Fan variable pitch type bearing vibration fault detection structure and method

Abstract

The invention provides a fan variable pitch type bearing vibration fault detection structure and method, and the structure comprises a vibration collection unit and an adjustment unit, and the adjustment unit is used for driving the vibration collection unit to move back and forth, facilitating the contact between the vibration collection unit and an inner bearing in a variable pitch adjustment part, and collecting the vibration information of the inner bearing. When detection is needed, the adjusting unit can be rapidly controlled to drive the vibration collecting unit to make contact with the inner bearing of the variable pitch bearing, then efficient detection work is carried out, after detection is completed, the vibration collecting unit can be automatically withdrawn, and maintenance treatment of detection equipment is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbine pitch bearing detection, and specifically relates to a vibration fault detection structure and method for wind turbine pitch bearings. Background Art

[0002] The main function of pitch is to effectively capture wind energy. In actual operation, pitch is mainly divided into two methods: electric and hydraulic. The blade can change within the range of 0° to 90° driven by a pitch motor or a toothed belt. When the blade operates at 0°, it faces the wind direction and is on the windward side; while in the shutdown state, the blade will turn to 90°, and at this time it is on the leeward side.

[0003] The patent publication number is CN113554602A, which relates to a method for monitoring a wind turbine pitch bearing, aiming to solve the technical problems of high labor cost and hardware cost, low detection efficiency and accuracy in the existing health status monitoring of wind turbine pitch bearings. The method steps include: respectively orienting at least three cameras towards the bolts at the connection hub positions of the three pitch bearings of the wind turbine; real-time monitoring the bolts within the camera's field of view, and recording the first image as a pre-stored image; processing the monitored images to determine whether they are images during the rotation of the pitch bearing; if so, recording them as valid images and replacing the pre-stored image with the valid image; transmitting the valid image information to the server, obtaining the bolt images at the connection hub positions of the pitch bearing in a video manner, and cooperating with a unique algorithm for rotation detection and recognition, which can accurately and efficiently monitor the wind turbine pitch bearing.

[0004] The existing vibration fault detection structure for wind turbine pitch bearings cannot perform real-time detection and adjustment. Therefore, when the equipment vibrates, it cannot detect and repair in a timely manner, which may cause equipment damage problems and needs to be improved. Summary of the Invention

[0005] The purpose of the present invention is to provide a vibration fault detection structure and method for wind turbine pitch bearings, which solves the defect that the existing vibration fault detection structure for wind turbine pitch bearings cannot perform real-time detection and adjustment, resulting in the inability to timely warn of the faults of the pitch bearings.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: The vibration fault detection structure for wind turbine pitch bearings provided by the present invention includes a vibration acquisition unit and an adjustment unit. Among them, the adjustment unit is used to drive the vibration acquisition unit to move back and forth, facilitating the vibration acquisition unit to contact the inner bearing in the pitch adjustment component for collecting the vibration information of the inner bearing.

[0007] Preferably, the pitch adjustment component includes a mating seat, a docking connection frame, an inner bearing, and an outer bearing. The inner ring of the outer bearing is rotationally connected to the inner bearing, and the mating seat is sleeved on the docking connection frame; the docking connection frame is drivingly connected to the fan blade of the wind turbine. The adjustment unit is installed on the mating seat. One end of the vibration acquisition unit is fixed on the adjustment unit, and the other end is in contact with the inner bearing through the drive of the adjustment unit, for collecting the vibration information of the inner bearing.

[0008] Preferably, the adjustment unit includes a hydraulic control seat and a hydraulic control rod. Among them, a plurality of installation grooves are evenly distributed along the circumferential direction on the side wall of the mating seat, and a hydraulic control seat is installed in each installation groove. Each hydraulic control seat is provided with a hydraulic control rod, and the hydraulic control rod is drivingly connected to the vibration acquisition unit.

[0009] Preferably, the vibration acquisition unit includes an adjustment seat frame and a vibration sensor. Among them, the adjustment seat frame is fixedly installed on the adjustment unit, and the vibration sensor is fixedly installed on the adjustment seat frame.

