A Static Load Deflection and Inclination Testing Device for Wind Turbine Blades and Its Testing Method

Abstract

The present invention provides a static load deflection inclination test device for a wind turbine blade and a test method thereof, relating to the technical field of wind turbine blade testing. It includes a base, on which a support frame is fixed. A rotating frame is rotatably fitted inside the support frame. A mounting seat is rotatably fitted on one side of the rotating frame. A wind turbine blade is installed on one side of the rotating frame, corresponding to the mounting seat. A support and limit structure is installed on the base. A first motor is installed on the support frame, corresponding to the rotating frame. A driving structure is installed on the rotating frame. The present invention is applicable to relatively long wind turbine blades, preventing the small space below the wind turbine blade from affecting the wind turbine blade, enabling the device to test wind turbine blades of most sizes, thereby expanding the application range of the device. And it can drive the wind turbine blade to vibrate by the reciprocating movement of the rotating frame, so as to conduct vibration testing and expand the vibration range of the device, so that the device can not only be applied to static load testing, improving the practicability of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade testing, and specifically provides a static load deflection and inclination testing device for wind turbine blades and a testing method thereof. Background Art

[0002] As a renewable resource, wind energy promotes the development of the wind power generation industry. Wind turbine blades are the core components in wind turbines that convert wind energy into electrical energy, and their design and manufacturing are crucial for wind power generation efficiency. The development of wind turbine blades has experienced an evolution from wood, metal to composite materials, and currently mainly uses reinforcing materials such as carbon fiber and glass fiber. These materials not only improve the strength and toughness of the blades but also meet the lightweight requirements to adapt to high-efficiency power generation under complex working conditions.

[0003] After the processing of wind turbine blades is completed, static load testing of the wind turbine blades is required to test the bending degree of the blades under specific acting forces and ensure that the blade structural strength meets the design requirements. As people's requirements for wind power and efficiency are getting higher and higher, the outer dimensions of the blades are getting larger and larger, and the deflection under the acting force is also getting larger and larger. Existing testing equipment requires a larger outer dimension to meet the requirements of the lifting distance, resulting in a smaller applicable range of the device and being unable to be applicable to most sized wind turbine blades.

[0004] Therefore, the present invention provides a static load deflection and inclination testing device for wind turbine blades and a testing method thereof. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a static load deflection and inclination testing device for wind turbine blades and a testing method thereof to solve the problems raised in the above background art. The present invention is applicable to longer wind turbine blades, preventing the small space below the wind turbine blade from affecting the wind turbine blade, enabling the device to test most sized wind turbine blades, thereby expanding the applicable range of the device, and can drive the wind turbine blade to vibrate through the reciprocating movement of the rotating frame to conduct vibration testing, expanding the vibration range of the device, so that the device can not only be applied to static load testing, improving the practicality of the device; the loading position can be adjusted according to the size of the wind turbine blade and the testing needs, improving the adaptability of the device, and the pressing test can be carried out through the pressing structure; the deflection change of the wind turbine blade can be detected according to the telescopic degree and displacement change of the telescopic rod, and two-point loading is used, so that the changes of the two telescopic rods can be compared to ensure the accuracy of the static load test of the wind turbine blade; there are multiple testing methods, improving the adaptability of the device.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: A static load deflection inclination testing device for a wind turbine blade and its testing method, including a base, a support frame is fixed on the base, a rotating frame is rotatably fitted inside the support frame, a mounting seat is rotatably fitted on one side of the rotating frame, a wind turbine blade is installed on one side of the rotating frame, the wind turbine blade corresponds to the mounting seat, a support and limit structure is installed on the base, a first motor is installed on the support frame, the first motor corresponds to the rotating frame, a driving structure is installed on the rotating frame, the driving structure corresponds to the mounting seat, a plurality of sliding frames are slidably fitted on the base, a pressing structure is installed on the sliding frame, the pressing structure includes a pressing frame, a plurality of first pressure sensors are installed on the pressing frame, a pulling-down structure is installed on the upper side of the pressing frame, a displacement monitoring structure is installed on the upper side of the pressing frame, the displacement monitoring structure corresponds to the pulling-down structure, the pulling-down structure includes a pressing block, a fixing rod is slidably fitted on the pressing block, the fixing rod corresponds to the wind turbine blade, a pressure detection structure is installed between the pressing block and the fixing rod, a telescopic rod is slidably fitted on the sliding frame, and the telescopic rod corresponds to the wind turbine blade.

