A device for detecting the strength of wind turbine blades

Abstract

This invention relates to the field of generator blade testing technology, specifically disclosing a device for testing the strength of wind turbine blades, comprising a main structure, a drive structure, an assist structure, and a clamping structure. The drive structure is fixedly mounted on the main structure, the assist structure can be symmetrically mounted on the left and right sides of the main structure, and the clamping structure is fixedly mounted on the assist structure. The control unit in the assist structure can realize the forward and backward movement and height adjustment of the support position through a first electric slide rail and a fourth hydraulic cylinder. The second testing component can match the up and down swing angle of the blade in real time through the elastic cooperation of a fifth hydraulic cylinder, a compression rod, and a second spring. The drive structure drives the drive shaft through a first motor, and in conjunction with the eccentric seat and reciprocating arm, converts the rotational motion into stable reciprocating swing. At the same time, the gear and gear arm achieve dual power control under the drive of a third hydraulic cylinder, enabling the swing test and stability of two blades or one blade.

Description

Technical Field

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

[0002] In the field of wind turbine blade testing technology, existing testing equipment can only fix one blade and drive it to swing up and down. Since the blade is relatively long and has a certain degree of toughness, it will bend a certain length and swing back and forth as it swings. Its strength is then determined based on the swing amplitude and number of swings.

[0003] Existing wind turbine blade strength testing devices generally suffer from the following technical defects: the support structure of traditional testing devices is mostly fixed, making it difficult to flexibly adjust the support position according to the blade size and testing requirements; the clamping structure usually adopts a fixed clamping method, which can only fix the blade end and cannot adjust the blade fixing position according to the testing requirements, making it difficult to cover the strength testing of different areas of the blade, affecting the comprehensiveness of the test results; existing devices cannot achieve precise adjustment of the blade swing amplitude through structural cooperation, and the testing efficiency of a single blade is low. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-party collaborative digital management platform system for new energy projects, which solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for detecting the strength of wind turbine blades, comprising a main structure, a drive structure, an assist structure, and a clamping structure; the drive structure is fixedly mounted on the main structure, the assist structure is symmetrically mounted on the left and right sides of the main structure, and the clamping structure is fixedly mounted on the assist structure.

[0006] Preferably, the main structure includes a base, a pair of first shaft brackets, a first shaft rod, a pair of first test components, and a second shaft rod; one end of the pair of first shaft brackets is symmetrically arranged at the middle of the front and rear ends of the base, and the two ends of the first shaft rod are movably embedded between the other ends of the first shaft brackets; the pair of first test components are symmetrically arranged on the upper walls of the left and right ends of the base; and the two ends of the second shaft rod are movably connected between the first test components.

[0007] Preferably, the first test assembly includes a second shaft frame, a third shaft, a tilting arm, a bearing seat, a first hydraulic cylinder, a lifting frame, a lowering seat, and a second hydraulic cylinder; the second shaft frame is H-shaped, fixedly mounted on the right end of the base, and corresponding to the first shaft frame; the two ends of the third shaft are respectively movably extending through the top ends of the second shaft frame, and the third shaft is located below the first shaft; the tilting arm is concave, fixedly fitted near the middle of the third shaft, and the two ends of the tilting arm are respectively inclined towards the bottom of the first shaft frame; the two ends of the tilting arm are respectively movably fitted onto the second shaft frame. On the two shafts, the bearing seat is fixedly mounted on the tilting arm and located on the right side of the tilting arm. The first hydraulic cylinder is fixedly passed through the right end of the tilting arm and located on the left side of the bearing seat. One end of the lifting frame is movably passed through the tilting arm, and the middle part of the lifting frame is fixedly connected to the telescopic end of the first hydraulic cylinder. The other end of the lifting frame is opposite to the bearing seat. The lower pressure seat is fixedly mounted on the other end of the lifting frame, and the lifting frame and the bearing seat are relatively fastened and fitted together. One end of the second hydraulic cylinder is movably connected to the upper wall of the tilting arm, and the other end of the second hydraulic cylinder is obliquely movably connected to the first shaft. The second hydraulic cylinder is located on the left side of the lifting frame.

[0008] Preferably, the drive structure includes a pair of mounting seats, a pair of drive shafts, a pair of eccentric seats, a reciprocating arm, a first motor, a gear, a toothed arm, and a third hydraulic cylinder; one end of each of the pair of mounting seats is fixedly disposed on the lower wall of the middle part of the second shaft frame, and a sliding opening is provided in the middle of the other end of one of the mounting seats; one end of each of the pair of drive shafts movably passes through the middle of the second shaft frame; one end of each of the pair of eccentric seats is fixedly disposed on opposite ends of the drive shafts; one end of the reciprocating arm is movably disposed between the other ends of the eccentric seats, and the other end of the reciprocating arm is movably fitted onto the middle part of the second shaft; the first motor is fixedly disposed on the other mounting seat, and the driving end of the first motor is connected to one of the drive shafts; the gear is fixedly fitted onto the other drive shaft, and the gear is located above one of the mounting seats; one end of the toothed arm is movably disposed on one of the mounting seats and located at the sliding opening; the other end of the toothed arm is located below the gear, and the toothed arm meshes with the gear; the third hydraulic cylinder is fixedly disposed on one of the mounting seats, and the telescopic end of the third hydraulic cylinder is fixedly connected to the toothed arm.

