Dynamic load testing device and static load testing device for safety piece of wind power cabin cover

Abstract

The utility model provides a dynamic load test device and a static load test device of a wind power cabin cover safety member, comprising a support tool, a test product, a dynamic load test assembly and a static load test assembly, the test product is fixed on the support tool, and the dynamic load test assembly and the static load test assembly are arranged on the support tool. The weight or the traction equipment is connected with the safety piece through the steel wire rope to simulate and load dynamic tension or static tension, the tension sensor or the tension meter is used for adjusting loading force to ensure that the tension borne by the safety piece reaches a preset value, the pulley block is used for adjusting the direction of the force so as to load the force, and meanwhile, the test result is not influenced. Real and accurate simulation test can be realized in a limited field, the operation is simple, the safety is high, and whether the product and the internal and external structures and material states of the safety piece meet the safety standard is judged by detecting and detecting the product and the internal and external structures and material states of the safety piece under the action of certain static or dynamic tension, so that the optimal structure size of the product is determined.

Description

Technical Field

[0001] This utility model belongs to the field of strength testing of wind turbine components, specifically relating to a dynamic load testing device and a static load testing device for a wind turbine nacelle cover safety component. Background Technology

[0002] During the assembly and subsequent maintenance of wind turbine units, maintenance personnel need to go inside and outside the nacelle to assemble the units or perform maintenance on the units after assembly. Anchor points (safety lugs) are installed on the top inside the nacelle, and safety railings and other safety components are installed on the outer top of the nacelle to ensure the personal safety of operators during assembly and subsequent maintenance. To ensure that the safety components have sufficient safety performance, the thickness of the product at the locations where safety lugs and safety railings are installed is increased during the production of the nacelle, as are the number of fasteners connecting the safety components to the nacelle and the thickness of the safety components' sheet metal. This increases the production cost of the nacelle. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a dynamic load testing device and a static load testing device for the safety components of the wind turbine nacelle cover. The device performs dynamic and static load tests on the safety components on the nacelle cover to determine whether the product can meet the safety performance requirements, thereby determining the optimal structure and size of the product, and reducing production costs while ensuring product quality. The testing device has a simple structure, is suitable for dynamic and static load testing of various products, and has a wide range of applications.

[0004] To achieve the above and other related objectives, this utility model proposes a dynamic load testing device for a wind turbine nacelle cover safety component, comprising:

[0005] Support fixtures;

[0006] The test product is fixed to the support fixture, and the first test piece is located above the test product;

[0007] Dynamic load testing components include:

[0008] Weights;

[0009] The first pulley assembly is installed on the support fixture and located on the outside of the test product;

[0010] A first steel wire rope, one end of which is connected to the first test piece and the other end of which is connected to the weight;

[0011] A tension sensor is disposed between the first test piece and the first pulley group and connected in series with the first wire rope;

[0012] When the weight is in a free state, one end of the first steel wire rope is horizontally connected to the first test piece, and the other end is routed through the first pulley group to the outside of the test product and vertically connected to the weight, and the bottom height of the weight is higher than the bottom height of the support fixture.

[0013] According to an embodiment of the present invention, a set of dynamic load testing components is respectively provided at each connection point between the first test piece and the test product.

[0014] According to one embodiment of the present invention, the tension sensor is disposed at one end of the first steel wire rope near the first test piece, and is connected to a data receiving device through a sensing line to obtain tension data.

[0015] According to an embodiment of the present invention, the weight is connected and fixed to an external device via a release device in the initial state of the test, and the weight is released by the release device during the test to achieve its free fall motion.

[0016] According to one embodiment of the present invention, the first pulley group is disposed at one end of the support fixture near the first test piece, and its height is consistent with the height of the test product.

[0017] According to one embodiment of the present invention, the mass of the weight is adjusted according to the tensile force data.

[0018] This utility model also proposes a static load testing device for a wind turbine nacelle cover safety component, comprising:

[0019] Support fixtures;

[0020] The test product is fixed to the support fixture, and the second test piece is located below the test product;

[0021] Static load test components include:

[0022] Traction equipment;

[0023] The second pulley block is installed on the supporting fixture;

[0024] The second steel wire rope has one end vertically connected to the second test piece, and the other end is wound around to the outside of the test product through the second pulley group and connected to the traction device.

[0025] A tensile testing device is connected in series with the second wire rope to measure its tensile force;

[0026] The traction device pulls the second steel wire rope and applies a vertically downward pulling force to the second test piece through the second pulley group.

