Fan blade clearance monitoring device with verification function

Abstract

The utility model relates to the technical field of fan blade clearance monitoring, and discloses a fan blade clearance monitoring device with a verification function, which comprises a monitoring box and a height control device convenient to overhaul and maintain. According to the fan blade clearance monitoring device with the verification function, an overhauling worker can directly control the sliding seat to drive the monitoring box to move downwards, so that the monitoring box moves to the position close to the ground, the monitoring equipment is overhauled and maintained by the interface from the ground, high-altitude operation is not needed, the overhauling safety and convenience are improved, and the working efficiency is improved. The deformation shape of the end position of the fan blade can be monitored in a multi-point monitoring mode, the monitoring accuracy is improved, errors are reduced, when one monitoring device breaks down, monitoring devices of other point positions can maintain normal work, then the deformation displacement distance of the fan blade can be predicted through multi-point monitoring, and the monitoring accuracy is improved. Therefore, the purpose of early warning is achieved.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade clearance monitoring technology, specifically a wind turbine blade clearance monitoring device with calibration function. Background Technology

[0002] Wind turbine blade clearance monitoring devices are key equipment used to monitor the minimum safe distance (clearance) between wind turbine blades and the tower in real time. With the increasing size of wind turbine blades and the flexibility of towers, clearance monitoring is crucial for ensuring the safe operation of the unit. The tips of wind turbine blades are usually the locations with the greatest positional displacement due to wind deformation. General monitoring equipment can only monitor the tips of the blades, resulting in poor monitoring performance and an inability to monitor the overall deformation of the blades. Furthermore, malfunctions in the tip monitoring equipment can lead to complete monitoring failure. Repairing such faults requires workers to operate at heights, which is dangerous, inefficient, and inconvenient. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a wind turbine blade clearance monitoring device with calibration function, which solves the problems of poor monitoring effect and inconvenient maintenance.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine blade clearance monitoring device with verification function, comprising a monitoring box and a height control device for easy inspection and maintenance, wherein the inner wall of the monitoring box is provided with a snap-fit ​​groove, and a monitoring device for monitoring distance is snap-fitted and installed on the inner side of the snap-fit ​​groove; a protective cover plate for sealing the top of the monitoring box is fixedly installed with bolts; a sealing plate for sealing the front opening is fixedly installed inside the front end of the monitoring box with bolts; and a height control device for adjusting the height of the monitoring box is provided at the rear end of the monitoring box.

[0007] The height control device includes a sliding seat, a limiting frame, a regulating motor, a drive screw, a drive threaded hole, and a fixed base. The sliding seat is fixedly installed at the bottom of the monitoring box and at a rearward position. The sliding seat is snapped into the inner side of the limiting frame. The regulating motor is fixedly installed at the top of the limiting frame. The top end of the drive screw is rotatably installed on the inner wall of the top of the limiting frame via a bearing. The top end of the drive screw passes through the limiting frame and is fixedly installed at the output end of the regulating motor. The bottom end of the drive screw is rotatably installed on the top of the fixed base via a bearing. The fixed base is fixedly installed on the rear inner wall of the limiting frame. The drive threaded hole is opened at the top of the sliding seat, and the drive screw passes through the sliding seat via the drive threaded hole.

[0008] Preferably, the height control device further includes a snap-fit ​​positioning ball and a snap-fit ​​positioning groove. The snap-fit ​​positioning ball is embedded in the side of the sliding seat, and the snap-fit ​​positioning groove is formed on the inner side wall of the limiting frame. The portion of the snap-fit ​​positioning ball extending to the outside of the sliding seat is snapped into the snap-fit ​​positioning groove.

[0009] Preferably, the locking and positioning balls are arranged in groups of three, and there are two groups of locking and positioning balls respectively arranged on the left and right sides of the sliding seat.

[0010] Preferably, there are several monitoring devices arranged closely inside the monitoring box.

