Self-adjusting type wind turbine generator set variable pitch bearing cracking monitoring device

Abstract

The utility model provides a self-adjusting wind turbine generator set pitch bearing crack monitoring device, which comprises an outer bearing, an inner bearing, bearing holes and an external control device, the inner bearing rotates in the outer bearing, the bearing holes are arranged in the inner bearing and the bearing holes in an annular array, and the wind turbine generator set pitch bearing crack monitoring device is used for monitoring the pitch bearing crack of the wind turbine generator set. The position of the detector can be dynamically adjusted according to the diameter and the distance of the bearing hole through sliding fit of the driving plate and the telescopic plate of the adjusting mechanism, when the size of the bearing hole changes, the external control device can drive the driving plate to slide in the first fixing plate, and meanwhile the telescopic plate stretches out and draws back synchronously, so that the detector is accurately aligned with the bearing holes with different hole diameters. Besides, the size of the detection window is matched with the distance between the bearing holes, a second fixing plate can be elastically extruded through a buffer pad in cooperation with an adjusting structure of a threaded rod and a bolt, it is ensured that the upper surfaces and the lower surfaces of the bearings of different sizes are stably clamped, and the problem that a traditional device cannot be matched with the bearing holes of multiple sizes due to a fixing structure is solved.

Description

Technical Field

[0001] This utility model relates to the field of wind power component monitoring technology, specifically a self-adjusting wind turbine pitch bearing crack monitoring device. Background Technology

[0002] Wind power component monitoring refers to the comprehensive inspection and testing of all components in a wind turbine generator set to ensure its normal operation and safety. The inspection covers multiple aspects, including mechanical parts, electrical systems, and structural components. Currently, wind turbines operate in harsh environments such as high altitudes, strong winds, and large temperature differences. Components (such as gearboxes, bearings, and blades) are susceptible to fatigue loads, corrosion, and wear. Manufacturing defects or operational malfunctions can lead to downtime, soaring maintenance costs (e.g., daily losses from a single offshore wind turbine downtime can reach tens of thousands of yuan), and even safety accidents (e.g., blade breakage and fall).

[0003] Pitch bearings are critical components in wind turbines, primarily used to connect the turbine blades and hub, and to control the blade rotation angle (i.e., pitch control). Their core functions are: adjusting blade angle, bearing complex loads, ensuring safe operation, and improving power generation efficiency. Therefore, monitoring the cracking condition of pitch bearings is necessary during wind turbine maintenance. Currently, there are some reports in this field regarding monitoring the bearing bores in pitch bearings; however, these monitoring devices are all fixed structures and cannot adapt to the monitoring of pitch bearings with multi-sized bearing bores. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing technologies cannot flexibly adapt to the monitoring of bearing holes of various sizes, and to propose a self-adjusting wind turbine pitch bearing crack monitoring device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A self-adjusting wind turbine pitch bearing crack monitoring device includes an outer bearing, an inner bearing, bearing holes, an external control device, and a detector. The detector is electrically connected to the external control device. The inner bearing rotates inside the outer bearing. The bearing holes are arranged in a ring array inside the inner and outer bearings. The device also includes:

[0007] The first fixing plate is fitted to the bottom of the inner bearing and the outer bearing, and the first slot is provided on the outer side of the first fixing plate;

[0008] The second fixing plate is fitted to the top of the inner bearing and the outer bearing. A second slot is provided on the outer side of the second fixing plate. The detector is installed in the second slot and detects the bearing hole.

[0009] The traveling drive mechanism is installed between the first fixed plate and the second fixed plate and is located inside the inner bearing. It includes a drive gear that meshes with the inner tooth surface of the inner bearing. The drive gear is electrically connected to an external control device.

[0010] The traveling clamping mechanism is installed between the first fixed plate and the second fixed plate and is located outside the outer bearing. It includes a torsion spring and a rubber roller that is elastically clamped on the outer circular surface of the outer bearing by the torsion spring. The rubber roller rolls on the outer circular surface of the outer bearing and keeps in close contact with the outer circular surface of the outer bearing under the elastic drive of the torsion spring.

[0011] The adjustment mechanism includes a drive plate installed in a first slot for radial dimension adjustment, and a telescopic plate connected between the drive plate and the detector for axial dimension adjustment, wherein the drive plate is electrically connected to an external control device.