[0009] Preferably, the assist structure includes an adjustment unit and a second test component; the adjustment unit is fixedly disposed on the left side of the base, and the second test component is fixedly disposed on the adjustment unit. The adjustment unit is used to adjust the support position and height of the second test component, and the second test component is used to match the up-and-down swing of the blade.

[0010] Preferably, the control unit includes a base, a first electric slide rail, a mounting platform, a sleeve rod, a first spring, a pair of slide seats, a pair of fourth hydraulic cylinders, a pair of support arms, and a support platform; one end of the base is fixedly mounted on the left end of the base, the first electric slide rail is fixedly embedded in the middle of the base, the mounting platform is fixedly mounted on the first electric slide rail, the mounting platform is located above the base and can move back and forth, the mounting platform has a cross-shaped limiting groove near the front upper wall that communicates with the right side wall, one end of the sleeve rod is fixedly mounted on the left side wall inside the limiting groove, and the sleeve rod is embedded in the middle of the limiting groove. The first spring is movably fitted into the middle of the sleeve rod and is embedded in the limiting groove. A pair of slides are movably inserted into the limiting groove and are movably fitted onto the sleeve rod. The slides are located at the left and right ends of the first spring. A pair of fourth hydraulic cylinders are symmetrically arranged on the upper wall of the mounting platform and located at the rear side of the left and right ends of the limiting groove. The telescopic ends of the pair of fourth hydraulic cylinders are fixedly connected to the slides. One end of each pair of support arms is movably connected to the slides, and the other end of the support arms is relatively inclined. The lower walls of the left and right ends of the bearing platform are movably connected to the other ends of the support arms.

[0011] Preferably, the second test assembly includes a pair of fifth hydraulic cylinders, a pair of compression rods, a pair of second springs, and a support plate; one end of each pair of fifth hydraulic cylinders is fixedly inserted through the middle of the support platform, and the fifth hydraulic cylinders are respectively symmetrically positioned near the left and right ends; one end of each pair of compression rods is movably inserted through the middle of the left and right ends of the support platform, and a baffle is fixedly provided on the other end of each compression rod; the pair of second springs are respectively movably fitted onto the compression rods and located between the baffles and the upper wall of the support platform; and the left and right ends of the support plate are respectively movably connected to the compression rods.

[0012] Preferably, the clamping structure includes a second electric slide rail, a pair of third electric slide rails, and two pairs of force-applying units; one end of the second electric slide rail is vertically disposed in the middle of the support plate, and a second slider that moves relative to each other is symmetrically disposed on the second electric slide rail; one end of each pair of third electric slide rails is symmetrically disposed on the second slider of the second electric slide rail, and the third electric slide rails are capable of relative movement; a third slider that moves relative to each other is symmetrically disposed on each pair of third electric slide rails; the two pairs of force-applying units are symmetrically disposed on the third slider of the third electric slide rail; the force-applying units move relative to each other longitudinally via the second electric slide rails, and the force-applying units move relative to each other laterally via the third electric slide rails.

[0013] Preferably, the force-applying unit includes a force-applying arm, a flipping seat, a clamping plate, and a pair of third springs; one end of the force-applying arm is obliquely fixedly mounted on the third slider of the third electric slide rail, one end of the flipping seat is fixedly mounted at the middle of the other end of the force-applying arm, and the two ends of the flipping seat can be flipped relative to each other, the clamping plate is fixedly mounted on the other end of the flipping seat, and the pair of third springs are symmetrically arranged between the other end of the force-applying arm and the clamping plate, and the pair of third springs are symmetrically located on both sides of the flipping seat.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The control unit in the assist structure can realize the forward and backward movement and height adjustment of the support position through the first electric slide rail and the fourth hydraulic cylinder. The second test component can match the up and down swing angle of the blade in real time through the elastic cooperation of the fifth hydraulic cylinder, the compression rod and the second spring, which solves the problem of the traditional support structure being fixed and unchanging, improves the adaptability to different blades, and can also limit the compression rod to fix the blade at different positions, change the swing amplitude and the swing length of the blade.

[0016] 2. The drive structure uses a first motor to drive the drive shaft, which, in conjunction with the eccentric seat and reciprocating arm, converts the rotational motion into a stable reciprocating oscillation. At the same time, the gear and gear arm are driven by a third hydraulic cylinder to achieve dual power control. Under the premise of relatively heavy blades, it can realize the oscillation test and stability of two blades or one blade. The synchronous test of two blades can improve the test efficiency and generate comparisons. The equipment can also be driven by two first motors or two third hydraulic cylinders and gear arms, depending on the actual needs.

[0017] 3. The clamping structure enables the longitudinal and lateral movement of the force application unit through the second and third electric slide rails. Combined with the force application arm, flipping seat and clamping plate, the blade fixing part can be flexibly adjusted, such as clamping the cylindrical end or the flat fan-shaped middle of the blade. Through the synergistic effect of the assist structure and the clamping structure, the blade swing amplitude can be changed in real time to meet the parameter requirements of different tests and cover the strength detection of the entire blade area.

