Fan blade root crack detection device

Abstract

The utility model belongs to the technical field of fan detection equipment, and particularly discloses a fan blade root crack detection device which comprises a box body, a plurality of mechanical arms are fixedly connected to the two sides of the bottom of the box body, vacuum suction cups are fixedly connected to the bottoms of the mechanical arms, and one side face of the box body is rotationally connected with a T-shaped frame through a cross-shaped sliding table. The two ends of the T-shaped frame are fixedly connected with a brush and a cotton ball respectively, a telescopic cylinder is fixedly connected to the T-shaped frame, the output end of the telescopic cylinder is fixedly connected with an ultrasonic detector, a liquid storage box, a storage battery and a control box are fixedly connected into the box body, a feeding port is formed in the top of the liquid storage box, and a spray head is fixedly connected to one side of the liquid storage box through a pipeline. According to the blade cleaning device, the surface of a blade can be cleaned through the brush and the cotton ball, cleaning liquid can be sprayed out through the liquid storage box and the spray head, the cleaning effect is improved, it can be guaranteed that the cleaning liquid is completely absorbed through the rotatable T-shaped frame, and the detection result is prevented from being affected.

Description

Technical Field

[0001] This utility model belongs to the technical field of wind turbine testing equipment, specifically a device for detecting root cracks in wind turbine blades. Background Technology

[0002] The root of a wind turbine, as a critical load-bearing component connecting to the hub, is subjected to alternating loads, environmental corrosion, and extreme weather impacts over long periods. This makes it prone to fatigue cracks between composite material layers or around bolt holes. Therefore, regular cleaning and inspection are crucial for ensuring the safe operation of wind turbines. Especially during routine monitoring, timely detection of cracks at the blade root can significantly prevent accidents. However, existing blade root flaw detection devices simply adhere to the blade and are inspected by a flaw detector. Outdoor wind turbine blades are exposed to wind and sun year-round, accumulating bird droppings and dirt, which can affect the detection accuracy and make it difficult to detect minute cracks, posing a safety hazard. Therefore, a device is needed that can clean dirt and impurities from wind turbine blades during crack detection. Utility Model Content

[0003] To address the above technical problems, this utility model provides a device that can clean dirt and impurities from wind turbine blades during crack detection, thus solving the problem that existing flaw detection devices cannot remove impurities from the blade surface.

[0004] To solve the above technical problems, the technical solution of this utility model is as follows: a wind turbine blade root crack detection device, comprising a housing, several robotic arms fixedly connected to both sides of the bottom of the housing, a vacuum suction cup fixedly connected to the bottom of each robotic arm, a cross slide fixedly connected to one side of the housing, a rotary box fixedly connected to the cross slide, a T-shaped frame rotatably connected to one side of the rotary box, a brush and a cotton ball fixedly connected to both ends of the T-shaped frame respectively, each brush and cotton ball being driven by two identical servo motors, a telescopic cylinder fixedly connected to the T-shaped frame, an ultrasonic detector fixedly connected to the output end of the telescopic cylinder, a worm gear and a worm rotatably connected inside the rotary box, the worm being driven by a rotary motor, the worm gear meshing with the worm, a liquid storage tank, a battery, and a control box fixedly connected inside the housing, an inlet opening at the top of the liquid storage tank, a nozzle fixedly connected to one side via a pipe, the nozzle being located on the downward side of the T-shaped frame, a water pump fixedly connected to the pipe, and a camera fixedly connected to the top of the housing via a bracket.

[0005] Furthermore, the cross slide includes a first lead screw, which is rotatably connected to the side of the housing. A slide is threaded onto the first lead screw, and a second lead screw is rotatably connected to the slide. A rotary box is threaded onto the second lead screw. Guide rails are fixedly connected to both sides of the first lead screw and the second lead screw. The rotary box and the slide are slidably connected to the guide rails. The first lead screw is driven by a first motor, and the second lead screw is driven by a second motor.

[0006] Furthermore, a robotic arm is rotatably connected to the bottom of the box via a base plate. The robotic arm consists of a first joint, a second joint, and a third joint. The first joint is rotatably connected to the base plate, the first joint is rotatably connected to the second joint, the second joint is rotatably connected to the third joint, and a vacuum suction cup is fixedly connected to the bottom of the third joint.

[0007] Furthermore, the control box is equipped with a controller and wireless sensors, and the telescopic cylinder, water pump, first motor, second motor, rotary motor and servo motor are all controlled by the controller.

[0008] This utility model has the following advantages compared with the prior art:

[0009] 1. This utility model, by incorporating a rotatable brush and cotton balls, can clean impurities and stains from the surface of blades. The inclusion of a liquid storage tank and spray nozzle allows for the application of cleaning agent to the blades, followed by brush cleaning, thus significantly improving the cleaning effect and accuracy of subsequent inspections. The inclusion of a retractable ultrasonic detector enables flaw detection after cleaning, with clearly defined steps. The inclusion of a cross slide allows for the vertical and horizontal movement of the control device's front end, increasing the cleaning range. The inclusion of a robotic arm and vacuum suction cup allows the device to adhere to the blades and move freely.