[0012] Furthermore, the traveling drive mechanism includes a first fixed rod, a first gear, a second gear, and a threaded rod. The bottom end of the first fixed rod is fixed to the upper surface of the first fixed plate, and the top end of the first fixed rod slides through the second fixed plate. The threaded rod is fixedly connected to the top of the first fixed rod, and bolts are installed on the threaded rod to fix the second fixed plate. The first gear and the second gear are sleeved on the first fixed rod and mesh with the inner tooth surface of the inner bearing. Under the drive of the external control device, the two gears roll along the inner tooth surface of the inner bearing.

[0013] Furthermore, a buffer pad is fixedly connected to the bottom end of the bolt, and the bolt presses against the upper surface of the second fixing plate through the buffer pad.

[0014] Furthermore, the traveling clamping mechanism includes two sets of clamping components, which are symmetrically installed on the left and right sides of the telescopic plate.

[0015] Furthermore, the clamping assembly includes a fixing block, a second fixing rod, a torsion spring, a support plate, a circular groove plate, and a rubber roller; the fixing block consists of two parts, upper and lower, which are respectively fixed to the top surface of the drive plate and the side surface of the telescopic plate; the second fixing rod is disposed between the upper and lower fixing blocks; the torsion spring is sleeved on both ends of the second fixing rod, and both ends of the torsion spring are fixedly connected to the second fixing rod and the fixing block, respectively; one end of the support plate is fixedly connected to the second fixing rod, and the other end of the support plate is fixedly connected to the circular groove plate; the rubber roller is installed inside the circular groove plate and can roll.

[0016] Furthermore, a detection window communicating with the second slot is provided on the bottom surface of the second fixing plate. The detection window corresponds to the position of the bearing hole, and the detector detects the bearing hole through the detection window.

[0017] Furthermore, the drive plate is installed in the first slot and can slide in the first slot under the drive of an external control device. When the drive plate slides, it drives the detector to slide synchronously through a telescopic plate, thereby adjusting the radial dimension.

[0018] Furthermore, the telescopic plate is an elastic telescopic plate with an elastic tension spring inside. Under the action of the elastic tension spring, the detector and the second fixing plate are always in contact with the upper surfaces of the outer bearing and the inner bearing.

[0019] Compared with the prior art, the self-adjusting wind turbine pitch bearing crack monitoring device provided by this utility model has the following advantages:

[0020] 1. This self-adjusting wind turbine pitch bearing crack monitoring device dynamically adjusts the detector position according to the diameter and spacing of the bearing holes through the sliding cooperation of the drive plate and telescopic plate of the adjustment mechanism. When the bearing hole size changes, the external control device can drive the drive plate to slide within the first fixed plate, while the telescopic plate extends and retracts synchronously, ensuring that the detector is precisely aligned with bearing holes of different diameters. Furthermore, the size of the detection window is adapted to the bearing hole spacing, and with the adjustment structure of the threaded rod and bolts, the second fixed plate can be elastically compressed through the buffer pad, ensuring that the upper and lower surfaces of bearings of different sizes are stably clamped. This solves the problem that traditional devices cannot adapt to bearing holes of multiple sizes due to their fixed structure.

[0021] 2. This self-adjusting wind turbine pitch bearing crack monitoring device adapts to different outer bearing diameters via a rubber roller in the drive mechanism, which, through the elastic action of a torsion spring, allows the rubber roller to rotate under pressure, driving the second fixed rod. The reverse force of the torsion spring keeps the rubber roller in close contact with the outer wall of the bearing, preventing detection offset caused by size differences. Simultaneously, the first and second gears mesh with the inner bearing for transmission, and an external control device can drive the gear set to rotate the entire monitoring device, causing the detector to rotate synchronously along the annular array of bearing holes. This enables full circumferential detection of bearings with different diameters. This design breaks through the size limitations of traditional fixed drive structures, ensuring that the detector can stably and comprehensively capture crack signals in bearing holes when multiple bearing sizes are in operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a self-adjusting wind turbine pitch bearing crack monitoring device proposed in this utility model.

[0023] Figure 2 This is a schematic diagram of the inner bearing and the second fixed plate structure in a self-adjusting wind turbine pitch bearing crack monitoring device proposed in this utility model.

[0024] Figure 3This is a partial structural diagram of the adjustment component in a self-adjusting wind turbine pitch bearing crack monitoring device proposed in this utility model.

[0025] Figure 4 This is a schematic diagram of the threaded rod and drive plate structure in a self-adjusting wind turbine pitch bearing crack monitoring device proposed in this utility model.

[0026] Figure 5 This is a schematic diagram of the torsion spring and circular groove plate structure in a self-adjusting wind turbine pitch bearing crack monitoring device proposed in this utility model.

