Blade strength detection device for wind driven generator

Abstract

The invention discloses a strength detection device of a blade for a wind driven generator, which relates to the technical field of wind driven generator production and comprises a supporting seat, a detection table welded with the supporting seat through four annularly distributed reinforcing ribs, a rotation detection mechanism, a variable strength detection mechanism, a variable bending detection mechanism and a surface damage detection mechanism, the rotation detection mechanism comprises a driving assembly, an electric telescopic rod, a connecting piece and three blade bodies, wherein the three blade bodies are fixed to the connecting piece through bolts and distributed annularly. According to the invention, rotation stress strength detection, compressive strength detection and bending strength detection can be carried out in order, comprehensive evaluation on the strength of the wind driven generator blade is provided, the safety and reliability of the blade in actual operation are ensured, accident risks caused by insufficient strength of the blade are reduced, and by integrating multiple detection functions, the detection efficiency is improved. The blade transfer procedure is omitted, a plurality of key parameters can be obtained in one-time detection, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine production, and in particular to a strength detection device for blades of wind turbines. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current. During the production of the blades used in wind turbines, the strength of the blades needs to be tested to evaluate the structural strength and stability of the blades.

[0003] The existing strength testing methods for wind turbine blades mainly focus on three processes: rotational force strength testing, compressive strength testing and bending strength testing. However, the existing strength testing devices are generally unable to test multiple position areas of the blades when performing compressive strength testing and bending strength testing, which leads to unsatisfactory testing results. In addition, the existing strength testing devices have a single function and generally only have one testing process. In order to achieve comprehensive testing, the blades must be transferred to multiple strength testing devices. In this way, multiple key parameters cannot be obtained in one test, which will seriously affect the testing efficiency. Summary of the invention

[0004] The object of the present invention is to provide a strength detection device for blades of a wind turbine in order to solve the above-mentioned problem.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A strength detection device for a blade of a wind turbine generator, comprising a support base and a detection platform welded to the support base through four annularly distributed reinforcing ribs, and also comprising a rotation detection mechanism, a variable position strength detection mechanism, a variable position bending detection mechanism and a surface damage detection mechanism;

[0007] The rotation detection mechanism includes a driving assembly, an electric telescopic rod rotatably mounted at the center of the top of the detection platform, a connecting piece coaxially fixed to the telescopic end of the electric telescopic rod, and three blade bodies fixed to the connecting piece by bolts and distributed in an annular shape;

[0008] The driving assembly includes a stepper motor fixedly mounted on the outer wall of the bottom of the test bench, a driving bevel gear fixedly sleeved on the output shaft of the stepper motor, and a driven bevel gear fixedly sleeved on the lower part of the electric telescopic rod;

[0009] The variable position strength detection mechanism comprises a blade placement block fixedly connected to the top outer wall of the detection platform, a No. 1 frame welded to the top outer wall of the blade placement block, a No. 1 fixing plate welded to the upper outer wall of one side of the No. 1 frame, and a No. 1 servo motor fixedly installed on the top outer wall of the No. 1 fixing plate;

[0010] The variable position strength detection mechanism also includes a No. 1 lead screw, a No. 1 sliding seat threadedly connected to the No. 1 lead screw, a cylinder fixedly mounted on the outer wall of the bottom of the No. 1 sliding seat, a pressure sensor fixed to the bottom end of the cylinder piston rod, a connecting frame fixedly connected to the bottom of the pressure sensor, and a pressure wheel fixedly mounted in the connecting frame;

[0011] The variable position bending detection mechanism includes a No. 2 frame fixedly connected to the top outer wall of the detection platform, a No. 2 fixing plate welded to the upper outer wall of one side of the No. 2 frame, and a No. 2 servo motor fixedly installed on the top outer wall of the No. 2 fixing plate;

[0012] The variable position bending detection mechanism also includes a No. 2 lead screw, a No. 2 sliding seat threadedly connected to the No. 2 lead screw, a hydraulic rod hinged to the bottom of the No. 2 sliding seat, a roller frame hinged to the telescopic end of the hydraulic rod, and a lower pressure roller fixedly installed in the roller frame.

