Wind power blade fatigue test device

Abstract

The invention relates to the technical field of wind power blades, in particular to a wind power blade fatigue test device which comprises a test mechanism, the test mechanism comprises a base, four universal wheels are arranged at the bottom of the base and distributed in a rectangular shape, a first support is arranged at the top of the base, a driving assembly is arranged on the first support, and the driving assembly is arranged on the first support; the driving assembly is connected with a concave plate, the concave plate is driven to move up and down in a reciprocating mode through the driving assembly, the forward bending fatigue test and the reverse bending fatigue test of the blade are achieved, and the practicability of the device is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine blades, in particular to a wind turbine blade fatigue testing device. Background Art

[0002] Wind turbine blades are the core components of wind turbines that convert natural wind energy into electricity for wind turbines. They are also the main basis for measuring the design and technical level of wind turbines. The main material of wind turbine blades is made of epoxy resin, and the molecular structure of epoxy resin can undergo cross-linking reactions with various types of curing agents to form insoluble polymers with a three-dimensional network structure. The working environment of wind turbine blades is relatively harsh. They are usually installed in the wild, sparsely populated areas, and areas with strong winds. Therefore, the material of wind turbine blades needs to have a certain degree of corrosion resistance to avoid weathering. The molecular properties of epoxy resin enable it to withstand the harsh working environment of wind turbine blades. Another characteristic of epoxy resin is its low hardness, which requires a certain degree of fatigue testing of wind turbine blades before mass production to avoid the possibility of subsequent low strength and reduced service life.

[0003] At present, the fatigue test of wind turbine blades is to fix the blades and then achieve unidirectional bending of the blades by using a centrifugal pendulum fixed on the blades. Since wind turbine blades may encounter both positive bending and reverse bending during actual operation, it is difficult to conduct effective tests in this way. Therefore, a wind turbine blade fatigue test device is proposed. Summary of the invention

[0004] In view of the problem that only one-way bending of blades can be achieved in the prior art and that it is difficult to conduct effective tests in this way, since both positive and negative bending may occur in wind turbine blades during actual operation, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a wind turbine blade fatigue testing device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0007] The test mechanism comprises a base, wherein four universal wheels are arranged at the bottom of the base, and the four universal wheels are distributed in a rectangular shape; a first bracket is arranged at the top of the base, a driving assembly is arranged on the first bracket, and a concave plate is connected to the driving assembly.

[0008] As a preferred solution of the wind turbine blade fatigue test device of the present invention, wherein: the driving assembly comprises a driving motor mounted on a first bracket, the output end of the driving motor is connected to a first driving plate, a second driving plate is rotatably connected to the first driving plate, and an end of the second driving plate away from the first driving plate is connected to a vertical plate;

[0009] One end of the vertical plate away from the second driving plate is connected to the concave plate.

[0010] As a preferred solution of the wind turbine blade fatigue test device of the present invention, wherein: the driving assembly further comprises a second bracket arranged on the base, and the second bracket is connected to a first sliding sleeve;

[0011] The vertical plate slides through the first sliding sleeve.

[0012] As a preferred solution of the wind turbine blade fatigue test device of the present invention, the upper groove surface and the lower groove surface of the concave plate are both arc-shaped.

[0013] As a preferred solution of the wind turbine blade fatigue test device of the present invention, it also includes an adjustment mechanism arranged on the driving assembly, the adjustment mechanism includes a smooth rod arranged on the first driving plate and the vertical plate, a plurality of limit grooves are opened on the two smooth rods, and a second sliding sleeve is slidingly provided on the two smooth rods, the two ends of the second driving plate away from each other are respectively rotatably connected with the two second sliding sleeves, the second sliding sleeve is provided with a locking assembly for locking the second sliding sleeve and the smooth rod, and the locking assembly is provided with an unlocking assembly for unlocking the second sliding sleeve and the smooth rod.