[0007] Further, first rotating shafts are fixed on both sides of the rotating frame, the first rotating shafts are rotatably connected to the support frame, the output end of the first motor is fixedly connected to one of the first rotating shafts, the driving structure includes a second motor fixed on the support frame, the output end of the second motor is fixedly connected to a second rotating shaft, a first gear is fixed on the second rotating shaft, a third rotating shaft is rotatably fitted on the rotating frame, the third rotating shaft is fixedly connected to the mounting seat, and a second gear is fixed on the third rotating shaft, and the second gear meshes with the first gear.

[0008] Further, the support and limit structure includes a plurality of first hydraulic cylinders fixed on the base, the output ends of the first hydraulic cylinders are fixedly connected with push ball heads, the push ball heads are in contact with the rotating frame, and a plurality of support and limit plates are fixed inside the support frame, and the support and limit plates are located under the rotating frame.

[0009] Further, a plurality of electric slide rails are fixed on the base, the output ends of the plurality of electric slide rails are respectively fixedly connected with the plurality of sliding frames, a plurality of second hydraulic cylinders are fixed on the sliding frames, the output ends of the second hydraulic cylinders are fixedly connected with the pressing frame, the pressing frame is of a C-shaped structure, the wind turbine blade is located on the relative inner side of the pressing frame, and the first pressure sensors are fixed on the side of the pressing frame close to the wind turbine blade.

[0010] Further, a first sliding groove is formed on the sliding frame, a sliding block is fixed on the lower side of the telescopic rod, the sliding block corresponds to the first sliding groove, the telescopic rod includes a first rod body and a second rod body, the first rod body is slidably connected with the second rod body, the first rod body is fixedly connected with the sliding block, and a pressing ball head is fixed on the top of the second rod body, and the pressing ball head is in contact with the wind turbine blade.

[0011] Further, a second sliding groove is formed in the first rod body. The second sliding groove corresponds to the second rod body. A first spring is fixed in the second sliding groove and is fixedly connected to the second rod body. A first displacement sensor is installed in the second sliding groove. A second spring is fixed in the first sliding groove and is fixedly connected to the first rod body. A second displacement sensor is installed in the first sliding groove.

[0012] Further, the displacement monitoring structure includes a fixed block fixed on the pressing frame. A third displacement sensor is fixed on the fixed block. The pulling-down structure further includes a pulling rope. The pulling rope corresponds to the pressing block and is fixedly connected to the fixed block.

[0013] Further, a through groove is formed in the pressing block. The through groove corresponds to the pulling rope. A plurality of adhesive tapes are fixed on the fixing rod. The fixing rod is fixedly adhered to the wind power blade through the adhesive tapes. Third sliding grooves are formed on both sides of the fixing rod and correspond to the pressing block.

[0014] Further, a sliding rod is fixed on the pressing block. The sliding rod corresponds to the third sliding groove. The pressure detection structure includes a plurality of second pressure sensors fixed on the fixing rod. The second pressure sensors are in contact with the pressing block.

[0015] A test method for a static load deflection inclination test device of a wind power blade includes the following steps:

[0016] S1. Fix the wind power blade on the mounting seat. Rotate and adjust the angle of the rotating frame according to the size of the wind power blade. The rotating frame drives the wind power blade to rotate, and then support and fix the position of the rotating frame through the first hydraulic cylinder.

[0017] S2. Drive the sliding frame to slide to the loading position through the electric slide rail. Start the second hydraulic cylinder to drive the pressing frame to press down, and conduct a static load test through two-point loading.

[0018] S3. Press down the wind power blade to cause the wind power blade to deform and bend into a certain arc. The wind power blade presses down to push the telescopic rod. Detect the telescopic degree and moving distance of the telescopic rod through the first displacement sensor and the second displacement sensor, so as to judge the deflection change of the wind power blade.

[0019] S4. For a longer wind power blade, slide the pressing frame to the lower side of the wind power blade, tie the wind power blade with the pulling rope, the pressing block is in contact with the wind power blade, and then start the second hydraulic cylinder to drive the pulling rope to pull the pressing block to press down the wind power blade, and then the static load test of the wind power blade can be carried out.

[0020] S5. The bending of the wind power blade causes the pressing block to slide relatively. Detect the pressing force through the second pressure sensor, and detect the deflection change through the third displacement sensor and different second pressure sensors that are pressed.

[0021] S6. Start the second motor to drive the wind turbine blade to rotate, and perform a downward pressure test on different surfaces of the wind turbine blade.