[0010] Preferably, the pitch adjustment component includes a mating seat, a docking connection frame, an inner bearing, and an outer bearing. The inner ring of the outer bearing is rotationally connected to the inner bearing, and the mating seat is sleeved on the docking connection frame; the docking connection frame is drivingly connected to the fan blade of the wind turbine. The adjustment unit includes a hydraulic control seat and a hydraulic control rod. Among them, a plurality of installation grooves are evenly distributed along the circumferential direction on the side wall of the mating seat, and a hydraulic control seat is installed in each installation groove. Each hydraulic control seat is provided with a hydraulic control rod, and the hydraulic control rod is drivingly connected to the vibration acquisition unit.

[0011] Preferably, the pitch adjustment component includes a mating seat, a docking connection frame, an inner bearing, and an outer bearing. The inner ring of the outer bearing is rotationally connected to the inner bearing, and the mating seat is sleeved on the docking connection frame; the docking connection frame is drivingly connected to the fan blade of the wind turbine. The adjustment unit includes a hydraulic control seat and a hydraulic control rod. Among them, a plurality of installation grooves are evenly distributed along the circumferential direction on the side wall of the mating seat, and a hydraulic control seat is installed in each installation groove. Each hydraulic control seat is provided with a hydraulic control rod, and the hydraulic control rod is drivingly connected to the vibration acquisition unit; The vibration acquisition unit includes an adjustment seat frame and a vibration sensor. Among them, the adjustment seat frame is fixedly installed on the hydraulic control rod, and the vibration sensor is fixedly installed on the adjustment seat frame.

[0012] The method for detecting the vibration fault of the pitch bearing of a wind turbine, based on the above-mentioned device, includes the following steps: When detecting the pitch bearing, the movement of the vibration acquisition unit is controlled by the adjustment unit until it contacts the inner bearing in the pitch adjustment system, and vibration detection is carried out by the vibration acquisition unit. After the detection is completed, the movement of the vibration acquisition unit is controlled by the adjustment unit to disengage from the inner bearing in the pitch adjustment system.

[0013] A wind turbine, the wind turbine includes a wind turbine structure, the wind turbine structure includes a fan blade, a docking shaft and a docking ring frame, wherein: A fan blade is fixedly connected to the side end of the docking shaft, a docking ring frame is fixedly connected to the other side of the docking shaft, and a pitch adjustment component is rotatably connected to the center of the docking ring frame, and the vibration fault detection structure is installed on the pitch adjustment component.

[0014] Preferably, the wind turbine structure is drivingly connected to a nacelle.

[0015] Preferably, a counterweight frame is fixedly connected to the upper end of the nacelle, a docking rod is fixedly connected to the lower end of the nacelle, and a fastening bottom rod is fixedly connected to the free end of the docking rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The pitch-bearing vibration fault detection structure of the wind turbine provided by the present invention installs the pitch-bearing vibration fault detection component at the pitch bearing. When detection is required, the adjustment unit can quickly drive the vibration acquisition unit to contact the inner bearing of the pitch bearing, and then carry out efficient detection work. When the detection is completed, the vibration acquisition unit can be automatically retracted, which is helpful for the maintenance of the detection equipment. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the wind turbine; Figure 2 is a schematic diagram of the overall structure of the wind turbine; Figure 3 is a schematic diagram of the overall structure of the wind turbine; Figure 4 is a schematic diagram of the exploded structure of the wind turbine; Figure 5 is a schematic diagram of the wind turbine structure; Figure 6 is a schematic diagram of the vibration fault detection structure; Figure 7 is a schematic diagram of the pitch adjustment component; Among them, 1. fan structure; 2. nacelle; 3. counterweight frame; 4. docking rod; 5. fastening bottom rod; 6. fan blade; 7. docking shaft; 8. docking ring frame; 9. pitch adjustment component; 10. mating seat; 11. docking connection frame; 12. inner bearing; 13. outer bearing; 14. vibration sensor; 15. adjustment seat frame; 16. hydraulic control rod; 17. hydraulic control seat. Detailed implementation manners

[0018] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are proposed to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0019] It should be understood that when used in the specification of the present application and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0020] It should also be understood that the term "and / or" used in the specification of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0021] As used in the specification of the present application and the appended claims, the term "if" can be interpreted as "when", "once", "in response to a determination", or "in response to a detection" according to the context. Similarly, the phrase "if a determination is made" or "if [the described condition or event] is detected" can be interpreted as meaning "once a determination is made", "in response to a determination", "once [the described condition or event] is detected", or "in response to a detection of [the described condition or event]" according to the context.

