Wind power blade static load deflection inclination testing device and testing method thereof

Abstract

The invention provides a wind power blade static load deflection inclination testing device and a testing method thereof, and relates to the technical field of wind power blade test.The wind power blade static load deflection inclination testing device comprises a base, a supporting frame is fixed to the base, a rotating frame is rotationally matched with the interior of the supporting frame, a mounting base is rotationally matched with one side of the rotating frame, and a wind power blade is arranged on one side of the rotating frame; the wind power blades correspond to the mounting bases, a supporting limiting structure is arranged on the base, a first motor is arranged on the supporting frame and corresponds to the rotating frame, and a driving structure is arranged on the rotating frame. The wind power blade vibration testing device is suitable for a long wind power blade, the wind power blade is prevented from being influenced by a small space below the wind power blade, the wind power blades of most sizes can be tested by the device, the application range of the device is expanded, the wind power blade can be driven to vibrate through reciprocating motion of the rotating frame, vibration testing is carried out, and the testing efficiency is improved. And the vibration range of the device is expanded, so that the device can be applied to static load testing, and the practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade testing, and in particular to a static load deflection 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 process from wood, metal to composite materials. Currently, mainly reinforcing materials such as carbon fiber and glass fiber are used. These materials not only improve the strength and toughness of the blades but also meet the requirement of lightweight to adapt to high-efficiency power generation under complex working conditions.

[0003] After the processing of wind turbine blades is completed, it is necessary to conduct static load tests on the wind turbine blades to test the bending degree of the blades under specific acting forces and ensure that the blade structure 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 needs a larger outer dimension to meet the requirement of the lifting distance, resulting in a smaller applicable range of the device and being unable to be applicable to most sizes of wind turbine blades.

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

[0005] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide a static load deflection 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 sizes of wind turbine blades, thereby expanding the applicable range of the device. And it can drive the wind turbine blade to vibrate through the reciprocating movement of the rotating frame, thereby conducting vibration tests and expanding 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; 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 implemented through the following technical solutions: a static load deflection inclination test device for a wind turbine blade and its test 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 below 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 inside the relative sides 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 chute 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 chute, 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. The first spring 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. The second spring 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. The pulling rope 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. The third sliding grooves 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: S1. Fix the wind power blade on the mounting base. 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 pressing frame to press down. Perform a static load test through two-point loading. S3. Press down the wind power blade so that the wind power blade deforms and bends 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. 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 a pulling rope. The pressing block is in contact with the wind power blade. Then start the second hydraulic cylinder to drive the pulling rope to pull the 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 power blade causes the pressing block to slide relatively. Detect the pressing force through the second pressure sensor. Detect the deflection change through the third displacement sensor and different second pressure sensors that are pressed. S6. Start the second motor to drive the wind power blade to rotate, so as to perform a pressing test on different surfaces of the wind power blade.

[0016] The beneficial effects of the present invention: 1. Rotate and 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 power blade to rotate through the mounting seat, and then the wind power blade can be turned over, so that the wind power blade can be tested at various angles. And no matter what angle it is, it is pulled downward for testing, and the testing is relatively simple. Moreover, the angle of the wind power blade can be adjusted by rotating the rotating frame, so that the wind power blade can be installed obliquely upward, so that the device is applicable to longer wind power blades, preventing the small space below the wind power blade from affecting the wind power blade, enabling the device to test wind power blades of most sizes, thus expanding the application range of the device. And the rotating frame can drive the wind power blade to vibrate by making a reciprocating motion, so as to conduct 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.

[0017] 2. Slide and install a sliding frame on the base, install a downward pressing structure on the sliding frame, and install a downward pulling structure and a displacement monitoring structure on the upper side of the downward pressing frame. The sliding frame can slide, so that the loading position can be adjusted according to the size of the wind power blade and the test requirements, improving the adaptability of the device. The downward pressing test can be carried out through the downward pressing structure, and the downward pressing structure can not only press downward, but also drive the downward pulling structure to pull downward, so as to measure the wind power blade higher than the highest point of the downward pressing structure, realizing the test of the wind power blade inclined upward.