[0027] According to an embodiment of the present invention, the second pulley group includes a first pulley, a second pulley, and a third pulley arranged sequentially along the length direction of the test product;

[0028] The first pulley is positioned below the second test piece and connected to the support fixture;

[0029] The second pulley is located in the lower region of the end of the test product and is connected to the support fixture;

[0030] The third pulley is disposed at one end of the support fixture and located on the outside of the test product;

[0031] One end of the second wire rope is connected to the second test piece, and passes sequentially around the bottom of the first pulley and the second pulley and the top of the third pulley, while the other end is connected to the traction device.

[0032] According to an embodiment of the present invention, a set of static load test components is respectively provided at each connection point between the second test piece and the test product.

[0033] According to one embodiment of the present invention, the tension detection device is disposed between the third pulley and the traction device, and is connected in series with the second wire rope.

[0034] This utility model discloses a dynamic and static load testing device for the safety components of a wind turbine nacelle. It utilizes the free fall of weights to simulate the free fall of a person and a traction device to apply tension to simulate the weight of a person. This simulates the dynamic and static tension forces experienced by the safety components during actual operation. By inspecting the internal and external materials and structures of the tested product and safety components after stress, the device can determine whether the product's safety performance meets standards, thereby determining the dimensions of products that meet safety performance requirements and reducing production costs. A pulley system is used to change the direction of the tension force, ensuring the test direction is consistent with site requirements and facilitating external force loading. Changing the direction of the loading force does not affect the test results. Data detection and collection are achieved through tension sensors and force gauges, ensuring that the tension force on the safety components reaches the preset value, thus achieving accurate and reliable testing. The device has a simple structure, is easy to operate, and has high safety, making it suitable for testing various products. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the dynamic load testing device for the wind turbine nacelle cover safety component in one embodiment of this utility model;

[0037] Figure 2 A schematic diagram of the static load testing device for the wind turbine nacelle cover safety component in one embodiment of this utility model.

[0038] Label Explanation:

[0039] 100. Support fixtures; 200. Test products; 300. Dynamic load test kits; 400. Static load test kits;

[0040] 210. First device under test; 220. Second device under test;

[0041] 310. Weights; 320. First pulley system; 330. First wire rope; 340. Tension sensor; 350. Sensor wire; 360. Data receiving device;

[0042] 410. Second pulley block; 420. Second wire rope; 430. Force gauge;

[0043] 411. First pulley; 412. Second pulley; 413. Third pulley. Detailed Implementation

[0044] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0045] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] Safety components such as safety lugs and safety railings are installed on the top of the inner and outer sides of the wind turbine nacelle to provide safety for workers when maintaining the wind turbine. To ensure that the safety components have sufficient safety performance, the strength is guaranteed by increasing the thickness of the safety components and connecting parts and increasing the number of connecting fasteners during the product manufacturing process, thereby increasing the product manufacturing cost.

[0047] Please see Figures 1 to 2This utility model, under existing technology and equipment conditions, proposes a dynamic load testing device and a static load testing device for the safety components of a wind turbine nacelle cover. This can improve the safety quality of wind power products, ensure personnel safety, and reduce product manufacturing costs. The dynamic load testing device includes a support fixture 100, a test product 200, and a dynamic load testing assembly 300. The static load testing device includes the support fixture 100, the test product 200, and a static load testing assembly 400. The test product 200 is fixed to the support fixture 100. The two testing devices are used to apply dynamic and static tensile forces to the safety components on the test product 200, respectively, and the quality status of the product and the safety components is detected to determine whether they meet safety performance requirements. It should be noted that, according to actual work requirements, dynamic load testing is generally used to test the external safety components of the product, such as safety railings and anchor points (safety lugs), while static load testing is mainly used to test the internal safety lugs of the product. By using both testing devices, the safety performance of various internal and external safety components of the product can be comprehensively tested, ensuring that the product meets the safety performance requirements while determining the optimal thickness and connection structure of the product and safety components, thereby reducing production costs.

[0048] Please see Figure 1 This utility model proposes a dynamic load testing device for a wind turbine nacelle cover safety component, which includes a support fixture 100, a test product 200, and a dynamic load testing component 300. The test product 200 is the nacelle cover, which is fixed to the support fixture 100. The first test component 210 is located above the test product 200, that is, outside the nacelle cover. The first test component 210 is, for example, a safety railing. The dynamic load testing component 300 includes a weight 310, a first pulley block 320, a first steel wire rope 330, and a tension sensor 340, which are used to simulate the dynamic load on the first test component 210.

