Wind power blade vibration monitoring device

Abstract

The utility model relates to the technical field of wind power blade monitoring, and discloses a wind power blade vibration monitoring device, which comprises a touch mechanism, the touch mechanism comprises a mounting seat, the right side of the mounting seat is in threaded connection with a connecting seat, the interior of the connecting seat is fixedly connected with a first spring, one end of the first spring is fixedly connected with a button, and the button is fixedly connected with the right side of the mounting seat. And the surface of the button is fixedly connected with a limiting plate. When vibration acting force is applied, the button can compress the first spring, so that the button slides in the connecting base, the limiting plate slides in the limiting groove to play a limiting role, and then the touch rod is driven to penetrate through the middle of the fiber grating type sensor to touch the fiber grating type sensor so as to capture sensed vibration information. And after the rebound effect of the first spring fails, the connecting seat is rotated to be separated from the mounting seat, and then the first spring is replaced, so that the shutdown maintenance time of equipment due to spring faults is shortened, and the operation efficiency of the wind power equipment is improved.

Description

Technical Field

[0001] This application relates to the field of wind turbine blade monitoring technology, and in particular to a wind turbine blade vibration monitoring device. Background Technology

[0002] As we all know, electricity is one of the most common energy sources in modern daily life. Its environmentally friendly and efficient nature has won widespread favor. There are many ways to generate electricity, and wind power is one of the most common methods. Wind power generation uses wind to drive windmills to generate electricity. The turbine blades are an important component of the wind turbine, and monitoring the turbine blades is particularly important. The most common equipment for monitoring turbine blades is the vibration sensor. The vibration sensor is a device used in daily life to monitor the turbine blades of wind turbines, and it has been widely used in the field of wind power monitoring.

[0003] When existing wind turbine blade vibration monitoring devices are damaged, the entire device may need to be disassembled or subjected to complex operations for replacement, which increases the difficulty and cost of maintenance and leads to long downtime, affecting the normal operation of wind power equipment. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a wind turbine blade vibration monitoring device.

[0005] This application adopts the following technical solution: a wind turbine blade vibration monitoring device, including a touch mechanism, the touch mechanism including a mounting base, a connecting base threadedly connected to the right side of the mounting base, a first spring fixedly connected inside the connecting base, a button fixedly connected to one end of the first spring, a limit plate fixedly connected to the surface of the button, a limit groove formed in the inner wall of the connecting base, a touch rod fixedly connected to the left side of the button, a connecting rod fixedly connected inside the mounting base, a fiber optic grating sensor fixedly connected to one end of the connecting rod; the interior of the connecting base is slidably connected to the surface of the button, the limit plate is slidably connected to the limit groove; the surface of the touch rod is slidably connected to the interior of the mounting base, and the interior of the fiber optic grating sensor is slidably connected to the touch rod.

[0006] As a further improvement to the above solution, the touch mechanism is internally threaded with a spring mechanism, which includes a rotating bolt. A handle is fixedly connected to the left side of the rotating bolt, and a second spring is fixedly connected inside the rotating bolt. One end of the second spring is fixedly connected to a spring rod. The interior of the rotating bolt is slidably connected to the spring rod, and the right end of the spring rod is located inside the fiber optic grating sensor.

[0007] As a further improvement to the above solution, the rotating bolt is located inside the mounting base, and the surface of the rotating bolt is threadedly connected to the inner wall of the mounting base.

[0008] As a further improvement to the above solution, a handle is provided at the end of the rotating bolt away from the rebound rod, and the diameter of the handle is larger than the diameter of the rotating bolt.

[0009] As a further improvement to the above solution, the axis of the touch rod and the axis of the rebound rod are on the same straight line.

[0010] As a further improvement to the above solution, a connecting mechanism is fixedly connected to the rear end of the touch mechanism. The connecting mechanism includes a connecting plate, and a signal converter is slidably connected to the inner wall of the connecting plate.

[0011] As a further improvement to the above solution, the connecting plate is located at the rear end of the mounting base, and the connecting plate is fixedly connected to the mounting base.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] This application incorporates a touch rod. When subjected to vibration, the button compresses the first spring, causing it to slide within the connecting seat. The limiting plate slides within the limiting groove, acting as a limit, which in turn drives the touch rod to pass through the center of the fiber Bragg grating sensor. The fiber Bragg grating sensor captures the vibration information, ensuring high sensitivity to minute vibration changes in the blade, improving the accuracy of monitoring data, and providing a reliable basis for subsequent blade condition assessment.

