Crack detection device for wind power main shaft bearing forge piece and identification method of crack detection device

Abstract

The crack detection device comprises a table body, a bearing plate is fixedly installed at the right end of the front surface of the table body, and an ultrasonic flaw detector and a PLC are sequentially and fixedly installed on the surface of the bearing plate from top to bottom; a driving motor is fixedly installed at the left end of the bottom of the table body, a first gear is fixedly installed at the output end of the driving motor, and an annular base is fixedly installed at the left end of the top of the table body. The driving motor drives the first gear and the gear ring to rotate, so that the detection table and the bearing forge piece rotate synchronously, the first servo electric cylinder is matched to drive the probe to move up and down, the second servo electric cylinder pushes the probe to be attached to the surface of the forge piece, and an automatic flaw detection mode of rotating detection and automatic lifting is formed. The detection time consumption of the large-size wind power main shaft bearing forged piece is greatly shortened, and the efficient detection requirement of large-scale production is met.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment testing technology, specifically to a crack detection device and identification method for wind turbine main shaft bearing forgings. Background Technology

[0002] As a core load-bearing component of wind turbine main shaft bearings, surface and internal cracks in wind turbine main shaft bearings directly affect the operational safety of the equipment. Therefore, flaw detection is necessary to ensure product quality. Currently, the industry mostly uses ultrasonic flaw detectors to detect cracks in these forgings. During operation, personnel need to hold the probe and place it against the surface of the bearing forging in sequence to complete a comprehensive inspection. However, because wind turbine main shaft bearing forgings are usually large in size and weight, handheld flaw detection is time-consuming and inefficient. Moreover, the long-term handheld probe movement significantly increases the labor intensity of operators, making it difficult to meet the high-efficiency inspection requirements of large-scale production. Summary of the Invention

[0003] The purpose of this invention is to provide a crack detection device and identification method for wind turbine main shaft bearing forgings. It can automatically perform comprehensive flaw detection on wind turbine main shaft bearing forgings. The operation is convenient and quick, without the need for manual operation, which improves the efficiency of the inspection operation and reduces the labor intensity of personnel.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a crack detection device for wind turbine main shaft bearing forgings, comprising a platform, a bearing plate fixedly installed on the right end of the front surface of the platform, an ultrasonic flaw detector and a PLC controller fixedly installed sequentially from top to bottom on the surface of the bearing plate, a drive motor fixedly installed on the left end of the bottom of the platform, a first gear fixedly installed at the output end of the drive motor, an annular seat fixedly installed on the left end of the top of the platform, a detection platform arranged above the annular seat, a gear ring fixedly installed at the lower end of the inner cavity of the detection platform, the gear ring meshing with the first gear, a magnetic block fixedly installed on the left side of the outer surface of the detection platform, a Hall sensor arranged to the left of the magnetic block, a fixed frame fixedly installed on the right end of the top of the platform, a first servo cylinder fixedly installed on the top of the fixed frame, a movable frame fixedly installed at the output end of the first servo cylinder, a second servo cylinder fixedly installed on the surface of the movable frame, a pressure spring fixedly installed at the output end of the second servo cylinder, a movable frame fixedly installed to the left of the pressure spring, and a probe fixedly installed to the left of the movable frame.

[0005] As a preferred embodiment, a rotating shaft is movably connected to the middle of the top of the testing platform via a bearing. A fixed plate is fixedly connected to the upper end of the rotating shaft, and a drive plate is fixedly connected to the lower end of the rotating shaft. There are three drive plates. Three guide crossbars are fixedly installed on the top of the testing platform. A clamping plate is slidably connected to the surface of the guide crossbar. A push rod is movably connected between the lower end of the clamping plate and one end of the drive plate via a bearing. A third servo electric cylinder is movably connected to the right end of the top of the outer surface of the testing platform via a bearing. The output end of the third servo electric cylinder is hinged to one end of the fixed plate via a pin. The third servo electric cylinder is electrically connected to the PLC controller.