[0049] Specifically, one end of the first steel wire rope 330 is connected to the first test piece 210, and the other end is connected to the weight 310. The dynamic tension of the first steel wire rope 330 on the first test piece 210 when the weight 310 falls freely is used to simulate the dynamic tension of the steel wire rope on the safety component when a worker falls from a certain height. A tension sensor 340 is installed between the first test piece 210 and the first pulley group 320 and connected in series with the first steel wire rope 330. The tension sensor 340 acquires tension data to control and achieve accurate simulation. Then, the appearance of the product and the safety component are observed and inspected, and the internal structure is probed to determine whether its safety performance meets the standards. The first pulley group... The weight 320 is installed on the support fixture 100 and located outside the test product 200. It is used to adjust the direction of the force without affecting the test results. When the weight 310 is in a free state, one end of the first wire rope 330 is horizontally connected to the first test piece 210, which can accurately simulate the pulling force of the human body on the safety piece in actual conditions. The other end of the first wire rope 330 passes around the first pulley group 320 and is vertically connected to the weight 310. The bottom surface of the weight 310 is higher than the bottom surface of the support fixture 100, so that the weight 310 can be freely dropped smoothly, ensuring the accuracy of the test and preventing damage to the test product or test device, and ensuring the safety of the operator.

[0050] Please see Figure 1 According to one embodiment of this utility model, the support fixture 100 is a support frame, which can be, for example, an integrally welded high-strength steel frame. The structure of the support frame is designed and manufactured according to the structure of the test product 200. The test product 200 is placed on the support frame and fixed to the support frame by, for example, bolts. The support fixture 100 is fixed to the ground at each foot of the support frame using expansion bolts to ensure the overall connection strength of the device. The test product 200 is installed and fixed on the support frame. Pulley groups are provided on the extensions at both ends of the support frame to adjust the force direction to simulate the free fall of the weight 310, realizing dynamic load testing. The pulley groups are far away from the test product 200, and the weight 310 falls in an area far away from the test product 200 to prevent damage to the test product 200 and the support fixture 100.

[0051] Please see Figure 1According to one embodiment of the present invention, the weight 310 is connected to the first test piece 210 via a first steel wire rope 330, simulating the connection between a human body and a safety component via the first steel wire rope 330. The tension of the first steel wire rope 330 on the first test piece 210 when the weight 310 falls freely is used to simulate the tension of the first steel wire rope 330 on the safety component when a person falls from a certain height. The tension sensor 340 is located at the end of the first steel wire rope 330 near the first test piece 210 and is connected to a data receiving device 360 ​​via a sensor line 350 to obtain tension data. The data receiving device 360 ​​can be, for example, a computer, and can receive and display the detection data of the tension sensor 340 in real time for analysis to determine whether the safety component meets the safety performance requirements.

[0052] Understandably, during dynamic load testing, it is necessary to ensure that the dynamic tension on the first test component 210 is the same as the dynamic tension under actual conditions. That is, the tension data of the tension sensor 340 should reach the first preset value. This first preset value is determined based on the maximum tension on the safety component under actual conditions and in combination with the actual test environment and device structure. The tension sensor 340 is used to detect the tension of the first wire rope 330 during the test to ensure that it is not less than the first preset value, thereby achieving accurate dynamic load testing and ensuring the stability and reliability of product quality.

[0053] It should be noted that, in order to ensure that the operation of the tension sensor 340 is not affected, the two ends of the tension sensor 340 must not touch the first test piece 210 and the first pulley group 320 during the test. At the same time, the tension sensor 340 should be as close as possible to the first test piece 210 to better reflect the actual situation.

[0054] Please see Figure 1 According to one embodiment of this utility model, when the weight 310 is in a free state, its bottom surface height should be higher than the bottom surface height of the supporting fixture 100. For example, the weight 310 should be about 100mm off the ground in a free state to ensure the accuracy of the tension force on the first test piece 210 when it falls. The mass of the weight 310 is adjusted according to the tension data measured by the tension sensor and determined after certain experimental tests. It is understood that due to the limited experimental testing field and the limited height of the free fall of the weight 310, the weight of the weight 310 is not the same as the weight of the staff in actual conditions. To achieve accurate tension simulation, the mass of the weight 310 needs to be calculated, tested and adjusted. Specifically, the tension data of the tension sensor 340 during the free fall of the weight 310 is obtained by computer, and the mass of the weight 310 is adjusted according to the tension data to ensure that its maximum tension reaches the first preset value. Under this maximum tension, the first test piece 210 is tested and its internal and external materials and structure are observed to determine whether the product structure meets the safety performance standards.

