A test device for simulating the load action at the hub of a wind turbine

Abstract

The application provides a test device for simulating load action at a hub of a wind turbine, comprising: a first fixing table with a first fixing surface; a bending moment applying mechanism arranged on the first fixing surface, the bending moment applying mechanism having a bending moment applying end, the bending moment applying end being rotatable about a first axis and movable along the extension direction of the first axis; a first rotary driving member arranged on the bending moment applying end; the first rotary driving member having a first output shaft and being rotatable about a second axis, the second axis being perpendicular to the first axis, the main shaft coupling being connected to the first output shaft, the other end of the main shaft coupling being connected to a main shaft extending in a first direction, the first direction being parallel to the extension direction of the second axis; the other end of the main shaft being connected to a gear box, the other end of the gear box being connected to a load motor, the bending moment applying mechanism can simulate the load acting on the wind turbine in all directions in the actual environment, so that the wind turbine can be closer to the actual wind condition in the simulation state.

Description

Technical Field

[0001] This invention relates to the field of wind power generation testing technology, specifically to a test device for simulating the load at the hub of a wind turbine. Background Technology

[0002] Existing experimental platforms can only simulate the torque load in one direction of the wind turbine. However, in actual operation, the wind turbine is subjected to forces from different directions, and the magnitudes of these forces are not consistent. A single load simulation cannot express the actual wind conditions, which will lead to the inability to conduct a comprehensive evaluation during the test. For example, it may result in defects such as excessive waste or inadequacy in the design of gearbox materials. Summary of the Invention

[0003] The purpose of this invention is to address the above problems by providing a test apparatus for simulating the load at the hub of a wind turbine generator. The test apparatus includes:

[0004] A first fixed platform, the first fixed platform having a first fixed surface;

[0005] A bending moment applying mechanism is disposed on the first fixed surface. The bending moment applying mechanism has a bending moment applying end, which can rotate about a first axis and move about the extension direction of the first axis.

[0006] A first rotary drive unit is disposed on the bending moment application end and has a first output shaft. The first output shaft is rotatable about a second axis, which is perpendicular to the first axis. The first output shaft is connected to a main shaft coupling. The end of the main shaft coupling that is relatively far from the first output shaft is connected to a main shaft. The main shaft extends along a first direction, which is parallel to the extension direction of the second axis.

[0007] A gearbox is connected to the end of the main shaft that is relatively away from the main shaft coupling.

[0008] A load motor is connected to the end of the gearbox that is relatively away from the main shaft.

[0009] According to the technical solution provided by the embodiment of the present invention, the bending moment application mechanism includes a first telescopic member that can extend and retract along a second direction. The first telescopic member has a first telescopic end, and the first rotation drive member is disposed on the first telescopic end. The second direction is perpendicular to the first direction.

[0010] According to the technical solution provided by the embodiment of the present invention, the bending moment application mechanism includes a fixed seat disposed on the first fixed surface, a plurality of support plates extending along the second direction are disposed around the fixed seat, a slide rail extending along the second direction is disposed on the support plate, the plurality of support plates together form a first space, the first telescopic end is located in the first space, a first sliding plate is disposed on the first telescopic end, and the first sliding plate is slidably connected to the slide rail.

[0011] According to the technical solution provided by the embodiment of the present invention, the slide rail is disposed on the surface of the support plate, and a slider is provided around the first sliding plate. The slider is provided with a groove that matches the slide rail. A clamping assembly is provided on the slider. The clamping assembly has a clamping end, which contacts the slide rail surface and can move along the extension direction of the slide rail.

[0012] According to the technical solution provided by the embodiment of the present invention, a second rotary drive member is further provided on the fixed base. The second rotary drive member has a second output shaft that can rotate around a third axis. The third axis is parallel to the first axis. A rotating component is provided on the side of the first sliding plate that is relatively far away from the fixed base. The second output shaft is used to drive the rotating component to rotate around the first axis.

[0013] According to the technical solution provided by the embodiments of the present invention, the rotating assembly includes a first gear disposed on the second output shaft, the first gear meshing with a second gear, and the second gear being disposed on the first sliding plate and rotatable about the first axis.