[0014] As a preferred solution of the wind turbine blade fatigue test device of the present invention, the locking assembly includes a notch groove opened on the second sliding sleeve, a support plate is arranged inside the notch groove, a vertical rod is connected to the support plate, a first limit block is fixedly connected to the vertical rod, and a first inclined surface and a first plane are arranged on the first limit block.

[0015] As a preferred solution of the wind turbine blade fatigue test device of the present invention, the locking assembly further comprises a first spring fixedly connected to the first limit block away from the vertical rod, the first spring is connected to a cap at one end away from the first limit block, and the end of the cap is an arc surface;

[0016] The cap is sleeved on the first limiting block, and a sliding groove is provided on one side of the cap, and the support plate slides through the sliding groove.

[0017] As a preferred solution of the wind turbine blade fatigue test device of the present invention, the locking assembly further comprises a second limit block arranged inside the cover cap, the second limit block is provided with a second inclined surface and a second plane, a through slot is provided on the cover cap, the end of the second limit block away from the vertical rod passes through the through slot and is connected with a disc button, a second spring is connected to the side of the disc button close to the cover cap, and the end of the second spring away from the disc button is connected to the surface of the cover cap.

[0018] As a preferred solution of the wind turbine blade fatigue testing device of the present invention, the unlocking component includes a third spring and an auxiliary block slidably mounted on the surface of the vertical rod, one end of the third spring is connected to the auxiliary block, and the other end of the third spring is connected to the support plate, and a third inclined surface is arranged on the auxiliary block.

[0019] As a preferred solution of the wind turbine blade fatigue test device of the present invention, the unlocking assembly further includes a fourth inclined surface arranged on the auxiliary block, and a fifth inclined surface and a sixth inclined surface arranged on the first limit block and the second limit block respectively.

[0020] The beneficial effects of the wind turbine blade fatigue test device of the present invention are as follows: through the driving component, the concave plate is driven to move up and down reciprocatingly to realize the forward bending fatigue test and the reverse bending fatigue test of the blade; through the setting of the locking component, the locking between the second sliding sleeve and the smooth rod is realized, and through the unlocking component and the first sliding sleeve, the locking between the second sliding sleeve and the smooth rod is released, which not only makes the device suitable for different heights, but also can adjust the bending angle, thereby increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 This is the overall schematic diagram of the wind turbine blade fatigue test device.

[0023] Figure 2 This is a schematic diagram of the connection structure of the drive component part of the wind turbine blade fatigue test device.

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the adjustment mechanism of the wind turbine blade fatigue test device.

[0025] Figure 4 Fatigue test equipment for wind turbine blades Figure 3 Schematic diagram of the structure in part.

[0026] Figure 5 This is a partial structural schematic diagram of the locking component of a wind turbine blade fatigue test device.

[0027] Figure 6 This is a schematic diagram of the partial structure of the unlocking component of the wind turbine blade fatigue testing device. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1, reference Figure 1 to Figure 3 , is the first embodiment of the present invention, which provides a wind turbine blade fatigue test device, including a test mechanism 100, which includes a base 101, four universal wheels 102 are arranged at the bottom of the base 101, the four universal wheels 102 are distributed in a rectangular shape, and the four universal wheels 102 can be locked, a first bracket 103 is arranged on the top of the base 101, a driving component 104 is arranged on the first bracket 103, and a concave plate 105 is connected to the driving component 104. The concave plate 105 is driven by the driving component 104 to reciprocate up and down, so as to realize the forward bending fatigue test and the reverse bending fatigue test of the blade.

[0032] Furthermore, the driving assembly 104 includes a driving motor 104a installed on the first bracket 103, the output end of the driving motor 104a is connected to the first driving plate 104b, the first driving plate 104b is rotatably connected to the second driving plate 104c, the end of the second driving plate 104c away from the first driving plate 104b is connected to the vertical plate 104d, the end of the vertical plate 104d away from the second driving plate 104c is connected to the concave plate 105, and also includes a second bracket 104e arranged on the base 101, the second bracket 104e is connected to the first sliding sleeve 104f, the vertical plate 104d slides through the first sliding sleeve 104f, the first sliding sleeve 104f matches the vertical plate 104d, and the setting of the first sliding sleeve 104f ensures that the vertical plate 104d can only move up and down in the vertical direction.