[0010] 2. This utility model enables the rotation of the T-shaped frame by setting a worm gear, sprays the cleaning solution in the storage tank by setting a water pump, monitors the scene in real time by setting a camera, facilitates remote control for cleaning and inspection, and controls the entire device by setting a control box, thereby improving the degree of automation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is the left view of the present invention.

[0013] Figure 3 This is a schematic diagram of the cross slide of this utility model.

[0014] In the diagram: 1. Box body, 2. Robotic arm, 3. Camera, 4. T-shaped frame, 5. Brush, 6. Cotton ball, 7. Telescopic cylinder, 8. Ultrasonic detector, 9. Feed inlet, 10. Worm gear, 11. Worm, 12. Slide table, 13. Nozzle, 14. Second lead screw, 15. Rotary box, 16. Vacuum suction cup, 17. Guide rail, 18. Liquid storage tank, 19. Battery, 20. Control box, 21. Water pump, 22. Rotary motor, 23. First motor, 24. First lead screw, 25. Second motor. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figures 1 to 3The device for detecting root cracks in wind turbine blades includes a housing 1. Several robotic arms 2 are fixedly connected to both sides of the bottom of the housing 1. The robotic arms 2 are controlled by a controller 201. To ensure that the device adheres to the blade, a vacuum suction cup 16 is fixedly connected to the bottom of the robotic arm 2. The vacuum suction cup 16 is also controlled by the controller 201. A vacuum generator is installed on the vacuum suction cup 16. To enable the front end of the device to move up, down, left, and right, a cross slide is fixedly connected to one side of the housing 1. To allow the T-shaped frame 4 to change direction, a rotary box 15 is fixedly connected to the cross slide. One side of the rotary box 15 is threadedly connected to a second lead screw 14, and the other side is connected via a rotary mechanism. The rotary table is fixedly connected to the T-shaped frame 4, and the rotary table is fixedly connected to the turbine 10. The T-shaped frame 4 is rotatably connected to one side of the rotary box 15. In order to clean impurities and dirt on the blade surface, a brush 5 and a cotton ball 6 are fixedly connected to both ends of the T-shaped frame 4, respectively. The brush 5 is used to brush the impurities, and the cotton ball 6 absorbs the cleaning liquid on the blade to prevent the cleaning liquid from corroding the blade and causing danger. The brush 5 and the cotton ball 6 are each driven by two identical servo motors. Each servo motor is individually controlled by the controller 201 and powered by the battery 19. A telescopic cylinder 7 is fixedly connected to the T-shaped frame 4. An ultrasonic detector 8 is fixedly connected to the output end of the telescopic cylinder 7. The ultrasonic detector 8 is controlled by the extension and retraction of the telescopic cylinder 7. The ultrasonic detector 8 is controlled by the controller 201 and can be remotely controlled. To rotate the T-shaped frame 4, a worm gear 10 and a worm 11 are rotatably connected inside the rotary box 15. The worm 11 is driven by the rotary motor 22, and the worm gear 10 meshes with the worm 11 for transmission. The rotary motor 22 drives the worm 11 to rotate, thereby rotating the T-shaped frame. To store the cleaning fluid, a storage tank 18 is fixedly connected inside the box 1. To provide power to the device, a storage battery 19 is fixedly connected to the bottom inside the box 1. For remote control, a control box 20 is installed at the top inside the box 1. Pool 19 supplies power to control box 20. To facilitate the addition of cleaning fluid, an inlet 9 is provided on the top of the storage tank 18. A nozzle 13 is fixedly connected to one side of the storage tank 18 via a pipe. A pipe is fixedly connected to one side of the storage tank 18, and a nozzle 13 is fixedly connected to the output end of the pipe. The nozzle 13 is located on the downward side of the T-shaped frame 4. To facilitate the spraying of cleaning fluid, a water pump 21 is fixedly connected to the pipe. To enable remote observation of the site, a camera 3 is fixedly connected to the top of the box 1 via a bracket. The camera 3 is an all-around camera with no blind spots. At the same time, the camera 3 is controlled by the controller 201, and the image of the camera 3 is transmitted to the back-end terminal through the wireless sensor 202 inside the control box 20.

[0017] To enable the device to move vertically, the cross slide includes a first lead screw 24, which is rotatably connected to the side of the housing 1. A slide 12 is threadedly connected to the first lead screw 24 via a first threaded block, and the first threaded block is fixedly connected to the slide 12. The slide 12 moves vertically. To enable the device to move left and right, a second lead screw 14 is rotatably connected to the slide 12. A rotary box 15 is threadedly connected to the second lead screw 14 via a second threaded block, and the second threaded block is fixedly connected to the rotary box 15. To maintain the stability of the slide 12 and the rotary box 15 during movement, guide rails 17 are fixedly connected to both sides of the first lead screw 24 and the second lead screw 14. The two guide rails 17 are arranged in parallel, and the guide rails 17 are slidably connected to the slide 12 and the rotary box 15 respectively via sliding saddles. The first lead screw 24 is driven by a first motor 23, and the second lead screw 14 is driven by a second motor 25. The first motor 23 is fixedly connected to the top of the housing 1, and the second motor 25 is fixedly connected to the rotary box 15.