[0014] According to the technical solution provided by the embodiments of the present invention, the rotating assembly further includes a first rotating plate, which is disposed on the side of the second gear that is relatively far away from the first sliding plate.

[0015] According to the technical solution provided by the embodiments of the present invention, the clamping assembly includes a second telescopic member disposed on the slider, the second telescopic member being telescopic along the first direction, and a clamping member being provided on the second telescopic member, the clamping member having the clamping end.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a bending moment application mechanism on a first fixed platform, which has a bending moment application end. The bending moment application end can rotate around a first axis and move along the extension direction of the first axis. A first rotary drive member is provided on the bending moment application end. The first rotary drive member has a first output shaft. The first output shaft can rotate around a second axis, which is perpendicular to the first axis. The first output shaft is connected to a main shaft coupling. The other end of the main shaft coupling is connected to a main shaft. The main shaft extends along a first direction, which is parallel to the extension direction of the second axis. The other end of the main shaft is connected to a gearbox, and the other end of the gearbox is connected to a load motor.

[0017] During operation, when the first rotary drive unit drives the spindle coupling and spindle to rotate around the second axis, the first rotary drive unit can provide a torque in the X direction to the spindle coupling. When the bending moment application mechanism rotates around the first axis, the rotary drive unit will also drive the spindle coupling and spindle to rotate around the first axis, thereby providing a torque in the Z direction to the spindle coupling. When the bending moment application mechanism moves along the extension direction of the first axis, the first rotary drive unit will provide a torque in the Y direction to the spindle coupling. By providing a bending moment application mechanism, torque variations in various directions can be provided to the spindle coupling, realizing the spindle coupling... The shaft coupling can receive torque changes from all directions, which can better simulate the actual working environment of wind power generation. The torque and speed applied to the main shaft coupling will be transmitted to the gearbox through the main shaft. The gearbox will reduce the torque and increase the speed, and then transmit it to the load motor. The load motor will rotate under the drive of the rotary drive component, and at the same time generate a torque. The load motor will transmit the torque generated by itself to the gearbox. The gearbox will reduce the torque generated by the load motor, and then transmit it to the main shaft coupling through the main shaft, thereby giving the main shaft coupling a reverse force.

[0018] This invention, by incorporating a bending moment application mechanism, can apply forces to the main shaft coupling in various directions, simulating the load conditions of a wind turbine in various directions under real-world conditions. This makes the simulated operation more closely resemble actual wind conditions, enabling a comprehensive evaluation of the wind turbine's performance from the main shaft coupling to the load motor, thus improving the reliability of wind turbine operation. Furthermore, it allows for the simulation of loads under different operating conditions without disassembling the device, reducing the number of experiments, increasing experimental efficiency, and reducing experimental costs. It provides more realistic data on the wind turbine's operating state under more realistic loads, offering more accurate performance data to support actual product development. Simultaneously, this invention can conduct load life tests on the wind turbine under multiple operating conditions, obtaining more reliable data and providing strong reference data for the actual operation of the wind turbine. Attached Figure Description

[0019] Figure 1A schematic diagram of the overall structure of the test device for simulating the load at the hub of a wind turbine provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the bending application mechanism provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram showing the connection between the clamping assembly and the slider provided in an embodiment of the present invention;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the clamping assembly provided in an embodiment of the present invention.

[0024] The text labels in the figure represent: 1. First fixed platform; 101. First rotary drive component; 2. Main spindle coupling; 201. Main spindle fixing component; 3. Main spindle; 4. Gearbox; 401. Gearbox fixing component; 402. Output shaft coupling; 5. Load motor; 6. First telescopic component; 7. Fixed base; 8. Support plate; 9. Slide rail; 10. First sliding plate; 11. Slider; 12. Clamping end; 13. Second rotary drive component; 14. First gear; 15. Second gear; 16. First rotating plate; 17. Second telescopic component; 18. Clamping component; 19. Brake caliper; 20. Connecting component; 21. Hinge shaft. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0026] A test apparatus for simulating loads at the hub of a wind turbine generator, the test apparatus comprising:

[0027] A first fixed platform 1, the first fixed platform 1 having a first fixed surface;

[0028] A bending moment applying mechanism is disposed on the first fixed surface. The bending moment applying mechanism has a bending moment applying end, which can rotate about a first axis and move about the extension direction of the first axis.