[0013] As a preferred technical solution of the present invention, two mounting plates are symmetrically welded to the circumferential outer wall of the detection platform, and the top outer walls of the two mounting plates are sequentially mounted with an industrial computer and a frequency converter.

[0014] As an optimal technical solution of the present invention, two No. 1 bearing seats are symmetrically fixed on the top lower side wall of the No. 1 frame, and the No. 1 lead screw is rotatably installed on the two No. 1 bearing seats, and one end of the No. 1 lead screw passes through one side of the No. 1 frame and is coaxially fixedly connected to the output shaft of the No. 1 servo motor through a coupling.

[0015] As a preferred technical solution of the present invention, the active bevel gear and the driven bevel gear are meshed with each other, and an electric slip ring is installed at the lower part of the electric telescopic rod. Two No. 1 slideways are opened above the No. 1 frame, and the two No. 1 slideways are slidably connected to the No. 1 sliding seat.

[0016] As an optimal technical solution of the present invention, two No. 2 bearing seats are symmetrically fixed on the top lower side wall of the No. 2 frame, and the No. 2 lead screw is rotatably installed on the two No. 2 bearing seats, and one end of the No. 2 lead screw passes through one side of the No. 2 frame and is coaxially fixedly connected to the output shaft of the No. 2 servo motor through a coupling.

[0017] As a preferred technical solution of the present invention, two No. 2 slideways are provided above the No. 2 frame, both No. 2 slideways are slidably connected to the No. 2 sliding seat, and an avoidance opening is provided on the inspection table directly below the No. 2 screw.

[0018] As an optimal technical solution of the present invention, the surface damage detection mechanism includes a multifunctional detection component, a No. 3 frame fixedly connected to the top outer wall of the detection platform, a No. 3 fixed plate welded to the upper outer wall of one side of the No. 3 frame, a No. 3 servo motor fixedly installed on the top outer wall of the No. 3 fixed plate, a No. 3 lead screw, a No. 3 sliding seat threadedly connected to the No. 3 lead screw, and an electric push rod fixedly installed on the bottom outer wall of the No. 3 sliding seat.

[0019] As an optimal technical solution of the present invention, the multifunctional detection component includes a connecting block fixedly connected to the telescopic end of the electric push rod, an industrial camera fixedly installed on the bottom outer wall of the connecting block, an infrared thermal imager fixedly installed on the outer wall of one side of the connecting block, and an ultrasonic detector fixedly installed on the outer wall of the other side of the connecting block.

[0020] As an optimal technical solution of the present invention, two No. 3 bearing seats are symmetrically fixed on the top lower side wall of the No. 3 frame, and the No. 3 lead screw is rotatably installed on the two No. 3 bearing seats, and one end of the No. 3 lead screw passes through one side of the No. 3 frame and is coaxially fixedly connected to the output shaft of the No. 3 servo motor through a coupling.

[0021] As a preferred technical solution of the present invention, two No. 3 slideways are provided above the No. 3 frame, and the two No. 3 slideways are both slidably connected to the No. 3 sliding seat.

[0022] The beneficial effects of the present invention are:

[0023] 1. When the present invention performs rotational force strength detection, the speed of the stepper motor is gradually adjusted by the frequency converter, so as to simulate the force conditions of the wind turbine blades under different speed conditions, and then test the strength of the blades;

[0024] 2. When performing compressive strength testing, the present invention can flexibly adjust the testing position of the blade body, thereby being able to perform a more comprehensive strength test on the surface of the blade body, which is beneficial to improving the testing effect;

[0025] 3. When performing bending strength testing, the present invention can flexibly adjust the testing position of the blade body, which is convenient for performing bending testing on multiple positions of the blade body, thereby facilitating more comprehensive acquisition of the bending characteristics of the wind turbine blade at different positions, thereby improving the comprehensiveness of the testing;

[0026] 4. Through the setting of the surface damage detection mechanism, the present invention can accurately detect the actual situation of the wind turbine blades after the three processes of rotational force strength test, compressive strength test and bending strength test, and can intuitively display the test data on the industrial computer, so as to facilitate the inspection personnel to intuitively analyze and evaluate the strength of the wind turbine blades.