[0018] 4. The compression rod and the second spring in the second test assembly can provide buffering force and match the angle change under the swing when the blade swings. They can also limit the compression rod to prevent it from rising or falling by the fifth hydraulic cylinder, thus maintaining a rigid support function. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the assembly structure of the main assembly body of the present invention;

[0020] Figure 2 This is a schematic diagram of the assembly and disassembly of the main structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the split structure of the driving structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the assembly structure of the main body structure and the drive structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the disassembled structure of the assistive structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the disassembled clamping structure of the present invention;

[0025] Figure 7 A schematic diagram of the assembly structure for the supporting structure and clamping structure;

[0026] Figure 8 This is an enlarged schematic diagram of the force-applying unit structure of the present invention.

[0027] In the diagram: 1. Main structure; 11. Base; 12. First shaft frame; 13. First shaft; 14. First test assembly; 141. Second shaft frame; 142. Third shaft; 143. Tilting arm; 144. Bearing seat; 145. First hydraulic cylinder; 146. Lifting frame; 147. Lower pressure seat; 148. Second hydraulic cylinder; 15. Second shaft; 2. Drive structure; 21. Mounting seat; 22. Drive shaft; 23. Eccentric seat; 24. Reciprocating arm; 25. First motor; 26. Gear; 27. Gear arm; 28. Third... 3. Hydraulic cylinder; 4. Control unit; 5. Base; 6. First electric slide rail; 7. Mounting platform; 8. Sleeve rod; 9. First spring; 10. Slide seat; 11. Fourth hydraulic cylinder; 22. Support arm; 23. Bearing platform; 24. Second test assembly; 35. Fifth hydraulic cylinder; 46. Compression rod; 57. Second spring; 68. Support plate; 79. Support plate; 80. Second test assembly; 91. Fifth hydraulic cylinder; 102. Compression rod; 11. Second spring; 12. Support plate; 13. Clamping structure; 14. Second electric slide rail; 15. Third electric slide rail; 16. Force application unit; 17. Force application arm; 18. Tilting seat; 19. Clamping plate; 20. Third spring. Detailed Implementation

[0028] The following will refer to the appendices in the embodiments of the present invention. Figures 1-8 To provide further details.

[0029] like Figure 1 , Figure 4 and Figure 7As shown, the present invention provides a technical solution: a device for detecting the strength of wind turbine blades, comprising a main structure 1, a drive structure 2, an assist structure, and a clamping structure 5; the drive structure 2 is fixedly mounted on the main structure 1, the assist structure is symmetrically mounted on the left and right sides of the main structure 1, and the clamping structure 5 is fixedly mounted on the assist structure; the main structure 1 is used to fix the blade tip and can drive the blade to swing up and down for strength testing, the drive structure 2 synchronously drives the blade to swing up and down, the assist structure can assist in supporting the blade for the experiment and can adjust the support position within a certain range, the assist structure can also match the up and down swing of the blade, the clamping structure 5 can adjust its height with the help of the assist structure, and the clamping structure 5 can clamp the blade, and the fixed part of the blade can be adjusted by the cooperation of the assist structure and the clamping structure 5, thereby changing the up and down swing amplitude.

[0030] like Figure 2 As shown, as a preferred embodiment, the main structure 1 further includes a base 11, a pair of first shaft brackets 12, a first shaft rod 13, a pair of first test components 14, and a second shaft rod 15. One end of each pair of first shaft brackets 12 is symmetrically positioned at the midpoint of the front and rear ends of the base 11. The two ends of each first shaft rod 13 are movably fitted between the other ends of the first shaft brackets 12. The pair of first test components 14 are symmetrically and alternately positioned on the upper walls of the left and right ends of the base 11. The two ends of each second shaft rod 15 are movably connected between the first test components 14. The first shaft brackets 12 support the first shaft rods 13, and the first shaft rods 13 are used to mount the second hydraulic cylinder 148. The second shaft rod 15 connects the two first test components 14, allowing the first test components 14 to swing up and down and fix the blade ends. The blade ends are placed on the bearing seats 144 of the first test components 14, and the first hydraulic cylinder 145 is activated to push the lifting frame 146, causing the lower pressing seat 147 to press the blade, thus completing the fixing.