[0014] This application incorporates a first spring and a second spring. When the first spring fails to rebound, the connecting seat can be rotated to replace it. When the second spring fails to rebound, the handle can be rotated to pull out the rotating bolt for replacement. Regardless of whether the first or second spring fails, the other spring will cause the contact rod to rebound back to its original position, ensuring continuous normal operation of the device under different conditions. This significantly improves the reliability and stability of the monitoring device, reduces the risk of monitoring interruption due to spring failure, and the replaceable design reduces maintenance difficulty and cost, minimizes downtime for equipment maintenance due to spring failure, and improves the operating efficiency of wind power equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 This is a schematic diagram of the first spring in the structure of this application;

[0018] Figure 3 This is a schematic diagram of the springback mechanism structure in this application;

[0019] Figure 4 This is a schematic diagram of the front sectional structure of this application;

[0020] Figure 5 This is a schematic diagram of the top sectional structure of this application.

[0021] Explanation of key symbols:

[0022] 1. Touch mechanism; 101. Mounting base; 102. Connecting base; 103. First spring; 104. Button; 105. Limiting plate; 106. Limiting groove; 107. Touch rod; 108. Connecting rod; 109. Fiber optic grating sensor; 2. Rebound mechanism; 201. Rotating bolt; 202. Turning handle; 203. Second spring; 204. Rebound rod; 3. Connecting mechanism; 301. Connecting plate; 302. Signal converter. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0024] Please combine Figures 1-5 The wind turbine blade vibration monitoring device of this embodiment includes a touch mechanism 1;

[0025] The touch mechanism 1 includes a mounting base 101. A connecting base 102 is threadedly connected to the right side of the mounting base 101. A first spring 103 is fixedly connected inside the connecting base 102. A button 104 is fixedly connected to one end of the first spring 103. A limit plate 105 is fixedly connected to the surface of the button 104. A limit groove 106 is formed in the inner wall of the connecting base 102. A touch rod 107 is fixedly connected to the left side of the button 104. A connecting rod 108 is fixedly connected inside the mounting base 101. A fiber Bragg grating sensor 109 is fixedly connected to one end of the connecting rod 108. The interior of the connecting base 102 is slidably connected to the surface of the button 104, and the limit plate 105 is slidably connected to the limit groove 106. The surface of the touch rod 107 is slidably connected to the interior of the mounting base 101, and the interior of the fiber Bragg grating sensor 109 is slidably connected to the touch rod 107.

[0026] Mounting base 101 is installed at the root of the wind turbine blade. Button 104 is attached to the root of the wind turbine blade. When the wind turbine blade vibrates, it will contact button 104, causing button 104 to move to the left. The touch rod 107 on the left side of button 104 moves synchronously. The touch rod 107 slides within mounting base 101. At the same time as button 104 moves to the left, it will compress the first spring 103, causing button 104 to slide within connecting base 102. Limiting plate 105 slides within limiting groove 106 to limit the movement. This allows button 104 to drive touch rod 107 to pass through the middle of fiber Bragg grating sensor 109 and touch it. Thus, fiber Bragg grating sensor 109 captures the vibration information it senses to detect the vibration of the wind turbine blade. When the vibration of the wind turbine blades disappears, it will no longer contact the button 104. At this time, the button 104 will no longer be subjected to a leftward force. Under the elastic reset action of the first spring 103, the first spring 103 will drive the button 104 to move to the right. At the same time, the button 401, along with the touch rod 107, will pass back through the middle of the fiber optic sensor 109 and return to its original position. When the rebound effect of the first spring 103 fails, since the connecting seat 102 and the mounting seat 101 are connected by screws, the connecting seat 102 can be rotated to separate it from the mounting seat 101, and then the first spring 103 can be replaced. This ensures that the device can continue to work normally, improving the reliability and stability of the monitoring device, reducing the risk of monitoring interruption due to spring failure, and the replaceable design reduces maintenance difficulty and cost, reduces the downtime for equipment maintenance due to spring failure, and improves the operating efficiency of wind power equipment.