[0055] Please see Figure 1 According to one embodiment of this utility model, the weight 310 is connected and fixed to an external device via a release device in the initial test state. During the test, the release device is used to release the weight 310 to achieve its free fall motion. Specifically, for example, during the test, the weight 310 is first connected to the release device, the release device is lifted to a certain height by a crane, and personnel at a safe distance pull the safety buckle on the anti-disengagement hook via a pull rope to allow the weight 310 to fall freely for experimental testing.

[0056] Please see Figure 1 According to one embodiment of this utility model, a first steel wire rope 330 connects the first test piece 210, the weight 310, and the tension sensor 340, and passes around the first pulley group 320 to change the direction of the force in order to achieve safe and effective testing. Specifically, to facilitate the connection of the first steel wire rope 330 with other components, the first steel wire rope 330 is cut into different lengths according to the distance between the support fixture 100, the test product 200, the first test piece 210, and the first pulley group 320, with both ends looped and fixed with clamps. In addition, when connecting with components or testing instruments, U-shaped rings can be used for connection.

[0057] Please see Figure 1 According to an embodiment of this utility model, the first pulley group 320 is disposed at one end of the support fixture 100 near the first test piece 210, and its height is consistent with the height of the test product 200. Specifically, the first pulley group 320 can be, for example, a fixed pulley, which is installed at one end of the support frame, located outside the test product 200 and at a certain distance from one end of the test product 200. The height of the fixed pulley is basically consistent with the top height of the test product 200, so that the tension on one end of the first test piece 210 during the test is basically horizontal, which conforms to... In actual conditions, the direction of the tension force on the safety component is such that the weight 310 will not cause any other damage to the test product 200 when it falls freely; there is also a limiting component above the fixed pulley. Before the test experiment, the two ends of the first steel wire rope 330 are connected to the test product and the weight 310 respectively, and the middle part of the first steel wire rope 330 passes around the limiting component and is located between the fixed pulley and the limiting component. Thus, when the weight 310 falls freely, the first steel wire rope 330 can pass around the top of the fixed pulley and be stably connected to the fixed pulley. The direction of the force is adjusted by the fixed pulley to realize the dynamic load test.

[0058] Please see Figure 1 According to an embodiment of the present invention, a set of dynamic load test components 300 are respectively provided at each connection point between the first test piece 210 and the test product 200 to realize dynamic load testing at each connection point and ensure the overall safety performance of the product.

[0059] Please see Figure 1Before the dynamic load test, the support fixture 100 is first fixed to the bottom surface, and the test product 200 is installed and fixed on the support fixture 100. The length of each section of the first steel wire rope 330 is determined according to the overall structure and connected to the weight 310, the first test piece 210, and the tension sensor 340 respectively. The first steel wire rope 330 passes around the limiting piece on the first pulley group 320 in the middle and is located between the pulley and the limiting piece. The weight 310 connected to the release device is lifted to a specified height using a crane. The tester pulls the safety buckle on the anti-release hook from a safe distance via the pull rope, causing the weight 310 to fall freely for the test. The tension sensor 340 transmits the tension data to the computer to collect the falling weight 310 data. The tensile force on the first test component 210 is analyzed, and the mass of the weight 310 is adjusted to achieve the preset tensile force value. This accurately simulates the tensile force when a person falls from a certain height, thus meeting the product's safety performance requirements. After the test, the appearance of the first test component 210 (i.e., the safety component) and the test product 200 are observed and inspected. The safety component is checked for deformation, peeling of the surface anti-corrosion layer, and cracks in the welds. If necessary, an internal detector is used to check for internal cracks to avoid affecting its safety performance. The test product 200 is also observed for deformation, cracks, and other defects. If none of the above problems are found, the safety performance is considered to meet the standards. Dynamic load tests are performed on the connection points between each safety component and the test product 200 under the same configuration. The appearance and internal condition of the safety components and the test product 200 after the tests are observed and inspected to determine whether the overall product meets the safety requirements.