[0022] In addition, in the description of the specification of the present application and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0023] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that specific features, structures, or characteristics described in connection with that embodiment are included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in some other embodiments", "in still some other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0024] Embodiment 1 The vibration fault detection structure of the wind turbine pitch bearing provided in this embodiment includes a vibration acquisition unit and an adjustment unit. Among them, the adjustment unit is used to drive the vibration acquisition unit to move back and forth, so as to facilitate the vibration acquisition unit to contact the inner bearing in the pitch adjustment component, and is used to collect the vibration information of the inner bearing.

[0025] Embodiment 2 Based on Embodiment 1, the vibration fault detection structure of the wind turbine pitch bearing provided in this embodiment, the pitch adjustment component includes a mating seat, a docking connection frame, an inner bearing and an outer bearing. The inner ring of the outer bearing is rotatably connected to the inner bearing, and the mating seat is sleeved on the docking connection frame; the docking connection frame is drivingly connected to the fan blade of the wind turbine.

[0026] The adjustment unit includes a hydraulic control seat and a hydraulic control rod. Among them, a plurality of mounting grooves are evenly distributed along the circumferential direction on the side wall of the mating seat. Each mounting groove is provided with a hydraulic control seat, and each hydraulic control seat is provided with a hydraulic control rod, and the hydraulic control rod is drivingly connected to the vibration acquisition unit.

[0027] The vibration acquisition unit includes an adjustment seat frame and a vibration sensor. Among them, the adjustment seat frame is fixedly installed on the adjustment unit, and the vibration sensor is fixedly installed on the adjustment seat frame.

[0028] Embodiment 3 Based on Embodiment 1, the vibration fault detection structure of the wind turbine pitch bearing provided in this embodiment, the pitch adjustment component includes a mating seat, a docking connection frame, an inner bearing and an outer bearing. The inner ring of the outer bearing is rotatably connected to the inner bearing, and the mating seat is sleeved on the docking connection frame; the docking connection frame is drivingly connected to the fan blade of the wind turbine.

[0029] The adjustment unit includes a motor. A gear is installed on the output shaft of the motor. The gear meshes with a rack, and the free end of the rack is fixedly installed with a vibration sensor for collecting the vibration information of the inner bearing.

[0030] A plurality of mounting grooves are evenly distributed along the circumferential direction of the side wall of the mating seat, and a motor is installed in each mounting groove.

[0031] A mounting hole is provided at the bottom of each mounting groove, and the end of the rack meshing with the gear is placed in the mounting hole.

[0032] When detection is required, the controller controls the forward rotation of the motor to start. The motor drives the rack to extend through the gear, and then drives the vibration sensor to contact the inner bearing. After the detection is completed, the motor is controlled to reverse, and the motor drives the rack to contract. At this time, the end of the rack meshing with the gear contracts into the mounting hole.

[0033] Embodiment 4 The vibration fault detection structure for the pitch-changing bearing of the fan provided in this embodiment includes a fan structure 1, a nacelle 2, a counterweight frame 3, a docking rod 4, and a fastening bottom rod 5, where: A counterweight frame 3 is fixedly connected to the upper end of the nacelle 2, a docking rod 4 is fixedly connected to the lower end of the nacelle 2, and a fastening bottom rod 5 is fixedly connected to the free end of the docking rod 4.

[0034] A fan structure 1 is rotatably connected to the side end of the nacelle 2.

[0035] The fan structure 1 includes a fan blade 6, a docking shaft 7, a docking ring frame 8, and a pitch adjustment component 9. A fan blade 6 is fixedly connected to the side end of the docking shaft 7, and a docking ring frame 8 is fixedly connected to the other side of the docking shaft 7. The center of the docking ring frame 8 is rotatably connected to a pitch adjustment component 9.

[0036] The pitch adjustment component 9 includes a mating seat 10, a docking connection frame 11, an inner bearing 12, and an outer bearing 13. An inner bearing 12 is rotatably connected to the inner ring position of the outer bearing 13. The side end of the columnar docking connection frame 11 is fixedly connected to the docking shaft 7, and the mating seat 10 is sleeved on the outer end of the docking connection frame 11.

