Wind turbine blade strength detection device

Abstract

The utility model discloses a wind turbine blade strength detection device, which comprises two transverse plates, the outer walls of the two transverse plates are both provided with extension devices, a driving unit is arranged above one adjusting plate, each extension device comprises two adjusting plates, the adjusting plates are arranged on the two sides of the adjusting plate, and the adjusting plates are arranged on the two sides of the adjusting plate. The two sides of the outer wall of the transverse plate are sleeved with the two sliding blocks respectively; the fixing bolt is in threaded connection with the inner wall of the adjusting plate and abuts against the outer wall of the transverse plate; and the arc-shaped plate is fixedly connected to the surface of the adjusting plate. The utility model relates to the technical field of wind turbine blade strength detection, through the cooperation among adjusting plates, fixing bolts and arc-shaped plates, when a detection device needs to be installed at different positions of a blade, the adjusting plates at the two sides of the outer wall of a transverse plate are adjusted to be just attached to the outer wall of the blade; and then the positions of the adjusting plate and the transverse plate are fixed through the fixing bolts, and after fixation, each position of the blade has radian.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade strength testing technology, specifically a wind turbine blade strength testing device. Background Technology

[0002] A wind turbine is a type of turbine that uses wind energy as its power source. An aerospace research institute in Wilbraham, Massachusetts, has developed a wind turbine that generates electricity at half the cost of a conventional turbine.

[0003] The existing wind turbine blade strength testing device first fixes the manufactured blade, and then uses the testing device to make the blade float up and down. Personnel observe whether cracks or deformations appear on the blade surface after multiple floats to test the blade strength.

[0004] However, existing wind turbine blade strength testing devices require fixing the testing device to the surface of the blade to drive the blade to move up and down when the blade is moved up and down. But when the testing device is installed on the blade, it is not suitable for different positions of the blade because the size of the blade is different. Therefore, it is necessary to manufacture it separately. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a wind turbine blade strength testing device, which solves the problem that when testing the blade's up-and-down movement, the device needs to be fixed to the blade's surface to drive the blade's up-and-down movement. However, when the testing device is installed on the blade, the size of the device varies at different positions on the blade, making it unsuitable for different positions and requiring additional manufacturing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine blade strength testing device, comprising two horizontal plates, each with an extension device on its outer wall, and a driving unit above an adjusting plate. Each extension device includes: two adjusting plates, each sleeved on both sides of the outer wall of the horizontal plate; a fixing bolt threaded to the inner wall of the adjusting plate and pressed against the outer wall of the horizontal plate; an arc-shaped plate fixedly connected to the surface of the adjusting plate; a rubber pad fixedly connected to the surface of the arc-shaped plate; and a clamping part positioned above the adjusting plate. By adjusting the positions of the two adjusting plates on the outer wall of the horizontal plates, different blade positions are accommodated. The fixing bolts secure the adjusting plates and the horizontal plates. The clamping part clamps and secures the blades. The arc-shaped plate and rubber pad adapt the curvature of the blades.

[0007] Preferably, a support pad is fixedly connected to the surface of the cross plate.

[0008] Preferably, the clamping part includes: a screw, fixedly connected to the top of one of the adjusting plates and passing through the top of the other adjusting plate; a first nut, threadedly connected to the outer wall of the screw; a washer, fitted onto the outer wall of the screw; and a second nut, threadedly connected to the outer wall of the first nut on one side near the adjusting plate and threadedly connected to the outer wall of the screw on the other side. The screw and the first nut fix the two adjusting plates, the second nut prevents the first nut from loosening, and the washer increases the friction between the first nut and the adjusting plate.

[0009] Preferably, the drive unit includes: a geared motor, fixedly connected to the top of the horizontal plate located above; a straight plate, fixedly connected to the output end of the geared motor; a counterweight, sleeved on the outer wall of the straight plate; and a fixing mechanism disposed below the counterweight; wherein the output end of the geared motor drives the straight plate and the counterweight to rotate, causing the blades to float up and down, and the fixing mechanism fixes the straight plate and the counterweight.

[0010] Preferably, the fixing mechanism includes: a plurality of fixing grooves, all formed on the surface of the straight plate; a fixing rod rotatably connected to the bottom of the counterweight by a pin; and a torsion spring installed between the straight plate and the counterweight; wherein the fixing grooves and the fixing rod fix the counterweight and the straight plate, and the torsion spring provides a force to the fixing rod as it approaches the fixing groove.