[0060] Please see Figure 2This utility model also proposes a static load testing device for a wind turbine nacelle cover safety component, which includes a support fixture 100, a test product 200, and a static load testing assembly 400. The test product 200, i.e., the nacelle cover, is fixed on the support fixture 100. The second test piece 220 is located below the test product 200, i.e., inside the nacelle cover. The static load testing assembly 400 includes a traction device, a second pulley block 410, a second wire rope 420, and a tensile testing device, such as a tensile gauge 430. The traction device (not shown in the figure) is used to provide external loading force, and the traction device can be, for example, a forklift or a crane. In the static load testing device, the second pulley block 410 is mounted on the support fixture 100 to change the direction of the force without affecting the test results, facilitating the traction equipment to provide external traction force for simulation. One end of the second steel wire rope 420 is vertically connected to the second test piece 220, and the other end is routed through the second pulley block 410 to the outside of the test product 200 and connected to the traction equipment. A tension gauge 430 is connected in series with the second steel wire rope 420 to measure its tension. The traction equipment pulls the second steel wire rope 420 and applies a vertically downward tension to the second test piece 220 through the second pulley block 410, ensuring the realism and accuracy of the force simulation of the safety component. It should be noted that the connection method between the second steel wire rope 420 and other components in the static load testing device is similar to the structure in the dynamic load testing device.

[0061] Please see Figure 2 According to an embodiment of the present invention, the second pulley group 410 includes a first pulley 411, a second pulley 412, and a third pulley 413 arranged sequentially along the length of the test product 200, each of which is a fixed pulley. The first pulley 411 is located below the second test piece 220 and connected to the support fixture 100. The second pulley 412 is located in the lower region of the end of the test product 200 and connected to the support fixture 100. The third pulley 413 is located at one end of the support fixture 100 and is located outside the test product 200. One end of the second steel wire rope 420 is connected to the second test piece 220 and passes sequentially around the lower part of the first pulley 411 and the second pulley 412 and the upper part of the third pulley 413. The other end is connected to the traction device. Thus, when the traction device pulls the second steel wire rope 420, the end connected to the second test piece 220 can pull down the safety component, simulating the pulling force of a person on the safety component in actual work. Of course, in other embodiments, the arrangement of the second pulley group 410 can also be varied, as long as the magnitude and direction of the tension force on one end of the second safety member are accurate during the test.

[0062] Please see Figure 2According to one embodiment of this utility model, a tension detection device is disposed between the third pulley 413 and the traction device, and connected in series with the second steel wire rope 420. The tension detection device, such as a tension gauge 430, is used to detect the tension force on the second test piece 220. It is understood that since the static tension force on the safety component is approximately equal to the weight of a human body, a second preset value is determined based on the device structure and the actual weight of the human body during work. The traction device pulls the second steel wire rope 420 and causes the tension gauge 430 to reach the second preset value, thus achieving accurate simulation. For ease of measurement and observation, the tension gauge 430 is disposed between the third pulley 413 and the traction device. Under the action of the pulley, the magnitude and direction of the tension force on the second test piece 220 can be ensured to be accurate, thereby achieving accurate and realistic simulation testing. In other embodiments, the tension detection device can also be a sensor, which is connected to an external data receiving device to measure and observe the tension data, ensuring that the tension value reaches the second preset value.

[0063] Please see Figure 2 According to an embodiment of the present invention, a set of static load test components 400 are respectively provided at each connection point between the second test piece 220 and the test product 200 to realize dynamic load testing at each connection point and ensure the overall safety performance of the product.

[0064] Please see Figure 2 Before the static load test, ensure that the support fixture 100 is fixed to the ground and that the connection between the test product 200 and the support fixture 100 is stable. Determine the length of the second wire rope 420 based on the overall structure. The connection method between the second wire rope 420 and each component is the same as the dynamic load test connection method. Securely connect the second wire rope 420 to the internal safety component of the second test piece 220, i.e., the engine compartment housing. Then, route it through multiple pulleys to the outside of the test product 200 and connect it in series with the tension gauge 430 or other tension testing device. The other end of the second wire rope 420 is connected to a forklift or overhead crane. During the test, slowly start the forklift or overhead crane. The reading on the tensile gauge 430 slowly increases until it reaches the weight to be tested. This tensile force is maintained for a certain period, such as more than 10 minutes, as a rescue time to fully ensure the product's safety performance. After the test, the appearance of the safety components and the test product 200 is observed and inspected. For the safety components, check for deformation, peeling of the surface anti-corrosion layer, and cracks in the welds. If necessary, use a detector to probe the interior to determine if internal cracks exist. Similarly, for the test product 200, observe for deformation, cracks, or other defects. If none of the above problems are found, the safety performance is considered to meet the standards. Similarly, a thorough static load test is performed on each connection point between the safety component and the test product 200. The appearance and internal condition of the safety components and the test product 200 after the test are observed and inspected to determine whether the overall product meets safety requirements.

