A wind turbine nacelle strength testing device

Abstract

This invention relates to the field of generator nacelle strength testing technology, specifically to a wind turbine nacelle strength testing device, comprising: a lifting base and a limiting base; the lifting base is provided with a first connecting mechanism connected to the bottom port of the nacelle; a limiting head is inserted into the limiting base, and the limiting head is provided with a second connecting mechanism connected to the side port of the nacelle; after the second connecting mechanism completes the connection, the lifting base performs an axial upward movement, causing the limiting head to disengage from the limiting base and complete the docking of the first connecting mechanism. This invention uses a first limiting block to radially limit and fix the port, and uses a second limiting block and base to axially limit and fix the nacelle, thereby simulating the connection state of fasteners fixing the nacelle. Furthermore, during the entire connection process, with the cooperation of the limiting head and the limiting base, the first connecting mechanism can quickly disengage from the limiting base or stably place itself on the limiting base as the lifting base rises and falls.

Description

Technical Field

[0001] This invention relates to the field of generator nacelle strength testing technology, specifically to a wind turbine nacelle strength testing device. Background Technology

[0002] As a crucial component of renewable energy, wind turbine generators place extremely high demands on the strength and reliability of their structural components during long-term operation. Among these components, the nacelle cover not only protects internal equipment, provides wind and water resistance, and reduces noise, but also must withstand the combined effects of wind loads, vibrations, and environmental temperature variations. Therefore, structural strength testing of the nacelle cover is a critical step in the quality control and safety assessment of wind power equipment.

[0003] Currently, strength testing of wind turbine nacelles typically involves load testing under simulated installation conditions to assess their stress deformation and overall structural performance. However, due to the large size and weight of the nacelle, and the fact that most existing testing equipment uses a method of mounting the bottom port of the nacelle on a simulated flange platform to simulate the connection between the nacelle and the top of the tower, relying on manual installation of numerous fasteners for securing the connection, the entire testing process is time-consuming, labor-intensive, and inconvenient. Furthermore, to further improve the reliability of the test results, a simulated flange connection to the side port of the nacelle is added to simulate the connection between the nacelle and the fairing, which further reduces the convenience of the testing process and severely restricts the overall efficiency of the testing procedure.

[0004] Therefore, there is an urgent need for a testing device that is structurally sound, efficiently installed, and capable of fully simulating the actual working environment of the nacelle cover, in order to meet the rapid, efficient, and high-intensity testing requirements of wind power equipment. Summary of the Invention

[0005] This invention provides a wind turbine nacelle strength testing device to solve the problems of time-consuming, labor-intensive, and inconvenient processes in simulating the connection between the bottom and side ports of the nacelle in related technologies, which seriously restrict the overall efficiency of the testing process.

[0006] This invention provides a wind turbine nacelle strength testing device, comprising: a lifting base and a limiting base; the lifting base is provided with a first connecting mechanism connected to the bottom port of the nacelle; a limiting head is inserted on the limiting base, and the limiting head and the limiting base form a wedge-shaped fit in the front, back, left, and right directions, so that when the limiting head moves up, it quickly forms a gap and disengages from the limitation of the limiting base; the limiting head is provided with a second connecting mechanism connected to the side port of the nacelle; both the first and second connecting mechanisms include: a base, a pressing component, a control component, and a conveying mechanism; the base is provided with a plurality of first limiting blocks that slide radially and are distributed in a circular array; the pressing component is axially slidably connected to the base and is provided with a plurality of second limiting blocks that slide radially, the plurality of second limiting blocks being distributed in a circular array and limiting and fixing the nacelle from the inside of the port; the control component is disposed between the base and the pressing component, and when the pressing component moves toward the base, it controls the first and second limiting blocks to slide radially and extend; the conveying mechanism is located on the left side of the second connecting structure and is used to feed the nacelle. After the lifting platform completes the connection with the second connecting mechanism, it performs an axial upward movement, causing the nacelle cover to disengage from the conveying mechanism, the limiting head to disengage from the limiting seat, and the docking of the first connecting mechanism to be completed. After that, the strength of the nacelle cover is tested.