[0027] The fiber Bragg grating sensor 109 is a fiber Bragg grating sensor that is attached or embedded in the inner wall of a hollow cylinder. When the touch rod 107 slides inside the hollow cylinder, it applies a force to the inner wall, causing deformation. This deformation is transmitted to the fiber Bragg grating, causing a change in its grating pitch (period). According to the working principle of the fiber Bragg grating, the change in grating pitch causes a shift in the Bragg wavelength of the reflected light. By detecting the change in the wavelength of the reflected light, the magnitude and direction of the force applied by the touch rod 107 can be calculated, thereby obtaining force information.

[0028] The touch mechanism 1 is internally threaded with a spring mechanism 2. The spring mechanism 2 includes a rotating bolt 201. A handle 202 is fixedly connected to the left side of the rotating bolt 201. A second spring 203 is fixedly connected inside the rotating bolt 201. A spring rod 204 is fixedly connected to one end of the second spring 203. The interior of the rotating bolt 201 is slidably connected to the spring rod 204. The right end of the spring rod 204 is located inside the fiber optic grating sensor 109.

[0029] The rotating bolt 201 is a hollow rod, facilitating the installation of the second spring 203 inside it and the sliding of the return rod 204 within the rotating bolt 201. The touch rod 107, driven by the button 104, moves and collides with the return rod 204 located inside the fiber optic sensor 109, causing the return rod 204 to move to the left. This leftward movement compresses the second spring 203, and the end of the return rod 204 near the rotating bolt 201 retracts into the rotating bolt 201. When the wind turbine blade is no longer in contact with the button 104, the touch rod 107 is no longer subjected to a leftward force, and the return rod 204 is also no longer subjected to a leftward force. At this point, under the elastic reset action of the second spring 103, the second spring 203 will slide to the right along with the return rod 204, thus sliding out of the rotating bolt 201 and exerting a rightward force on the touch rod 107, helping it return to its original position. Therefore, the combined rebound force of the first spring 103 and the second spring 203 can make the touch rod 107 and the rebound rod 204 return to their original positions quickly.

[0030] The rotating bolt 201 is located inside the mounting base 101, and the outer surface of the rotating bolt 201 is threadedly connected to the inner wall of the mounting base 101.

[0031] The rotating bolt 201 is installed inside the mounting base 101 via a threaded connection. When the second spring 203 fails to rebound, since the rotating bolt 201 is connected to the mounting base 101 by screws, the rotating bolt 201 can be rotated to separate it from the mounting base 101, and then the second spring 203 can be replaced. This ensures that the device can continue to work normally, improving the reliability and stability of the monitoring device. Due to the dual-spring design of the first spring 103 and the second spring 203, even if one spring fails to rebound, the other spring can return the touch rod 107 to its original position under the elastic reset action, thereby reducing the risk of monitoring interruption due to spring failure.

[0032] In addition, a handle is provided at the end of the rotating bolt 201 away from the spring rod 204. The diameter of the handle is larger than the diameter of the rotating bolt 201. When the rotating bolt 201 is threaded into the mounting base 101, the handle is located outside the mounting base 101, which makes it easy to operate the handle to rotate the rotating bolt 201 to separate it from the mounting base 101.

[0033] The axis of the touch rod 107 and the axis of the rebound rod 204 are on the same straight line, so that the force of the touch rod 107 can be accurately applied to the rebound rod 201, and the force of the rebound rod 201 can be accurately applied to the touch rod 107.

[0034] The rear end of the touch mechanism 1 is fixedly connected to a connecting mechanism 3, which includes a connecting plate 301. A signal converter 302 is slidably connected to the inner wall of the connecting plate 301.

[0035] The connecting plate 301 is located at the rear end of the mounting base 101, and the connecting plate 301 is fixedly connected to the mounting base 101.

[0036] The signal converter 302 is connected to the fiber Bragg grating sensor 109 to receive the information detected by the sensor and transmit it to the control device of the wind turbine blade. This control device can be located at the bottom of the wind turbine tower or at a remote work site for easy monitoring by personnel. The signal converter 302 plays a crucial role in wind turbine blade vibration monitoring; if damaged, it needs immediate replacement. Therefore, it can be quickly removed from the device for replacement by sliding the signal converter 302 out of the connecting plate 301.