[0029] A first rotary drive 101 is disposed on the moment application end and has a first output shaft. The first output shaft is rotatable about a second axis, which is perpendicular to the first axis. The first output shaft is connected to a main shaft coupling 2. The end of the main shaft coupling 2 that is relatively far from the first output shaft is connected to a main shaft 3. The main shaft 3 extends along a first direction, which is parallel to the extension direction of the second axis.

[0030] Gearbox 4 is connected to one end of the main shaft 3 that is relatively away from the main shaft coupling 2;

[0031] The load motor 5 is connected to the end of the gearbox 4 that is away from the main shaft 3.

[0032] Specifically, in this embodiment, please refer to Figure 1 The first fixed platform 1 is rectangular in shape and has a first fixed surface. A bending moment applying mechanism is fixed on the first fixed platform 1, for example, by means of bolts. The bending moment applying mechanism has a bending moment applying end, which can rotate around a first axis and can also move along the extension direction of the first axis. Figure 1 The middle direction is vertical. A first rotary drive 101 is fixed at the end where the bending moment is applied. The first rotary drive 101 is a rotary motor. The first rotary drive 101 has a first output shaft, which can rotate around a second axis. The extension direction of the second axis is perpendicular to the extension direction of the first axis. Figure 1 In the horizontal direction, a spindle coupling 2 is fixedly connected to the first output shaft. A spindle 3 is connected to the end of the spindle coupling 2 that is relatively far from the first output shaft. The spindle coupling 2 enables the spindle 3 to rotate together with the first output shaft and transmits the motion and torque generated by the first output shaft. A spindle fixing member 201 is also provided on the first fixed platform 1. The spindle fixing member 201 has a first through hole. The shape of the spindle fixing member 201 is as follows: Figure 1 As shown, the main shaft 3 is slidably connected to the first through hole, meaning the main shaft 3 can rotate inside the first through hole. The main shaft 3 extends along a first direction, which is... Figure 1 As shown in the horizontal direction, and the first direction is parallel to the extension direction of the second axis, the main shaft 3 is connected to a gearbox 4 at one end relatively away from the main shaft coupling 2, and a gearbox fixing member 401 is provided at the bottom of the gearbox 4, the shape of the gearbox fixing member 401 is as shown in the figure. Figure 1As shown, the gearbox fixing member 401 is fixedly connected to the first fixed platform 1 at one end away from the gearbox 4. The gearbox fixing member 401 is used to provide support for the gearbox 4. The gearbox 4 is equipped with gears. The gearbox 4 can increase the rotational speed transmitted to the main shaft 3 by the first rotary drive member 101 and reduce the torque transmitted to the main shaft 3. The end of the gearbox 4 away from the main shaft 3 is connected to the load motor 5 through the output shaft coupling 402. The load motor 5 is a generator in actual operation. The generator at different speeds will generate different resistances to the gearbox 4. The load motor 5 is mainly used to simulate the load of the fan in the actual working state, that is, the real resistance encountered by the fan rotation in the actual working process. In addition, the load motor 5 can also be used to detect parameters such as the output power and output efficiency of the gearbox 4. By measuring the current and voltage of the load motor 5, its output power and output efficiency can be calculated.

[0033] During use, when the first rotary drive 101 drives the spindle coupling 2 and the spindle 3 to rotate together around the second axis, the first rotary drive 101 can provide the spindle coupling 2 with a first torque in the X-axis direction, and drive the spindle coupling 2 and the spindle 3 to rotate around the second axis at a first speed. The gearbox 4 receives the torque and the first speed from the spindle 3. The second torque transmitted through the gearbox 4 will be less than the first torque, and the second speed will be higher than the first speed. Then, the load motor 5 is driven to rotate at the second speed. The load motor 5 will generate a reverse first torque, which will be transmitted to the inside of the gearbox 4 through the output shaft coupling 402. The second torque transmitted through the gearbox 4 will be less than the first torque. The torque is transmitted to the main shaft coupling 2 through the main shaft 3, giving the main shaft coupling 2 a resistance, which can simulate the resistance of the wind turbine in real conditions. When the bending moment application mechanism rotates around the first axis, the first rotary drive 101 fixed on the bending moment application end will also rotate together, thereby giving the main shaft coupling 2 a torque in the Z direction. When the bending moment application mechanism rotates along the extension direction of the first axis, the first rotary drive 101 will give the main shaft coupling 2 a torque in the Y direction. By providing a bending moment application mechanism, torques in various directions can be given to the main shaft coupling 2, thereby better simulating the forces from various directions on the wind turbine blades during wind power generation, and simulating the wind turbine being loaded in various directions in the actual environment.