[0027] To sum up: the strength detection device for wind turbine blades proposed in the present invention can perform rotational force strength detection, compressive strength detection and bending strength detection in an orderly manner, can simulate various stress conditions that wind turbine blades may encounter in actual operation, and provide a comprehensive evaluation of the strength of wind turbine blades, which helps to ensure the safety and reliability of the blades in actual operation, reduce the risk of accidents caused by insufficient blade strength, and by integrating multiple detection functions, the blade transportation process is eliminated, multiple key parameters can be obtained in one detection, and the detection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall front-view three-dimensional structure of the present invention;

[0029] Figure 2 This is a front view schematic diagram of the structure of the present invention after the support base is removed;

[0030] Figure 3 It is a three-dimensional enlarged structural schematic diagram of the rotation detection mechanism in the present invention;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of the working state of the variable position intensity detection mechanism in the present invention;

[0032] Figure 5 It is a three-dimensional enlarged structural schematic diagram of some parts of the variable position intensity detection mechanism in the present invention;

[0033] Figure 6 It is a schematic diagram of the three-dimensional structure of the variable position bending detection mechanism in the present invention in a working state;

[0034] Figure 7 It is a side view structural schematic diagram of the variable position bending detection mechanism in the present invention;

[0035] Figure 8 It is a three-dimensional enlarged structural schematic diagram of some parts of the variable position bending detection mechanism in the present invention;

[0036] Fig. 9 It is a schematic diagram of the three-dimensional structure of the surface damage detection mechanism of the present invention in a working state;

[0037] Fig.10 It is a three-dimensional enlarged structural schematic diagram of some parts of the surface damage detection mechanism in the present invention.

[0038] In the figure: 1. Support seat; 2. Test table; 3. Electric telescopic rod; 4. Connector; 5. Blade body; 6. Stepper motor; 7. Active bevel gear; 8. Driven bevel gear; 9. Blade placement block; 10. No. 1 frame; 11. No. 1 fixed plate; 12. No. 1 servo motor; 13. No. 1 lead screw; 14. No. 1 sliding seat; 15. Cylinder; 16. Pressure sensor; 17. Connecting frame; 18. Pressure wheel; 19. No. 2 frame; 20. No. 2 fixed plate; 21. No. 2 servo motor; 22. No. 2 fixed plate; 23. No. 2 fixed plate; 24. No. 2 fixed plate; 25. No. 2 fixed plate; 26. No. 2 fixed plate; 27. No. 2 fixed plate; 28. No. 2 fixed plate; 29. ​​No. 2 fixed plate; 30. No. 2 fixed plate; 31. No. 2 fixed plate; 32. No. 2 fixed plate; 33. No. 2 fixed plate; 34. No. 2 fixed plate; 35. No. 2 fixed plate; 36. No. 2 fixed plate; 37. No. 2 fixed plate; 38. No. 2 fixed plate; 39. No. 2 fixed plate; 40. No. 2 fixed plate; 41. No. 2 fixed plate; 42. No. 2 fixed plate; 43. No. 2 fixed plate; 44. No. 2 fixed plate; 45. No. 2 fixed plate; 46. No. 2 fixed plate; 47. No. 2 fixed plate; 48. No. 2 fixed plate; 49. No. 2 fixed plate; 50. No. 2 fixed plate; 51 Servo motor; 22. Screw No. 2; 23. Sliding seat No. 2; 24. Hydraulic rod; 25. Roller frame; 26. Lower pressure roller; 27. Avoidance; 28. Frame No. 3; 29. ​​Fixed plate No. 3; 30. Servo motor No. 3; 31. Screw No. 3; 32. Sliding seat No. 3; 33. Electric push rod; 34. Connecting block; 35. Industrial camera; 36. Infrared thermal imager; 37. Ultrasonic detector; 38. Mounting plate; 39. Industrial computer; 40. Frequency converter; 41. Electric slip ring. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Example 1, reference Figure 1-3 , a strength detection device for a blade of a wind turbine generator, comprising a support base 1, a detection platform 2 welded to the support base 1 through four annularly distributed reinforcing ribs, and a rotating detection mechanism;