[0006] As a preferred embodiment, a rotating rod is movably connected to the right end of the platform via a bearing. A second gear is fixedly installed on the top of the rotating rod, and the second gear meshes with a gear ring. An air supply box is fixedly installed at the right end of the bottom of the platform. There are two air supply boxes. An exhaust one-way valve and an intake one-way valve are fixedly installed sequentially from top to bottom on the side of the two air supply boxes that are far apart from each other. A guide pipe is fixedly installed between the output ends of the two exhaust one-way valves. A flow guide is fixedly installed between the upper end of the guide pipe and the left end of the front surface of the movable frame. A liquid guide is fixedly installed at the upper end of the guide pipe and to the right of the flow guide. A container is placed at the right end of the top of the platform and in front of the fixed frame. The lower end of the liquid guide is placed in the inner cavity of the container.

[0007] As a preferred embodiment, an L-shaped rod is fixedly connected to the bottom of the rotating rod, a piston is slidably connected to the inner cavity of the air supply box, a fixing rod is fixedly installed on the side of the two pistons that are close to each other, an adjusting plate is fixedly connected between the side of the two fixing rods that are close to each other, a through groove is opened in the middle of the adjusting plate, and the lower end of the L-shaped rod is slidably connected to the surface of the through groove.

[0008] As a preferred embodiment, a rubber sealing ring is fixedly installed at the middle end of the piston, and the surface of the rubber sealing ring is slidably connected to the inner cavity of the gas delivery box. Guide frames are slidably connected to both ends of the adjusting plate, and the surfaces of the guide frames are fixedly installed on the outer surface of the gas delivery box.

[0009] As a preferred embodiment, a support plate is fixedly installed at the left end of the top of the platform and to the left of the annular seat. The surface of the Hall sensor is fixedly installed on the upper end of the support plate. A movable ball is embedded in the top of the annular seat, and the bottom of the detection platform is slidably connected to the top of the movable ball.

[0010] As a preferred embodiment, guide rods are fixedly installed on both sides of the fixed frame, the surface of the movable frame is slidably connected to the surface of the guide rods, and limit rods are fixedly installed at both ends of the right side of the movable frame, the surface of the limit rods being slidably connected to the surface of the movable frame.

[0011] As a preferred embodiment, a support frame is fixedly installed around the bottom of the platform, and a load-bearing base plate is fixedly connected to the bottom of the support frame around its four sides.

[0012] As a preferred embodiment, the ultrasonic flaw detector is electrically connected to the probe, and the PLC controller is electrically connected to the drive motor, the Hall sensor, the first servo cylinder, and the second servo cylinder.