[0018] 3. Slide and install a telescopic rod on the sliding frame. When pressing the wind power blade, the wind power blade bends, so that the wind power blade can push the telescopic rod, causing the telescopic rod to be compressed and generate displacement. Thus, the deflection change of the wind power 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 power blade.

[0019] 4. Slide and 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 distance that the downward pressing block slides relative to the wind power blade can be detected, so as to realize the test of the deflection of the wind power blade, enabling the device to have multiple test methods and improving the adaptability of the device. Description of the Drawings

[0020] Figure 1 It is a three-dimensional assembly structure schematic diagram of the whole static load deflection inclination test device for a wind power blade of the present invention; Figure 2 It is an assembly structure schematic diagram of the support frame and the rotating frame in the static load deflection inclination test device for a wind power blade of the present invention; Figure 3Schematic diagram of the overall assembly section structure of a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 4 Schematic diagram of the assembly structure of a sliding frame and a sliding block in a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 5 Schematic diagram of the assembly structure of a second hydraulic cylinder and a lower pressing frame in a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 6 Schematic three-dimensional structure diagram of the assembly of a lower pressing frame and a wind turbine blade in a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 7 Explosion diagram of a lower pressing frame and a wind turbine blade in a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 8 Schematic three-dimensional structure diagram of the assembly of a second hydraulic cylinder, a lower pressing frame, and a telescopic rod in a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 9 Schematic three-dimensional structure diagram of the assembly of a lower pressing block and a fixing rod in a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 10 Explosion diagram of a lower pressing block and a fixing rod in a static load deflection and inclination testing device for a wind turbine blade according to the present invention; Figure 11 Flow chart of a static load deflection and inclination testing device for a wind turbine blade according to the present invention and its testing method; 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 turbine blade; 13, first hydraulic cylinder; 14, pushing ball head; 15, electric slide rail; 16, sliding frame; 17, second hydraulic cylinder; 18, lower 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, fixed block; 31, third displacement sensor; 32, pulling rope; 33, lower 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. Detailed implementation manners

[0021] 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.

[0022] Please refer toFigures 1 to 11 , the present invention provides a technical solution: a static load deflection inclination test device for a wind turbine blade 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 turbine blade 12 is installed on one side of the rotating frame 3, the wind turbine 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 turbine 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 turbine blade 12.

[0023] In this embodiment, 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 fixedly connected to 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 by bolts, and a second gear 9 is fixed on the third rotating shaft 10, and the second gear 9 meshes with the first gear 8.

[0024] 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, thereby preventing the small space below the wind power blade 12 from affecting the deflection test of the wind power blade 12. Moreover, the rotating frame 3 can be driven by the first motor 5 to reciprocate within a certain angle range, so that the wind power blade 12 can be vibrated up and down, and thus the vibration test can be carried out, expanding the applicable range of the device. Start the second motor 7, and the second motor 7 can drive the second rotating shaft 6 to rotate, thereby driving the first gear 8 to rotate, making the first gear 8 mesh with the second gear 9 to rotate, thereby driving the third rotating shaft 10 to rotate, so that the third rotating shaft 10 drives the mounting seat 11 to rotate, and then drives the wind power blade 12 installed on the mounting seat 11 to rotate, 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. Moreover, no matter how the wind power blade 12 rotates, it is a relative downward pull test for the wind power blade 12 without the need for upward pull, which is more convenient for testing. In addition, the third rotating shaft 10 and the mounting seat 11 are installed by bolts, and the mounting seat 11 can be disassembled, so that the mounting seat 11 can be replaced with a size specification matching the wind power blade 12, thereby enabling the installation of wind power blades 12 with different size specifications and expanding the applicable range of the device.