[0037] A hydraulic control seat 17 is fixedly connected to the mating seat 10. A hydraulic control rod 16 is installed on the hydraulic control seat 17. The upper end of the hydraulic control rod 16 controls the telescopic connection of an adjustment seat frame 15, and a vibration sensor 14 is installed at the upper end of the adjustment seat frame 15.

[0038] The side end of the docking connection frame 11 is fixedly connected to the nacelle 2. The pitch adjustment component 9 rotates and adjusts within the docking ring frame 8, and the inner bearing 12 and the outer bearing 13 rotate relative to each other. The vibration sensor 14 can contact the inner bearing 12, and vibration detection and analysis work are carried out through the contact.

[0039] The working process of this embodiment is as follows: Under the control of the adjustment mount 15, the vibration sensor 14 can be telescopically adjusted. When detection is required, the hydraulic control rod 16 controls the movement of the adjustment mount 15 on the mating seat 10 at this time, thereby driving the vibration sensor 14 to adjust its height, so that the vibration sensor 14 contacts the inner bearing 12, and then the vibration detection and analysis are carried out. When the detection is completed, the vibration sensor 14 can be withdrawn through the adjustment mount 15 and the hydraulic control rod 16, which is convenient for the maintenance of the vibration sensor 14.

[0040] The lower end of the nacelle 2 is supported by the docking rod 4. The fan blade 6 in the fan structure 1 rotates with the docking shaft 7. At the same time, the docking shaft 7 is connected to the pitch adjustment component 9 through the docking ring frame 8, and power transmission can be carried out. The docking connection frame 11 is fixed to the docking shaft 7. When the docking shaft 7 rotates, it drives the docking connection frame 11 to rotate accordingly, thereby conducting the power to the inside of the nacelle 2 for subsequent power supply processing work. The docking connection frame 11 moves synchronously with the mating seat 10. At the same time, the inner bearing 12 and the outer bearing 13 rotate and adjust. Although the overall rotation is synchronous, in the normal rotation state, the detection value remains constant. When the inner bearing 12 vibrates, the vibration sensor 14 will contact the inner bearing 12, and the value at this time will fluctuate, so as to judge the vibration situation.

[0041] The docking rod 4 and the fastening bottom rod 5 are fixedly connected to support the nacelle 2. A counterweight frame 3 is fixedly provided on the nacelle 2 to increase the weight at the top. A fan structure 1 is rotatably connected to the nacelle 2, and the fan structure 1 can be driven to rotate by the wind, and then power generation processing is carried out through the power generation equipment in the nacelle 2.

[0042] The fan blade 6 and the docking shaft 7 in the fan structure 1 are fixedly connected, and the side end of the docking shaft 7 is fixed to the docking ring frame 8. A pitch adjustment component 9 is provided at the center of the docking ring frame 8. Through the rotation of the fan blade 6, the docking connection frame 11 in the pitch adjustment component 9 is driven to rotate accordingly. The rotation of the docking connection frame 11 can act inside the nacelle 2 for power generation processing work.

[0043] A hydraulic control rod 16 and a hydraulic control seat 17 are fixedly connected to the mating seat 10, and the hydraulic control rod 16 can control the height adjustment of the adjustment mount 15. When vibration detection is required, the adjustment mount 15 controls the height adjustment of the vibration sensor 14 at this time. At this time, the vibration sensor 14 contacts the inner bearing 12, and the vibration condition of the inner bearing 12 can be sensed, so as to analyze the vibration cause and facilitate the detection work. When the detection is completed, the hydraulic control rod 16 retracts the vibration sensor 14 and the adjustment mount 15, which is convenient for the protection of the vibration sensor 14.

[0044] Embodiment 5 The method for detecting vibration faults of the pitch bearing of a wind turbine provided in this embodiment is based on the vibration fault detection structure of the pitch bearing of the wind turbine. This structure includes a vibration acquisition unit and an adjustment unit. Among them, the adjustment unit is used to drive the vibration acquisition unit to move back and forth, facilitating the contact between the vibration acquisition unit and the inner bearing in the pitch adjustment component, and is used to collect the vibration information of the inner bearing, including the following steps: When detecting the pitch bearing, the adjustment unit controls the movement of the vibration acquisition unit until it contacts the inner bearing in the pitch adjustment system, and vibration detection is performed through the vibration acquisition unit; After the detection is completed, the adjustment unit controls the movement of the vibration acquisition unit to separate from the inner bearing in the pitch adjustment system.