[0013] A method for identifying cracks in wind turbine main shaft bearing forgings using a crack detection device, comprising the following steps: A. First, after the wind turbine main shaft bearing forging to be inspected is hoisted to the top of the inspection table, the third servo electric cylinder is extended by the PLC controller, which can push the fixed plate, the rotating shaft and the drive plate to rotate. The rotation of the drive plate can push the three sets of clamping plates to move through the push rod until the three sets of clamping plates can clamp the inner cavity of the bearing forging synchronously. This avoids the bearing forging from shifting during subsequent inspection and ensures that the bearing forging is centered on the top of the inspection table, so as to facilitate the normal progress of subsequent flaw detection operations. B. Then, the second servo cylinder is extended by the PLC controller, which pushes the pressure spring, movable frame and probe to move to the left so that the probe can fit against the upper surface of the bearing forging. The PLC controller starts the drive motor to drive the first gear to rotate. The rotation of the first gear can drive the gear ring, the inspection table and the bearing forging to rotate, so that the probe can perform ultrasonic testing on different positions of the bearing forging in sequence. The waveform is displayed by the ultrasonic flaw detector so that personnel can judge whether there are cracks or defects inside the bearing forging. C. During the rotation of the inspection table, the magnetic block can be driven to rotate, and the position of the magnetic block can be monitored under the action of the Hall sensor and fed back to the PLC controller. After the magnetic block, the inspection table and the bearing forging rotate one revolution, the PLC controller will control the first servo cylinder to extend according to the preset height, and drive the moving frame, the second servo cylinder, the pressure spring, the movable frame and the probe to move, so as to carry out comprehensive flaw detection work on the bearing forging at different heights. D. During the rotation of the gear ring, it can drive the second gear, rotating rod, and L-shaped rod to rotate. During the rotation of the L-shaped rod, it can push the adjusting plate, fixed rod, and piston to reciprocate through the through slot. Under the action of the piston's reciprocating motion, the air supply box and the air inlet check valve can draw in the outside air, and blow it onto the surface of the bearing forging through the exhaust check valve, air guide pipe, and flow guide shroud. During the rapid flow of compressed air in the air guide pipe, according to the Venturi effect, when the fluid is ejected at high speed, its static pressure will drop sharply. At this time, a low-pressure area will be formed above the liquid guide pipe, so that the water-based coupling agent contained in the container can be drawn into the air guide pipe and mixed with the high-speed airflow to form a mist, which is then sprayed onto the surface of the bearing forging. This ensures the fit between the probe and the bearing forging during flaw detection and avoids affecting the flaw detection accuracy due to the presence of air bubbles.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a drive motor to rotate the first gear and gear ring, causing the inspection table and bearing forging to rotate synchronously. A first servo cylinder drives the probe up and down, while a second servo cylinder pushes the probe to contact the forging surface, forming an automated flaw detection mode of rotational inspection and automatic lifting. Compared to the traditional manual point-by-point inspection method, this significantly reduces the inspection time for the massive wind turbine main shaft bearing forgings, meeting the high-efficiency inspection requirements of large-scale production. Simultaneously, a Hall sensor monitors the rotational position of the magnetic block on the outer surface of the inspection table in real time and feeds the signal back to the PLC controller. When the magnetic block rotates one revolution with the inspection table, the PLC controller automatically triggers the first servo cylinder to extend to a preset height, driving the probe down to the next inspection layer. This ensures the probe covers all height positions of the forging, avoiding omissions in inspection areas that may occur during manual operation, simplifying the operation steps, reducing reliance on operator skills, and improving the ease of use of the device.

[0015] 2. This invention uses a third servo electric cylinder to drive the fixed plate, rotating shaft, and drive plate to rotate. The drive plate, via a push rod, synchronously drives three sets of clamping plates that slide along the guide crossbar to clamp the inner cavity of the bearing forging. This ensures that the bearing forging is centered and fixed on the top of the testing table, preventing the forging from shifting during the testing process and causing probe contact deviation. At the same time, the synchronous movement of the three sets of clamping plates ensures that the bearing forging is subjected to uniform force, preventing the detection position shift caused by unstable fixing, and providing a stable foundation for accurate signal acquisition in subsequent ultrasonic flaw detection.

[0016] 3. This invention utilizes the rotation of a gear ring to drive the second gear, rotating rod, and L-shaped rod to rotate. The L-shaped rod pushes the adjusting plate, fixed rod, and piston to reciprocate within the air supply box through a through groove. Combined with an inlet one-way valve and an exhaust one-way valve, air is extracted and compressed. When the compressed airflow flows through the air guide pipe, a low-pressure zone is formed above the liquid guide pipe based on the Venturi effect, drawing in and atomizing the water-based coupling agent in the container. This agent is then precisely sprayed onto the surface of the bearing forging through a guide shroud. This design eliminates the need for an additional power source for coupling agent spraying, utilizing the kinetic energy of the rotating testing platform to achieve automatic coupling agent supply, which is energy-saving and environmentally friendly. At the same time, the atomized coupling agent can evenly cover the surface of the forging, eliminating the air gap between the probe and the forging, avoiding interference from air bubbles on ultrasonic wave propagation, and significantly improving the accuracy of crack detection. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 3 This is a schematic diagram of the fixing frame structure of the present invention; Figure 4 This is a schematic diagram of the front cross-sectional structure of the testing stage of the present invention; Figure 5 This is a schematic diagram of the detection platform structure of the present invention viewed from below; Figure 6 This is a bottom view of the gas delivery box structure of the present invention; Figure 7 This is a schematic cross-sectional view of the gas delivery box of the present invention.