[0011] Preferably, a fixing lug is fixedly installed on the outer side wall of the limiting frame, and a fixing clamp is fixedly installed on the outer side of the fixing lug by bolts. The limiting frame is fixedly installed to the outer side of the tower by the cooperation of the fixing lug and the fixing clamp.

[0012] Preferably, the inner wall of the fixing clamp has horizontal anti-slip texture.

[0013] Preferably, the position where the limiting frame contacts the tower surface is reinforced with adhesive.

[0014] Preferably, the monitoring device is electrically connected to the blade angle adjustment device of the wind turbine.

[0015] Compared with the prior art, this utility model provides a wind turbine blade clearance monitoring device with calibration function, which has the following beneficial effects:

[0016] 1. This wind turbine blade clearance monitoring device with calibration function can adjust the height of the sliding seat by controlling the control motor to drive the drive screw. This allows maintenance personnel to directly control the sliding seat to move the monitoring box downwards to a position close to the ground during maintenance. This enables the interface to be inspected and maintained from the ground, eliminating the need for high-altitude operations and improving the safety and convenience of maintenance.

[0017] 2. This wind turbine blade clearance monitoring device with calibration function monitors the offset position of the rotating wind turbine blades at multiple points through the cooperation of multiple monitoring devices. By monitoring at multiple points, the deformation shape at the tip of the wind turbine blades can be monitored, which improves the accuracy of monitoring, reduces errors, and when one monitoring device fails, the monitoring devices at other points can continue to operate normally. Then, by monitoring at multiple points, the deformation displacement distance of the wind turbine blades can be predicted, thereby achieving the purpose of early warning. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 3 This is a schematic diagram of the fixing clamp structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the outer structure of the sliding seat of this utility model;

[0022] Figure 5 This is a schematic diagram showing the contact between the monitoring rays emitted by the internal detection equipment of the monitoring box of this utility model and the fan blades.

[0023] The components include: 1. Monitoring box; 2. Protective cover; 3. Snap-fit ​​groove; 4. Monitoring equipment; 5. Sealing plate; 6. Sliding seat; 7. Snap-fit ​​positioning ball; 8. Limiting frame; 9. Snap-fit ​​positioning groove; 10. Control motor; 11. Drive screw; 12. Drive threaded hole; 13. Fixed ear seat; 14. Fixed clamp; 15. Fixed base. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4This utility model provides a wind turbine blade clearance monitoring device with calibration function, including a monitoring box 1 and a height control device for easy inspection and maintenance. The inner wall of the monitoring box 1 is provided with a snap-fit ​​groove 3, and a monitoring device 4 for monitoring distance is snap-fitted and installed on the inner side of the snap-fit ​​groove 3. A protective cover plate 2 for sealing the top of the monitoring box 1 is fixedly installed with bolts. A sealing plate 5 for sealing the front opening is fixedly installed with bolts inside the front end of the monitoring box 1. A rearwardly inclined opening is provided at the bottom of the monitoring box 1 and below the sealing plate 5 to prevent water accumulation at the front end of the monitoring box 1. A height control device for adjusting the height of the monitoring box 1 is provided at the rear end of the monitoring box 1.

[0026] The height control device includes a sliding seat 6, a limiting frame 8, a regulating motor 10, a drive screw 11, a drive threaded hole 12, and a fixed base 15. The sliding seat 6 is fixedly installed at the bottom of the monitoring box 1 and at a rearward position. The sliding seat 6 is snapped into the inner side of the limiting frame 8. The bottom of the limiting frame 8 has a notch to prevent water accumulation inside. The regulating motor 10 is fixedly installed at the top of the limiting frame 8. The top end of the drive screw 11 is rotatably installed on the inner wall of the top of the limiting frame 8 through a bearing. The top end of the drive screw 11 passes through the limiting frame 8 and is fixedly installed at the output end of the regulating motor 10. The bottom end of the drive screw 11 is rotatably installed on the top of the fixed base 15 through a bearing. The fixed base 15 is fixedly installed on the inner wall of the rear side of the limiting frame 8. The drive threaded hole 12 is opened at the top of the sliding seat 6, and the drive screw 11 passes through the sliding seat 6 through the drive threaded hole 12.