[0045] Embodiment 6 This embodiment provides a wind turbine, which includes a wind turbine structure. The wind turbine structure includes a fan blade, a docking shaft, and a docking ring frame, where: A fan blade is fixedly connected to the side end of the docking shaft, and a docking ring frame is fixedly connected to the other side of the docking shaft. Moreover, a pitch adjustment component is rotatably connected to the center of the docking ring frame, and a vibration fault detection structure is installed on the pitch adjustment component.

[0046] The pitch adjustment component includes a mating seat, a docking connection frame, an inner bearing, and an outer bearing. The inner ring of the outer bearing is rotatably connected to the inner bearing, and a mating seat is sleeved on the docking connection frame; the docking connection frame is drivingly connected to the fan blade of the wind turbine.

[0047] The vibration fault detection structure includes a vibration acquisition unit and an adjustment unit, where: The adjustment unit includes a hydraulic control seat and a hydraulic control rod. A plurality of installation grooves are evenly distributed along the circumferential direction on the side wall of the mating seat. Each installation groove is provided with a hydraulic control seat, and each hydraulic control seat is provided with a hydraulic control rod, and the hydraulic control rod is drivingly connected to the vibration acquisition unit.

[0048] The vibration acquisition unit includes an adjustment seat frame and a vibration sensor. Among them, the adjustment seat frame is fixedly installed on the adjustment unit, and the vibration sensor is fixedly installed on the adjustment seat frame.

[0049] Embodiment 8 This embodiment provides a wind turbine, which includes a wind turbine structure. The wind turbine structure includes a fan blade, a docking shaft, and a docking ring frame, where: A fan blade is fixedly connected to the side end of the docking shaft, and a docking ring frame is fixedly connected to the other side of the docking shaft. Moreover, a pitch adjustment component is rotatably connected to the center of the docking ring frame, and a vibration fault detection structure is installed on the pitch adjustment component.

[0050] The pitch adjustment component includes a mating seat, a docking connection frame, an inner bearing and an outer bearing. The inner ring of the outer bearing is rotatably connected to the inner bearing, and the mating seat is sleeved on the docking connection frame; the docking connection frame is drivingly connected to the fan blade of the wind turbine.

[0051] The vibration fault detection structure includes a vibration sensor and an adjustment unit, where: The adjustment unit includes a motor. A gear is installed on the output shaft of the motor. The gear meshes with a rack, and a vibration sensor for collecting the vibration information of the inner bearing is fixedly installed at the free end of the rack.

[0052] A plurality of mounting grooves are evenly distributed along the circumferential direction of the side wall of the mating seat, and a motor is installed in each mounting groove.

[0053] An installation hole is opened at the bottom of each installation groove, and one end of the rack meshing with the gear is placed in the installation hole.

[0054] Embodiment 9 A wind turbine, the wind turbine includes a wind turbine structure, the wind turbine structure includes a fan blade, a docking shaft and a docking ring frame, where: The side end of the docking shaft is fixedly connected to the fan blade, the other side of the docking shaft is fixedly connected to the docking ring frame, and the pitch adjustment component is rotatably connected to the center of the docking ring frame. The vibration fault detection structure is installed on the pitch adjustment component.

[0055] The wind turbine structure is drivingly connected to the nacelle.

[0056] A counterweight frame is fixedly connected to the upper end of the nacelle, a docking rod is fixedly connected to the lower end of the nacelle, and a fastening bottom rod is fixedly connected to the free end of the docking rod.

[0057] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A wind turbine variable pitch bearing vibration fault detection structure, characterized in that: It comprises a vibration collection unit and an adjustment unit, wherein the adjustment unit is used to drive the vibration collection unit to move back and forth, so as to facilitate the contact between the vibration collection unit and the inner bearing in the pitch adjustment component, so as to collect vibration information of the inner bearing.