[0031] like Figure 2As shown, as a preferred embodiment, the first test assembly 14 further includes a second shaft frame 141, a third shaft rod 142, a tilting arm 143, a bearing seat 144, a first hydraulic cylinder 145, a lifting frame 146, a lowering seat 147, and a second hydraulic cylinder 148; the second shaft frame 141 is H-shaped, and is fixedly mounted on the right end of the base 31, and corresponds to the first shaft frame 12; both ends of the third shaft rod 142 movably pass through the second shaft frame 145. At both ends of the top, the third shaft 142 is located below the first shaft 13. The tilting arm 143 is concave and is fixedly fitted onto the middle of the third shaft 142 near the center. Both ends of the tilting arm 143 are inclined towards the bottom of the first shaft bracket 12. Both ends of the tilting arm 143 are movably fitted onto the second shaft 15. The bearing seat 144 is fixedly mounted on the tilting arm 143 and located on the right side of the tilting arm 143. The first hydraulic cylinder 145 is fixedly inserted through the right end of the tilting arm 143 and located at... On the left side of the support base 144, one end of the lifting frame 146 movably passes through the tilting arm 143, and the middle of the lifting frame 146 is fixedly connected to the telescopic end of the first hydraulic cylinder 145. The other end of the lifting frame 146 is opposite to the support base 144. The lower pressure seat 147 is fixedly installed on the other end of the lifting frame 146, and the lifting frame 146 and the support base 144 are engaged and fitted together. One end of the second hydraulic cylinder 148 is movably connected to the upper wall of the tilting arm 143, and the other end of the second hydraulic cylinder 148 is inclined and movably connected to the first hydraulic cylinder 145. On the first shaft 13, the second hydraulic cylinder 148 is located on the left side of the lifting frame 146; the third shaft 142 is installed through the second shaft bracket 141, and the tilting arm 143 is movably installed through the third shaft 142, and the tilting arms 143 are connected to each other through the second shaft 15. The first hydraulic cylinder 145 drives the lower pressure seat 147 on the lifting frame 146 to be fastened to the bearing seat 144 to clamp the blade end. The second hydraulic cylinder 148 extends and retracts to drive the tilting arm 143 to tilt on the third shaft 142.

[0032] More specifically, the first test component 14 forms a swing base through the mechanical connection of the third shaft 142 on the second shaft frame 141 and the tilting arm 143. The blade end is clamped and fixed by the first hydraulic cylinder 145. The tilting arm 143 is driven to swing by the linkage between the second hydraulic cylinder 148 and the first shaft 13. Finally, the synchronous action of the two ends of the first test component 14 is achieved through the connection of the second shaft 15.

[0033] like Figure 3As shown, as a preferred embodiment, the drive structure 2 further includes a pair of mounting seats 21, a pair of drive shafts 22, a pair of eccentric seats 23, a reciprocating arm 24, a first motor 25, a gear 26, a gear arm 27, and a third hydraulic cylinder 28. One end of each of the mounting seats 21 is fixedly disposed on the lower wall of the middle portion of the second shaft frame 141, and a sliding opening is provided in the middle portion of the other end of one of the mounting seats 21. One end of each of the drive shafts 22 movably passes through the middle portion of the second shaft frame 141. One end of each of the eccentric seats 23 is fixedly disposed on opposite ends of the drive shafts 22. One end of the reciprocating arm 24 is movably disposed between the other ends of the eccentric seats 23, and the other end of the reciprocating arm 24 is movably fitted onto the middle portion of the second shaft 15. The first motor 25 is fixedly disposed on the other mounting seat 21, and the drive end of the first motor 25 is connected to one of the drive shafts 22. The gear 26 is fixedly fitted onto the other drive shaft. On 22, and gear 26 is located above one of the mounting seats 21, one end of gear arm 27 is movably set on one of the mounting seats 21 and located at the sliding port, the other end of gear arm 27 is located below gear 26, and gear arm 27 meshes with gear 26, third hydraulic cylinder 28 is fixedly set on one of the mounting seats 21, and the telescopic end of third hydraulic cylinder 28 is fixedly connected to gear arm 27; by the first motor 25 driving one of the drive shafts 22 to rotate, and by the third hydraulic cylinder 28 driving gear arm 27 to move, gear arm 27 drives gear 26 on another drive shaft 22 to rotate, realizing different ways of power driving eccentric seat 23 to rotate, thereby driving reciprocating arm 24 to be subjected to force for eccentric lifting, and reciprocating arm 24 driving second shaft 15 to reciprocate lifting, realizing multi-power driving swing of tilting arm 143 and second hydraulic cylinder 148 to fit the heavier blade.

[0034] More specifically, the drive structure 2 uses a dual-power mechanism driven by the first motor 25 and the third hydraulic cylinder 28 to convert rotational motion into reciprocating lifting motion. The first motor 25 or the third hydraulic cylinder 28 drives the drive shaft 22 to rotate, and the eccentric seat 23 rotates with the drive shaft 22, causing the reciprocating arm 24 to move up and down. The reciprocating arm 24 drives the second shaft 15 to move up and down, and then through the tilting arm 143 and the second hydraulic cylinder 148, it can simultaneously drive the two blades to swing up and down. At the same time, the multi-power drive avoids the problem of unstable swing caused by excessive load when the single power drive is used.

[0035] like Figure 4 As shown, as a preferred embodiment, the assist structure further includes an adjustment unit 3 and a second test component 4; the adjustment unit 3 is fixedly disposed on the left side of the base 11, and the second test component 4 is fixedly disposed on the adjustment unit 3. The adjustment unit 3 is used to adjust the support position and height of the second test component 4, and the second test component 4 is used to match the up and down swing of the blade.

