Device for detecting connecting bolts on yaw brakes and wind turbine

Abstract

The application discloses a device for detecting connecting bolts on yaw brakes and a wind turbine, and relates to the technical field of wind power equipment maintenance. The device comprises a device body, a screwing mechanism, a push-pull assembly and a torque detection piece. The device body is arranged below the inside of a cabin. The screwing mechanism is arranged on the device body and has a screwing head at the lower end. The push-pull assembly is arranged on the device body and is in transmission connection with the screwing mechanism. The torque detection piece is arranged on the device body and is connected with the screwing mechanism. The push-pull assembly drives at least part of the screwing mechanism to move downward by a preset displacement, so that the screwing head is in butt joint with the connecting bolts. The screwing mechanism applies a torsion to the connecting bolts through the screwing head. The torque detection piece detects the torque applied to the connecting bolts through the screwing head, so as to determine whether the connecting bolts are loose or broken. According to the device, the tightness of the connecting bolts can be detected artificially, and the cost of later maintenance is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of wind power equipment maintenance technology, specifically a device for detecting connecting bolts on yaw brakes and a wind turbine generator set. Background Technology

[0002] The yaw system of a wind turbine, also known as a wind-aligning device, is part of the nacelle of a wind turbine. Its main purpose is to quickly and smoothly align with the wind direction when the wind speed vector changes, so that the wind turbine can obtain the maximum wind energy.

[0003] Once the wind turbine blades are aligned with the wind direction, a brake is needed to secure the nacelle and the tower. Specifically, the brake is fixed to the nacelle by connecting bolts and works with the brake disc on the tower to apply the brakes and fix the position of the wind turbine blades on the nacelle.

[0004] However, after prolonged use, the connecting bolts between the brake and the engine compartment often break due to fatigue, which can seriously affect yaw. When the brake cylinder bursts, hydraulic oil spills out, causing the inverter, climber, platform, tower wall, engine compartment, etc. to be covered with oil stains, which brings great inconvenience to the workers and safety hazards such as slipping, falling from heights, and fire, and increases the cost of later maintenance. Summary of the Invention

[0005] The purpose of this invention is to provide a device and a wind turbine for detecting connecting bolts on a yaw brake, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides a device for detecting connecting bolts on a yaw brake, wherein the yaw brake is connected to the bottom of the nacelle by connecting bolts, the nacelle is rotatably mounted on the upper end of the tower, and brake pads at the upper end of the tower cooperate with the yaw brake for braking. The device for detecting connecting bolts on the yaw brake includes:

[0008] The main body of the device is designed to be installed on the lower inner side of the cabin.

[0009] A screwing mechanism is mounted on the device body. The lower end of the screwing mechanism has a screwing head, which is used to match the connecting bolt.

[0010] The push-pull assembly is mounted on the device body and is connected to the turning mechanism via a transmission.

[0011] A torque detection element is mounted on the device body and connected to the screwing mechanism;

[0012] The push-pull assembly is configured to drive at least part of the screwing mechanism to move down a preset displacement so that the screwing head engages with the connecting bolt; the screwing mechanism is configured to apply torque to the connecting bolt through the screwing head; the torque detection element is configured to detect the torque applied to the connecting bolt through the screwing head to determine whether the connecting bolt is loose or broken.

[0013] As a further embodiment of the present invention: the screwing mechanism includes a screwing assembly, a transmission shaft and a first drive assembly, the screwing assembly is vertically movable on the device body, and the screwing head is located at the lower end of the screwing assembly;

[0014] The drive shaft is vertically mounted on the device body and is connected to the upper end of the screwing assembly. The first drive assembly is mounted on the device body and is connected to the upper end of the drive shaft.

[0015] The push-pull assembly is connected to the turning assembly to drive the turning assembly to move up and down, and the torque detection element is connected to the drive shaft.

[0016] As a further embodiment of the present invention: the screwing assembly includes a first connecting rod, a second connecting rod and an elastic element, wherein the first connecting rod is vertically movable on the device body and its upper end is connected to the lower end of the transmission shaft for transmission.

[0017] The push-pull assembly is connected to the first connecting rod to drive the first connecting rod to move up and down. The upper end of the second connecting rod is inserted into the lower end of the first connecting rod and connected by an elastic element to elastically press the second connecting rod downward. The screw head is connected to the lower end of the second connecting rod.