[0027] Furthermore, the height control device also includes a snap-fit ​​positioning ball 7 and a snap-fit ​​positioning groove 9. The snap-fit ​​positioning ball 7 is embedded in the side of the sliding seat 6, and the snap-fit ​​positioning groove 9 is opened on the inner side wall of the limiting frame 8. The part of the snap-fit ​​positioning ball 7 that extends to the outside of the sliding seat 6 is snapped into the snap-fit ​​positioning groove 9. Through the cooperation of the snap-fit ​​positioning ball 7 and the snap-fit ​​positioning groove 9, the sliding seat 6 is slidably snapped into the inside of the limiting frame 8.

[0028] Furthermore, the locking and positioning balls 7 are arranged in groups of three, with two groups of locking and positioning balls 7 respectively located on the left and right sides of the sliding seat 6. By having multiple locking and positioning balls 7 arranged longitudinally and locked into the locking and positioning groove 9, the stability of the sliding seat 6 locked inside the limiting frame 8 is improved. When the sliding seat 6 moves, the locking and positioning balls 7 roll along the inside of the locking and positioning groove 9, reducing the friction of the sliding seat 6 during movement and improving the stability of movement.

[0029] Further details are attached. Figure 5As shown, there are several monitoring devices 4 arranged closely inside the monitoring box 1. The monitoring devices 4 monitor upwards, measuring the height traveled by the wind turbine blades as they rotate in the current vertical plane. By monitoring multiple devices 4 simultaneously, the distance data of multiple wind turbine blades monitored at different distances can be summarized to obtain the specific deformation shape of the wind turbine blades. When one monitoring device 4 fails, the approximate distance of the missing monitoring point can be obtained through other data, thus not affecting the normal monitoring function of the monitoring devices. During maintenance, the faulty monitoring device 4 can be replaced individually. The modular installation facilitates maintenance.

[0030] Furthermore, a fixing lug 13 is fixedly installed on the outer wall of the limiting frame 8. A fixing clamp 14 is fixedly installed on the outer side of the fixing lug 13 by bolts. The limiting frame 8 is fixedly installed to the outer side of the tower by the cooperation of the fixing lug 13 and the fixing clamp 14. The length of the fixing clamp 14 is selected according to the diameter of the tower at the specific installation height. The limiting frame 8 is fixed to the outer side of the tower by the cooperation of the fixing lug 13 and the fixing clamp 14.

[0031] Furthermore, the inner wall of the fixing clamp 14 is provided with horizontal anti-slip texture, which improves the locking effect of the fixing clamp 14 when it is clamped on the outside of the tower and prevents slippage.

[0032] Furthermore, the contact point between the limiting frame 8 and the tower surface is reinforced with adhesive to reduce resonance caused by wind blowing the limiting frame 8, thereby improving the stability of the connection between the limiting frame 8 and the tower.

[0033] Furthermore, the monitoring device 4 is electrically connected to the blade angle adjustment device of the wind turbine. When the monitoring device 4 detects that the distance between the wind turbine blade and the tower is too close, the blade angle adjustment device will deflect the angle. By adjusting the deflection angle, the wind resistance is reduced, thereby reducing the deformation of the wind turbine blade. When the wind force is too strong, the wind turbine will be automatically controlled to stop working, thus improving the safety of use.