[0036] like Figure 4As shown, as a preferred embodiment, the control unit 3 further includes a base 31, a first electric slide rail 32, a mounting platform 33, a sleeve rod 34, a first spring 35, a pair of slide blocks 36, a pair of fourth hydraulic cylinders 37, a pair of support arms 38, and a support platform 39; one end of the base 31 is fixedly mounted on the left end of the base 11, the first electric slide rail 32 is fixedly embedded in the middle of the base 31, the mounting platform 33 is fixedly mounted on the first electric slide rail 32, the mounting platform 33 is located above the base 31 and can move back and forth, the mounting platform 33 has a cross-shaped limiting groove near the front upper wall that communicates with the right side wall, one end of the sleeve rod 34 is fixedly mounted on the left side wall inside the limiting groove, and the sleeve rod 34 is embedded in the middle of the limiting groove, the first spring 35 is movably mounted on the middle of the sleeve rod 34, and the first spring 35 is embedded in the limiting groove, and the pair of slide blocks 36 are... The sliding blocks 36 are movably inserted into the limiting groove, and the sliding blocks 36 are respectively movably fitted onto the sleeve rod 34. The sliding blocks 36 are respectively located at the left and right ends of the first spring 35. A pair of fourth hydraulic cylinders 37 are respectively symmetrically arranged on the upper wall of the mounting platform 33 and located at the rear side of the left and right ends of the limiting groove. The telescopic ends of the pair of fourth hydraulic cylinders 37 are respectively fixedly connected to the sliding blocks 36. One end of a pair of support arms 38 is movably connected to the sliding blocks 36, and the other end of the support arms 38 is relatively inclined. The lower walls of the left and right ends of the bearing platform 39 are respectively movably connected to the other end of the support arms 38. The mounting platform 33 is moved back and forth by the first electric slide rail 32 through the docking of the base 31 with the base 11, thereby realizing the forward and backward feeding of the clamping structure 5. The sliding blocks 36 are moved on the sleeve rod 34 by the fourth hydraulic cylinders 37, thereby adjusting the relative angle of the support arms 38 and adjusting the height of the bearing platform 39.

[0037] More specifically, the control unit 3 achieves bidirectional positioning through a composite adjustment mechanism driven by the first electric slide rail 32 and the fourth hydraulic cylinder 37. The first electric slide rail 32 drives the mounting platform 33 to move back and forth to adjust the support position and adapt to different blade widths. The fourth hydraulic cylinder 37 drives the slide block 36 to move in the limiting groove and adjusts the height of the bearing platform 39 through the lever principle of the support arm 38 to achieve height adjustment of the support position.

[0038] like Figure 5As shown, as a preferred embodiment, the second test assembly 4 further includes a pair of fifth hydraulic cylinders 41, a pair of compression rods 42, a pair of second springs 43, and a support plate 44. One end of each of the pair of fifth hydraulic cylinders 41 is fixedly inserted through the middle of the support platform 39, and the fifth hydraulic cylinders 41 are respectively symmetrically positioned near the left and right ends. One end of each of the pair of compression rods 42 is movably inserted through the middle of the left and right ends of the support platform 39, and a baffle is fixedly provided on the other end of each compression rod 42. The pair of second springs 43 are respectively movably fitted onto the compression rods 42 and located between the baffles and the upper wall of the support platform 39. The left and right ends of the support plate 44 are movably connected to the compression rods 42. By extending the fifth hydraulic cylinders 41 and fitting against the lower wall of the support plate 44, the support plate 44 is prevented from being rigidly supported by the descent of the compression rods 42. By disengaging the fifth hydraulic cylinders 41 from the support plate 44, the support plate 44 can be raised and lowered by the compression rods 42 and compress the second springs 43.

[0039] More specifically, the second test component 4 locks the support plate 44 through the fifth hydraulic cylinder 41, and the support plate 44 can achieve adaptive support through a composite mechanism of buffer lifting and lowering with the help of the second spring 43. The extension and retraction of the fifth hydraulic cylinder 41 controls the support stiffness of the support plate 44 to meet the needs of different test scenarios. The cooperation between the compression rod 42 and the second spring 43 provides dynamic buffering in elastic mode, which fits the swaying in the blade test.

[0040] like Figure 6 As shown, as a preferred embodiment, the clamping structure 5 further includes a second electric slide rail 51, a pair of third electric slide rails 52, and two pairs of force-applying units 53. One end of the second electric slide rail 51 is vertically disposed in the middle of the support plate 44, and a second slider that moves relative to each other is symmetrically disposed on the second electric slide rail 51. One end of each pair of third electric slide rails 52 is symmetrically disposed on the second slider of the second electric slide rail 51, and the third electric slide rails 52 are capable of relative movement. A third slider that moves relative to each other is symmetrically disposed on each pair of third electric slide rails 52. The two pairs of force-applying units 53 are symmetrically disposed on the third slider of the third electric slide rail 52. The force-applying units 53 move relative to each other longitudinally via the second electric slide rail 51 and laterally via the third electric slide rail 52. The spacing between the second electric slide rail 51 and the third electric slide rail 52 is adjusted to achieve the adjustment of the clamping thickness by adjusting the spacing between the two pairs of force-applying units 53 on the upper and lower sides. The clamping width is adjusted by adjusting the spacing between the relatively inclined force-applying units 53 via the third electric slide rail 52.