[0027] Figure 6 This is a schematic diagram of the second fixed rod and rubber roller structure in a self-adjusting wind turbine pitch bearing crack monitoring device proposed in this utility model.

[0028] In the diagram: 101, outer bearing; 102, inner bearing; 103, bearing hole; 201, first fixed plate; 202, adjusting mechanism; 2031, drive plate; 2032, telescopic plate; 2033, detector; 2034, second fixed plate; 2035, first fixed rod; 2036, threaded rod; 2037, bolt; 2038, buffer pad; 2039, detection window; 301, fixed block; 302, traveling drive mechanism; 303, traveling clamping mechanism; 3031, second fixed rod; 3032, torsion spring; 3033, support plate; 3034, circular groove plate; 3035, rubber roller; 3036, first gear; 3037, second gear. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0031] Example: Refer to Appendix Figures 1 to 6As shown in the figure, the self-adjusting wind turbine pitch bearing crack monitoring device provided in this embodiment includes an outer bearing 101, an inner bearing 102, a bearing hole 103, an external control device, and a detector 2033. The detector 2033 is electrically connected to the external control device. The inner bearing 102 rotates inside the outer bearing 101. The bearing holes 103 are arranged in a ring array inside the inner bearing 102 and the outer bearing 101.

[0032] A first fixing plate 201 is fitted to the bottom of the inner bearing 102 and the outer bearing 101, and a first slot is provided on the outer side of the first fixing plate 201; a second fixing plate 2034 is fitted to the top of the inner bearing 102 and the outer bearing 101, and a second slot is provided on the outer side of the second fixing plate 2034, and the detector 2033 is installed in the second slot to detect the bearing hole 103; a detection window 2039 communicating with the second slot is provided on the bottom surface of the second fixing plate 2034, and the detection window 2039 corresponds to the position of the bearing hole 103, and the detector 2033 detects the bearing hole 103 through the detection window.

[0033] The traveling drive mechanism 302 is installed between the first fixed plate 201 and the second fixed plate 2034, and is located inside the inner bearing 102. The traveling drive mechanism includes a first fixed rod 2035, a first gear 3036, a second gear 3037, and a threaded rod 2036. The bottom end of the first fixed rod 2035 is fixed to the upper surface of the first fixed plate 201, and the top end of the first fixed rod 2035 slides through the second fixed plate 2034. The threaded rod 2036 is fixedly connected to the top of the first fixed rod 2035, and a bolt 2037 is installed on the threaded rod 2036 to fix the second fixed plate 2034. The first gear 3036 and the second gear 3037 are sleeved on the first fixed rod 2035 and mesh with the inner tooth surface of the inner bearing 102. The two gears roll along the inner tooth surface of the inner bearing 102 under the drive of an external control device. The bottom end of the bolt 2037 is fixedly connected to a buffer pad 2038, and the bolt 2037 presses against the upper surface of the second fixing plate 2034 through the buffer pad 2038.

[0034] The traveling clamping mechanism 303 is installed between the first fixed plate 201 and the second fixed plate 2034, and is located outside the outer bearing 101. The traveling clamping mechanism includes two sets of clamping components, which are symmetrically installed on the left and right sides of the telescopic plate 2032. The clamping assembly includes a fixing block 301, a second fixing rod 3031, a torsion spring 3032, a support plate 3033, a circular groove plate 3034, and a rubber roller 3035. The fixing block 301 consists of two parts, upper and lower, which are respectively fixed to the top surface of the drive plate 2031 and the side surface of the telescopic plate 2032. The second fixing rod 3031 is disposed between the upper and lower fixing blocks 301. The torsion spring 3032 is sleeved on both ends of the second fixing rod 3031, and both ends of the torsion spring 3032 are fixedly connected to the second fixing rod 3031 and the fixing block 301, respectively. One end of the support plate 3033 is fixedly connected to the second fixing rod 3031, and the other end of the support plate 3033 is fixedly connected to the circular groove plate 3034. The rubber roller 3035 is installed inside the circular groove plate 3034 and can roll.

[0035] The adjustment mechanism 202 includes a drive plate 2031 installed in a first slot for radial dimension adjustment, and a telescopic plate 2032 connected between the drive plate 2031 and the detector 2033 for axial dimension adjustment. The drive plate 2031 is electrically connected to an external control device. The drive plate 2031 is installed in the first slot and can slide within the first slot under the drive of the external control device. When the drive plate 2031 slides, it drives the detector 2033 to slide synchronously through the telescopic plate 2032, thereby adjusting the radial dimension. The telescopic plate 2032 is an elastic telescopic plate with an elastic tension spring inside. Under the action of the elastic tension spring, the detector 2033 and the second fixed plate 2034 are always in contact with the upper surfaces of the outer bearing 101 and the inner bearing 102.