[0041] Specifically, the rotation detection mechanism includes a driving assembly, an electric telescopic rod 3 rotatably mounted at the top center of the detection platform 2, a connecting piece 4 coaxially fixed to the telescopic end of the electric telescopic rod 3, and three blade bodies 5 fixed to the connecting piece 4 by bolts and distributed in an annular shape;

[0042] More specifically, the driving assembly includes a stepper motor 6 fixedly mounted on the outer wall of the bottom of the test platform 2, a driving bevel gear 7 fixedly sleeved on the output shaft of the stepper motor 6, and a driven bevel gear 8 fixedly sleeved on the lower part of the electric telescopic rod 3, and the driving bevel gear 7 and the driven bevel gear 8 are meshed with each other;

[0043] Furthermore, two mounting plates 38 are symmetrically welded to the circumferential outer wall of the detection platform 2, and an industrial computer 39 and a frequency converter 40 are sequentially mounted on the top outer walls of the two mounting plates 38. The frequency converter 40 can adjust the speed of the stepper motor 6, and an electric slip ring 41 is mounted on the lower part of the electric telescopic rod 3, which facilitates the normal power supply of the electric telescopic rod 3 in the rotating state.

[0044] In the specific implementation of this embodiment: in the first detection stage, the driving bevel gear 7 is controlled to rotate by the stepper motor 6, and then the driven bevel gear 8 meshing with the driving bevel gear 7 drives the three blade bodies 5 on the electric telescopic rod 3 to rotate, and the speed of the stepper motor 6 is gradually adjusted by the inverter 20, so as to simulate the force conditions of the wind turbine blades under different speeds, and then test the strength of the blades.

[0045] Example 2, reference Figure 1-2 and Figure 4-5 , This embodiment is optimized on the basis of embodiment 1, specifically: a strength detection device for a blade of a wind turbine generator, further comprising a variable position strength detection mechanism;

[0046] Specifically, the variable position strength detection mechanism includes a blade placement block 9 fixedly connected to the top outer wall of the detection platform 2, a No. 1 frame 10 welded to the top outer wall of the blade placement block 9, a No. 1 fixed plate 11 welded to the upper outer wall of one side of the No. 1 frame 10, a No. 1 servo motor 12 fixedly installed on the top outer wall of the No. 1 fixed plate 11, a No. 1 lead screw 13, a No. 1 sliding seat 14 threadedly connected to the No. 1 lead screw 13, a cylinder 15 fixedly installed on the bottom outer wall of the No. 1 sliding seat 14, a pressure sensor 16 fixed to the bottom end of the piston rod of the cylinder 15, a connecting frame 17 fixedly connected to the bottom of the pressure sensor 16 and a pressure wheel 18 fixedly installed in the connecting frame 17;

[0047] Furthermore, two No. 1 bearing seats are symmetrically fixed on the top lower side wall of the No. 1 frame 10, and the No. 1 lead screw 13 is rotatably installed on the two No. 1 bearing seats. One end of the No. 1 lead screw 13 passes through one side of the No. 1 frame 10 and is coaxially fixedly connected with the output shaft of the No. 1 servo motor 12 through a coupling, so as to ensure that the No. 1 servo motor 12 drives the No. 1 lead screw 13 to rotate stably. Two No. 1 slideways are arranged above the No. 1 frame 10, and the two No. 1 slideways are both slidably connected with the No. 1 sliding seat 14, so as to ensure that the No. 1 sliding seat 14 threadedly connected with the No. 1 lead screw 13 can make linear motion, and the cylinder 15 and the pressure sensor 16 are both controlled by the industrial computer 39;