[0018] As a further embodiment of the present invention: the push-pull assembly includes a mounting plate and a telescopic component, the mounting plate being sleeved on the upper end of the first connecting rod, and the first connecting rod rotating relative to the mounting plate about a vertical axis;

[0019] The telescopic component is vertically mounted on the device body and connected to the mounting plate, so as to drive the first connecting rod to move up and down through the mounting plate.

[0020] As a further embodiment of the present invention: the upper end of the first connecting rod has a spline hole, the lower end of the transmission shaft has a spline shaft that matches the spline hole, and the spline shaft is inserted into the spline hole.

[0021] As a further embodiment of the present invention: the second connecting rod is a flexible rod, used for adaptive lateral offset adjustment of the screw head to smoothly mate with the connecting bolt.

[0022] As a further embodiment of the present invention, it also includes: a mounting base and a second drive assembly, wherein the screwing mechanism, the push-pull assembly and the torque detection element are connected to the mounting base;

[0023] The second drive assembly is connected to the mounting base and is used to drive the mounting base to move radially along the tower so that the screw head can mate with the connecting bolts at different radial positions.

[0024] As a further embodiment of the present invention, it also includes: a guide rail assembly and a third drive assembly, wherein the guide rail assembly is coaxially connected to the lower inner side of the cabin, and the device body is slidably connected to the bottom of the guide rail assembly;

[0025] The third drive assembly is connected to the main body of the device to drive the main body to move circumferentially along the tower so that the screwing head can align with the connecting bolts at different positions circumferentially.

[0026] As a further embodiment of the present invention, it also includes: a position detection element and a controller, wherein the position detection element is used to detect the orientation of the screw head relative to the connecting bolt;

[0027] The position detection component, the turning mechanism, the push-pull assembly, the torque detection component, the second drive assembly, and the third drive assembly are all electrically connected to the controller.

[0028] In a second aspect, the present invention provides a wind turbine generator, including any of the devices provided in the first aspect for detecting connecting bolts on a yaw brake.

[0029] According to the present invention, a device for detecting connecting bolts on a yaw brake and a wind turbine generator are provided, which have at least the following technical effects. The device for detecting connecting bolts on a yaw brake includes a device body, a screwing mechanism, a push-pull assembly, and a torque detection element. The device body is provided as an installation base by being placed on the lower inner side of the nacelle. The screwing mechanism is placed on the device body, and a screwing head is provided at the lower end of the screwing mechanism. The screwing head is used to match the connecting bolt. The push-pull assembly is placed on the device body and is connected to the screwing mechanism. The torque detection element is placed on the device body and connected to the screwing mechanism. The push-pull assembly drives at least part of the screwing mechanism to move downward by a preset displacement, so that the screwing head aligns with the connecting bolt. The screwing mechanism then applies torque to the connecting bolt through the screwing head. Finally, the torque detection element detects the torque applied to the connecting bolt through the screwing head. If the torque is greater than or equal to the preset torque, the connecting bolt is determined to be normal. If the torque is less than the preset torque, the connecting bolt is determined to be loose or broken. Therefore, by using this device to tighten the connecting bolts on the yaw brake to determine whether they are loose or broken, the tightness of the connecting bolts can be continuously checked by manual labor, thereby eliminating potential safety hazards to a certain extent, significantly reducing the cost of subsequent maintenance, and ensuring the normal operation of the wind turbine. Attached Figure Description

[0030] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0031] Figure 1 This is a top view of a yaw brake in the prior art;

[0032] Figure 2 A schematic diagram of the device for detecting connecting bolts on a yaw brake and the tower and nacelle mounting system provided in an embodiment of the present invention;

[0033] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0034] Figure 4 for Figure 3 A schematic diagram of another state;

[0035] Figure 5 for Figure 3 A schematic diagram of a state under the current conditions;

[0036] Figure 6 for Figure 2 A partial view along direction B in the middle.