[0022] Advantages of the present invention:

[0023] 1. Rotationally install a rotating frame inside the support frame, and rotatably set a mounting seat on one side of the rotating frame. The mounting seat can be rotated, so as to drive the wind turbine blade to rotate through the mounting seat, and thus the wind turbine blade can be turned over, so that the wind turbine blade can be tested at various angles. And no matter what angle it is, it is a downward pulling test, which is relatively simple to test. Moreover, the angle of the wind turbine blade can be adjusted by rotating the rotating frame, so that the wind turbine blade can be installed obliquely upward, thus making the device applicable to longer wind turbine blades, preventing the small space below the wind turbine blade from affecting the wind turbine blade, enabling the device to test wind turbine blades of most sizes, thereby expanding the applicable range of the device. And the rotating frame can drive the wind turbine blade to vibrate by making a reciprocating motion, so as to perform a vibration test and expand the vibration range of the device, so that the device can not only be applied to static load tests, improving the practicability of the device.

[0024] 2. Slideably install a sliding frame on the base, install a downward pressure structure on the sliding frame, and install a downward pulling structure and a displacement monitoring structure on the upper side of the downward pressure frame. The sliding frame can slide, so that the loading position can be adjusted according to the size of the wind turbine blade and the test requirements, improving the adaptability of the device. The downward pressure test can be carried out through the downward pressure structure, and the downward pressure structure can not only press downward, but also drive the downward pulling structure to pull downward, so as to measure the wind turbine blade higher than the highest point of the downward pressure structure, realizing the test of the wind turbine blade inclined upward.

[0025] 3. Slideably install a telescopic rod on the sliding frame. When pressing down the wind turbine blade, the wind turbine blade bends, so that the wind turbine blade can push the telescopic rod, causing the telescopic rod to be compressed and generate displacement. Thus, the deflection change of the wind turbine blade can be detected according to the telescopic degree and displacement change of the telescopic rod, and two-point loading is used, so that the changes of the two telescopic rods can be compared to ensure the accuracy of the static load test of the wind turbine blade.

[0026] 4. Slideably install a fixing rod on the pressing block, and install a pressure detection structure between the downward pressing block and the fixing rod. The downward pulling pressure can be detected through the pressure detection structure, and the relative sliding distance between the downward pressing block and the wind turbine blade can be detected, so as to realize the test of the deflection of the wind turbine blade, enabling the device to have multiple test methods and improving the adaptability of the device. Description of the drawings

[0027] Figure 1 It is an overall assembled three-dimensional structural schematic diagram of a static load deflection inclination test device for a wind turbine blade of the present invention;

[0028] Figure 2 Schematic diagram of the assembly structure of the support frame and the rotating frame in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0029] Figure 3 Schematic diagram of the overall assembly sectional structure of a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0030] Figure 4 Schematic diagram of the assembly structure of the sliding frame and the sliding block in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0031] Figure 5 Schematic diagram of the assembly structure of the second hydraulic cylinder and the lower pressing frame in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0032] Figure 6 Schematic three - dimensional structure diagram of the assembly of the lower pressing frame and the wind turbine blade in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0033] Figure 7 Exploded view of the lower pressing frame and the wind turbine blade in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0034] Figure 8 Schematic three - dimensional structure diagram of the assembly of the second hydraulic cylinder, the lower pressing frame and the telescopic rod in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0035] Figure 9 Schematic three - dimensional structure diagram of the assembly of the lower pressing block and the fixed rod in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0036] Figure 10 Exploded view of the lower pressing block and the fixed rod in a static load deflection and inclination test device for a wind turbine blade of the present invention;

[0037] Figure 11 Flow chart of a static load deflection and inclination test device for a wind turbine blade of the present invention and its test method;

[0038] In the figure: 1, base; 2, support frame; 3, rotating frame; 4, first rotating shaft; 5, first motor; 6, second rotating shaft; 7, second motor; 8, first gear; 9, second gear; 10, third rotating shaft; 11, mounting seat; 12, wind power blade; 13, first hydraulic cylinder; 14, pushing ball head; 15, electric slide rail; 16, sliding frame; 17, second hydraulic cylinder; 18, pressing frame; 19, first pressure sensor; 20, first chute; 21, telescopic rod; 22, first rod body; 23, second rod body; 24, first spring; 25, second chute; 26, sliding block; 27, first displacement sensor; 28, second displacement sensor; 29, pressing ball head; 30, fixing block; 31, third displacement sensor; 32, pulling rope; 33, pressing block; 34, through groove; 35, fixing rod; 36, adhesive tape; 37, third chute; 38, sliding rod; 39, second pressure sensor; 40, support limiting plate; 41, second spring. Specific implementation manner