[0048] During the specific implementation of this embodiment: after the first detection stage is completed, a blade body 5 to be detected is rotated to the variable position strength detection mechanism area through the rotating detection mechanism. At this time, the blade body 5 is controlled to move downward through the electric telescopic rod 3 so that it is placed on the blade placement block 9. Then, the pressure is input into the industrial computer 39, and the pressure wheel 18 is controlled to move downward through the cylinder 15 to continuously apply pressure to the blade body 5. When the pressure sensor 16 detects that the pressure intensity has been reached, the cylinder 15 stops applying pressure and raises the pressure wheel 18 to its original position. Then, the No. 1 servo motor 12 controls the No. 1 lead screw 13 to rotate. Then, under the limit of the slideway, the No. 1 sliding seat 14 threadedly connected to the No. 1 lead screw 13 will drive the pressure wheel 18 to move in an orderly manner to the next detection area. In this way, the detection position of the blade body 5 can be flexibly adjusted, so that the surface of the blade body 5 can be subjected to a more comprehensive strength detection, which is beneficial to improving the detection effect.

[0049] Example 3, reference Figure 1 and Figure 6-8 , This embodiment is optimized on the basis of embodiment 1, specifically: a strength detection device for a blade of a wind turbine generator, further comprising a variable position bending detection mechanism;

[0050] Specifically, the variable position bending detection mechanism includes a No. 2 frame 19 fixedly connected to the top outer wall of the detection platform 2, a No. 2 fixed plate 20 welded to the upper outer wall of one side of the No. 2 frame 19, a No. 2 servo motor 21 fixedly installed on the top outer wall of the No. 2 fixed plate 20, a No. 2 lead screw 22, a No. 2 sliding seat 23 threadedly connected to the No. 2 lead screw 22, a hydraulic rod 24 hinged to the bottom of the No. 2 sliding seat 23, a roller frame 25 hinged to the telescopic end of the hydraulic rod 24, and a downward pressing roller 26 fixedly installed in the roller frame 25. The detection platform 2 is provided with an avoidance opening 27 located directly below the No. 2 lead screw 22, which is used for the blade body 5 to avoid the downward pressing bending action;

[0051] Furthermore, two No. 2 bearing seats are symmetrically fixed on the top lower side wall of the No. 2 frame 19, and the No. 2 lead screw 22 is rotatably installed on the two No. 2 bearing seats. One end of the No. 2 lead screw 22 passes through one side of the No. 2 frame 19 and is coaxially fixedly connected with the output shaft of the No. 2 servo motor 21 through a coupling, so that the No. 2 servo motor 21 can drive the No. 2 lead screw 22 to rotate stably. Two No. 2 slideways are provided above the No. 2 frame 19, and the two No. 2 slideways are both slidably connected with the No. 2 sliding seat 23, so that the No. 2 sliding seat 23 threadedly connected to the No. 2 lead screw 22 can be guaranteed to perform linear motion;

[0052] During the specific implementation of this embodiment: after the second detection stage is completed, a blade body 5 to be detected is rotated to the variable position bending detection mechanism area through the rotating detection mechanism, and at this time, the lower pressure roller 26 is controlled by the hinged hydraulic rod 24 to continuously reciprocate up and down, so that repeated bending detection can be performed on a certain detection position of the blade body 5 to be detected, and the No. 2 servo motor 21 is used to control the rotation of the No. 2 lead screw 22, and then under the limit of the slide, the No. 2 sliding seat 23 threadedly connected to the No. 2 lead screw 22 will drive the hydraulic rod 24 and the lower pressure roller 26 to move in an orderly manner, so that the detection position of the blade body 5 can be flexibly adjusted, which is convenient for bending detection of multiple positions of the blade body 5, thereby facilitating a more comprehensive acquisition of the bending characteristics of the wind turbine blades at different positions, thereby improving the comprehensiveness of the detection.

[0053] Example 4, reference Figure 1-2 and Figure 9-10 This embodiment is optimized on the basis of the embodiment 1, specifically: a strength detection device for a blade of a wind turbine generator, further comprising a surface damage detection mechanism;

[0054] Specifically, the surface damage detection mechanism includes a multifunctional detection component, a No. 3 frame 28 fixedly connected to the top outer wall of the detection platform 2, a No. 3 fixing plate 29 welded to the upper outer wall of one side of the No. 3 frame 28, a No. 3 servo motor 30 fixedly installed on the top outer wall of the No. 3 fixing plate 29, a No. 3 lead screw 31, a No. 3 sliding seat 32 threadedly connected to the No. 3 lead screw 31, and an electric push rod 33 fixedly installed on the bottom outer wall of the No. 3 sliding seat 32;