[0037] The implementation principle of the wind turbine blade vibration monitoring device in this embodiment is as follows: First, the mounting base 101 is installed at the root of the wind turbine blade, and the button 104 is attached to the root of the wind turbine blade. When the wind turbine blade vibrates, it will contact the button 104, which will drive the button 104 to move to the left. The touch rod 107 on the left side of the button 104 moves synchronously. The touch rod 107 slides in the mounting base 101. At the same time as the button 104 moves to the left, it will compress the first spring 103, causing the button 104 to slide in the connecting base 102. The limiting plate 105 slides in the limiting groove 106 to play a limiting role, so that the button 104 drives the touch rod 107 to pass through the middle of the fiber optic grating sensor 109 and touch it. Thus, the fiber optic grating sensor 109 captures the vibration information it senses to detect the vibration of the wind turbine blade. Simultaneously, the leftward movement of the touch lever 107 will collide with the rebound lever 204 located inside the fiber Bragg grating sensor 109, causing the rebound lever 204 to move to the left. This movement compresses the second spring 203, and the end of the rebound lever 204 near the rotating bolt 201 will retract into the rotating bolt 201. When the wind turbine blade is no longer in contact with the button 104, the first spring 103 and the second spring 203 rebound, after which the touch lever 107 and the rebound lever 204 return to their original positions. If the first spring 103 fails to rebound, it can be replaced by rotating the connecting seat 102. If the second spring 203 fails to rebound, it can be replaced by rotating the handle to pull out the rotating bolt 201. Regardless of whether the first spring 103 or the second spring 203 fails, the other can rebound the touch rod 107 back to its original position, ensuring that the device can continue to work normally under different conditions. This greatly improves the reliability and stability of the monitoring device, reduces the risk of monitoring interruption due to spring failure, and the replaceable design reduces maintenance difficulty and cost, reduces downtime for equipment maintenance due to spring failure, and improves the operating efficiency of wind power equipment. In addition, if the signal converter 302 is damaged, it can be directly slid out through the inner wall of the connecting plate 301 for replacement.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A wind turbine blade vibration monitoring device, characterized in that, Including the touch mechanism (1); The touch mechanism (1) includes a mounting base (101), a connecting base (102) is threaded to the right side of the mounting base (101), a first spring (103) is fixedly connected inside the connecting base (102), a button (104) is fixedly connected to one end of the first spring (103), a limit plate (105) is fixedly connected to the surface of the button (104), a limit groove (106) is opened on the inner wall of the connecting base (102), a touch rod (107) is fixedly connected to the left side of the button (104), a connecting rod (108) is fixedly connected inside the mounting base (101), and a fiber optic grating sensor (109) is fixedly connected to one end of the connecting rod (108). The interior of the connecting seat (102) is slidably connected to the surface of the button (104), and the limiting plate (105) is slidably connected to the limiting groove (106); the surface of the touch rod (107) is slidably connected to the interior of the mounting seat (101), and the interior of the fiber optic sensor (109) is slidably connected to the touch rod (107).

2. The wind turbine blade vibration monitoring device as described in claim 1, characterized in that: The touch mechanism (1) is internally threaded with a spring mechanism (2). The spring mechanism (2) includes a rotating bolt (201). A handle (202) is fixedly connected to the left side of the rotating bolt (201). A second spring (203) is fixedly connected inside the rotating bolt (201). A spring rod (204) is fixedly connected to one end of the second spring (203). The interior of the rotating bolt (201) is slidably connected to the spring rod (204). The right end of the spring rod (204) is located inside the fiber optic grating sensor (109).

3. The wind turbine blade vibration monitoring device as described in claim 2, characterized in that: The rotating bolt (201) is located inside the mounting base (101), and the surface of the rotating bolt (201) is threadedly connected to the inner wall of the mounting base (101).

4. The wind turbine blade vibration monitoring device as described in claim 2, characterized in that: The rotating bolt (201) has a handle at the end away from the rebound rod (204), and the diameter of the handle is larger than the diameter of the rotating bolt (201).

5. The wind turbine blade vibration monitoring device as described in claim 2, characterized in that: The axis of the touch rod (107) is on the same straight line as the axis of the rebound rod (204).

6. The wind turbine blade vibration monitoring device as described in any one of claims 1-5, characterized in that: The rear end of the touch mechanism (1) is fixedly connected to a connecting mechanism (3), the connecting mechanism (3) includes a connecting plate (301), and a signal converter (302) is slidably connected to the inner wall of the connecting plate (301).

7. The wind turbine blade vibration monitoring device as described in claim 6, characterized in that: The connecting plate (301) is located at the rear end of the mounting base (101), and the connecting plate (301) is fixedly connected to the mounting base (101).

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