[0025] 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 fixed with a push ball head 14, and 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, and the support and limit plates 40 are located below the rotating frame 3.

[0026] Specifically, the rotating frame 3 can be supported by the support and limit plates 40. Drive the rotating frame 3 to tilt upward by the first motor 5. When it is necessary to fix the angle of the rotating frame 3, start the first hydraulic cylinder 13 so that the first hydraulic cylinder 13 pushes the push ball head 14 upward until the push ball head 14 is in contact with the rotating frame 3. At this time, the rotating frame 3 can be limited by the push ball head 14, and a triangular structure is formed among the push ball head 14, the rotating frame 3, and the first rotating shaft 4, thereby preventing the rotating frame 3 from falling under the action of gravity and ensuring that the angle of the rotating frame 3 does not change, thus ensuring the stability of the wind power blade 12 during the test and the accuracy of the test results.

[0027] 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 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 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 sensor 19 is fixed on the side of the pressing frame 18 close to the wind power blade 12.

[0028] Specifically, by starting the electric slide rail 15, the sliding frame 16 can be driven to slide through the electric slide rail 15, thereby driving the second hydraulic cylinder 17 to slide, and then the pressing frame 18 can be slid to the loading point. By starting the second hydraulic cylinder 17, the pressing frame 18 can be driven to move up and down through the second hydraulic cylinder 17, so as to conduct a static load test on the wind power 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 through the first pressure sensor 19, so as to prevent the situation of excessive loading pressure and ensure the accuracy of the test results.

[0029] 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 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 is in contact with the wind power 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 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.

[0030] Specifically, when loading, the wind turbine blade 12 will deform. As a result, 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 body 23. The second rod body 23 slides in the second chute 25, and at the same time, it pushes the first rod body 22 to slide in the first chute 20 through the sliding block 26, causing the telescopic rod 21 to shorten and generate 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. Thus, 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, thereby realizing the measurement of the static load deflection inclination of the wind turbine blade 12. And based on the change data of the telescopic rods 21 on multiple sliding blocks 26, the change curve of the wind turbine blade 12 can be directly drawn, so that the deflection change of the wind turbine blade 12 can be visually observed, and the static load test result of the wind turbine blade 12 can be more intuitively displayed.

[0031] The displacement monitoring structure includes a fixed block 30 fixed to 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 to the fixed rod 35, and the second pressure sensors 39 are in contact with the lower pressing block 33.

[0032] 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 with 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, the downward pressing pressure can be monitored by the second pressure sensor 39 at this time. 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 that the deflection of the wind turbine blade 12 can be monitored to ensure the accuracy of the test results.

[0033] A test method for a static load deflection inclination test device of a wind turbine blade, comprising the following steps: 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, the rotating frame drives the wind turbine blade to rotate, and 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, and perform a static load test through two-point loading; 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; 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; 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 the different second pressure sensors pressed; S6. Start the second motor to drive the wind turbine blade to rotate to realize the downward pressing test on different surfaces of the wind turbine blade.

[0034] 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 pressed 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 at the same time. 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 groups 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; 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 pulling 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 pulling 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, thereby driving the wind turbine blade 12 installed on the mounting base 11 to rotate. At this time, if a 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 before, so that measurements can be carried out in multiple directions.