[0033] Furthermore, the upper groove surface and the lower groove surface of the concave plate 105 are both arc-shaped. The arc-shaped setting makes it easy for the concave plate 105 to drive one end of the blade to move up and down, and there is a certain gap between the upper groove surface and the lower groove surface, so that the end of the blade can be bent.

[0034] In this embodiment, one end of the second driving plate 104c is rotatably connected to the first driving plate 104b, and the other end of the second driving plate 104c is rotatably connected to the vertical plate 104d.

[0035] When in use, first fix one end of the blade, move the device to a suitable position through the universal wheel 102, and place the other end of the blade between the two groove surfaces of the concave plate 105;

[0036] By turning on the driving motor 104a, the driving motor 104a drives the first driving plate 104b to rotate, and the first driving plate 104b drives the second driving plate 104c to rotate;

[0037] When the first driving plate 104b is in a horizontal state, the vertical plate 104d is in an initial state;

[0038] When the end of the first driving plate 104b away from the driving motor 104a rotates in the direction close to the vertical plate 104d, the first driving plate 104b drives the vertical plate 104d to rise through the second driving plate 104c, and the vertical plate 104d drives the concave plate 105 to rise, thereby realizing the downward bending of the blades;

[0039] When the end of the first driving plate 104b away from the driving motor 104a rotates in the direction away from the vertical plate 104d, the first driving plate 104b drives the vertical plate 104d downward through the second driving plate 104c, and the vertical plate 104d drives the concave plate 105 downward to achieve the upward bending of the blade;

[0040] As the driving motor 104a continuously drives the first driving plate 104b to rotate, the blades are continuously subjected to an up and down bending fatigue test.

[0041] The other end of the blade may also be located at the top or bottom of the concave plate 105. When it is located at the top, the first driving plate 104b drives the blade to bend downward when rotating in the direction close to the vertical plate 104d. When the end of the first driving plate 104b away from the driving motor 104a rotates in the direction away from the vertical plate 104d, the concave plate 105 does not contact the blade, that is, it does not drive the blade to bend upward, thereby realizing a unidirectional downward bending test.

[0042] On the contrary, when the other end of the blade is located at the bottom of the concave plate 105, a unidirectional upward bending test is achieved.

[0043] Example 2, reference Figure 2 to Figure 6, which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment also includes an adjustment mechanism 200 arranged on the driving assembly 104. The adjustment mechanism 200 includes a smooth rod 201 arranged on the first driving plate 104b and the vertical plate 104d. A plurality of limiting grooves 202 are provided on the two smooth rods 201, and a second sliding sleeve 203 is slidably provided on the two smooth rods 201. The two ends of the second driving plate 104c that are far away from each other are respectively rotatably connected with the two second sliding sleeves 203. The second sliding sleeve 203 is provided with a second sliding sleeve. The locking assembly 204 locks the sleeve 203 and the smooth rod 201, and the locking assembly 204 is provided with an unlocking assembly 205 for unlocking the second sleeve 203 and the smooth rod 201. Through the setting of the locking assembly 204, the locking between the second sleeve 203 and the smooth rod 201 is realized, and the unlocking assembly 205 cooperates with the first sleeve 104f to release the lock between the second sleeve 203 and the smooth rod 201, which not only makes the device suitable for different heights, but also can adjust the bending angle, thereby increasing the practicability of the device.

[0044] Furthermore, the locking assembly 204 includes a notch groove 204a opened on the second sliding sleeve 203, a support plate 204b is fixedly arranged inside the notch groove 204a, and the support plate 204b is horizontally installed, a vertical rod 204c is fixedly connected to the top of the support plate 204b, a first limit block 204d is fixedly connected to the vertical rod 204c, and the first limit block 204d is provided with a first inclined surface 204e and a first plane 204f.