[0034] Furthermore, the bending moment application mechanism includes a first telescopic member 6 that can extend and retract along a second direction. The first telescopic member 6 has a first telescopic end, and the first rotation drive member 101 is disposed on the first telescopic end. The second direction is perpendicular to the first direction.

[0035] Specifically, in this embodiment, please refer to Figure 2 The bending moment application mechanism includes a first telescopic member 6, which is a compression cylinder. The first telescopic member 6 has a first telescopic end and can extend and retract along a second direction, which is shown as... Figure 2 The vertical direction shown is the second direction, which is perpendicular to the first direction.

[0036] Furthermore, the bending moment application mechanism includes a fixed seat 7 disposed on the first fixed surface, and several support plates 8 extending along the second direction are disposed around the fixed seat 7. The support plates 8 are provided with slide rails 9 extending along the second direction. The several support plates 8 together form a first space. The first telescopic end is located in the first space. A first sliding plate 10 is disposed on the first telescopic end. The first sliding plate 10 is slidably connected to the slide rails 9.

[0037] Specifically, in this embodiment, please refer to Figure 2 The bending moment application mechanism further includes a fixed base 7, which is disposed on the first fixed surface. The fixed base 7 is cuboid in shape and is fixedly connected to the first fixed surface. Several support plates 8 are provided around the fixed base 7, extending along the second direction. In this embodiment, there are four support plates 8, which are respectively located at the four right angles of the fixed base 7 and are parallel to each other. Please refer to [reference needed]. Figure 3 Each of the support plates 8 is provided with a slide rail 9. There are two slide rails 9 on each support plate 8, and the two slide rails 9 are parallel to each other and extend along the second direction. The two slide rails 9 on each support plate 8 are respectively opposite to each other. The four support plates 8 together form a first space. The first telescopic end is located inside the first space. A first sliding plate 10 is also provided on the first telescopic end. The first sliding plate 10 is cuboid in shape. The first sliding plate 10 is slidably connected to the slide rail 9. When the first telescopic member 6 extends or retracts along the second direction, the first sliding plate 10 will also slide up and down along the slide rail 9, thereby providing torque to the main shaft coupling 2 in the Z direction.

[0038] Furthermore, the slide rail 9 is disposed on the surface of the support plate 8, and a slider 11 is provided around the first sliding plate 10. The slider 11 is provided with a groove that matches the slide rail 9. A clamping assembly is provided on the slider 11. The clamping assembly has a clamping end 12. The clamping end 12 is in contact with the surface of the slide rail 9 and can move along the extension direction of the slide rail 9.

[0039] Specifically, in this embodiment, the slide rail 9 is disposed on the surface of the support plate 8, that is, the slide rail 9 protrudes relative to the support plate 8. The slide rail 9 and the support plate 8 together form a U-shaped shape, with the protruding end of the U-shape facing the first space. Slider blocks 11 are provided around the first sliding plate 10. The slider blocks 11 have grooves extending along the second direction. The grooves are slidably connected to the slide rail 9. A clamping assembly is provided on the slider blocks 11. The clamping assembly is fixedly connected to the slider blocks 11. The clamping assembly has a clamping end 12, which can contact the slide rail surface and can also move along the extending direction of the slide rail 9. During use, when the first telescopic end drives the first sliding plate 10 to move upward, the first telescopic end is also equipped with a rotary motor, which vibrates during operation. Furthermore, the first sliding plate 10 is subject to limiting forces from the main shaft coupling 2 and the main shaft 3 during its upward movement. Therefore, the first sliding plate 10 becomes unstable during its upward sliding. To address this, a clamping assembly is provided on the slider 11. When the first sliding plate 10 moves upward, the clamping assembly clamps the slide rail 9, providing downward resistance to the slider 11, thus ensuring stable movement of the first sliding plate 10 during its upward sliding.