[0039] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0040] Please refer to Figures 1 to 11 , the present invention provides a technical solution: a static load deflection inclination test device for wind power blades and its test method, including a base 1, a support frame 2 is fixed on the base 1, a rotating frame 3 is rotatably fitted in the support frame 2, a mounting seat 11 is rotatably fitted on one side of the rotating frame 3, a wind power blade 12 is installed on one side of the rotating frame 3, the wind power blade 12 corresponds to the mounting seat 11, a support limiting structure is installed on the base 1, a first motor 5 is installed on the support frame 2, the first motor 5 corresponds to the rotating frame 3, a driving structure is installed on the rotating frame 3, the driving structure corresponds to the mounting seat 11, a plurality of sliding frames 16 are slidably fitted on the base 1, a pressing structure is installed on the sliding frame 16, the pressing structure includes a pressing frame 18, a plurality of first pressure sensors 19 are installed on the pressing frame 18, a pulling-down structure is installed on the upper side of the pressing frame 18, a displacement monitoring structure is installed on the upper side of the pressing frame 18, the displacement monitoring structure corresponds to the pulling-down structure, the pulling-down structure includes a pressing block 33, a fixing rod 35 is slidably fitted on the pressing block 33, the fixing rod 35 corresponds to the wind power blade 12, a pressure detection structure is installed between the pressing block 33 and the fixing rod 35, a telescopic rod 21 is slidably fitted on the sliding frame 16, and the telescopic rod 21 corresponds to the wind power blade 12.

[0041] In this embodiment, first rotating shafts 4 are fixed to both sides of the rotating frame 3. The first rotating shafts 4 are rotatably connected to the support frame 2. The output end of the first motor 5 is fixedly connected to one of the first rotating shafts 4. The driving structure includes a second motor 7 fixed to the support frame 2. The output end of the second motor 7 is fixedly connected to a second rotating shaft 6. A first gear 8 is fixed to the second rotating shaft 6. A third rotating shaft 10 is rotatably fitted on the rotating frame 3. The third rotating shaft 10 and the mounting base 11 are fixedly connected by bolts. A second gear 9 is fixed to the third rotating shaft 10. The second gear 9 meshes with the first gear 8.

[0042] Specifically, start the first motor 5, so that the first motor 5 drives the first rotating shaft 4 to rotate, thereby driving the rotating frame 3 to rotate, and then the wind power blade 12 installed on one side of the rotating frame 3 can be rotated, so that the wind power blade 12 tilts upward, thus preventing the small space below the wind power blade 12 from affecting the deflection test of the wind power blade 12. And the rotating frame 3 can be reciprocally rotated within a certain angle range by driving the first motor 5, so that the wind power blade 12 can be vibrated up and down, and then the vibration test can be carried out, expanding the application range of the device; start the second motor 7, and then the second motor 7 drives the second rotating shaft 6 to rotate, thereby driving the first gear 8 to rotate, so that the first gear 8 meshes with the second gear 9 and rotates, thereby driving the third rotating shaft 10 to rotate, so that the third rotating shaft 10 drives the mounting base 11 to rotate, and then the wind power blade 12 installed on the mounting base 11 can be rotated, so that the angle of the wind power blade 12 can be adjusted, thus facilitating the test of wind power blades 12 in different directions. And no matter how the wind power blade 12 rotates, it is a relative downward pull test on the wind power blade 12 without upward pull, which is more convenient for testing. And the third rotating shaft 10 and the mounting base 11 are installed by bolts, and the mounting base 11 can be disassembled, so that the mounting base 11 can be replaced with a size specification matching the wind power blade 12, thus enabling the installation of wind power blades 12 with different size specifications and expanding the application range of the device.

[0043] The support and limit structure includes a plurality of first hydraulic cylinders 13 fixed to the base 1. The output end of the first hydraulic cylinder 13 is fixedly connected with a push ball head 14. The push ball head 14 is in contact with the rotating frame 3. A plurality of support and limit plates 40 are fixed inside the support frame 2. The support and limit plates 40 are located below the rotating frame 3.