[0007] In one possible implementation, a sliding seat is provided between the second limiting block and the clamping assembly. The second limiting block is radially slidably connected to the clamping assembly through the sliding seat, and the second limiting block is slidably connected to the sliding seat along the axial direction of the clamping assembly. During the clamping and fixing process of the clamping assembly, the second limiting block directly applies the clamping force of the clamping assembly to the nacelle cover.

[0008] In one possible implementation, the control component includes: a first side pusher and a second side pusher; the first side pusher is mounted on the base and corresponds one-to-one with the second limiting block, and is used to cause the second limiting block to extend outward to a preset position and then stop moving during the movement of the pressing component toward the base; the second side pusher is mounted on the pressing component and corresponds one-to-one with the first limiting block, and is used to cause the first limiting block to extend outward and press against the base and then stop moving during the movement of the pressing component toward the base.

[0009] In one possible implementation, the base is provided with a wedge-shaped reinforcing block, and the limiting seat is provided with a wedge-shaped seat that cooperates with the wedge-shaped reinforcing block.

[0010] In one possible implementation, the first limiting block and the second limiting block of the circular array are alternately distributed in the circumferential direction.

[0011] In one possible implementation, the conveying mechanism includes symmetrically distributed tracks, on which slides are mounted, and on which a plurality of side limiting units are provided, the plurality of side limiting units being linearly distributed on the slides and limiting the cabin cover from both sides.

[0012] In one possible implementation, the side limiting unit includes a support frame with a limiting rod hinged to it, and a limiting post fixedly installed on the support frame to limit the rotation angle of the limiting rod.

[0013] In one possible implementation, the limiting seat is provided with wedge-shaped limiting grooves, and the limiting heads are symmetrically distributed and inserted into the wedge-shaped limiting grooves respectively.

[0014] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: The present invention uses a first limiting block to limit and fix the port in the radial direction, and uses a second limiting block and base to limit and fix the nacelle cover in the axial direction. This simulates the connection state of the fastener fixing the nacelle cover, effectively improving the speed, efficiency and automation of the connection between the first connecting mechanism, the second connecting mechanism and the corresponding port of the nacelle cover. In the whole connection process, with the cooperation of the limiting head and the limiting seat, the first connecting mechanism can quickly complete the process of detaching from the limiting seat or being stably placed on the limiting seat as the lifting seat rises and falls, fully simulating the actual working connection state of the nacelle cover, while ensuring that the entire testing process is stable and smooth, and effectively improving the overall efficiency, convenience and reliability of the testing process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a wind turbine nacelle strength testing device provided in an embodiment of the present invention.

[0016] Figure 2 This is a partial cross-sectional structural schematic diagram of a wind turbine nacelle strength testing device provided in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the second connection structure of a wind turbine nacelle strength testing device provided in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the first connection structure of a wind turbine nacelle strength testing device provided in an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the wedge-shaped limiting groove and the limiting head of a wind turbine nacelle strength testing device provided in an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the side limiting unit of a wind turbine nacelle strength testing device provided in an embodiment of the present invention.

[0021] Figure 7This is a schematic diagram illustrating the process by which the sliding seat of a wind turbine nacelle strength testing device, provided in an embodiment of the present invention, drives the second limiting block to slide radially outward along the pressing plate.