[0040] Furthermore, a second rotary drive member 13 is provided on the fixed base 7. The second rotary drive member 13 has a second output shaft that can rotate about a third axis, which is parallel to the first axis. A rotating component is provided on the side of the first sliding plate 10 that is relatively far away from the fixed base 7. The second output shaft is used to drive the rotating component to rotate about the first axis.

[0041] Specifically, in this embodiment, a second rotary drive 13 is also provided on the fixed base 7. The second rotary drive 13 has a second output shaft, which can rotate around a third axis. The extension direction of the third axis is parallel to the extension direction of the first axis. A rotating component is provided on the side of the first sliding plate 10 that is relatively far away from the fixed base 7. The second output shaft can drive the rotating component to rotate around the first axis, thereby providing a torque to the main shaft coupling 2 in the Z direction.

[0042] Furthermore, the rotating assembly includes a first gear 14 disposed on the second output shaft, the first gear 14 meshing with a second gear 15, the second gear 15 being disposed on the first sliding plate 10 and rotatable around the first axis.

[0043] Specifically, in this embodiment, the rotating assembly includes a first gear 14, which is connected to the second output shaft. The first gear 14 meshes with a second gear 15, and the first gear 14 and the second gear 15 are in... Figure 2 The first gear 14 and the second gear 15 are arranged horizontally, and the diameter of the second gear 15 is larger than the diameter of the first gear 14. When the second output shaft rotates, the first gear 14 and the second gear 15 will also rotate. A fixed shaft extending along the second direction is fixedly provided on the first sliding plate 10. A bearing is provided in the second gear 15. The fixed shaft is connected to the side of the bearing that is away from the second gear 15. The second gear 15 can rotate around the axis of the fixed shaft, that is, the direction of the first axis.

[0044] Furthermore, the rotating assembly also includes a first rotating plate 16, which is disposed on the side of the second gear 15 that is relatively away from the first sliding plate 10.

[0045] Specifically, in this embodiment, the rotating assembly further includes a first rotating plate 16, which is cubic in shape and located within the first space. The first rotating plate 16 is disposed on the side of the second gear 15 that is relatively far away from the first sliding plate 10. The first rotating plate 16 can rotate with the second gear 15 within the first space. The end of the first rotating plate 16 that is relatively far away from the second gear 15 is fixedly connected to the first rotating drive member 101.

[0046] Furthermore, the clamping assembly includes a second telescopic member 17 disposed on the slider 11. The second telescopic member 17 is telescopic along the first direction. The second telescopic member 17 is provided with a clamping member 18, and the clamping member 18 has the clamping end 12.

[0047] Specifically, in this embodiment, please refer to Figure 4 and Figure 5The clamping assembly includes a second telescopic member 17 fixedly mounted on the slider 11. The second telescopic member 17 is a bidirectional telescopic cylinder, capable of telescopic extension and retraction along the first direction. Brake calipers 19 are connected to both ends in the second direction, with the extension direction of the brake calipers 19 perpendicular to the first direction. Both brake calipers 19 extend in the same direction. Clamping ends 12 are respectively provided at the ends of the two brake calipers 19 furthest from the second telescopic member 17. The clamping ends 12 are cubic in shape. 2. The two brake calipers 19 are in contact with the slide rail 9. A connecting member 20 is also provided on the two brake calipers 19. The connecting member 20 extends along the first direction. Both ends of the connecting member 20 are hinged to each of the brake calipers 19. When the second telescopic member 17 extends, the two brake calipers 19 will rotate around the hinge axis 21 so that the two clamping ends 12 are relatively close. When the second telescopic member 17 shortens, the two brake calipers 19 will rotate around the hinge axis 21 so that the two clamping ends 12 rotate away from each other.