[0041] More specifically, the second electric slide rail 51 provides longitudinal position adjustment to meet the clamping requirements of blades at different heights; the third electric slide rail 52 provides lateral (horizontal) position adjustment to achieve clamping of blades at different lateral positions at the same height; the force application unit 53 achieves flexible clamping after precise positioning through the combination of elastic structure and flipping structure, which ensures clamping stability and fits the different outer wall shapes of different positions of the blade.

[0042] like Figure 8 As shown, as a preferred embodiment, the force-applying unit 53 further includes a force-applying arm 531, a flipping seat 532, a clamping plate 533, and a pair of third springs 534. One end of the force-applying arm 531 is obliquely fixedly mounted on the third slider of the third electric slide rail 52. One end of the flipping seat 532 is fixedly mounted at the middle of the other end of the force-applying arm 531, and the two ends of the flipping seat 532 can be flipped relative to each other. The clamping plate 533 is fixedly mounted on the other end of the flipping seat 532. A pair of third springs 534 are symmetrically arranged between the other end of the force-applying arm 531 and the clamping plate 533. The pair of third springs 534 are located on both sides of the flipping seat 532 and are symmetrically positioned. By the relative tilt of the force-applying arm 531, the clamping plate 533 can swing back and forth with the help of the flipping seat 532, and the clamping plate 533 is limited by the third springs 534, so that the clamping plate 533 can be relatively tilted to clamp the end of the cylindrical blade or the middle plane of the blade.

[0043] More specifically, the inclined installation of the lever arm 531 converts the lateral movement on the third electric slide rail 52 into a clamping force perpendicular to the blade surface, adapting to the clamping requirements of different positions; the flip-up structure of the flip seat 532 allows the clamping plate 533 to adapt to the cylindrical or planar shape of the blade, expanding the clamping range.

[0044] Working principle:

[0045] The equipment is placed stably by the base 11 in the main structure 1, and the control unit 3, the second test component 4 and the clamping structure 5 are symmetrically arranged on the left and right sides of the equipment.

[0046] When the equipment is in use, the first test component 14, which is symmetrically arranged, can fix two blades for testing at the same time, or it can be used to test a single blade.

[0047] The blade tip is inserted into the bearing seat 144, and the first hydraulic cylinder 145 is driven to lower the lifting frame 146, causing the lower pressure seat 147 to be fastened onto the bearing seat 144 to clamp and fix the blade tip. At this time, the blade can drive the tilting arm 143 to swing up and down through the drive structure 2. That is, it is started by the first motor 25 and the third hydraulic cylinder 28 on the mounting base 21. The first motor 25 drives one of the drive shafts 22 to rotate reciprocally, and the third hydraulic cylinder 28 drives the gear arm 27 to move reciprocally, driving the gear 26 to rotate, thereby driving the other drive shaft 22 to rotate. A dual-drive power mode is achieved, which can maintain stable drive under the corresponding load. At the same time, the drive shaft 22 reciprocates relative to the eccentric seat 23 at one end, driving the eccentric reciprocating arm 24 to rise and fall. The reciprocating arm 24 drives the second shaft 15 to rise and fall, causing one end of the flipping arm 143 in the two pairs of first test components 14 connected in series by the second shaft 15 to be stressed. The flipping arm 143 flips by the third shaft 142 on the second shaft frame 141, which can drive the fan blade on the bearing seat 144 to swing up and down to test the strength of the end and whether it will break at the swing frequency.

[0048] When the first motor 25 and the third hydraulic cylinder 28 are started, the second hydraulic cylinder 148 will also be started to reciprocate. The two ends of the second hydraulic cylinder 148 are respectively movably connected to the first shaft 13 of the first shaft frame 12 and the tilting arm 143. The extension and retraction of the second hydraulic cylinder 148 will match the up and down swing of the tilting arm 143, and the second hydraulic cylinder 148 will be rotated at a certain angle on the first shaft 13 to match and synchronously apply force to drive the tilting arm 143, which matches the longer and heavier generator blades, making the equipment test more stable.

[0049] In the test, the blade was fixed only by the bearing seat 144 and the pressure seat 147. During the up-and-down swing of the blade, the overall swing amplitude of the blade was large, and the length of the blade that was swinging up and down under force was relatively long, which led to a large bending amplitude of the blade tip under force.

[0050] The equipment can also adjust the fixed position of the blade, the amplitude and length of the swing, and improve the amount of test data and the test effect by using the control unit 3 and the clamping structure 5 according to the test requirements.

[0051] That is, by driving the first electric slide rail 32 in the base 31 of the control unit 3, the mounting platform 33 is moved to the rear side, causing the third electric slide rail 52 to be located on the upper and lower sides of the blade respectively. Then, according to the test position of the blade, the third electric slide rail 52 is driven to adjust the front and rear distance of the force application unit 53 and adjust the clamping width.