[0044] Specifically, the rotating frame 3 can be supported by the supporting and limiting plate 40; the first motor 5 drives the rotating frame 3 to tilt upward. When the angle of the rotating frame 3 needs to be fixed, the first hydraulic cylinder 13 is started, so that the first hydraulic cylinder 13 pushes the pushing ball head 14 upward until the pushing ball head 14 contacts the rotating frame 3. At this time, the rotating frame 3 can be limited by the pushing ball head 14. A triangular structure is formed among the pushing ball head 14, the rotating frame 3 and the first rotating shaft 4, so that the rotating frame 3 can be prevented from falling under the action of gravity, ensuring that the angle of the rotating frame 3 will not change, thus ensuring the stability during the test of the wind turbine blade 12 and the accuracy of the test results.

[0045] A plurality of electric slide rails 15 are fixed on the base 1. The output ends of the plurality of electric slide rails 15 are respectively fixedly connected with a plurality of sliding frames 16. A plurality of second hydraulic cylinders 17 are fixed on the sliding frames 16. The output end of the second hydraulic cylinder 17 is fixedly connected with the pressing frame 18. The pressing frame 18 is of a C-shaped structure. The wind turbine blade 12 is located on the relative inner side of the pressing frame 18. The first pressure sensor 19 is fixed on the side of the pressing frame 18 close to the wind turbine blade 12.

[0046] Specifically, by starting the electric slide rails 15, the sliding frames 16 can be driven to slide through the electric slide rails 15, so as to drive the second hydraulic cylinders 17 to slide, and then the pressing frame 18 can be slid to the loading point. By starting the second hydraulic cylinders 17, the pressing frame 18 can be driven to move up and down through the second hydraulic cylinders 17, so as to perform a static load test on the wind turbine blade 12. At the same time, the plurality of sliding frames 16 can slide to different positions respectively. For example, two of the sliding frames 16 are used for two-point loading, so that appropriate loading points can be selected according to needs to ensure the test results. At the same time, the magnitude of the pressing pressure can be monitored by the first pressure sensor 19, so as to prevent the situation of excessive loading pressure and ensure the accuracy of the test results.

[0047] A first chute 20 is formed on the sliding frame 16. A sliding block 26 is fixed to the lower side of the telescopic rod 21. The sliding block 26 corresponds to the first chute 20. The telescopic rod 21 includes a first rod body 22 and a second rod body 23. The first rod body 22 is slidably connected with the second rod body 23. The first rod body 22 is fixedly connected with the sliding block 26. A pressing ball head 29 is fixed to the top of the second rod body 23. The pressing ball head 29 contacts the wind turbine blade 12. A second chute 25 is formed in the first rod body 22. The second chute 25 corresponds to the second rod body 23. A first spring 24 is fixed in the second chute 25. The first spring 24 is fixedly connected with the second rod body 23. A first displacement sensor 27 is installed in the second chute 25. A second spring 41 is fixed in the first chute 20. The second spring 41 is fixedly connected with the first rod body 22. A second displacement sensor 28 is installed in the first chute 20.

[0048] Specifically, when loading, the wind turbine blade 12 will deform, so the wind turbine blade 12 will press down on the ball head 29, causing the ball head 29 to press down on the second rod 23. The second rod 23 slides in the second chute 25, and at the same time, it pushes the first rod 22 to slide in the first chute 20 through the slider 26, so that the telescopic rod 21 shortens and generates a certain displacement. The length change and displacement change of the telescopic rod 21 can be monitored by the first displacement sensor 27 and the second displacement sensor 28, so that the displacement change of a certain point on the wind turbine blade 12 can be obtained. By comparing the two sets of data before and after the change, the deflection change of the wind turbine blade 12 can be calculated, so as to realize the measurement of the static load deflection inclination of the wind turbine blade 12. And the change curve of the wind turbine blade 12 can be directly drawn through the change data of the telescopic rods 21 on multiple sliders 26, so that the deflection change of the wind turbine blade 12 can be intuitively observed, and the static load test result of the wind turbine blade 12 can be more intuitively displayed.

[0049] The displacement monitoring structure includes a fixed block 30 fixed on the lower pressing frame 18. A third displacement sensor 31 is fixed on the fixed block 30. The pulling-down structure further includes a pulling rope 32. The pulling rope 32 corresponds to the lower pressing block 33. The pulling rope 32 is fixedly connected to the fixed block 30. A through groove 34 is formed in the lower pressing block 33, and the through groove 34 corresponds to the pulling rope 32. A plurality of adhesive tapes 36 are fixed on the fixed rod 35. The fixed rod 35 is fixedly adhered to the wind turbine blade 12 through the adhesive tapes 36. Third chutes 37 are formed on both sides of the fixed rod 35, and the third chutes 37 correspond to the lower pressing block 33. A sliding rod 38 is fixed on the lower pressing block 33, and the sliding rod 38 corresponds to the third chutes 37. The pressure detection structure includes a plurality of second pressure sensors 39 fixed on the fixed rod 35, and the second pressure sensors 39 are in contact with the lower pressing block 33.