[0011] Beneficial effects

[0012] This utility model provides a wind turbine blade strength testing device. It has the following advantages: Through the cooperation of an adjusting plate, fixing bolts, and an arc-shaped plate, when the testing device needs to be installed at different positions on the blade, firstly, the adjusting plates on both sides of the outer wall of the horizontal plate are adjusted to fit precisely against the outer wall of the blade. Then, the adjusting plate and the horizontal plate are fixed in position using the fixing bolts. After fixing, because each position of the blade has a curvature, the rubber pad and the arc-shaped plate can perfectly match the curvature of the blade, allowing for better blade fixation. It is suitable for installation at different positions on the blade.

[0013] By coordinating the fixed groove, the fixed rod, and the torsion spring, the up-and-down movement of the blades can be adjusted by changing the position of the counterweight on the surface of the plate. The closer the counterweight is to the geared motor, the smaller the movement, and vice versa. After the position of the counterweight is changed, the counterweight is fixed by snapping the fixed rod into the inner wall of the fixed groove, and the torsion spring restricts the movement of the fixed rod. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 A structural diagram of the straight plate, counterweight, and fixing groove;

[0016] Figure 3 for Figure 2 A structural diagram of the central fixing rod, fixing groove, and straight plate;

[0017] Figure 4 for Figure 1 A schematic diagram of the structure of the middle screw, the first nut, and the second nut.

[0018] In the diagram: 1. Horizontal plate; 11. Support pad; 2. Extension device; 21. Adjusting plate; 22. Fixing bolt; 23. Arc plate; 24. Rubber pad; 25. Clamping part; 251. Screw; 252. First nut; 253. Washer; 254. Second nut; 3. Drive unit; 31. Gear motor; 32. Straight plate; 33. Counterweight; 34. Fixing mechanism; 341. Fixing groove; 342. Fixing rod; 343. Torsion spring. Detailed Implementation

[0019] 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.

[0020] Existing wind turbine blade strength testing devices require fixing the testing device to the surface of the blade to drive it to move up and down when the blade is moved up and down. However, when the testing device is installed on the blade, it is not suitable for different positions of the blade because the blades are of different sizes, so it needs to be manufactured separately.

[0021] In view of this, the present invention provides a wind turbine blade strength testing device. Through the cooperation between the adjusting plate, the fixing bolt and the arc plate, when the testing device needs to be installed at different positions on the blade, first adjust the adjusting plates on both sides of the outer wall of the horizontal plate to fit exactly against the outer wall of the blade. Then fix the position of the adjusting plate and the horizontal plate with the fixing bolt. After fixing, since each position of the blade has a curvature, the rubber pad and the arc plate can perfectly match the curvature of the blade, which can better fix the blade. It is suitable for installation at different positions on the blade.

[0022] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0023] Example 1: By Figure 1-4 It is known that a wind turbine blade strength testing device includes a horizontal plate 1, of which two horizontal plates 1 are provided. Each horizontal plate 1 has an extension device 2 on its outer wall. A drive unit 3 is located above an adjusting plate 21. The extension device 2 includes: two adjusting plates 21, respectively fitted onto the outer walls of the horizontal plates 1; a fixing bolt 22, threadedly connected to the inner wall of the adjusting plate 21 and pressed against the outer wall of the horizontal plate 1; an arc-shaped plate 23, fixedly connected to the surface of the adjusting plate 21; a rubber pad 24, fixedly connected to the surface of the arc-shaped plate 23; and a clamping part 25 located above the adjusting plate 21. The device adapts to different blade positions by adjusting the positions of the two adjusting plates 21 on the outer walls of the horizontal plates 1. The fixing bolt 22 fixes the adjusting plate 21 and the horizontal plate 1. The clamping part 25 clamps and fixes the blade between the upper and lower adjusting plates 21. The arc-shaped plate 23 and the rubber pad 24 adapt to the curvature of the blade.

[0024] In the specific implementation process, it is worth noting that there are two horizontal plates 1, and the two horizontal plates 1 are fitted with adjusting plates 21 on both sides of their outer walls, which are in an up-down relationship. This can fix the outer wall of the blade. When the detection device needs to be installed at different positions on the blade, first adjust the adjusting plates 21 on both sides of the outer wall of the horizontal plate 1 until they fit perfectly against the outer wall of the blade. Then fix the position of the adjusting plates 21 and the horizontal plate 1 with fixing bolts 22. After fixing, since each position of the blade has a curvature, the rubber pads 24 and the arc plate 23 can perfectly match the curvature of the blade, which can better fix the blade. This is suitable for installation at different positions on the blade.