[0037] Figure label:

[0038] 10. Yaw brake; 11. Connecting bolts; 20. Nacelle; 30. Tower; 31. Brake pads;

[0039] 100. Device body;

[0040] 200. Twisting mechanism; 201. Twisting head; 210. Twisting assembly; 211. First connecting rod; 212. First connecting rod; 213. Elastic element; 220. Drive shaft; 230. First drive assembly;

[0041] 300. Push-pull assembly; 310. Mounting plate; 320. Telescopic component;

[0042] 400. Torque detection component;

[0043] 500. Mounting bracket;

[0044] 600. Second drive component;

[0045] 700. Guide rail assembly;

[0046] 800, Third Drive Component. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0049] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0050] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0053] like Figure 1 As shown, existing yaw brakes 10 generally have multiple connecting bolts 11, such as two rows of connecting bolts 11 arranged in a rectangular array, totaling 12 bolts. The yaw brake 10 is connected to the bottom of the nacelle 20 through these connecting bolts 11, and the upper end of the connecting bolts 11 can be locked with nuts. The lower end of the nacelle 20 is rotatably mounted on the upper end of the tower 30 through a slewing bearing. A brake pad 31 is coaxially mounted on the upper end of the tower 30. The yaw brake 10 cooperates with the brake pad 31 to brake or release, and multiple yaw brakes 10 can be evenly distributed around the axis of the tower 30.

[0054] Firstly, please refer to Figures 2 to 6As shown, an embodiment of the present invention provides a device for detecting connecting bolts on a yaw brake, comprising:

[0055] The device body 100 is used to be installed on the lower inner side of the cabin 20.

[0056] A screwing mechanism 200 is mounted on the device body 100. The lower end of the screwing mechanism 200 has a screwing head 201, which is used to match the connecting bolt 11.

[0057] The push-pull assembly 300 is mounted on the device body 100 and is connected to the turning mechanism 200 via a transmission.

[0058] The torque detection element 400 is mounted on the device body 100 and connected to the screwing mechanism 200.

[0059] The push-pull assembly 300 is configured to drive at least a portion of the tightening mechanism 200 downward by a predetermined displacement, causing the tightening head 201 to engage with the connecting bolt 11. The tightening mechanism 200 is configured to apply torque to the connecting bolt 11 via the tightening head 201. The torque detection element 400 is configured to detect the torque applied to the connecting bolt 11 via the tightening head 201 to determine whether the connecting bolt 11 is loose or broken.

[0060] In this embodiment, the device body 100 can be a frame-like or block-like structure, and is used to install at least the screwing mechanism 200, the push-pull assembly 300, and the torque detection component 400, which can be fixedly or movably installed on the inner wall below the cabin 20.

[0061] In this embodiment, the screwing mechanism 200 is used to provide torque to the connecting bolt 11. It is mounted on the device body 100 and has a screwing head 201 at its lower end. The screwing head 201 matches the nut at the upper end of the connecting bolt 11 and can rotate around the vertical axis.

[0062] In this embodiment, the push-pull assembly 300 is mainly used to drive the rotating head 201 to move up and down, so that the rotating head 201 can be connected to or disconnected from the connecting bolt 11. It is set on the device body 100 and is at least connected to a part of the rotating mechanism 200 to drive the rotating head 201 to move up and down.

[0063] In this embodiment, the torque detection component 400 can be a torque meter, torque sensor, etc. It is installed on the device body 100 and is connected to at least part of the screwing mechanism 200 to detect the torque applied to the connecting bolt 11.

[0064] Specifically, the device is positioned above the connecting bolt 11, with the screwing head 201 aligned with the connecting bolt 11. The push-pull assembly 300 drives at least part of the screwing mechanism 200 to move downward by a preset displacement, causing the screwing head 201 to engage with the connecting bolt 11. Then, the screwing mechanism 200 applies torque to the connecting bolt 11 through the screwing head 201. Finally, the torque detection element 400 detects the torque applied to the connecting bolt 11 through the screwing head 201. If the preset torque value is reached, it indicates that the connecting bolt 11 is in a normal state. If the preset torque value is not reached, it indicates that the connecting bolt 11 is loose or broken, reminding personnel to tighten or replace it in time.