[0050] Specifically, when the larger wind turbine blade 12 is tilted upward, the highest position reached by the second hydraulic cylinder 17 pushing the lower pressing frame 18 is lower than the wind turbine blade 12 at this time. Therefore, it is impossible to test the wind turbine blade 12 by pressing down the lower pressing frame 18. At this time, the pulling rope 32 can be tied to the wind turbine blade 12, and the fixing rod 35 can be fixed to the wind turbine blade 12 by the adhesive tape 36. The fixing rod 35 has exactly the same curvature as the wind turbine blade 12. At this time, the pulling rope 32 passes through the lower pressing block 33, and the lower pressing block 33 slides on the fixing rod 35. Start the second hydraulic cylinder 17, and the lower pressing frame 18 can be pulled down by the second hydraulic cylinder 17, so that the lower pressing block 33 can be pulled down by the pulling rope 32, and the downward pressing test can be carried out; when testing, at this time, the downward pressing pressure can be monitored by the second pressure sensor 39, and when the wind turbine blade 12 deforms, there will be a displacement change between the lower pressing block 33 and the fixing rod 35. Therefore, the displacement change of the lower pressing block 33 can be judged by the different second pressure sensors 39 pressed by the lower pressing block 33, and the height change of the wind turbine blade 12 can be monitored by the third displacement sensor 31, so as to monitor the deflection of the wind turbine blade 12 and ensure the accuracy of the test results.

[0051] A test method for a static load deflection inclination test device of a wind turbine blade includes the following steps:

[0052] S1. Fix the wind turbine blade on the mounting base, rotate and adjust the angle of the rotating frame according to the size of the wind turbine blade, drive the wind turbine blade to rotate by the rotating frame, and then support and fix the position of the rotating frame by the first hydraulic cylinder;

[0053] S2. Drive the sliding frame to slide to the loading position by the electric slide rail, start the second hydraulic cylinder to drive the lower pressing frame to press down, and carry out a static load test by two-point loading;

[0054] S3. Press down the wind turbine blade so that the wind turbine blade deforms and bends into a certain arc. The wind turbine blade presses down to push the telescopic rod, and the telescopic degree and moving distance of the telescopic rod are detected by the first displacement sensor and the second displacement sensor, so as to judge the deflection change of the wind turbine blade;

[0055] S4. For a longer wind turbine blade, slide the lower pressing frame to the lower side of the wind turbine blade, tie the wind turbine blade with a pulling rope, the lower pressing block is in contact with the wind turbine blade, and then start the second hydraulic cylinder to drive the pulling rope to pull the lower pressing block to press down the wind turbine blade, and the static load test of the wind turbine blade can be carried out;

[0056] S5. The bending of the wind turbine blade causes the lower pressing block to slide relatively. The downward pressing force is detected by the second pressure sensor, and the deflection change is detected by the third displacement sensor and different second pressure sensors pressed;

[0057] S6. Start the second motor to drive the wind turbine blade to rotate, so as to carry out the downward pressing test on different surfaces of the wind turbine blade.