[0022] In the diagram: 1. Cabin cover; 2. Lifting seat; 3. Limiting seat; 4. Limiting head; 5. Base; 6. First limiting block; 7. Pressing assembly; 71. Pressing plate; 72. Center column; 8. Second limiting block; 9. Control assembly; 91. Side pusher one; 911. First rack; 912. Second rack; 913. Gear; 92. Side pusher two; 921. Limiting wheel; 922. Connecting seat; 10. Conveying mechanism; 101. Track; 102. Slide seat; 103. Side limiting unit; 113. Support frame; 123. Limiting rod; 133. Limiting column; 11. Sliding seat; 12. Wedge-shaped reinforcing block; 13. Wedge-shaped seat; 14. Wedge-shaped limiting groove. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Please see Figure 1 , Figure 2 and Figure 3 A wind turbine nacelle strength testing device includes a conveying mechanism 10, a limiting seat 3, and a lifting seat 2 equipped with a first connecting mechanism. The limiting seat 3 is equipped with a limiting head 4, and the limiting head 4 is equipped with a second connecting mechanism. The second connecting mechanism is connected to the side port of the nacelle 1 to simulate the connection and installation state between the nacelle 1 and the fairing. The first connecting mechanism is connected to the bottom port of the nacelle 1 to simulate the connection and installation state between the nacelle 1 and the top of the tower. After both the side port and the bottom port of the nacelle 1 are in the simulated connection and installation state, the working environment of the nacelle 1 is simulated by an existing testing system (the testing equipment includes the testing system, which is existing technology and will not be described in detail here), which effectively improves the reliability of the test results.

[0025] See Figure 1 , Figure 2 and Figure 3The conveying mechanism 10 is located on the left side of the second connecting structure and is used to feed the nacelle cover 1 from left to right, so that the nacelle cover 1 enters the connection and installation station. Then, the second connecting mechanism first connects to the port on the right side of the nacelle cover 1. Then, the lifting seat 2 rises, so that the second connecting mechanism enters the connection and installation station. At the same time, the nacelle cover 1 is separated from the conveying mechanism 10 and the limiting head 4 is separated from the limiting seat 3. Meanwhile, the first connecting mechanism is connected to the port at the bottom of the nacelle cover 1. At this time, the second connecting mechanism is freed from the restriction of the limiting seat 3, which fully simulates the connection and installation state of the nacelle cover 1 and the guide fairing, and avoids the limiting seat 3 from affecting the reliability of the test results.

[0026] See Figure 1 and Figure 5 The limiting head 4 and the limiting seat 3 form a wedge-shaped fit in the front, back, left, and right directions; for example Figure 1 As shown, wedge-shaped limiting grooves 14 are provided on the front and rear of the limiting seat 3, and the limiting heads 4 are symmetrically distributed front and rear and respectively inserted into the wedge-shaped limiting grooves 14; during the rising process of the lifting seat 2, only a small lifting distance is needed to allow the cabin cover 1 to disengage from the conveying mechanism 10 and the limiting heads 4 to disengage from the limiting seat 3; as Figure 5 As shown, the left and right sides of the limiting head 4 and the wedge-shaped limiting groove 14 are in a wedge-shaped engagement state. The limiting head 4 only needs to move upward a small distance to quickly create a gap and break free from the limitation of the limiting seat 3. This prevents the limiting seat 3 from exerting a limiting force on the nacelle cover 1 during the testing process, which would affect the reliability of the test results. After the limiting head 4 moves downward and resets, the second connecting mechanism can be stably placed, improving the convenience and stability of the testing process. The front and rear sides of the limiting head 4 and the wedge-shaped limiting groove 14 are also wedge-shaped, which will not be elaborated further here. The wedge-shaped engagement of the limiting head 4 and the wedge-shaped limiting groove 14 is generally conducive to the rapid completion of the simulated connection of the nacelle cover 1 and fully simulates the actual installation connection and working state of the nacelle cover 1. At the same time, it facilitates quick and stable reset and release of the simulated connection state. The entire testing process is fast, convenient, and highly automated, which greatly improves the efficiency of the testing process and the reliability of the test results.