[0045] Furthermore, the locking assembly 204 further comprises a first spring 204g fixedly connected to the first limit block 204d on one side away from the vertical rod 204c, and a cap 204h is connected to one end of the first spring 204g away from the first limit block 204d, and the end of the cap 204h is an arc surface, and the setting of the arc surface facilitates the end of the cap 204h to be inserted into the limit groove 202 to achieve locking of the second sliding sleeve 203, and the cap 204h is sleeved on the first limit block 204d, and a sliding groove 204h-1 is opened on one side of the cap 204h, and the support plate 204b slides through the sliding groove 204h- 1. The slide groove 204h-1 matches the support plate 204b. The support plate 204b is not only used to support the vertical rod 204c, but also cooperates with the slide groove 204h-1 to ensure the vertical movement of the cap 204h, so as to avoid that when the cap 204h is pressed down, it is impossible to ensure that the applied force is vertical, causing the first spring 204g to tilt and be compressed, thereby causing the first spring 204g to be partially deformed and affecting the performance of the first spring 204g. At the same time, it also ensures that the second inclined surface 204j on the second limit block 204i is aligned with the first inclined surface 204e on the first limit block 204d.

[0046] Furthermore, the locking assembly 204 also includes a second limit block 204i arranged inside the cap 204h, the second limit block 204i is provided with a second inclined surface 204j and a second plane 204k, the cap 204h is provided with a through slot 204l, the end of the second limit block 204i away from the vertical rod 204c passes through the through slot 204l and is connected to a button 204m, the side of the button 204m close to the cap 204h is connected to a second spring 204n, and the end of the second spring 204n away from the button 204m is connected to the surface of the cap 204h.

[0047] The rest of the structure is the same as that of Example 1.

[0048] In this embodiment, both ends of the second driving plate 104c are connected to the first driving plate 104b and the two smooth rods 201 on the vertical plate 104d respectively through the second sliding sleeve 203;

[0049] When the position of the sliding sleeve on the first driving plate 104b is fixed, and the second sliding sleeve 203 on the vertical plate 104d is unlocked from the smooth rod 201 thereon, at this time, the vertical plate 104d can slide up and down along the first sliding sleeve 104f, and by pulling up the vertical plate 104d or pushing down the vertical plate 104d, the vertical plate 104d drives the concave plate 105 to move up or down. When it moves to a suitable position, the second sliding sleeve 203 is locked with the smooth rod 201 on the vertical plate 104d, so that the height of the concave plate 105 can be adjusted, and the device can be applied to fixtures of different heights.

[0050] When the second sliding sleeve 203 on the first driving plate 104b and the vertical plate 104d are both unlocked, the second sliding sleeve 203 on the first driving plate 104b is pushed to move. As the distance between the second sliding sleeve 203 on the first driving plate 104b and the rotation center of the first driving plate 104b changes, the bending degree is adjusted. When adjusting, if there is no need to adjust the height, just ensure that the vertical plate 104d does not move. When the second sliding sleeve 203 on the first driving plate 104b slides, it will drive the second sliding sleeve 203 on the vertical plate 104d to slide through the second driving plate 104c. After completion, the two sliding sleeves can be locked.

[0051] When in use, by pressing the cap 204h, the cap 204h squeezes the first spring 204g, so that the first spring 204g is compressed, and at the same time, the cap 204h drives the second inclined surface 204j on the second limiting block 204i to contact the first inclined surface 204e on the first limiting block 204d, so that the second limiting block 204i moves toward the outside of the cap 204h, and the second limiting block 204i drives the second spring 204n to lengthen through the button 204m. When the second limiting block 204i When the second inclined surface 204j on the second limit block 204i does not contact the first inclined surface 204e on the first limit block 204d, at this time, one end of the cap 204h enters the limiting groove 202 to limit the movement of the second sliding sleeve 203, and at this time, under the elastic force of the second spring 204n, the second limit block 204i is reset, so that the second plane 204k on the second limit block 204i corresponds to the first plane 204f on the first limit block 204d, thereby locking the cap 204h.