[0035] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style 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 wind turbine blade static load deflection tilt test device, comprising a base (1), characterized in that: The base (1) is fixed with a support frame (2), a rotating frame (3) is rotatably engaged in the support frame (2), a mounting seat (11) is rotatably engaged on one side of the rotating frame (3), a wind turbine blade (12) is mounted on one side of the rotating frame (3), and the wind turbine blade (12) corresponds to the mounting seat (11), a support limit structure is mounted on the base (1), a first motor (5) is mounted on the support frame (2), and the first motor (5) corresponds to the rotating frame (3), a driving structure is mounted on the rotating frame (3), and the driving structure corresponds to the mounting seat (11), a plurality of sliding frames (16) are slidably engaged on the base (1), and a downward pressure mechanism is mounted on the sliding frame (16). The structure comprises a lower pressing frame (18), a plurality of first pressure sensors (19) are mounted on the lower pressing frame (18), a pull-down structure is mounted on the upper side of the lower pressing frame (18), a displacement monitoring structure is mounted on the upper side of the lower pressing frame (18), the displacement monitoring structure corresponds to the pull-down structure, the pull-down structure comprises a lower pressing block (33), a fixed rod (35) is slidably engaged on the lower pressing block (33), the fixed rod (35) corresponds to the wind turbine blade (12), a pressure detection structure is mounted between the lower pressing block (33) and the fixed rod (35), and a telescopic rod (21) is slidably engaged on the sliding frame (16), the telescopic rod (21) corresponds to the wind turbine blade (12).

2. A wind turbine blade static load deflection and inclination test device according to claim 1, characterized in that: A first rotating shaft (4) is fixed on both sides of the rotating frame (3), the first rotating shaft (4) is 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 comprises a second motor (7) fixed to the support frame (2), the output end of the second motor (7) is fixed to a second rotating shaft (6), the second rotating shaft (6) is fixed to a first gear (8), a third rotating shaft (10) is rotatably matched on the rotating frame (3), the third rotating shaft (10) is fixedly connected to a mounting seat (11), a second gear (9) is fixed to the third rotating shaft (10), and the second gear (9) is meshed with the first gear (8).

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

4. A wind turbine blade static load deflection and inclination test device 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 a plurality of sliding frames (16), a plurality of second hydraulic cylinders (17) are fixed on the sliding frames (16), the output ends of the second hydraulic cylinders (17) are fixedly connected to a lower pressure frame (18), the lower pressure frame (18) is a C-shaped structure, the wind turbine blade (12) is located on the relatively inner side of the lower pressure frame (18), and the first pressure sensor (19) is fixed to a side of the lower pressure frame (18) close to the wind turbine blade (12).

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

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

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

8. The static load deflection and inclination testing device for wind turbine blades according to claim 7, characterized in that: A through slot (34) is provided in the lower pressing block (33), the through slot (34) corresponding to the pull rope (32), a plurality of adhesive tapes (36) are fixed to the fixing rod (35), the fixing rod (35) is fixed to the wind turbine blade (12) by the adhesive tapes (36), and third slide slots (37) are provided on both sides of the fixing rod (35), the third slide slots (37) corresponding to the lower pressing block (33).

9. A wind turbine blade static load deflection and inclination testing device according to claim 8, characterized in that: A slide bar (38) is fixed on the lower pressing block (33), the slide bar (38) corresponds to the third slide groove (37), and 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).

10. A method for testing a static load deflection and tilt test device for a wind turbine blade, comprising the test device according to claim 1, characterized in that: The following steps are involved: S1. Fix the wind turbine blades on the mounting seat, rotate and adjust the angle of the rotating frame according to the size of the wind turbine blades, the rotating frame drives the wind turbine blades to rotate, and 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 pressing frame to press down, and perform static load test through two-point loading; S3, pressing down the wind turbine blades to deform the wind turbine blades and bend them into an arc, the wind turbine blades push the telescopic rod downward, 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 determine the deflection change of the wind turbine blades; S4, slide the pressing frame to the lower side of the wind turbine blade, tie the wind turbine blade with a pull rope, make the pressing block contact with the wind turbine blade, then start the second hydraulic cylinder to drive the pull rope to pull the pressing block to press down the wind turbine blade, and then perform a static load test on the wind turbine blade; S5, the wind turbine blade is bent so that the pressing block slides relatively, the pressing force is detected by the second pressure sensor, and the deflection change is detected by the third displacement sensor and the second pressure sensor that is pressed differently; S6. Start the second motor to drive the wind turbine blade to rotate, so as to perform downward pressure test on different surfaces of the wind turbine blade.

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