate 15 can be used to press and activate the light-touch off switch 16.

[0033] A brush cleaning assembly is fixedly connected to the left side of the rectangular box 3. The brush cleaning assembly is used to brush and clean the outer side of the rotating detection disk 100. The brush cleaning assembly includes a rectangular sleeve 21 fixedly connected to the left side of the rectangular box 3. The top of the rectangular sleeve 21 is designed as a sealing structure. A magnet 23 is glued and fixed to the inner wall of the top of the rectangular sleeve 21. A rectangular iron block 22 is attracted to the bottom of the magnet 23 and is movably locked inside the rectangular sleeve 21. A brush rod 20 is fixedly connected to the bottom of the rectangular iron block 22. The bottom of the brush rod 20 is provided with multiple long bristles. A pull ring 24 is fixedly connected to the left side of the brush rod 20. The bottom of the long bristles is lower than the bottom of the ball bearing 4. The rectangular sleeve 21, magnet 23, rectangular iron block 22 and brush rod are arranged in a specific manner. The brush rod 20 can be easily installed and removed using a magnetic snap-fit ​​mechanism. The long bristles on the brush rod 20 can clean the outer side of the rotating detection disk 100 as it rotates. In this embodiment, by using elastic tension to detect changes in detection pressure, it can detect whether the rotating detection disk 100 is concentric and automatically alarm to remind personnel if it is not concentric, so that personnel can adjust or replace it. This reduces the damage to the generator rotating shaft caused by misalignment. The automatic brushing and cleaning of the outer side of the rotating detection disk 100 during detection can prevent impurities adhering to the outer side from affecting the detection results, improve detection stability, and achieve the purpose of stable detection of the concentricity of the rotating detection disk 100, which is beneficial to use.

[0034] In this embodiment, after the rotating detection disk 100 is installed on the generator rotating shaft, when it is necessary to detect whether the rotating detection disk 100 is concentric, the drive motor 2 is first started in the forward direction to drive the screw 12 to rotate. The rotation of the screw 12 can drive the nut 13 to move downward. The nut 13 drives the ring seat 8 to slide downward on the two guide tubes 9. The ring seat 8 drives the two guide posts 10 to slide downward in the corresponding guide tubes 9. At the same time, the ring seat 8 drives the pressure sensor 14 to move downward. The pressure sensor 14 drives the rectangular box 3 to move downward through the extrusion plate 15 and the two springs 18 in sequence. The rectangular box 3 drives the ball 4 to move downward. When the ball 4 moves down to contact the top of the rotating detection disk 100, it will be blocked and restricted, so that the rectangular box 3 does not... As the extrusion plate 15 continues to move downward, it drives the two guide rods 17 to slide downward in their respective guide grooves 19, compressing the two springs 18. When the extrusion plate 15 moves downward and comes into contact with the light-touch off switch 16, the light-touch off switch 16 transmits a closing signal to the second controller. The second controller controls the drive motor 2 to turn off. At this time, the compressed spring 18 elastically tightens the rectangular box 3 and the ball 4 downward. Since the forces are mutual, the compressed spring 18 also exerts an upward tension on the extrusion plate 15. The pressure sensor 14 transmits the detected pressure to the first controller 5. The first controller 5 controls the display 6 to display the pressure value. At this time, the pressure value is used as the initial detected pressure value.