[0034] In use, the fixing clamp 14 is fitted onto the outside of the tower, and the fixing clamp 14 and the fixing lug 13 are fixedly connected with bolts. The limiting frame 8 is then fixedly installed on the outer surface of the tower. Glue is then applied to the contact point between the limiting frame 8 and the tower for secondary reinforcement, improving installation stability and preventing resonance. During monitoring, a row of installed monitoring devices 4 detects the distance between the fan blades and the monitoring box 1 at different distances as the fan blades pass overhead. The signal measured at the closest point to the tower is the shortest distance between the tip of the fan blade and the tower. Furthermore, by organizing the signals detected by multiple monitoring devices 4, the deformation shape at the end of the fan blades can be obtained, further improving the monitoring effect. When maintenance is required, the control motor 10 is rotated, and the control motor 10 drives the drive screw 11 to rotate. The drive screw 11 and the drive threaded hole 12 drive the sliding seat 6 to move downward along the inside of the limiting frame 8 through the threaded engagement. The limiting frame 8 slides downward under the restriction of the locking positioning ball 7 and the locking positioning groove 9, thereby driving the monitoring box 1 to move downward to a position close to the ground through the sliding seat 6, thus facilitating maintenance work directly on the ground.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fan blade clearance monitoring device with checking function, comprising a monitoring box (1) and a height control device for facilitating maintenance and repair, characterized in that: The monitoring box (1) has a snap-fit ​​groove (3) on its inner wall. A monitoring device (4) for monitoring distance is snap-fitted onto the inner side of the snap-fit ​​groove (3). A protective cover plate (2) for sealing the top of the monitoring box (1) is fixedly installed with bolts. A sealing plate (5) for sealing the front opening is fixedly installed with bolts inside the front end of the monitoring box (1). A height control device for adjusting the height of the monitoring box (1) is provided at the rear end of the monitoring box (1). The height control device includes a sliding seat (6), a limiting frame (8), a regulating motor (10), a drive screw (11), a drive threaded hole (12), and a fixed base (15). The sliding seat (6) is fixedly installed at the bottom of the monitoring box (1) and at the rear side. The sliding seat (6) is snapped into the inner side of the limiting frame (8). The regulating motor (10) is fixedly installed at the top of the limiting frame (8). The top end of the drive screw (11) is rotatably installed on the top inner wall of the limiting frame (8) through a bearing. The top end of the drive screw (11) passes through the limiting frame (8) and is fixedly installed at the output end of the regulating motor (10). The bottom end of the drive screw (11) is rotatably installed on the top of the fixed base (15) through a bearing. The fixed base (15) is fixedly installed on the rear inner wall of the limiting frame (8). The drive threaded hole (12) is opened at the top of the sliding seat (6). The drive screw (11) passes through the sliding seat (6) through the drive threaded hole (12).

2. The fan blade clearance monitoring device with a check function according to claim 1, characterized in that: The height control device also includes a snap-fit ​​positioning ball (7) and a snap-fit ​​positioning groove (9). The snap-fit ​​positioning ball (7) is embedded in the side of the sliding seat (6), and the snap-fit ​​positioning groove (9) is opened on the inner side wall of the limiting frame (8). The part of the snap-fit ​​positioning ball (7) that extends to the outside of the sliding seat (6) is snapped into the snap-fit ​​positioning groove (9).

3. The wind turbine blade clearance monitoring device with calibration function according to claim 2, characterized in that: The snap-fit ​​positioning balls (7) are arranged in groups of three, and there are two groups of snap-fit ​​positioning balls (7) respectively arranged on the left and right sides of the sliding seat (6).

4. The wind turbine blade clearance monitoring device with calibration function according to claim 1, characterized in that: There are several monitoring devices (4) arranged closely inside the monitoring box (1).

5. A wind turbine blade clearance monitoring device with calibration function according to claim 1, characterized in that: The outer side wall of the limiting frame (8) is fixedly installed with a fixing lug (13), and a fixing clamp (14) is fixedly installed on the outer side of the fixing lug (13) by bolts. The limiting frame (8) is fixedly installed to the outer side of the tower by the cooperation of the fixing lug (13) and the fixing clamp (14).

6. A wind turbine blade clearance monitoring device with calibration function according to claim 5, characterized in that: The inner wall of the fixing clamp (14) is provided with horizontal anti-slip texture.

7. A wind turbine blade clearance monitoring device with calibration function according to claim 5, characterized in that: The position where the limiting frame (8) contacts the tower surface is reinforced with glue.

8. A wind turbine blade clearance monitoring device with calibration function according to claim 1, characterized in that: The monitoring device (4) is electrically connected to the blade angle adjustment device of the wind turbine.

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