[0058] Workflow: For a relatively small wind turbine blade 12, install and fix the wind turbine blade 12 on the mounting base 11, then start the second hydraulic cylinder 17, so that the second hydraulic cylinder 17 pushes the lower pressing frame 18 above the wind turbine blade 12. Start the electric slide rail 15, and the sliding frame 16 can be driven to slide by the electric slide rail 15, thereby driving the second hydraulic cylinder 17 to slide, and the lower pressing frame 18 can be slid to the loading point. Then start the second hydraulic cylinder 17, so that the second hydraulic cylinder 17 drives the lower pressing frame 18 to move downward, and the wind turbine blade 12 can be loaded. At this time, the wind turbine blade 12 will deform, so the wind turbine blade 12 will press down the ball head 29, causing the ball head 29 to press down the second rod body 23. The second rod body 23 slides in the second chute 25, and at the same time pushes the first rod body 22 to slide in the first chute 20 through the sliding block 26, so that the telescopic rod 21 shortens and generates a certain displacement. The length change and displacement change of the telescopic rod 21 can be monitored by the first displacement sensor 27 and the second displacement sensor 28, so that the displacement change of a certain point of the wind turbine blade 12 can be obtained. By comparing the two sets of data before and after the change, the deflection change of the wind turbine blade 12 can be calculated, thus realizing the measurement of the static load deflection inclination of the wind turbine blade 12; For a relatively large wind turbine blade 12, start the first motor 5, so that the first motor 5 drives the first rotating shaft 4 to rotate, thereby driving the rotating frame 3 to rotate, and the wind turbine blade 12 installed on one side of the rotating frame 3 can be rotated, so that the wind turbine blade 12 tilts upward. Then start the electric slide rail 15, and the sliding frame 16 can be driven to slide to the loading position by the electric slide rail 15. Tie the pull rope 32 to the wind turbine blade 12, and paste and fix the fixing rod 35 on the wind turbine blade 12 through the adhesive tape 36. Start the second hydraulic cylinder 17, and the lower pressing frame 18 can be pulled down by the second hydraulic cylinder 17, so that the lower pressing block 33 can be pulled down through the pull rope 32, and the downward pressing test can be carried out. At this time, the displacement change of the lower pressing block 33 can be judged by different second pressure sensors 39 pressed by the lower pressing block 33, and the height change of the wind turbine blade 12 can be monitored by the third displacement sensor 31, so that the deflection of the wind turbine blade 12 can be monitored; Start the second motor 7, and the second rotating shaft 6 can be driven to rotate by the second motor 7, thereby driving the first gear 8 to rotate, so that the first gear 8 meshes and rotates with the second gear 9, thereby driving the third rotating shaft 10 to rotate, so that the third rotating shaft 10 drives the mounting base 11 to rotate, and the wind turbine blade 12 installed on the mounting base 11 rotates. At this time, when the static load test is carried out on the wind turbine blade 12 again, compared with the previous wind turbine blade 12, although it is still pulled down, the test direction changes relative to the previous one, so that measurements can be carried out in multiple directions.

[0059] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A static load deflection and inclination test device for a wind turbine blade, comprising a base (1), characterized in that, A support frame (2) is fixed on the base (1). A rotating frame (3) is rotatably fitted inside the support frame (2). A mounting seat (11) is rotatably fitted on one side of the rotating frame (3). A wind power blade (12) is installed on one side of the rotating frame (3). The wind power blade (12) corresponds to the mounting seat (11). A support and limit structure is installed on the base (1). A first motor (5) is installed on the support frame (2). The first motor (5) corresponds to the rotating frame (3). A driving structure is installed on the rotating frame (3). The driving structure corresponds to the mounting seat (11). A plurality of sliding frames (16) are slidably fitted on the base (1). A pressing structure is installed on the sliding frame (16). The pressing structure includes a pressing frame (18). A plurality of first pressure sensors (19) are installed on the pressing frame (18). A pulling-down structure is installed on the upper side of the pressing frame (18). A displacement monitoring structure is installed on the upper side of the pressing frame (18). The displacement monitoring structure corresponds to the pulling-down structure. The pulling-down structure includes a pressing block (33). A fixing rod (35) is slidably fitted on the pressing block (33). The fixing rod (35) corresponds to the wind power blade (12). A pressure detection structure is installed between the pressing block (33) and the fixing rod (35). A telescopic rod (21) is slidably fitted on the sliding frame (16). The telescopic rod (21) corresponds to the wind power blade (12).

2. The static load deflection inclination test device for a wind turbine blade according to claim 1, wherein: First rotating shafts (4) are fixed on both sides of the rotating frame (3). The first rotating shafts (4) are rotatably connected to the support frame (2). The output end of the first motor (5) is fixedly connected to one of the first rotating shafts (4). The driving structure includes a second motor (7) fixed on the support frame (2). The output end of the second motor (7) is fixed with a second rotating shaft (6). A first gear (8) is fixed on the second rotating shaft (6). A third rotating shaft (10) is rotatably fitted on the rotating frame (3). The third rotating shaft (10) is fixedly connected to the mounting seat (11). A second gear (9) is fixed on the third rotating shaft (10). The second gear (9) meshes with the first gear (8).

3. The static load deflection and inclination test device for a wind turbine blade according to claim 1, wherein: The support and limit structure includes a plurality of first hydraulic cylinders (13) fixed on the base (1). The output end of the first hydraulic cylinder (13) is fixed with a pushing ball head (14). The pushing ball head (14) contacts the rotating frame (3). A plurality of support and limit plates (40) are fixed inside the support frame (2). The support and limit plates (40) are located on the lower side of the rotating frame (3).