[0027] See Figure 2 , Figure 3 , Figure 4 and Figure 7Both the first and second connecting mechanisms include a base 5 with a plurality of first limiting blocks 6 arranged in a circular array and a pressing assembly 7 with a plurality of second limiting blocks 8 arranged in a circular array. The first limiting blocks 6 and the second limiting blocks 8 are arranged in a circular array and alternately distributed in the circumferential direction. The pressing assembly 7 includes a pressing plate 71 and a central column 72. The central column 72 is axially slidably connected to the corresponding base 5. The diameter of the pressing plate 71 is smaller than the diameter of the port of the cabin cover 1. The second limiting blocks 8 are slidably mounted on the pressing plate 71 along the radial direction. The base 5 is a circular structure and its diameter is larger than the diameter of the port of the cabin cover 1. The first limiting blocks 6 are slidably mounted on the base 5 along the radial direction. The base 5 and the pressing plate 71 are coaxially distributed. The symmetrical limiting heads 4 are all fixedly connected to the base 5 in the first connecting mechanism. The conveying mechanism 10 feeds to the left. When the nacelle cover 1 is connected to the installation station, the clamping plate 71 in the second connection mechanism is located inside the nacelle cover 1, and the right end face of the nacelle cover 1 abuts against the base 5 in the second connection mechanism. At this time, the central column 72 in the second connection mechanism is moved to the right by the existing drive source, so that the clamping plate 71 is clamped and fixed to the nacelle cover 1 by the second limiting block 8. During this process, the second limiting block 8 first extends outward along the radial direction of the clamping plate 71 and then abuts against the inner wall of the nacelle cover 1 as the clamping plate 71 moves, clamping and fixing the nacelle cover 1 to the base 5. This simulates the axial limiting state generated when the fastener is fastened. At the same time, the first limiting block 6 extends outward and abuts against the inner wall of the right port of the nacelle cover 1 from the inside. This simulates the radial limiting state generated when the fastener is fastened, further simulating the actual connection and fixing state of the nacelle cover 1. The connection process is quick and convenient.

[0028] See Figure 1 and Figure 2 Both the front and rear sides of the base 5 are fixedly provided with wedge-shaped reinforcing blocks 12. The limiting seat 3 is provided with a wedge-shaped seat 13 that cooperates with the wedge-shaped reinforcing blocks 12. The wedge-shaped seat 13 and the wedge-shaped reinforcing blocks 12 cooperate to provide lateral support force for the base 5, improve the stability of the position of the base 5, and facilitate the stable abutment of the cabin cover 1 against the base 5. At the same time, it does not affect the rapid upward movement of the base 5 away from the limiting seat 3.

[0029] See Figure 2 , Figure 3 and Figure 4After the second connecting mechanism completes the connection, the lifting seat 2 moves upward, allowing the first connecting mechanism to enter the connection and installation position. In this state, the clamping plate 71 in the first connecting mechanism is located inside the nacelle cover 1. Then, the lifting seat 2 continues to move upward until the nacelle cover 1 is separated from the conveying mechanism 10 and stops moving. At this time, the nacelle cover 1 is located on the base 5 in the first connecting mechanism. Then, the central column 72 in the first connecting mechanism is controlled to move vertically downward through the existing drive source, so that the clamping plate 71 is pressed and fixed to the nacelle cover 1 by the second limit block 8. The specific connection and fixing process is the same as the connection and fixing process of the second connecting mechanism, which will not be described in detail here. At the same time that the nacelle cover 1 is separated from the conveying mechanism 10, the second connecting mechanism is separated from the limitation of the limit seat 3.

[0030] See Figure 2 , Figure 4 and Figure 7 A sliding seat 11 is provided between the second limiting block 8 and the pressing plate 71. The sliding seat 11 is slidably connected to the pressing plate 71 radially along the central column 72. The second limiting block 8 is slidably connected to the pressing plate 71 radially through the sliding seat 11 and is also slidably connected to the sliding seat 11 axially along the central column 72. During the pressing and fixing process of the pressing assembly 7, the second limiting block 8 directly applies the pressing force of the pressing assembly 7 to the cabin cover 1; Figure 4 and Figure 7 As shown, during the process of the clamping plate 71 moving towards the base 5 to clamp and fix the nacelle cover 1, the sliding seat 11 first slides outward to extend the second limiting block 8 outward, and then stops moving; then the second limiting block 8 abuts against the nacelle cover 1 and the clamping plate 71 as the clamping plate 71 continues to move, until the second limiting block 8 clamps and fixes the nacelle cover 1. At this time, the second limiting block 8 still has room to slide towards the clamping plate 71 on the sliding seat 11. Therefore, the sliding seat 11 will not be subjected to the clamping force of the clamping plate 71 in the axial direction, which is conducive to the stable and smooth extension and reset of the second limiting block 8, and thus helps to improve the stability and reliability of the continuous operation of the detection process.