[0055] More specifically, the multifunctional detection assembly includes a connection block 34 fixedly connected to the telescopic end of the electric push rod 33, an industrial camera 35 fixedly installed on the outer wall of the bottom of the connection block 34, an infrared thermal imager 36 fixedly installed on the outer wall of one side of the connection block 34, and an ultrasonic detector 37 fixedly installed on the outer wall of the other side of the connection block 34;

[0056] When the multifunctional detection component is in use, the industrial camera 35 transmits the collected visual image information to the industrial computer 39, the infrared thermal imager 36 transmits the infrared imaging information of the surface of the blade body 5 to the industrial computer 39, and the ultrasonic detector 37 transmits the ultrasonic data of the surface of the blade body 5 to the industrial computer 39. In this way, through diversified detection methods, the industrial computer 39 can integrate visual image data, infrared thermal imaging data and ultrasonic data, and can more intuitively simulate the deformation and stress conditions inside the blade;

[0057] Furthermore, two No. 3 bearing seats are symmetrically fixed on the top lower side wall of the No. 3 frame 28, and the No. 3 lead screw 31 is rotatably installed on the two No. 3 bearing seats. One end of the No. 3 lead screw 31 passes through one side of the No. 3 frame 28 and is coaxially fixedly connected with the output shaft of the No. 3 servo motor 30 through a coupling, so that the No. 3 servo motor 30 can drive the No. 3 lead screw 31 to rotate stably. Two No. 3 slideways are provided above the No. 3 frame 28, and the two No. 3 slideways are both slidably connected with the No. 3 sliding seat 32, so that the No. 3 sliding seat 32 threadedly connected with the No. 3 lead screw 31 can be guaranteed to perform linear motion;

[0058] During the specific implementation of this embodiment: after the third detection stage is completed, a blade body 5 to be detected is rotated to the surface damage detection mechanism area through the rotating detection mechanism. At this time, the detection height of the multifunctional detection component can be flexibly adjusted through the electric push rod 33. After the adjustment is completed, the No. 3 servo motor 30 controls the rotation of the No. 3 lead screw 31. Then, under the limit of the No. 3 slide, the No. 3 sliding seat 32 threadedly connected to the No. 3 lead screw 31 will drive the multifunctional detection component to reciprocate in the horizontal direction. After the three detection processes are completed, this embodiment facilitates the full and uniform detection of defects and damages on the surface of the blade body 5, so that the actual situation of the wind turbine blade after the three processes of rotational force strength detection, compressive strength detection and bending strength detection can be accurately detected, and the detection data can be intuitively displayed on the industrial computer 39, which can facilitate the detection personnel to intuitively analyze and evaluate the strength of the wind turbine blade.

[0059] The use process of the present invention is as follows: in the first test stage, the driving bevel gear 7 is controlled to rotate by the stepper motor 6, and then the driven bevel gear 8 meshing with the driving bevel gear 7 drives the three blade bodies 5 on the electric telescopic rod 3 to rotate, and the speed of the stepper motor 6 is gradually adjusted by the frequency converter 20, so as to simulate the force of the wind turbine blade under different speed conditions, and then test the strength of the blade;

[0060] In the second test stage, a blade body 5 to be tested is rotated to the area of ​​the variable position strength testing mechanism through the rotating testing mechanism. At this time, the blade body 5 is controlled to move downward by the electric telescopic rod 3 so that it is placed on the blade placement block 9. Then, the pressure is input into the industrial computer 39, and the pressure wheel 18 is controlled to move downward by the cylinder 15 to continuously apply pressure to the blade body 5. When the pressure sensor 16 detects that the pressure intensity has been reached, the cylinder 15 stops applying pressure and raises the pressure wheel 18 to its original position. Then, the No. 1 servo motor 12 controls the No. 1 lead screw 13 to rotate. Then, under the limit of the slideway, the No. 1 sliding seat 14 threadedly connected to the No. 1 lead screw 13 drives the pressure wheel 18 to move to the next testing area in an orderly manner. In this way, the testing position of the blade body 5 can be flexibly adjusted, so that the surface of the blade body 5 can be subjected to a more comprehensive strength test, which is conducive to improving the testing effect.