[0025] Furthermore, a support pad 11 is fixedly connected to the surface of the horizontal plate 1;

[0026] In the specific implementation process, it is worth noting that the surface of the adjustment plate 21 is provided with openings. When the adjustment plate 21 is adjusted, the support pad 11 at the top of the horizontal plate 1 can be engaged with the inner wall of the opening, and the support pad 11 can support the position of the blade.

[0027] Furthermore, the clamping part 25 includes: a screw 251, fixedly connected to the top of one adjusting plate 21 and passing through the top of the other adjusting plate 21; a first nut 252, threadedly connected to the outer wall of the screw 251; a washer 253, sleeved on the outer wall of the screw 251; and a second nut 254, threadedly connected to the outer wall of the first nut 252 on one side near the adjusting plate 21 and threadedly connected to the outer wall of the screw 251 on the other side. The screw 251 and the first nut 252 fix the two adjusting plates 21, the second nut 254 prevents the first nut 252 from loosening, and the washer 253 increases the friction between the first nut 252 and the adjusting plate 21.

[0028] In the specific implementation process, it is worth noting that after fixing the adjusting plate 21 to the outer wall of the blade, the washer 253 is first placed on the top of the adjusting plate 21, and then the first nut 252 is tightened to the top of the washer 253. Through the action of the washer 253, the friction between the first nut 252 and the adjusting plate 21 can be increased. Then the second nut 254 is tightened to the outer wall of the first nut 252, and the upper inner wall of the second nut 254 can be threaded to the outer wall of the screw 251 to prevent the first nut 252 from loosening.

[0029] Specifically, when using this wind turbine blade strength testing device, if the testing device needs to be installed at different positions on the blade, first adjust the adjusting plates 21 on both sides of the outer wall of the horizontal plate 1 until they fit perfectly against the outer wall of the blade. Then, fix the adjusting plates 21 and the horizontal plate 1 with fixing bolts 22. After fixing, since each position of the blade has a curvature, the rubber pads 24 and the curved plate 23 can perfectly match the curvature of the blade, which can better fix the blade. It is suitable for installation at different positions on the blade. The surface of the adjusting plates 21 has openings. When adjusting the adjusting plates 21... When the blade is adjusted, the support pad 11 at the top of the horizontal plate 1 can be snapped onto the inner wall of the opening. The support pad 11 can support the position of the blade. After the adjusting plate 21 is fixed to the outer wall of the blade, the washer 253 is first placed on the top of the adjusting plate 21, and then the first nut 252 is tightened to the top of the washer 253. Through the action of the washer 253, the friction between the first nut 252 and the adjusting plate 21 can be increased. Then the second nut 254 is tightened to the outer wall of the first nut 252, and the upper inner wall of the second nut 254 can be threaded to the outer wall of the screw 251 to prevent the first nut 252 from loosening.

[0030] Example 2: From Figure 1-4 It is known that the drive unit 3 includes: a geared motor 31, which is fixedly connected to the top of the horizontal plate 1 located above; a straight plate 32, which is fixedly connected to the output end of the geared motor 31; a counterweight 33, which is sleeved on the outer wall of the straight plate 32; and a fixing mechanism 34, which is located below the counterweight 33. The output end of the geared motor 31 drives the straight plate 32 and the counterweight 33 to rotate, thereby causing the blades to float up and down. The fixing mechanism 34 fixes the straight plate 32 and the counterweight 33.

[0031] In the specific implementation process, it is worth noting that a mounting plate is fixed to the top of the horizontal plate 1. When adjusting the adjusting plate 21, the mounting plate is first removed, and after adjustment, it is reinstalled for the installation of the reduction motor 31. The reduction motor 31 drives the straight plate 32, and the straight plate 32 drives the counterweight 33 to move, which makes the blade float up and down. After the blade floats up and down several times, the personnel observe whether cracks and deformations appear on the surface of the blade. If no such conditions appear, it means that the strength of the blade meets the standard. Of course, during the testing process, corresponding sensing elements can be used to monitor the blade, which is conducive to monitoring the force on each position of the blade during the shaking process. After the blade shake is completed, a flaw detection device can be used to detect cracks and deformations that are not visible to the naked eye, so as to make the test results more accurate.