[0065] It should be noted that the torque applied by the tightening mechanism 200 to the connecting bolts 11 is less than or much less than the preload of each connecting bolt 11. The tightening mechanism 200 slowly applies rotational force to the connecting bolts 11. If the connecting bolts 11 are not loose or broken, neither the tightening head 201 nor the connecting bolts 11 will rotate. If the connecting bolts 11 are loose or broken, the tightening head 201 will drive the connecting bolts 11 to rotate less than one or a few turns before stopping.

[0066] It should be noted that the specific value of the preset displacement can be determined according to the actual installation space height, and is not specifically limited in this embodiment. The specific type and specifications of the screw head 201 can be determined according to the actual requirements of the connecting bolts 11, and are not specifically limited in this embodiment either.

[0067] Therefore, the application of the device for detecting the connecting bolts on the yaw brake provided in this embodiment of the invention allows the device to determine whether the connecting bolts 11 on the yaw brake 10 are loose or broken by turning them. This replaces some of the manual continuous detection of the tightness of the connecting bolts 11, eliminates safety hazards to a certain extent, significantly reduces the cost of later maintenance, and ensures the normal operation of the wind turbine.

[0068] In some embodiments, the screwing mechanism 200 includes a screwing assembly 210, a drive shaft 220 and a first drive assembly 230. The screwing assembly 210 is vertically movable on the device body 100, and the screwing head 201 is located at the lower end of the screwing assembly 210.

[0069] The drive shaft 220 is vertically mounted on the device body 100 and is connected to the upper end of the screwing assembly 210. The first drive assembly 230 is mounted on the device body 100 and is connected to the upper end of the drive shaft 220.

[0070] The push-pull assembly 300 is connected to the turning assembly 210 to drive the turning assembly 210 to move up and down, and the torque detection element 400 is connected to the drive shaft 220.

[0071] Specifically, such as Figure 2 , Figure 3As shown, the screwing assembly 210 can be rod-shaped and vertically movable on the device body 100. That is, the screwing assembly 210 can move vertically and rotate around the vertical axis. The screwing head 201 is located at the lower end of the screwing assembly 210.

[0072] The drive shaft 220 is mounted on the device body 100 via bearing assemblies and rotates around a vertical axis. The lower end of the drive shaft 220 is connected to the screwing assembly 210 via a spline drive, flexible shaft drive, or similar structure, while the upper end of the drive shaft 220 is connected to the first drive assembly 230. Furthermore, a torque detection element 400 is coaxially connected to the drive shaft 220 to indirectly detect the torque applied to the connecting bolt 11. The specific type of the torque detection element 400 can be determined according to actual needs and is not specifically limited in this embodiment.

[0073] For example, the first drive assembly 230 may include a torque motor and a gear set. The torque motor is mounted on the device body 100 and is connected to the upper end of the drive shaft 220 via the gear set (such as a bevel gear set), thereby providing a stable rotational force to the screwing head 201. Of course, the first drive assembly 230 may also be replaced by other types of drive assemblies, and this embodiment does not impose too many restrictions on this.

[0074] Furthermore, in this embodiment, the screwing assembly 210 includes a first connecting rod 211, a second connecting rod 212, and an elastic element 213. The first connecting rod 211 is vertically movable on the device body 100, and its upper end is connected to the lower end of the transmission shaft 220.

[0075] The push-pull assembly 300 is connected to the first connecting rod 211 to drive the first connecting rod 211 to move up and down. The upper end of the second connecting rod 212 is inserted into the lower end of the first connecting rod 211 and connected by the elastic member 213 to elastically press the second connecting rod 212 downward. The screw head 201 is connected to the lower end of the second connecting rod 212.

[0076] Specifically, such as Figure 3 As shown, the upper end of the first connecting rod 211 can be vertically moved on the device body 100 via a sliding sleeve, and the upper end is connected to the lower end of the transmission shaft 220. For example, the upper end of the first connecting rod 211 has a spline hole, and the lower end of the transmission shaft 220 has a spline shaft that matches the spline hole, with the spline shaft inserted into the spline hole. This ensures that while the transmission shaft 220 drives the first connecting rod 211 to rotate, the first connecting rod 211 can also move up and down.