[0052] In this embodiment, when it is necessary to unlock the second sleeve 203, the button 204m is pulled, and the button 204m drives the second spring 204n to lengthen. At the same time, the button 204m drives the second limit block 204i to move outward from the cap 204h, so that the second plane 204k on the second limit block 204i is misaligned with the first plane 204f on the first limit block 204d. With the elastic force of the first spring 204g, the cap 204h is reset, so that the end of the cap 204h is disengaged from the inside of the limit groove 202, thereby releasing the lock on the second sleeve 203.

[0053] Example 3, reference Figure 2 to Figure 6 , which is the third embodiment of the present invention. Different from the previous embodiment, the unlocking component 205 in this embodiment includes a third spring 205a and an auxiliary block 205b slidably mounted on the surface of the vertical rod 204c, one end of the third spring 205a is connected to the auxiliary block 205b, and the other end of the third spring 205a is connected to the support plate 204b, and a third inclined surface 205c is provided on the auxiliary block 205b.

[0054] Furthermore, the unlocking assembly 205 also includes a fourth inclined surface 205d arranged on the auxiliary block 205b, and a fifth inclined surface 205e and a sixth inclined surface 205f arranged on the first limit block 204d and the second limit block 204i respectively, and the elastic force of the first spring 204g is greater than the total gravity of the cap 204h and the second limit block 204i and the button 204m thereon, and the elastic force of the second spring 204n is greater than the gravity of the auxiliary block 205b plus the elastic force of the third spring 205a.

[0055] The rest of the structure is the same as that of Example 2.

[0056] In the initial state, the auxiliary block 205b is in contact with the support plate 204b to prevent the second inclined surface 204j on the second limiting block 204i from squeezing the fourth inclined surface 205d on the auxiliary block 205b and driving the auxiliary block 205b to move, thereby affecting the unlocking of the second sliding sleeve 203.

[0057] In this embodiment, when it is necessary to unlock the second sliding sleeve 203, the cap 204h is continuously pressed, and the cap 204h continues to move, so that the cap 204h drives the second inclined surface 204j on the second limiting block 204i to contact the fourth inclined surface 205d on the auxiliary block 205b, so that the second limiting block 204i moves outward from the cap 204h. When the second inclined surface 204j on the second limiting block 204i is misaligned with the fourth inclined surface 205d on the auxiliary block 205b, Under the elastic force of the spring 204n, the end of the second limit block 204i contacts the third inclined surface 205c on the auxiliary block 205b. At this time, under the elastic force of the first spring 204g, the cap 204h is reset, and the cap 204h drives the auxiliary block 205b to approach the first limit block 204d through the second limit block 204i. The auxiliary block 205b drives the third spring 205a to stretch. When the auxiliary block 205b and the first limit block 204d are close to each other, When the auxiliary block 205b cannot move further, and the cap 204h continues to move, the second limit block 204i moves to the outside of the cap 204h under the action of the third inclined surface 205c on the auxiliary block 205b. When the end of the second limit block 204i is no longer in contact with the third inclined surface 205c of the auxiliary block 205b, the auxiliary block 205b is reset under the elastic force of the third spring 205a, and at this time, under the elastic force of the second spring 204n, the second limit block 204i is reset. Block 204i is reset to a small position, and the sixth inclined surface 205f on the second limit block 204i contacts the fifth inclined surface 205e on the first limit block 204d. Under the elastic force of the first spring 204g, the cap 204h continues to rise until the sixth inclined surface 205f on the second limit block 204i is misaligned with the fifth inclined surface 205e on the first limit block 204d. The second limit block 204i is reset to complete the unlocking. The whole process only requires pressing the cap 204h, which is simple and quick.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wind turbine blade fatigue test device, characterized in that: include, A test mechanism (100) comprises a base (101), wherein four universal wheels (102) are arranged at the bottom of the base (101), and the four universal wheels (102) are distributed in a rectangular shape; a first bracket (103) is arranged at the top of the base (101), a driving assembly (104) is arranged on the first bracket (103), and a concave plate (105) is connected to the driving assembly (104).