4. The static load deflection and inclination test device for a wind turbine blade according to claim 1, characterized in that: A plurality of electric slide rails (15) are fixed on the base (1). The output ends of the plurality of electric slide rails (15) are respectively fixedly connected to the plurality of sliding frames (16). A plurality of second hydraulic cylinders (17) are fixed on the sliding frame (16). The output end of the second hydraulic cylinder (17) is fixedly connected to the pressing frame (18). The pressing frame (18) is of a C-shaped structure. The wind power blade (12) is located on the relative inner side of the pressing frame (18). The first pressure sensors (19) are fixed on the side of the pressing frame (18) close to the wind power blade (12).

5. A static load deflection and inclination testing device for a wind turbine blade according to claim 1, characterized in that: A first chute (20) is formed in the sliding frame (16). A sliding block (26) is fixed to the lower side of the telescopic rod (21). The sliding block (26) corresponds to the first chute (20). The telescopic rod (21) includes a first rod body (22) and a second rod body (23). The first rod body (22) is slidably connected to the second rod body (23). The first rod body (22) is fixedly connected to the sliding block (26). A pressing ball head (29) is fixed to the top of the second rod body (23). The pressing ball head (29) contacts the wind power blade (12).

6. The static load deflection and inclination testing device for a wind turbine blade according to claim 5, characterized in that: A second chute (25) is formed in the first rod body (22). The second chute (25) corresponds to the second rod body (23). A first spring (24) is fixed in the second chute (25). The first spring (24) is fixedly connected to the second rod body (23). A first displacement sensor (27) is installed in the second chute (25). A second spring (41) is fixed in the first chute (20). The second spring (41) is fixedly connected to the first rod body (22). A second displacement sensor (28) is installed in the first chute (20).

7. A static load deflection and inclination test device for a wind turbine blade according to claim 1, characterized in that: The displacement monitoring structure includes a fixed block (30) fixed to the lower pressing frame (18). A third displacement sensor (31) is fixed to the fixed block (30). The pulling-down structure further includes a pull rope (32). The pull rope (32) corresponds to the lower pressing block (33). The pull rope (32) is fixedly connected to the fixed block (30).

8. The static load deflection and inclination testing device for a wind turbine blade according to claim 7, characterized in that: A through groove (34) is formed in the lower pressing block (33). The through groove (34) corresponds to the pull rope (32). A plurality of adhesive tapes (36) are fixed to the fixed rod (35). The fixed rod (35) is adhesively fixed to the wind power blade (12) through the adhesive tapes (36). Third chutes (37) are formed on both sides of the fixed rod (35). The third chutes (37) correspond to the lower pressing block (33).

9. The static load deflection and inclination test device for a wind turbine blade according to claim 8, wherein: A sliding rod (38) is fixed to the lower pressing block (33). The sliding rod (38) corresponds to the third chute (37). The pressure detection structure includes a plurality of second pressure sensors (39) fixed to the fixed rod (35). The second pressure sensors (39) contact the lower pressing block (33).

10. A testing method for a static load deflection inclination testing device of a wind turbine blade, including the testing device described in claim 1, characterized in that: It includes the following steps: S1. Fix the wind power blade on the mounting seat. Rotate and adjust the angle of the rotating frame according to the size of the wind power blade. The rotating frame drives the wind power blade to rotate. Then, support and fix the position of the rotating frame through the first hydraulic cylinder; S2. Drive the sliding frame to slide to the loading position through the electric slide rail. Start the second hydraulic cylinder to drive the lower pressing frame to press down. Perform a static load test through two-point loading; S3. Press down the wind power blade to cause the wind power blade to deform and bend into an arc. The downward pressure on the wind power blade pushes the telescopic rod. Detect the telescopic degree and moving distance of the telescopic rod through the first displacement sensor and the second displacement sensor, so as to judge the deflection change of the wind power blade; S4. Slide the lower pressing frame to the lower side of the wind power blade. Tie the wind power blade with a pull rope. The lower pressing block contacts the wind power blade. Then start the second hydraulic cylinder to drive the pull rope to pull the lower pressing block to press down the wind power blade, and the static load test of the wind power blade can be carried out; S5. The bending of the wind turbine blade causes the lower pressing block to slide relatively. The force of the downward pressing is detected by the second pressure sensor, and the deflection change is detected by the third displacement sensor and different second pressure sensors during the pressing movement. S6. Start the second motor to drive the wind turbine blade to rotate, so as to perform the downward pressing test on different surfaces of the wind turbine blade.

Images