[0018] In order to allow the device to be attached to the blade and move around, a robotic arm 2 is rotatably connected to the bottom of the housing 1 via a base plate. The robotic arm 2 is divided into a first joint, a second joint, and a third joint. The first joint is rotatably connected to the base plate, the first joint is rotatably connected to the second joint, the second joint is rotatably connected to the third joint, and a vacuum suction cup 16 is fixedly connected to the bottom of the third joint. Each joint is controlled by a separate micro motor, which is controlled by a controller.

[0019] It should be noted that the robotic arm in this utility model is an existing mechanism, and its motion details and transmission components will not be described in detail here. Different robotic arms can be selected according to different situations during specific use.

[0020] In order to enable remote control of the device, a controller 201 and a wireless sensor 202 are installed in the control box 20. The controller 201 controls the entire device, and the wireless sensor 202 transmits the real-time signal of the device to the back-end terminal for remote control. The telescopic cylinder 7, water pump 21, first motor 23, second motor 25, rotary motor 22, and servo motor are all controlled by the controller 201.

[0021] The specific working process of this utility model is as follows:

[0022] When performing flaw detection on wind turbine blades, the device is first placed on the blade. Personnel move the device by controlling the robotic arm 2, and the camera 3 monitors it in real time. When stains are found on the blade, the first motor 23 is controlled to lower the cross slide. At this time, the brush 5 contacts the dirty area of ​​the blade, and the servo motor driving the brush 5 is turned on to clean it. At the same time, the water pump 21 is turned on to spray the cleaning fluid from the nozzle 13 to improve the cleaning efficiency. After the brush 5 finishes cleaning, the rotary motor 22 is started to control the T-shaped frame to rotate, so that the brush 5 and the cotton ball 6 are reversed. At this time, the cotton ball 6 contacts the cleaned area, and the servo motor driving the cotton ball 6 is turned on to absorb the cleaning fluid from the cleaned area. After the blade surface is clean, the cross slide is raised, and the telescopic cylinder 8 is driven to extend. At this time, the ultrasonic detector 8 contacts the blade below to perform flaw detection. Each robotic arm 2 is controlled independently, and each micro motor is controlled independently for movement. By following the above steps to clean the wind turbine blades during flaw detection, the dirty areas of the blades can be effectively cleaned, improving the accuracy of the detection.

Claims

1. A device for detecting root cracks in wind turbine blades, comprising a housing (1), wherein a plurality of robotic arms (2) are fixedly connected to both sides of the bottom of the housing (1), and a vacuum suction cup (16) is fixedly connected to the bottom of each robotic arm (2), characterized in that: A cross slide is fixedly connected to one side of the housing (1), and a rotary box (15) is fixedly connected to the cross slide. A T-shaped frame (4) is rotatably connected to one side of the rotary box (15). A brush (5) and a cotton ball (6) are fixedly connected to both ends of the T-shaped frame (4). The brush (5) and the cotton ball (6) are each driven by two identical servo motors. A telescopic cylinder (7) is fixedly connected to the T-shaped frame (4). An ultrasonic detector (8) is fixedly connected to the output end of the telescopic cylinder (7). A worm gear (10) and a worm wheel are rotatably connected inside the rotary box (15). The rod (11) is driven by a rotary motor (22). The worm gear (10) meshes with the worm gear (11) for transmission. The housing (1) is fixedly connected to a liquid storage tank (18), a battery (19), and a control box (20). The liquid storage tank (18) has an inlet (9) on its top and a nozzle (13) fixedly connected to one side via a pipe. The nozzle (13) is located on the downward side of the T-shaped frame (4). A water pump (21) is fixedly connected to the pipe. A camera (3) is fixedly connected to the top of the housing (1) via a bracket.

2. The wind turbine blade root crack detection device according to claim 1, characterized in that: The cross slide includes a first lead screw (24), which is rotatably connected to the side of the housing (1). A slide (12) is threaded onto the first lead screw (24). A second lead screw (14) is rotatably connected onto the slide (12). A rotary box (15) is threaded onto the second lead screw (14). Guide rails (17) are fixedly connected to both sides of the first lead screw (24) and the second lead screw (14). The rotary box (15) and the slide (12) are slidably connected to the guide rails (17). The first lead screw (24) is driven by a first motor (23), and the second lead screw (14) is driven by a second motor (25).

3. The wind turbine blade root crack detection device according to claim 1, characterized in that: The bottom of the box (1) is rotatably connected to a mechanical arm (2) via a base plate. The mechanical arm (2) is divided into a first joint, a second joint, and a third joint. The first joint is rotatably connected to the base plate, the first joint is rotatably connected to the second joint, the second joint is rotatably connected to the third joint, and a vacuum suction cup (16) is fixedly connected to the bottom of the third joint.

4. The wind turbine blade root crack detection device according to claim 2, characterized in that: The control box (20) is equipped with a controller (201) and a wireless sensor (202). The telescopic cylinder (7), water pump (21), first motor (23), second motor (25), rotary motor (22), and servo motor are all controlled by the controller (201).

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