[0035] When the rectangular box 3 moves downward, it also drives the brush rod 20 downward through the rectangular sleeve 21, magnet 23, and rectangular iron block 22. The brush rod 20 drives the long bristles downward to contact the top of the rotating detection disk 100. At the start of the detection, the rotating detection disk 100 is driven to rotate by the generator shaft. When the rotating detection disk 100 rotates, it will rub against the long bristles, which will have the effect of brushing and cleaning the outside of the rotating detection disk 100. The friction of the rotating detection disk 100 drives the ball 4 to rotate. When the rotating detection disk 100 is concentric and does not wobble, the pressure value detected by the pressure sensor 14 will not change. However, when the rotating detection disk 100 is not concentric and wobbles, it will intermittently squeeze the ball 4 upward. Under the squeezing force, the ball 4 drives the rectangular box 3 to slide upward on the return seat 8. The spring 18 is compressed upwards, changing its degree of compression. This alters the upward tension on the extrusion plate 15, increasing the pressure detected by the pressure sensor 14 and transmitting it to the first controller 5. The pressure value displayed on the monitor 6 increases accordingly. When the pressure value increases, the first controller 5 activates the audible and visual alarm 7 to alert personnel. By observing whether an alarm is triggered and whether the pressure value displayed on the monitor 6 changes, personnel can accurately determine whether the rotating detection disc 100 is concentric. Furthermore, the brushing and cleaning of the outer side of the rotating detection disc 100 during testing prevents impurities from adhering to the outer side of the disc from affecting the test results, improving testing stability and achieving stable concentricity testing of the rotating detection disc 100.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A large wind turbine rotation detection device, comprising a rotation detection device body, the rotation detection device body including a rotation detection disk (100) mounted on the generator rotation shaft, a non-contact sensor for monitoring the movement of the rotation detection disk (100), and a signal acquisition and processing device for receiving data from the non-contact sensor, characterized in that, A concentricity detection alarm mechanism is provided above the rotating detection disk (100); The concentricity detection alarm mechanism includes a U-shaped fixed base (1) set above the rotating detection disk (100), a rectangular box (3) with an open top is provided below the U-shaped fixed base (1), the bottom of the rectangular box (3) is a conical structure and nested with ball bearings (4), a display (6) and a first controller (5) electrically connected to the display (6) are fixedly connected to the right side of the rectangular box (3), an audible and visual alarm (7) electrically connected to the first controller (5) is fixedly connected to the top of the display (6), a drive motor (2) is fixedly connected to the bottom inner wall of the U-shaped fixed base (1), a second controller is fixedly connected to the rear side of the drive motor (2), and a spiral seat (8) is slidably fitted inside the rectangular box (3), the bottom inner wall of the spiral seat (8) is connected to the first controller (5). A threaded drive guide assembly is fixedly connected between the bottom of the U-shaped fixed seat (1). The U-shaped seat (8) is fitted on the threaded drive guide assembly. The top of the threaded drive guide assembly is fixedly connected to the bottom of the output shaft of the drive motor (2). A pressure sensor (14) electrically connected to the first controller (5) is embedded and fixed at the bottom of the U-shaped seat (8). The bottom of the pressure sensor (14) is the detection end and is fixedly connected to an elastic extrusion guide assembly. The rectangular box (3) is slidably fitted on the elastic extrusion guide assembly. A touch-off switch (16) electrically connected to the second controller is fixedly connected to the bottom inner wall of the rectangular box (3). The touch-off switch (16) is squeezed and engaged with the elastic extrusion guide assembly. A brush cleaning assembly is fixedly connected to the left side of the rectangular box (3). The elastic compression guide assembly includes a compression plate (15) fixedly connected to the bottom of the pressure sensor (14), a light-touch off switch (16) located below the compression plate (15) and compressionally engaged with the compression plate (15), guide rods (17) fixedly connected to both sides of the bottom of the compression plate (15), a rectangular box (3) slidably sleeved on the two guide rods (17), and two springs (18) fixedly connected between the bottom of the compression plate (15) and the bottom inner wall of the rectangular box (3), and the springs (18) movably sleeved on the corresponding guide rods (17).

2. A rotating detection device for a large wind turbine generator according to claim 1, wherein, The threaded drive guide assembly includes two guide posts (10) fixedly connected to the inner wall of the bottom of the U-shaped seat (8). Each guide post (10) is slidably fitted with a conduit (9) fixedly connected to the bottom of the U-shaped fixed seat (1). The U-shaped seat (8) is slidably fitted on the two conduits (9). A horizontal plate (11) is fixedly connected between the two conduits (9). A screw (12) is rotatably connected to the top of the horizontal plate (11). The top of the screw (12) is fixedly connected to the bottom of the output shaft of the drive motor (2). A nut (13) is threadedly fitted on the screw (12) and fixedly embedded in the inner wall of the top of the U-shaped seat (8).

3. A rotating detection device for a large wind turbine generator according to claim 1, wherein, The brush cleaning assembly includes a rectangular sleeve (21) fixedly connected to the left side of the rectangular box (3). The top of the rectangular sleeve (21) is a sealing structure. A magnet (23) is glued and fixed to the inner wall of the top of the rectangular sleeve (21). A rectangular iron block (22) is movable and installed in the rectangular sleeve (21) at the bottom of the magnet (23). A brush rod (20) is fixedly connected to the bottom of the rectangular iron block (22). The bottom of the brush rod (20) is provided with multiple long bristles. A pull ring (24) is fixedly connected to the left side of the brush rod (20). The bottom of the long bristles is lower than the bottom of the ball (4).

4. A rotating detection device for a large wind turbine generator according to claim 1, wherein, The U-shaped fixing seat (1) has two bolt mounting rings (28) fixedly connected to both sides.

5. A rotating detection device for a large wind turbine generator according to claim 1, wherein, A battery (27) is fixedly connected to the bottom inner wall of the U-shaped mounting base (1). The drive motor (2), the first controller (5), the display (6) and the audible and visual alarm (7) are all electrically connected to the battery (27).

6. A rotating detection device for a large wind turbine generator according to claim 1, wherein, A limiting hole (25) is provided on the inner wall of the right side of the rectangular box (3), and a limiting block (26) that is slidably connected to the limiting hole (25) is fixedly connected to the right side of the U-shaped seat (8).

7. A rotating detection device for a large wind turbine generator according to claim 2, wherein, The U-shaped fixing seat (1) has an installation hole with an open front side on the bottom inner wall. A rotating bearing is fixedly connected between the inner walls on both sides of the installation hole. The inner ring of the rotating bearing is fixedly fitted to the outer side of the screw (12).

8. A rotating detection device for a large wind turbine generator according to claim 1, wherein, Two guide grooves (19) are provided on the bottom inner wall of the rectangular box (3), and the inner wall of the guide groove (19) is slidably connected to the outer side of the corresponding guide rod (17).

9. A large wind turbine rotation detection device according to claim 1, characterized in that, The front side of the rotating detection disk (100) has multiple through holes (101) evenly distributed in a ring, and the front side of the rotating detection disk (100) has a through circular hole (102).

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