[0061] In the third test stage, a blade body 5 to be tested is rotated to the variable bending test mechanism area through the rotating test mechanism. At this time, the hinged hydraulic rod 24 controls the lower pressure roller 26 to continuously reciprocate up and down, so that a certain test position of the blade body 5 to be tested can be repeatedly tested for bending, and the No. 2 servo motor 21 controls the No. 2 lead screw 22 to rotate. Then, under the limit of the slideway, the No. 2 sliding seat 23 threadedly connected to the No. 2 lead screw 22 drives the hydraulic rod 24 and the lower pressure roller 26 to move in an orderly manner, so that the test position of the blade body 5 can be flexibly adjusted, which is convenient for the bending test of multiple positions of the blade body 5, so as to facilitate more comprehensive acquisition of the bending characteristics of the wind turbine blades at different positions, thereby improving the comprehensiveness of the test;

[0062] In the fourth test stage, a blade body 5 to be tested is rotated to the surface damage detection mechanism area through the rotating detection mechanism. At this time, the detection height of the multifunctional detection component can be flexibly adjusted by the electric push rod 33. After the adjustment is completed, the No. 3 servo motor 30 controls the No. 3 screw 31 to rotate, and then under the limit of the No. 3 slide, the No. 3 sliding seat 32 threadedly connected to the No. 3 screw 31 will drive the multifunctional detection component to reciprocate in the horizontal direction. After the three detection processes are completed, it is convenient to fully and evenly detect the defects and damages on the surface of the blade body 5, so that the actual situation of the wind turbine blade after the three processes of rotational force strength test, compressive strength test and bending strength test can be accurately detected, and the detection data can be intuitively displayed on the industrial computer 39, which can facilitate the detection personnel to intuitively analyze and evaluate the strength of the wind turbine blade. In addition, the same detection of the other two blade bodies 5 can be continued according to the test methods of the second test stage, the third test stage and the fourth test stage.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A strength detection device for a blade of a wind turbine generator, comprising a support base (1) and a detection platform (2) welded to the support base (1) via four annularly distributed reinforcing ribs, characterized in that: It also includes a rotation detection mechanism, a variable position strength detection mechanism, a variable position bending detection mechanism and a surface damage detection mechanism; The rotation detection mechanism comprises a driving assembly, an electric telescopic rod (3) rotatably mounted at the top center of the detection platform (2), a connecting piece (4) coaxially fixed to the telescopic end of the electric telescopic rod (3), and three blade bodies (5) fixed to the connecting piece (4) by bolts and distributed in an annular shape; The driving assembly comprises a stepping motor (6) fixedly mounted on the outer wall of the bottom of the detection platform (2), an active bevel gear (7) fixedly sleeved on the output shaft of the stepping motor (6), and a driven bevel gear (8) fixedly sleeved on the lower part of the electric telescopic rod (3); The variable position strength detection mechanism comprises a blade placement block (9) fixedly connected to the top outer wall of the detection platform (2), a No. 1 frame (10) welded to the top outer wall of the blade placement block (9), a No. 1 fixing plate (11) welded to the upper outer wall of one side of the No. 1 frame (10), and a No. 1 servo motor (12) fixedly mounted on the top outer wall of the No. 1 fixing plate (11); The variable position strength detection mechanism also includes a first lead screw (13), a first sliding seat (14) threadedly connected to the first lead screw (13), a cylinder (15) fixedly mounted on the outer wall of the bottom of the first sliding seat (14), a pressure sensor (16) fixed to the bottom end of the piston rod of the cylinder (15), a connecting frame (17) fixedly connected to the bottom of the pressure sensor (16), and a pressure wheel (18) fixedly mounted in the connecting frame (17); The variable position bending detection mechanism comprises a second frame (19) fixedly connected to the top outer wall of the detection platform (2), a second fixing plate (20) welded to the upper outer wall of one side of the second frame (19), and a second servo motor (21) fixedly mounted on the top outer wall of the second fixing plate (20); The variable position bending detection mechanism also includes a No. 2 lead screw (22), a No. 2 sliding seat (23) threadedly connected to the No. 2 lead screw (22), a hydraulic rod (24) hinged to the bottom of the No. 2 sliding seat (23), a roller frame (25) hinged to the telescopic end of the hydraulic rod (24), and a lower pressure roller (26) fixedly installed in the roller frame (25).