[0032] Furthermore, the fixing mechanism 34 includes: a plurality of fixing grooves 341, all formed on the surface of the straight plate 32; a fixing rod 342, rotatably connected to the bottom of the counterweight 33 via a pin; and a torsion spring 343, installed between the straight plate 32 and the counterweight 33; wherein, the fixing grooves 341 and the fixing rod 342 fix the counterweight 33 and the straight plate 32, and the torsion spring 343 provides a force to the fixing rod 342 as it approaches the fixing grooves 341;

[0033] In the specific implementation process, it is worth noting that during the process of making the blade float up and down, the size of the blade's up and down floating can be adjusted by adjusting the different positions of the counterweight 33 on the surface of the straight plate 32. When the counterweight 33 is closer to the reduction motor 31, the floating is smaller, and vice versa. After the position of the counterweight 33 is changed, the counterweight 33 is fixed by snapping the fixing rod 342 into the inner wall of the fixing groove 341, and the fixing rod 342 is restricted by the action of the torsion spring 343.

[0034] Specifically, based on the above embodiment 1, the reduction motor 31 drives the straight plate 32, and the straight plate 32 drives the counterweight 33 to move, which makes the blade float up and down. After the blade floats up and down multiple times, the personnel observe whether cracks or deformations appear on the surface of the blade. If these conditions do not occur, it indicates that the strength of the blade meets the standard. During the process of making the blade float up and down, the size of the blade's up and down movement can be adjusted by adjusting the position of the counterweight 33 on the surface of the straight plate 32. The closer the counterweight 33 is to the reduction motor 31, the smaller the movement, and vice versa. After the position of the counterweight 33 is changed, the counterweight 33 is fixed by snapping the fixing rod 342 into the inner wall of the fixing groove 341. The fixing rod 342 is restricted by the action of the torsion spring 343.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] 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 wind turbine blade strength testing device, comprising a horizontal plate (1), characterized in that: Two horizontal plates (1) are provided, and each of the two horizontal plates (1) has an extension device (2) on its outer wall. A drive unit (3) is provided above an adjustment plate (21). The extension device (2) includes: Two adjusting plates (21) are provided, which are respectively sleeved on both sides of the outer wall of the horizontal plate (1); The fixing bolt (22) is threaded to the inner wall of the adjusting plate (21) and abuts against the outer wall of the horizontal plate (1); An arc-shaped plate (23) is fixedly connected to the surface of the adjusting plate (21); A rubber pad (24) is fixedly connected to the surface of the arc-shaped plate (23); A clamping part (25) is disposed above the adjusting plate (21); The blades are adapted to different positions by adjusting the positions of the two adjustment plates (21) on the outer wall of the horizontal plate (1), fixing the adjustment plates (21) and the horizontal plate (1) by the fixing bolts (22), clamping the blades by the clamping part (25), and adapting the curvature of the blades by the arc plate (23) and the rubber pad (24).

2. The wind turbine blade strength testing device according to claim 1, characterized in that: A support pad (11) is fixedly connected to the surface of the horizontal plate (1).

3. The wind turbine blade strength testing device according to claim 1, characterized in that: The clamping part (25) includes: The screw (251) is fixedly connected to the top of one adjusting plate (21) and passes through the top of the other adjusting plate (21); The first nut (252) is threaded to the outer wall of the screw (251); Washer (253) is fitted onto the outer wall of screw (251); The second nut (254) is threaded to the outer wall of the first nut (252) on one side near the adjusting plate (21), and threaded to the outer wall of the screw (251) on the other side. The two adjusting plates (21) are fixed by the screw (251) and the first nut (252), the second nut (254) prevents the first nut (252) from loosening, and the washer (253) increases the friction between the first nut (252) and the adjusting plate (21).

4. The wind turbine blade strength testing device according to claim 1, characterized in that: The driving unit (3) includes: A geared motor (31) is fixedly connected to the top of the horizontal plate (1) located above; A straight plate (32) is fixedly connected to the output end of the geared motor (31); A counterweight (33) is fitted onto the outer wall of the straight plate (32); A fixing mechanism (34) is provided below the counterweight (33); The output end of the geared motor (31) drives the straight plate (32) and the counterweight (33) to rotate, causing the blade to float up and down. The straight plate (32) and the counterweight (33) are fixed by the fixing mechanism (34).

5. The wind turbine blade strength testing device according to claim 4, characterized in that: The fixing mechanism (34) includes: Multiple fixing grooves (341) are provided, all of which are opened on the surface of the straight plate (32); The fixing rod (342) is rotatably connected to the bottom of the counterweight (33) via a pin; A torsion spring (343) is installed between the straight plate (32) and the counterweight (33); The fixing groove (341) and fixing rod (342) fix the counterweight (33) and the straight plate (32), and the torsion spring (343) gives the fixing rod (342) a force close to the fixing groove (341).

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