2. The wind turbine blade fatigue test device according to claim 1, characterized in that: The driving assembly (104) comprises a driving motor (104a) mounted on a first bracket (103); an output end of the driving motor (104a) is connected to a first driving plate (104b); a second driving plate (104c) is rotatably connected to the first driving plate (104b); and an end of the second driving plate (104c) away from the first driving plate (104b) is connected to a vertical plate (104d); One end of the vertical plate (104d) away from the second driving plate (104c) is connected to the concave plate (105).

3. The wind turbine blade fatigue test device according to claim 2, characterized in that: The driving assembly (104) further comprises a second bracket (104e) arranged on the base (101), and the second bracket (104e) is connected to a first sliding sleeve (104f); The vertical plate (104d) slides through the first sliding sleeve (104f).

4. The wind turbine blade fatigue test device according to claim 2 or 3, characterized in that: The upper groove surface and the lower groove surface of the concave plate (105) are both arc-shaped.

5. The wind turbine blade fatigue test device according to claim 4, characterized in that: The invention also comprises an adjusting mechanism (200) arranged on the driving assembly (104), wherein the adjusting mechanism (200) comprises a smooth rod (201) arranged on the first driving plate (104b) and the vertical plate (104d), a plurality of limit grooves (202) are provided on the two smooth rods (201), and a second sliding sleeve (203) is slidably provided on the two smooth rods (201), and the two ends of the second driving plate (104c) which are far from each other are respectively rotatably connected with the two second sliding sleeves (203), and the second sliding sleeve (203) is provided with a locking assembly (204) for locking the second sliding sleeve (203) and the smooth rod (201), and the locking assembly (204) is provided with an unlocking assembly (205) for unlocking the second sliding sleeve (203) and the smooth rod (201).

6. The wind turbine blade fatigue test device according to claim 5, characterized in that: The locking assembly (204) comprises a notch groove (204a) formed on the second sliding sleeve (203), a support plate (204b) being arranged inside the notch groove (204a), a vertical rod (204c) being connected to the support plate (204b), a first limiting block (204d) being fixedly connected to the vertical rod (204c), and a first inclined surface (204e) and a first plane (204f) being arranged on the first limiting block (204d).

7. The wind turbine blade fatigue test device according to claim 6, characterized in that: The locking assembly (204) further comprises a first spring (204g) fixedly connected to a side of the first limit block (204d) away from the vertical rod (204c), one end of the first spring (204g) away from the first limit block (204d) is connected to a cover cap (204h), and the end of the cover cap (204h) is an arc surface; The cover cap (204h) is sleeved on the first limit block (204d), and a slide groove (204h-1) is provided on one side of the cover cap (204h), and the support plate (204b) slides through the slide groove (204h-1).

8. The wind turbine blade fatigue test device according to claim 7, characterized in that: The locking assembly (204) further comprises a second limiting block (204i) arranged inside the cover cap (204h), the second limiting block (204i) being provided with a second inclined surface (204j) and a second plane (204k), the cover cap (204h) being provided with a through slot (204l), one end of the second limiting block (204i) away from the vertical rod (204c) passing through the through slot (204l) and being connected to a button (204m), a side of the button (204m) close to the cover cap (204h) being connected to a second spring (204n), and one end of the second spring (204n) away from the button (204m) being connected to the surface of the cover cap (204h).

9. The wind turbine blade fatigue test device according to claim 8, characterized in that: The unlocking assembly (205) comprises a third spring (205a) and an auxiliary block (205b) slidably mounted on the surface of the vertical rod (204c); one end of the third spring (205a) is connected to the auxiliary block (205b), and the other end of the third spring (205a) is connected to the support plate (204b); and a third inclined surface (205c) is provided on the auxiliary block (205b).

10. The wind turbine blade fatigue test device according to claim 9, characterized in that: The unlocking assembly (205) further comprises a fourth inclined surface (205d) provided on the auxiliary block (205b), and a fifth inclined surface (205e) and a sixth inclined surface (205f) provided on the first limiting block (204d) and the second limiting block (204i), respectively.

Images