[0031] See Figure 2 , Figure 3 , Figure 4 and Figure 7A control component 9 is provided between the base 5 and the clamping plate 71. During the process of the corresponding clamping component 7 moving towards the base 5 and clamping it in place, the control component 9 controls the first limiting block 6 and the second limiting block 8 to extend radially. Upon reset, it controls the first limiting block 6 and the second limiting block 8 to reset. This eliminates the need for additional drive components and has a simple structure. The control component 9 includes a first side pusher 91 and a second side pusher 92. The first side pusher 91 corresponds one-to-one with the second limiting block 8. The first side pusher 91 includes a first rack 911, a second rack 912, and a gear 913. The gear 913 meshes between the first rack 911 and the second rack 912 and is rotatably mounted on the clamping plate 7. On the 1st floor, the first rack 911 is fixedly mounted on the sliding seat 11, and the second rack 912 is fixedly mounted on the base 5. The first rack 911 and the second rack 912 are perpendicular to each other, and the second rack 912 includes a toothed area and a toothless area. During the movement of the pressure plate 71 toward the base 5, the gear 913, which moves with the pressure plate 71, first meshes with the toothed area of ​​the second rack 912, causing the first rack 911 to move outward. Correspondingly, the sliding seat 11 and the second limiting block 8 are controlled to move outward until the second limiting block 8 extends to the preset position. At this time, the gear 913 just moves to the position corresponding to the toothless area of ​​the second rack 912. After that, the gear 913 stops rotating, and the sliding seat 11 stops moving.

[0032] See Figure 3 The second side pusher 92 corresponds one-to-one with the first limiting block 6, and the second side pusher 92 includes a connecting seat 922 that is rotatably connected to the limiting wheel 921. The connecting seat 922 is fixedly installed on the pressure plate 71. The first limiting block 6 is provided with a limiting surface that contacts the limiting wheel 921. The limiting surface includes an inclined section and a vertical section. During the movement of the pressure plate 71 toward the base 5, the limiting wheel 921 first cooperates with the inclined section of the limiting surface to control the first limiting block 6 to slide outward along the radial direction of the pressure plate 71 and abut against the inner wall of the port of the cabin cover 1. Then the limiting wheel 921 moves along the vertical section to keep the first limiting block 6 in abutting state. An elastic reset member (not shown in the figure) is connected between the first limiting block 6 and the base 5. When the limiting wheel 921 moves upward and no longer cooperates with the limiting surface, the first limiting block 6 automatically resets under the action of the elastic reset member.

[0033] See Figure 1 , Figure 2 and Figure 6 The conveying mechanism 10 includes a track 101 symmetrically distributed front and rear. A slide block 102 is slidably mounted on the track 101. A number of side limiting units 103 are provided on the slide block 102. The side limiting units 103 are evenly distributed on the slide block 102 from left to right. The side limiting units 103 on the slide block 102 distributed front and rear limit the cabin cover 1 from the front and rear sides respectively, so that the cabin cover 1 faces the first connecting mechanism, which facilitates the quick and convenient connection between the cabin cover 1 and the first connecting mechanism.