[0077] The elastic element 213 can be a spring. For example, the lower end of the first connecting rod 211 has a socket, and the spring is installed in the socket. The upper end of the second connecting rod 212 has a plug that matches the socket. The plug is inserted into the socket, and the plug is pressed against the bottom wall of the socket by the spring. In this way, when the screw head 201 and the nut on the connecting bolt 11 are misaligned in the circumferential direction, and the push-pull assembly 300 drives the screw head 201 to move down, after it comes into contact with the connecting bolt 11, the spring is compressed, preventing the screw head 201 from forcibly squeezing the connecting bolt 11 and causing damage. After the first drive assembly 230 drives the screw head 201 to rotate and align it with the connecting bolt 11 again, the screw head 201 moves down again to complete the docking with the connecting bolt 11.

[0078] It should be noted that the plug can only move vertically within the socket and cannot rotate relative to it. For example, the cross-sections of the plug and the socket can be rectangular, irregular, or other shapes. Furthermore, a limiting structure can be provided between the plug and the socket. For example, a flange can be provided at the upper end of the plug, and an inner step can be provided at the lower end of the inner wall of the socket. The flange cannot pass through the inner step, thereby preventing the first connecting rod 211 from separating from the second connecting rod 212.

[0079] Furthermore, in this embodiment, the push-pull assembly 300 includes a mounting plate 310 and a telescopic member 320. The mounting plate 310 is sleeved on the upper end of the first connecting rod 211, and the first connecting rod 211 rotates relative to the mounting plate 310 about a vertical axis.

[0080] The telescopic component 320 is vertically mounted on the device body 100 and connected to the mounting plate 310 so as to drive the first connecting rod 211 to move up and down through the mounting plate 310.

[0081] Specifically, such as Figure 2 , Figure 3 As shown, the mounting plate 310 can be sleeved on the upper end of the first connecting rod 211 through a rotating structure such as bearings, so that the first connecting rod 211 can rotate around the vertical axis. The telescopic component 320 can be a double-rod cylinder, electric push rod, etc., which is vertically set on the device body 100, that is, the telescopic direction is vertical. The telescopic end is fixedly connected to the mounting plate 310, so that the first connecting rod 211 can be driven to move up and down through the mounting plate 310, thereby driving the screwing head 201 to move up and down.

[0082] Furthermore, in this embodiment, the second connecting rod 212 is a flexible rod used for adaptive lateral offset adjustment of the screw head 201 to smoothly mate with the connecting bolt 11.

[0083] That is, such as Figure 3As shown, the lower end of the second connecting rod 212 swings laterally at a certain angle. In this way, when the screw head 201 and the nut on the connecting bolt 11 are misaligned in the vertical direction, during the process of the push-pull assembly 300 driving the screw head 201 to move downward, after it comes into contact with the connecting bolt 11, the screw head 201 can adaptively offset laterally to smoothly connect with the connecting bolt 11, which is stable and reliable.

[0084] In some embodiments, the device further includes: a mounting base 500 and a second drive assembly 600, wherein a screwing mechanism 200, a push-pull assembly 300 and a torque sensing element 400 are connected to the mounting base 500.

[0085] The second drive assembly 600 is connected to the mounting base 500 and is used to drive the mounting base 500 to move radially along the tower 30 so that the screw head 201 mates with the connecting bolts 11 at different radial positions.

[0086] Specifically, such as Figures 3 to 5 As shown, the mounting base 500 can be a frame, housing, or other structure. The screwing mechanism 200, push-pull assembly 300, and torque sensing element 400 are connected to the mounting base 500. The second drive assembly 600 may include a telescopic rod and multiple guide rods. Each guide rod extends laterally and can be spaced apart in both vertical and horizontal directions. The mounting base 500 is connected to the device body 100 via the guide rods, and the mounting base 500 can move relative to the device body 100, such as along... Figure 3 Move along the X-axis.

[0087] In addition, the telescopic rod can be a cylinder, an electric push rod, etc., which is set on the device body 100 and the telescopic end is connected to the mounting base 500, thereby driving the mounting base 500 to move a second preset displacement radially along the tower 30, so that the screwing head 201 mates with the connecting bolts 11 at different radial positions, thereby meeting the detection requirements of the connecting bolts 11 at different positions.

[0088] Of course, the second drive component 600 can also be replaced by other types of drive components, as long as they can ensure that the screw head 201 moves stably along the radial direction of the tower 30. In this embodiment, no restrictions are placed on this.