[0036] The following describes the working process and principle of the above embodiments:

[0037] First, the operator positions the first and second gears in their meshing positions with the inner bearing, and places the first fixing plate in position where the lower surfaces of the outer and inner bearings meet. Then, the second fixing plate is fitted onto the top of the first fixing rod, and a bolt is fitted onto the outer wall of the threaded rod. The outer and inner bearings are then placed between the second and first fixing plates. The operator then tightens the bolt downwards, causing it to move downwards on the outer wall of the threaded rod. This causes the bolt to press against the upper surface of the second fixing plate through the buffer pad, moving the buffer pad against the second fixing plate towards the outer and inner bearings, thus bringing the second fixing plate into contact with their upper surfaces. The extension length of the telescopic plate is then adjusted to align the detector with the second slot and the drive plate with the first fixing plate. The drive plate and detector are then inserted into the first fixing plate and the second slot, respectively. An external control device then controls the drive plate to move inwards towards the first fixing plate, causing the drive plate to move synchronously with the telescopic plate, which in turn moves the detector synchronously into the second slot. The plate drives the second fixed rod and torsion spring to move synchronously via the fixed block. The second fixed rod, through the support plate and circular groove plate, drives the rubber roller to move closer to the outer bearing, causing the rubber roller to contact the outer wall of the outer bearing. This contact causes the rubber roller to drive the torsion spring to rotate in the opposite direction, resulting in elastic contact between the rubber roller and the outer bearing. The second and first fixed plates then contact the upper and lower surfaces of the inner and outer bearings, and the rubber roller again elastically contacts the outer wall of the outer bearing. The operator then controls the first and second gears to rotate on the inner wall of the inner bearing via an external control device. This causes the second and first gears to drive the circular groove plate and the first fixed plate to rotate synchronously. The circular groove plate and the first fixed plate, through the telescopic plate, drive the rubber roller to move synchronously on the outer wall of the outer bearing, causing it to rotate. This, in turn, causes the second fixed plate to drive the detector to rotate synchronously via the second slot. During this rotation, the detector detects the degree of cracking in the bearing holes on the outer and inner bearings.

[0038] By adjusting the sliding engagement between the drive plate and the telescopic plate of the mechanism, the position of the detector can be dynamically adjusted according to the diameter and spacing of the bearing holes. When the bearing hole size changes, the external control device can drive the drive plate to slide within the first fixed plate, while the telescopic plate extends and retracts synchronously, so that the detector is accurately aligned with bearing holes of different diameters. In addition, the size of the detection window is adapted to the bearing hole spacing. With the adjustment structure of the threaded rod and bolt, the second fixed plate can be elastically squeezed by the buffer pad to ensure that the upper and lower surfaces of bearings of different sizes are stably clamped, thus solving the problem that traditional devices cannot adapt to bearing holes of multiple sizes due to the fixed structure.

[0039] The rubber roller in the drive mechanism, through the elastic action of the torsion spring, can adapt to outer bearings of different outer diameters. When the size of the outer bearing changes, the rubber roller is squeezed and drives the second fixed rod to rotate. The reverse elastic force of the torsion spring keeps the rubber roller in close contact with the outer wall of the bearing, avoiding detection offset caused by size differences. At the same time, the first gear and the second gear mesh with the inner bearing for transmission. The external control device can drive the gear set to rotate the entire monitoring device, so that the detector rotates synchronously along the annular array of bearing holes, realizing full circumferential detection of bearings of different diameters. This design breaks through the size limitations of traditional fixed drive structures, ensuring that the detector can stably and comprehensively capture the cracking signal of the bearing hole when multiple bearing sizes are running.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-adjusting wind turbine pitch bearing crack monitoring device, comprising an outer bearing (101), an inner bearing (102), bearing holes (103), an external control device, and a detector (2033), wherein the detector (2033) is electrically connected to the external control device, the inner bearing (102) rotates inside the outer bearing (101), and the bearing holes (103) are arranged in a ring array inside the inner bearing (102) and the outer bearing (101), characterized in that, Also includes: A first fixing plate (201) is fitted to the bottom of the inner bearing (102) and the outer bearing (101), and a first slot is provided on the outer side of the first fixing plate (201). The second fixing plate (2034) is fitted to the top of the inner bearing (102) and the outer bearing (101). A second slot is provided on the outer side of the second fixing plate (2034). The detector (2033) is installed in the second slot and detects the bearing hole (103). The traveling drive mechanism (302) is installed between the first fixed plate (201) and the second fixed plate (2034) and is located inside the inner bearing (102). It includes a drive gear that meshes with the inner tooth surface of the inner bearing (102). The drive gear is electrically connected to an external control device. The traveling clamping mechanism (303) is installed between the first fixed plate (201) and the second fixed plate (2034) and is located on the outside of the outer bearing (101). It includes a torsion spring (3032) and a rubber roller (3035) that is elastically clamped on the outer circular surface of the outer bearing (101) by the torsion spring (3032). The rubber roller (3035) rolls on the outer circular surface of the outer bearing (101) and remains in close contact with the outer circular surface of the outer bearing (101) under the elastic drive of the torsion spring (3032). The adjustment mechanism (202) includes a drive plate (2031) installed in a first slot for radial dimension adjustment, and a telescopic plate (2032) connected between the drive plate (2031) and the detector (2033) for axial dimension adjustment, wherein the drive plate (2031) is electrically connected to an external control device.