[0052] Then, the second electric slide rail 51 is controlled to move the third electric slide rail 52 relative to it, and the blade is clamped by the force application unit 53. Since the clamping plate 533 can be flipped on the force application arm 531 by means of the flipping seat 532, and the clamping plate 533 can be reset by means of the third spring 534, the clamping plate 533 can be flipped to fit the side wall of the blade according to the different positions of the blade when it contacts the blade by means of the inclined force application arm 531.

[0053] The height of the clamping structure 5 can also be adjusted by the extension and retraction of the fourth hydraulic cylinder 37, which moves the slide 36 under the force of the sleeve rod 34 and adjusts the tilt angle of the support arm 38, thereby adjusting the height of the bearing platform 39. This can help adjust the height and left and right position of the clamping structure 5. When the slide 36 moves relative to the support, it will compress the first spring 35 and use the first spring 35 to help the slide 36 separate and reset.

[0054] By clamping the blade at the corresponding part of the blade by the clamping structure 5, and by driving the extension of the fifth hydraulic cylinder 41 in the second test assembly 4, the extension end of the fifth hydraulic cylinder 41 is attached to the lower wall of the support plate 44 to limit the support plate 44 and realize the rigid support of the second test assembly 4. This can change the fixed point at the blade end, and with the up and down swing of the flipping arm 143, the sliding block 36 is reciprocated to move relative to and separate from each other, so that the clamping structure 5 cooperates with the up and down swing of the blade. Since the two points are clamped by the support seat 144 and the clamping structure 5, the blade cannot achieve flexible swing between the two points, and the swing length at the end becomes smaller, so the swing bending amplitude becomes smaller.

[0055] If the clamping structure 5 is clamped on the blade without changing the blade swing length, the fifth hydraulic cylinder 41 is disengaged from the support plate 44. The support plate 44 can be raised and lowered on the support platform 39 and compress the second spring 43 by means of the compression rod 42, and the blade swings up and down by means of the relative or opposite movement of the slide 36.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Other modifications or functional substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A device for detecting the strength of wind turbine blades, characterized in that, It includes a main structure (1), a drive structure (2), an assist structure, and a clamping structure (5); the drive structure (2) is fixedly mounted on the main structure (1), the assist structure can be symmetrically mounted on the left and right sides of the main structure (1), and the clamping structure (5) is fixedly mounted on the assist structure; The main structure (1) includes a base (11), a pair of first shaft brackets (12), a first shaft (13), a pair of first test components (14), and a second shaft (15). One end of a pair of first shaft brackets (12) is symmetrically arranged at the middle of the front and rear ends of the base (11), and the two ends of the first shaft rod (13) are movably embedded between the other ends of the first shaft brackets (12). A pair of first test components (14) are symmetrically arranged on the upper walls of the left and right ends of the base (11), and the two ends of the second shaft rod (15) are movably connected between the first test components (14). The first test assembly (14) includes a second shaft (141), a third shaft (142), a tilting arm (143), a bearing seat (144), a first hydraulic cylinder (145), a lifting frame (146), a lower pressure seat (147), and a second hydraulic cylinder (148). The second shaft bracket (141) is H-shaped and is fixedly mounted on the right end of the base (31). The second shaft bracket (141) corresponds to the first shaft bracket (12). The two ends of the third shaft rod (142) are respectively movably inserted through the top ends of the second shaft bracket (141). The third shaft rod (142) is located below the first shaft rod (13). The flipping arm (143) is concave. The flipping arm (143) is fixedly mounted on the middle of the third shaft rod (142) near the middle. The two ends of the flipping arm (143) are respectively inclined towards the bottom of the first shaft bracket (12). The two ends of the flipping arm (143) are respectively movably mounted on the second shaft rod (15). The bearing seat (144) is fixedly mounted on the flipping arm (143) and located on the right side of the flipping arm (143). The first hydraulic cylinder (145) is fixedly inserted through the right end of the tilting arm (143) and located on the left side of the bearing seat (144). One end of the lifting frame (146) is movably inserted through the tilting arm (143), and the middle part of the lifting frame (146) is fixedly connected to the telescopic end of the first hydraulic cylinder (145). The other end of the lifting frame (146) is opposite to the bearing seat (144). The lower pressure seat (147) is fixedly set on the other end of the lifting frame (146), and the lifting frame (146) and the bearing seat (144) are relatively fastened and fitted together. One end of the second hydraulic cylinder (148) is movably connected to the upper wall of the tilting arm (143), and the other end of the second hydraulic cylinder (148) is inclinedly movably connected to the first shaft (13). The second hydraulic cylinder (148) is located on the left side of the lifting frame (146). The drive structure (2) includes a pair of mounting seats (21), a pair of drive shafts (22), a pair of eccentric seats (23), a reciprocating arm (24), a first motor (25), a gear (26), a gear arm (27), and a third hydraulic cylinder (28). One end of each of the pair of mounting seats (21) is fixedly disposed on the lower wall of the middle part of the second shaft frame (141). A sliding opening is provided in the middle of the other end of one of the mounting seats (21). One end of each of the pair of drive shafts (22) movably passes through the middle part of the second shaft frame (141). One end of each of the pair of eccentric seats (23) is fixedly disposed on the opposite end of the drive shaft (22). One end of the reciprocating arm (24) is movably disposed between the other ends of the eccentric seats (23), and the other end of the reciprocating arm (24) is movably fitted into the middle part of the second shaft (15). The first motor (25) is fixedly disposed on the other mounting seat (21). The first motor (25) is connected to one of the drive shafts (22), the gear (26) is fixedly mounted on another drive shaft (22), and the gear (26) is located above one of the mounting seats (21). One end of the toothed arm (27) is movably mounted on one of the mounting seats (21) and located at the sliding port. The other end of the toothed arm (27) is located below the gear (26), and the toothed arm (27) meshes with the gear (26). The third hydraulic cylinder (28) is fixedly mounted on one of the mounting seats (21), and the telescopic end of the third hydraulic cylinder (28) is fixedly connected to the toothed arm (27). The assist structure includes a control unit (3) and a second test component (4); the control unit (3) is fixedly disposed on the left side of the base (11), and the second test component (4) is fixedly disposed on the control unit (3). The control unit (3) is used to adjust the support position and height of the second test component (4), and the second test component (4) is used to match the up and down swing of the blade.