2. The wind turbine variable pitch bearing vibration fault detection structure according to claim 1, characterized in that: The pitch adjustment component comprises a matching seat, a docking connection frame, an inner bearing and an outer bearing, the inner ring of the outer bearing is rotatably connected to the inner bearing, and the docking connection frame is sleeved with a matching seat; the docking connection frame is drivingly connected to the fan blades of the fan; The adjustment unit is installed on the matching seat, one end of the vibration adopting unit is fixed on the adjustment unit, and the other end is driven by the adjustment unit to contact the inner bearing for collecting vibration information of the inner bearing.

3. The wind turbine variable pitch bearing vibration fault detection structure according to claim 2 is characterized in that: The adjustment unit includes a hydraulic control seat and a hydraulic control rod, wherein a plurality of mounting grooves are evenly distributed along the circumference of the side wall of the matching seat, a hydraulic control seat is installed in each mounting groove, and a hydraulic control rod is installed in each hydraulic control seat, and the hydraulic control rod is connected to the vibration unit drive.

4. The wind turbine variable pitch bearing vibration fault detection structure according to claim 1, characterized in that: The vibration adopting unit comprises an adjusting seat frame and a vibration sensor, wherein the adjusting seat frame is fixedly mounted on the adjusting unit, and the vibration sensor is fixedly mounted on the adjusting seat frame.

5. The wind turbine variable pitch bearing vibration fault detection structure according to claim 1, characterized in that: The pitch adjustment component comprises a matching seat, a docking connection frame, an inner bearing and an outer bearing, the inner ring of the outer bearing is rotatably connected to the inner bearing, and the docking connection frame is sleeved with a matching seat; the docking connection frame is drivingly connected to the fan blades of the fan; The adjustment unit includes a hydraulic control seat and a hydraulic control rod, wherein a plurality of mounting grooves are evenly distributed along the circumference of the side wall of the matching seat, a hydraulic control seat is installed in each mounting groove, and a hydraulic control rod is installed in each hydraulic control seat, and the hydraulic control rod is driven and connected to the vibration unit.

6. The wind turbine variable pitch bearing vibration fault detection structure according to claim 1, characterized in that: The pitch adjustment component comprises a matching seat, a docking connection frame, an inner bearing and an outer bearing, the inner ring of the outer bearing is rotatably connected to the inner bearing, and the docking connection frame is sleeved with a matching seat; the docking connection frame is drivingly connected to the fan blades of the fan; The adjustment unit comprises a hydraulic control seat and a hydraulic control rod, wherein a plurality of mounting grooves are evenly distributed along the circumference of the side wall of the matching seat, a hydraulic control seat is installed in each mounting groove, and a hydraulic control rod is installed in each hydraulic control seat, and the hydraulic control rod is drivingly connected to the vibration adopting unit; The vibration adopting unit comprises an adjusting seat frame and a vibration sensor, wherein the adjusting seat frame is fixedly mounted on a hydraulic control rod, and the vibration sensor is fixedly mounted on the adjusting seat frame.

7. A method for detecting vibration faults of wind turbine pitch bearings, characterized in that: The device according to any one of claims 1 to 6 comprises the following steps: When testing the pitch bearing, the vibration collection unit is controlled to move by the adjustment unit until it contacts the inner bearing in the pitch adjustment system, and vibration detection is performed by the vibration collection unit; After the detection is completed, the vibration collection unit is controlled by the adjustment unit to move and disengage from the inner bearing in the pitch adjustment system.

8. A fan, characterized in that: The fan comprises a fan structure, and the fan structure comprises fan blades, a docking shaft and a docking ring frame, wherein: The side end of the docking shaft is fixedly connected to a fan blade, the other side of the docking shaft is fixedly connected to a docking ring frame, and the center of the docking ring frame is rotatably connected to a pitch adjustment component, on which the vibration fault detection structure according to claim 1 is installed.

9. The wind turbine variable pitch bearing vibration fault detection structure according to claim 8, characterized in that: The fan structure is drivingly connected to the cabin.

10. The wind turbine variable pitch bearing vibration fault detection structure according to claim 9, characterized in that: The upper end of the cabin is fixedly connected with a counterweight frame, the lower end of the cabin is fixedly connected with a docking rod, and the free end of the docking rod is fixedly connected with a fastening bottom rod.

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