[0089] Furthermore, in this embodiment, it also includes: a guide rail assembly 700 and a third drive assembly 800, the guide rail assembly 700 being coaxially connected to the lower inner side of the cabin 20, and the device body 100 being slidably connected to the bottom of the guide rail assembly 700.

[0090] The third drive assembly 800 is connected to the device body 100 to drive the device body 100 to move a third preset displacement along the circumference of the tower 30, so that the screwing head 201 can mate with the connecting bolts 11 at different positions in the circumference.

[0091] Specifically, such as Figure 2 , Figure 6 As shown, the guide rail assembly 700 may include a support ring and multiple guide rails. The support ring is coaxially connected to the inner wall below the nacelle 20, and each guide rail is also annular and coaxially fixed to the bottom of the support ring. The upper end of the device body 100 can be connected to each guide rail via sliders, pulley blocks, etc., so that the device body 100 can move around the circumference of the tower 30.

[0092] The third drive assembly 800 may include a stepper motor, a gear, and a gear ring. The gear ring is coaxially fixedly connected to the bottom of the support ring, and the stepper motor is fixedly connected to the upper end of the device body 100. Its output end is connected to the gear ring via a gear transmission. In this way, the connecting bolts 11 on the yaw brake 10 at different positions around the tower 30 can be inspected, thereby meeting the inspection requirements of the connecting bolts 11 at different positions.

[0093] Of course, the guide rail assembly 700 and the third drive assembly 800 can also be replaced by other types of drive structures, as long as they can ensure that the screwing head 201 moves stably along the circumference of the tower 30. In this embodiment, no restrictions are imposed.

[0094] Furthermore, this embodiment also includes a position detection element and a controller, wherein the position detection element is used to detect the orientation of the screw head 201 relative to the connecting bolt 11.

[0095] The position detection component, the turning mechanism 200, the push-pull assembly 300, the torque detection component 400, the second drive assembly 600, and the third drive assembly 800 are electrically connected to the controller.

[0096] Specifically, not shown in the figure, the position detection component can be a position sensor, limit switch, etc., and can be installed between the device body 100 and the inner wall of the cabin 20 to detect the orientation of the screwing head 201 relative to the connecting bolt 11, facilitating docking. In addition, the controller can control the operation of the screwing mechanism 200, the push-pull assembly 300, the torque detection component 400, the second drive assembly 600, and the third drive assembly 800 respectively to inspect the connecting bolts 11 on each yaw brake 10 one by one, facilitating automated inspection.

[0097] It should be noted that the specific type, quantity, and installation location of the position detection device and controller can be determined according to actual needs, and no specific limitations are made in this embodiment. In addition, in order to avoid tangled electrical wiring and pipelines during the inspection process, multiple devices can be installed, with each device responsible for detecting the connecting bolts 11 on the yaw brake 10 within a certain arc range.

[0098] Secondly, embodiments of the present invention also provide a wind turbine generator, including the device for detecting connecting bolts on the yaw brake as described in any of the above embodiments.

[0099] The wind turbine includes a tower 30, a nacelle 20 and multiple yaw brakes 10. The yaw brakes 10 are connected to the bottom of the nacelle 20 by connecting bolts 11. The nacelle 20 is rotatably mounted on the upper end of the tower 30. The brake pads 31 at the upper end of the tower 30 cooperate with the yaw brakes 10 for braking. The device body 100 is located on the lower inner side of the nacelle 20.

[0100] Therefore, the wind turbine provided in this embodiment of the invention determines whether the yaw brake 10 is loose or broken by turning the connecting bolt 11 on the yaw brake 10, which replaces part of the manual continuous inspection of the tightness of the connecting bolt 11, eliminates safety hazards to a certain extent, greatly reduces the cost of later maintenance, and ensures the normal operation of the wind turbine.