2. The device for detecting the strength of wind turbine blades according to claim 1, characterized in that, The control unit (3) includes a base (31), a first electric slide rail (32), a mounting platform (33), a sleeve rod (34), a first spring (35), a pair of slide seats (36), a pair of fourth hydraulic cylinders (37), a pair of support arms (38), and a support platform (39). One end of the base (31) is fixedly mounted on the left end of the base (11). The first electric slide rail (32) is fixedly embedded in the middle of the base (31). The mounting platform (33) is fixedly mounted on the first electric slide rail (32). The mounting platform (33) is located above the base (31) and can move back and forth. The mounting platform (33) has a cross-shaped limiting groove near the front upper wall that communicates with the right side wall. One end of the sleeve rod (34) is fixedly mounted on the left side wall inside the limiting groove, and the sleeve rod (34) is embedded in the middle of the limiting groove. The first spring (35) is movably mounted on the middle of the sleeve rod (34), and the first spring (35) is embedded in the limiting groove. A pair of slide blocks (36) are movably inserted into the limiting grooves, and the slide blocks (36) are movably fitted onto the sleeve rod (34). The slide blocks (36) are located at the left and right ends of the first spring (35). A pair of fourth hydraulic cylinders (37) are symmetrically arranged on the upper wall of the mounting platform (33) and located at the rear side of the left and right ends of the limiting groove. The telescopic ends of the pair of fourth hydraulic cylinders (37) are fixedly connected to the slide blocks (36). One end of a pair of support arms (38) is movably connected to the slide blocks (36), and the other end of the support arms (38) is relatively inclined. The lower walls of the left and right ends of the bearing platform (39) are movably connected to the other end of the support arms (38).

3. The device for detecting the strength of wind turbine blades according to claim 2, characterized in that, The second test assembly (4) includes a pair of fifth hydraulic cylinders (41), a pair of compression rods (42), a pair of second springs (43), and a support plate (44). One end of each of the five hydraulic cylinders (41) is fixedly inserted through the middle of the support platform (39), and the five hydraulic cylinders (41) are respectively symmetrically located near the left and right ends. One end of each of the compression rods (42) is movably inserted through the middle of the left and right ends of the support platform (39), and a baffle is fixedly provided on the other end of each compression rod (42). A pair of second springs (43) are movably fitted on the compression rods (42) and located between the baffle and the upper wall of the support platform (39). The left and right ends of the support plate (44) are movably connected to the compression rods (42).

4. The device for detecting the strength of wind turbine blades according to claim 3, characterized in that, The clamping structure (5) includes a second electric slide rail (51), a pair of third electric slide rails (52), and two pairs of force application units (53); One end of the second electric slide rail (51) is vertically disposed in the middle of the support plate (44), and a second slider that moves relative to each other is symmetrically disposed on the second electric slide rail (51). One end of a pair of third electric slide rails (52) is symmetrically disposed on the second slider of the second electric slide rail (51), and the third electric slide rails (52) can move relative to each other. A pair of third electric slide rails (52) is symmetrically disposed on the third slider that moves relative to each other. Two pairs of force-applying units (53) are symmetrically disposed on the third slider of the third electric slide rail (52). The force-applying units (53) move relative to each other longitudinally through the second electric slide rail (51), and the force-applying units (53) move relative to each other laterally through the third electric slide rail (52).

5. The device for detecting the strength of wind turbine blades according to claim 4, characterized in that, The force-applying unit (53) includes a force-applying arm (531), a flipping seat (532), a clamping plate (533), and a pair of third springs (534). One end of the force-applying arm (531) is inclined and fixedly mounted on the third slider of the third electric slide rail (52). One end of the flipping seat (532) is fixedly mounted on the middle of the other end of the force-applying arm (531), and the two ends of the flipping seat (532) can be flipped relative to each other. The clamping plate (533) is fixedly mounted on the other end of the flipping seat (532). A pair of third springs (534) are symmetrically mounted between the other end of the force-applying arm (531) and the clamping plate (533). The pair of third springs (534) are located on both sides of the flipping seat (532) and are symmetrical.

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