[0048] It also includes a control system capable of cyclically driving the first rotary drive 101. The control system is signal-connected to the first rotary drive 101, providing a first signal to the first rotary drive 101. The first signal includes the rotational speed and torque magnitude of the first rotary drive 101. The control system is also signal-connected to a second rotary drive 13. Because different types of wind turbines have extreme load conditions in their actual design, when the first rotary drive 101 rotates, if the control system detects that the torque in the X direction has reached the maximum value of the wind turbine in the X direction, then... The control system will send a stop signal to the first rotary drive 101; when the first telescopic member pushes the first rotary drive 101 to move along the Y-axis, if the control system detects that the torque in the Y-axis direction reaches the maximum value of the fan in the Y-axis direction, it will send a stop signal to the first drive; when the first rotary drive 101 rotates around the third axis, it will give the main shaft coupling 2 a torque in the Z-axis. When the control system detects that the torque in the Z-axis direction reaches the maximum value of the fan in the Z-axis direction, it will send a stop signal to the second rotary drive 13.

[0049] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A test apparatus for simulating loads at the hub of a wind turbine generator, characterized in that, include: A first fixed platform (1) having a first fixed surface; A bending moment applying mechanism is disposed on the first fixed surface. The bending moment applying mechanism has a bending moment applying end, which can rotate about a first axis and can move along the extension direction of the first axis. A first rotary drive (101) is disposed on the moment application end and has a first output shaft. The first output shaft is rotatable about a second axis, which is perpendicular to the first axis. The first output shaft is connected to a main shaft coupling (2). The main shaft coupling (2) is connected to a main shaft (3) at the end that is relatively away from the first output shaft. The main shaft (3) extends along a first direction, which is parallel to the extension direction of the second axis. Gearbox (4), the gearbox (4) is connected to the end of the main shaft (3) that is relatively away from the main shaft coupling (2); A load motor (5) is connected to the end of the gearbox (4) that is relatively away from the main shaft (3).

2. The test apparatus for simulating the load at the hub of a wind turbine generator according to claim 1, characterized in that, The bending moment application mechanism includes a first telescopic member (6) that can extend and retract along a second direction. The first telescopic member (6) has a first telescopic end, and the first rotation drive member (101) is disposed on the first telescopic end. The second direction is perpendicular to the first direction.

3. The test apparatus for simulating the load at the hub of a wind turbine generator according to claim 2, characterized in that, The bending moment application mechanism includes a fixed seat (7) on the first fixed surface, and several support plates (8) extending along the second direction are provided around the fixed seat (7). The support plates (8) are provided with slide rails (9) extending along the second direction. The several support plates (8) together form a first space. The first telescopic end is located in the first space. A first sliding plate (10) is provided on the first telescopic end. The first sliding plate (10) is slidably connected to the slide rail (9).

4. The test apparatus for simulating the load at the hub of a wind turbine generator according to claim 3, characterized in that, The slide rail (9) is disposed on the surface of the support plate (8). A slider (11) is provided around the first sliding plate (10). The slider (11) is provided with a groove that matches the slide rail (9). A clamping assembly is provided on the slider (11). The clamping assembly has a clamping end (12). The clamping end (12) contacts the surface of the slide rail (9) and can move along the extension direction of the slide rail (9).

5. The test apparatus for simulating the load at the hub of a wind turbine generator according to claim 4, characterized in that, A second rotary drive (13) is also provided on the fixed base (7). The second rotary drive (13) has a second output shaft that can rotate about a third axis, which is parallel to the first axis. A rotating assembly is provided on the side of the first sliding plate (10) that is relatively far away from the fixed base (7). The second output shaft is used to drive the rotating assembly to rotate about the first axis.

6. The test apparatus for simulating the load at the hub of a wind turbine generator according to claim 5, characterized in that, The rotating assembly includes a first gear (14) disposed on the second output shaft, the first gear (14) meshing with a second gear (15), the second gear (15) being disposed on the first sliding plate (10) and rotatable around the first axis.

7. The test apparatus for simulating loads at the hub of a wind turbine generator according to claim 6, characterized in that, The rotating assembly further includes a first rotating plate (16), which is disposed on the side of the second gear (15) that is relatively away from the first sliding plate (10).

8. The test apparatus for simulating loads at the hub of a wind turbine generator according to claim 7, characterized in that, The clamping assembly includes a second telescopic member (17) disposed on the slider (11), the second telescopic member (17) being extendable and retractable along the first direction, and a clamping member (18) disposed on the second telescopic member (17), the clamping member (18) having the clamping end (12).

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