[0065] In summary, the dynamic and static load testing devices for the wind turbine nacelle cover safety components of this utility model connect the weight 310 or traction equipment to the test component via a steel wire rope. The weight 310 simulates the dynamic tension on the safety component when a human body falls from a certain height, while the external traction equipment simulates the tension on the safety component. The tension detection device is connected in series with the steel wire rope to control the tension to reach a preset value, ensuring that the tension at one end of the test component under simulated conditions is the same in magnitude and direction as the actual tension, thus achieving a realistic and accurate simulation. Simultaneously, the steel wire rope passes through a pulley system, ensuring accurate force on the safety component while changing the direction of the tension at the external force loading end through the pulley system structure, facilitating the external force loading of the traction equipment, and allowing the weight 310 to fall in an area 200 meters away from the test product for easy control, ensuring the safety of the test. This allows for realistic and effective simulation in limited experimental spaces to achieve good test results, ensuring the safety performance of the product. The structure is simple, easy to operate, and highly safe.

[0066] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

[0067] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this utility model, the other technical features will not be described in detail here.

Claims

1. A dynamic load testing device for a wind turbine nacelle cover safety component, characterized in that, include: Support fixtures; The test product is fixed to the support fixture, and the first test piece is located above the test product; Dynamic load testing components include: Weights; The first pulley assembly is installed on the support fixture and located on the outside of the test product; A first steel wire rope, one end of which is connected to the first test piece and the other end of which is connected to the weight; A tension sensor is disposed between the first test piece and the first pulley group and connected in series with the first wire rope; When the weight is in a free state, one end of the first steel wire rope is horizontally connected to the first test piece, and the other end is routed through the first pulley group to the outside of the test product and vertically connected to the weight, and the bottom height of the weight is higher than the bottom height of the support fixture.

2. The dynamic load testing device for the safety component of the wind turbine nacelle as described in claim 1, characterized in that, Each connection point between the first test piece and the test product is provided with a set of dynamic load test components.

3. The dynamic load testing device for the safety components of the wind turbine nacelle cover according to claim 1, characterized in that, The tension sensor is positioned at the end of the first wire rope near the first test piece and is connected to a data receiving device via a sensor line to obtain tension data.

4. The dynamic load testing device for the safety component of the wind turbine nacelle as described in claim 1, characterized in that, The weight is connected and fixed to an external device via a release device in the initial state of the test. During the test, the release device is used to release the weight to achieve its free fall motion.

5. The dynamic load testing device for the safety component of the wind turbine nacelle as described in claim 1, characterized in that, The first pulley assembly is located at one end of the support fixture near the first test piece, and its height is consistent with the height of the test product.

6. The dynamic load testing device for the safety component of the wind turbine nacelle as described in claim 3, characterized in that, The mass of the weight is adjusted according to the tensile force data.

7. A static load testing device for a wind turbine nacelle cover safety component, characterized in that, include: Support fixtures; The test product is fixed to the support fixture, and the second test piece is located below the test product; Static load test components include: Traction equipment; The second pulley block is installed on the supporting fixture; The second steel wire rope has one end vertically connected to the second test piece, and the other end is wound around to the outside of the test product through the second pulley group and connected to the traction device. A tensile testing device is connected in series with the second wire rope to measure its tensile force; The traction device pulls the second steel wire rope and applies a vertically downward pulling force to the second test piece through the second pulley group.

8. The static load testing device for the safety component of the wind turbine nacelle as described in claim 7, characterized in that, The second pulley assembly includes a first pulley, a second pulley, and a third pulley arranged sequentially along the length of the test product; The first pulley is positioned below the second test piece and connected to the support fixture; The second pulley is located in the lower region of the end of the test product and is connected to the support fixture; The third pulley is disposed at one end of the support fixture and located on the outside of the test product; One end of the second wire rope is connected to the second test piece, and passes sequentially around the bottom of the first pulley and the second pulley and the top of the third pulley, while the other end is connected to the traction device.

9. The static load testing device for the safety component of the wind turbine nacelle as described in claim 7, characterized in that, Each connection point between the second test piece and the test product is provided with a set of static load test components.

10. The static load testing device for the safety component of the wind turbine nacelle cover according to claim 8, characterized in that, The tensile testing device is located between the third pulley and the traction device, and is connected in series with the second wire rope.

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