2. The self-adjusting wind turbine pitch bearing crack monitoring device according to claim 1, characterized in that: The traveling drive mechanism includes a first fixed rod (2035), a first gear (3036), a second gear (3037), and a threaded rod (2036). The bottom end of the first fixed rod (2035) is fixed to the upper surface of the first fixed plate (201). The top end of the first fixed rod (2035) slides through the second fixed plate (2034). The threaded rod (2036) is fixedly connected to the top of the first fixed rod (2035). A bolt (2037) is installed on the threaded rod (2036) to fix the second fixed plate (2034). The first gear (3036) and the second gear (3037) are sleeved on the first fixed rod (2035) and mesh with the inner tooth surface of the inner bearing (102). The two gears roll along the inner tooth surface of the inner bearing (102) under the drive of an external control device.

3. The self-adjusting wind turbine pitch bearing crack monitoring device according to claim 2, characterized in that: The bottom end of the bolt (2037) is fixedly connected to a buffer pad (2038), and the bolt (2037) presses against the upper surface of the second fixing plate (2034) through the buffer pad (2038).

4. The self-adjusting wind turbine pitch bearing crack monitoring device according to claim 1, characterized in that: The traveling clamping mechanism includes two sets of clamping components, which are symmetrically installed on the left and right sides of the telescopic plate (2032).

5. The self-adjusting wind turbine pitch bearing crack monitoring device according to claim 4, characterized in that: The clamping assembly includes a fixing block (301), a second fixing rod (3031), a torsion spring (3032), a support plate (3033), a circular groove plate (3034), and a rubber roller (3035). The fixing block (301) has two parts, upper and lower, which are respectively fixed on the top surface of the drive plate (2031) and the side surface of the telescopic plate (2032). The second fixing rod (3031) is located between the upper and lower fixing blocks (301). The torsion spring (3032) is sleeved on both ends of the second fixing rod (3031), and both ends of the torsion spring (3032) are fixedly connected to the second fixing rod (3031) and the fixing block (301) respectively. One end of the support plate (3033) is fixedly connected to the second fixing rod (3031), and the other end of the support plate (3033) is fixedly connected to the circular groove plate (3034). The rubber roller (3035) is installed inside the circular groove plate (3034) and can roll.

6. The self-adjusting wind turbine pitch bearing crack monitoring device according to claim 1, characterized in that: The bottom surface of the second fixing plate (2034) is provided with a detection window (2039) that communicates with the second slot. The detection window (2039) corresponds to the position of the bearing hole (103). The detector (2033) detects the bearing hole (103) through the detection window.

7. The self-adjusting wind turbine pitch bearing crack monitoring device according to claim 1, characterized in that: The drive plate (2031) is installed in the first slot and can slide in the first slot under the drive of an external control device. When the drive plate (2031) slides, it drives the detector (2033) to slide synchronously through the telescopic plate (2032) to adjust the radial dimension.

8. The self-adjusting wind turbine pitch bearing crack monitoring device according to claim 1, characterized in that: The telescopic plate (2032) is an elastic telescopic plate with an elastic tension spring inside. Under the action of the elastic tension spring, the detector (2033) and the second fixing plate (2034) are always attached to the upper surface of the outer bearing (101) and the inner bearing (102).

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