[0101] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A device for detecting connecting bolts on a yaw brake, characterized in that, include: The device body (100) is used to be installed on the lower inner side of the cabin (20); A screwing mechanism (200) is provided on the device body (100), and the lower end of the screwing mechanism (200) has a screwing head (201) for matching with the connecting bolt (11); A push-pull assembly (300) is disposed on the device body (100) and is connected in a transmission manner to the screwing mechanism (200); A torque sensing element (400) is disposed on the device body (100) and connected to the screwing mechanism (200); The push-pull assembly (300) is configured to drive at least a portion of the screwing mechanism (200) to move downward by a predetermined displacement, so that the screwing head (201) engages with the connecting bolt (11); the screwing mechanism (200) is configured to apply torque to the connecting bolt (11) through the screwing head (201); the torque detection element (400) is configured to detect the torque applied to the connecting bolt (11) through the screwing head (201) to determine whether the connecting bolt (11) is loose or broken; The screwing mechanism (200) includes a screwing assembly (210), a transmission shaft (220), and a first drive assembly (230). The screwing assembly (210) is vertically movable on the device body (100), and the screwing head (201) is located at the lower end of the screwing assembly (210). The drive shaft (220) is vertically mounted on the device body (100) and is connected to the upper end of the screwing assembly (210). The first drive assembly (230) is mounted on the device body (100) and is connected to the upper end of the drive shaft (220). The push-pull assembly (300) is connected to the screwing assembly (210) to drive the screwing assembly (210) to move up and down, and the torque detection element (400) is connected to the drive shaft (220); It also includes: a mounting base (500) and a second drive assembly (600), wherein the screwing mechanism (200), the push-pull assembly (300) and the torque sensing element (400) are connected to the mounting base (500); The second drive assembly (600) is drively connected to the mounting base (500) and is used to drive the mounting base (500) to move radially along the tower (30) so that the screw head (201) mates with the connecting bolts (11) at different radial positions. It also includes: a guide rail assembly (700) and a third drive assembly (800), the guide rail assembly (700) being coaxially connected to the lower inner side of the cabin (20), and the device body (100) being slidably connected to the bottom of the guide rail assembly (700); The third drive assembly (800) is connected to the device body (100) to drive the device body (100) to move circumferentially along the tower (30) so that the screwing head (201) mates with the connecting bolts (11) at different circumferential positions.

2. The device for detecting connecting bolts on a yaw brake according to claim 1, characterized in that, The screwing assembly (210) includes a first connecting rod (211), a second connecting rod (212), and an elastic element (213). The first connecting rod (211) is vertically movable on the device body (100), and its upper end is connected to the lower end of the transmission shaft (220). The push-pull assembly (300) is connected to the first connecting rod (211) to drive the first connecting rod (211) to move up and down. The upper end of the second connecting rod (212) is inserted into the lower end of the first connecting rod (211) and connected through the elastic element (213) to elastically press the second connecting rod (212) downward. The screw head (201) is connected to the lower end of the second connecting rod (212).

3. The apparatus for detecting connecting bolts on a yaw brake according to claim 2, characterized in that, The push-pull assembly (300) includes a mounting plate (310) and a telescopic member (320). The mounting plate (310) is sleeved on the upper end of the first connecting rod (211), and the first connecting rod (211) rotates about a vertical axis relative to the mounting plate (310). The telescopic member (320) is vertically mounted on the device body (100) and connected to the mounting plate (310) to drive the first connecting rod (211) to move up and down through the mounting plate (310).

4. The apparatus for detecting connecting bolts on a yaw brake according to claim 3, characterized in that, The first connecting rod (211) has a spline hole at its upper end, and the transmission shaft (220) has a spline shaft at its lower end that matches the spline hole. The spline shaft is inserted into the spline hole.

5. The apparatus for detecting connecting bolts on a yaw brake according to claim 2, characterized in that, The second connecting rod (212) is a flexible rod used for adaptive lateral offset adjustment of the screw head (201) to smoothly mate with the connecting bolt (11).

6. The apparatus for detecting connecting bolts on a yaw brake according to claim 1, characterized in that, Also includes: A position detection element and a controller, wherein the position detection element is used to detect the orientation of the screw head (201) relative to the connecting bolt (11); The position detection component, the screwing mechanism (200), the push-pull assembly (300), the torque detection component (400), the second drive assembly (600), and the third drive assembly (800) are electrically connected to the controller.

7. A wind turbine generator set, characterized in that, Includes the apparatus for detecting connecting bolts on a yaw brake as described in any one of claims 1 to 6.

Images