[0034] See Figure 1 and Figure 6 The side limiting unit 103 includes a support frame 113, on which a limiting rod 123 is hinged. A spring (not shown in the figure) connects the limiting rod 123 to the support frame 113. A limiting post 133 for limiting the limiting rod 123 is fixedly installed on the support frame 113. In the initial state, the limiting rod 123 is tilted under the action of the spring. The limiting rods 123 on the symmetrical slides 102 are symmetrical to each other and form a large-diameter upward-facing trumpet-shaped structure. When the cabin canopy... During the process of hoisting and placing the 123 onto the conveying mechanism 10 using the existing hoisting mechanism, the limiting rod 123 rotates adaptively as the nacelle cover 1 moves downward. When the limiting rod 123 contacts the limiting post 133, the limiting rod 123 stops rotating due to the restriction of the limiting post 133. At this time, the tilt angle of the limiting rod 123 decreases and it remains pressed against the nacelle cover 1 under the elastic force of the spring. The limiting rod 123 limits the nacelle cover 1 from both sides, further improving the efficiency and convenience of the overall inspection process.

[0035] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A strength testing device for a wind turbine nacelle, characterized in that: include: The lifting platform is equipped with a first connecting mechanism that connects to the bottom port of the nacelle cover. A limiting seat is provided with a limiting head inserted on it. The limiting head and the limiting seat form a wedge-shaped fit in the front, back, left and right directions, so that when the limiting head moves up, it quickly forms a gap and gets out of the limitation of the limiting seat. The limiting head is provided with a second connecting mechanism that connects to the side port of the cabin cover. Both the first and second connecting mechanisms include: A base on which a plurality of first limiting blocks are arranged in a circular array and slide radially; The clamping assembly is axially slidably connected to the base and has multiple second limiting blocks that slide radially on it. The multiple second limiting blocks are distributed in a circular array and limit and fix the nacelle cover from the inside of the port. The control component is located between the base and the clamping component, and when the clamping component moves toward the base, it controls the first limit block and the second limit block to slide out radially in linkage. The conveying mechanism, located to the left of the second connecting mechanism, is used to feed the cabin cover; After the lifting platform completes the connection with the second connecting mechanism, it performs an axial upward movement, causing the nacelle cover to disengage from the conveying mechanism, the limiting head to disengage from the limiting seat, and the docking of the first connecting mechanism to be completed. After that, the strength of the nacelle cover is tested.

2. The wind turbine nacelle strength testing device according to claim 1, characterized in that: A sliding seat is provided between the second limiting block and the pressing assembly. The second limiting block is radially slidably connected to the pressing assembly through the sliding seat, and the second limiting block is slidably connected to the sliding seat along the axial direction of the pressing assembly. During the pressing and fixing process of the pressing assembly, the second limiting block directly applies the pressing force of the pressing assembly to the nacelle cover.

3. A wind turbine nacelle strength testing device according to claim 1 or 2, characterized in that: The control component includes: Side pusher 1 is installed on the base and corresponds one-to-one with the second limiting block. It is used to make the second limiting block extend outward to a preset position and then stop moving when the pressing component moves toward the base. Side pusher two is installed on the clamping assembly and corresponds one-to-one with the first limiting block. It is used to make the first limiting block extend outward and stop moving after pressing against the base as the clamping assembly moves towards the base.

4. The wind turbine nacelle strength testing equipment according to claim 1, characterized in that: The base is provided with a wedge-shaped reinforcing block, and the limiting seat is provided with a wedge-shaped seat that cooperates with the wedge-shaped reinforcing block.

5. The wind turbine nacelle strength testing device according to claim 1, characterized in that: The first limiting block and the second limiting block of the circular array are alternately distributed in the circumferential direction.

6. The wind turbine nacelle strength testing device according to claim 1, characterized in that: The conveying mechanism includes symmetrically distributed tracks, with slides mounted on the tracks. Several side limiting units are provided on the slides, and the side limiting units are linearly distributed on the slides and limit the cabin cover from both sides.

7. The wind turbine nacelle strength testing device according to claim 6, characterized in that: The side limiting unit includes a support frame, a limiting rod is hinged on the support frame, and a limiting post is fixedly installed on the support frame to limit the rotation angle of the limiting rod.

8. The wind turbine nacelle strength testing device according to claim 1, characterized in that: The limiting seat is symmetrically provided with wedge-shaped limiting grooves, and the limiting heads are symmetrically distributed and inserted into the wedge-shaped limiting grooves respectively.

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