2. A wind turbine blade strength detection device according to claim 1, characterized in that: Two mounting plates (38) are symmetrically welded to the circumferential outer wall of the detection platform (2), and an industrial control computer (39) and a frequency converter (40) are sequentially mounted on the top outer walls of the two mounting plates (38).

3. A wind turbine blade strength detection device according to claim 1, characterized in that: Two No. 1 bearing seats are symmetrically fixed on the top lower side wall of the No. 1 frame (10), and the No. 1 lead screw (13) is rotatably mounted on the two No. 1 bearing seats, and one end of the No. 1 lead screw (13) passes through one side of the No. 1 frame (10) and is coaxially fixedly connected to the output shaft of the No. 1 servo motor (12) through a coupling.

4. A wind turbine blade strength detection device according to claim 1, characterized in that: The active bevel gear (7) and the driven bevel gear (8) are meshed with each other, and an electric slip ring (41) is installed at the bottom of the electric telescopic rod (3). Two No. 1 slideways are provided above the No. 1 frame (10), and the two No. 1 slideways are both slidably connected to the No. 1 sliding seat (14).

5. The wind turbine blade strength detection device according to claim 1, characterized in that: Two No. 2 bearing seats are symmetrically fixed on the top lower side wall of the No. 2 frame (19), and the No. 2 lead screw (22) is rotatably mounted on the two No. 2 bearing seats, and one end of the No. 2 lead screw (22) passes through one side of the No. 2 frame (19) and is coaxially fixedly connected to the output shaft of the No. 2 servo motor (21) through a coupling.

6. A wind turbine blade strength detection device according to claim 1, characterized in that: Two No. 2 slideways are provided above the No. 2 frame (19), and both No. 2 slideways are slidably connected to the No. 2 sliding seat (23), and a avoidance opening (27) located directly below the No. 2 lead screw (22) is provided on the inspection platform (2).

7. A wind turbine blade strength detection device according to claim 1, characterized in that: The surface damage detection mechanism comprises a multifunctional detection component, a No. 3 frame (28) fixedly connected to the top outer wall of the detection platform (2), a No. 3 fixing plate (29) welded to the upper outer wall of one side of the No. 3 frame (28), a No. 3 servo motor (30) fixedly mounted on the top outer wall of the No. 3 fixing plate (29), a No. 3 lead screw (31), a No. 3 sliding seat (32) threadedly connected to the No. 3 lead screw (31), and an electric push rod (33) fixedly mounted on the bottom outer wall of the No. 3 sliding seat (32).

8. A wind turbine blade strength detection device according to claim 7, characterized in that: The multifunctional detection assembly comprises a connection block (34) fixedly connected to the telescopic end of the electric push rod (33), an industrial camera (35) fixedly mounted on the outer wall at the bottom of the connection block (34), an infrared thermal imager (36) fixedly mounted on the outer wall of one side of the connection block (34), and an ultrasonic detector (37) fixedly mounted on the outer wall of the other side of the connection block (34).

9. A wind turbine blade strength detection device according to claim 7, characterized in that: Two No. 3 bearing seats are symmetrically fixed on the top lower side wall of the No. 3 frame (28), and the No. 3 lead screw (31) is rotatably mounted on the two No. 3 bearing seats, and one end of the No. 3 lead screw (31) passes through one side of the No. 3 frame (28) and is coaxially fixedly connected to the output shaft of the No. 3 servo motor (30) through a coupling.

10. A wind turbine blade strength detection device according to claim 7, characterized in that: Two No. 3 slideways are arranged above the No. 3 frame (28), and both No. 3 slideways are slidably connected to the No. 3 sliding seat (32).

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