[0018] In the diagram: 1. Platform; 2. Annular seat; 3. Detection table; 4. Magnetic block; 5. Hall sensor; 6. Support plate; 7. Fixing frame; 8. Container cylinder; 9. Bearing plate; 10. Ultrasonic flaw detector; 11. PLC controller; 12. Drive motor; 13. Support frame; 14. Gas supply box; 15. Gas guide pipe; 16. First servo cylinder; 17. Moving frame; 18. Guide vertical rod; 19. Second servo cylinder; 20. Compression spring; 21. Movable frame; 22. Probe; 23. Flow guide. 24. Liquid guide tube; 25. Limiting rod; 26. First gear; 27. Movable ball; 28. Guide crossbar; 29. ​​Clamping plate; 30. Third servo electric cylinder; 31. Fixing plate; 32. Rotating shaft; 33. Gear ring; 34. Second gear; 35. Rotating rod; 36. Adjusting plate; 37. L-shaped rod; 38. Through groove; 39. Drive plate; 40. Push rod; 41. Guide frame; 42. Fixing rod; 43. Inlet check valve; 44. Exhaust check valve; 45. Piston; 46. Rubber sealing ring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0021] Example 1: Please refer to Figures 1-5 As shown, this invention provides a crack detection device for wind turbine main shaft bearing forgings, including a platform 1. A bearing plate 9 is fixedly installed on the right end of the front surface of the platform 1. An ultrasonic flaw detector 10 and a PLC controller 11 are fixedly installed on the surface of the bearing plate 9 from top to bottom. A drive motor 12 is fixedly installed on the left end of the bottom of the platform 1. A first gear 26 is fixedly installed on the output end of the drive motor 12. An annular seat 2 is fixedly installed on the left end of the top of the platform 1. A detection platform 3 is arranged above the annular seat 2. A toothed ring 33 is fixedly installed on the lower end of the inner cavity of the detection platform 3. The toothed ring 33 and the first gear 26 are connected to the first gear 26. A gear 26 meshes, a magnetic block 4 is fixedly installed on the left side of the outer surface of the detection platform 3, a Hall sensor 5 is set to the left of the magnetic block 4, a fixed frame 7 is fixedly installed on the right end of the top of the platform 1, a first servo electric cylinder 16 is fixedly installed on the top of the fixed frame 7, a movable frame 17 is fixedly installed on the output end of the first servo electric cylinder 16, a second servo electric cylinder 19 is fixedly installed on the surface of the movable frame 17, a pressure spring 20 is fixedly installed on the output end of the second servo electric cylinder 19, a movable frame 21 is fixedly installed on the left side of the pressure spring 20, and a probe 22 is fixedly installed on the left side of the movable frame 21.

[0022] In this technical solution, the drive motor 12 drives the first gear 26 and the gear ring 33 to rotate, causing the inspection table 3 and the bearing forging to rotate synchronously. In conjunction with the first servo cylinder 16 driving the probe 22 to move up and down, and the second servo cylinder 19 pushing the probe 22 to fit against the surface of the forging, an automated flaw detection mode of rotation detection and automatic lifting is formed. Compared with the traditional manual point-by-point inspection method, the inspection time of the massive wind turbine main shaft bearing forging is greatly shortened, meeting the high-efficiency inspection requirements of large-scale production. At the same time, the Hall sensor 5 monitors the rotation position of the magnetic block 4 on the outer surface of the inspection table 3 in real time and feeds the signal back to the PLC controller 11. When the magnetic block 4 rotates one revolution with the inspection table 3, the PLC controller 11 automatically triggers the first servo cylinder 16 to extend to a preset height, driving the probe 22 to move down to the next inspection layer, ensuring that the probe 22 can cover all height positions of the forging, avoiding the omission of inspection areas that may occur during manual operation, simplifying the operation steps, reducing the dependence on the operator's skills, and improving the ease of use of the device.

[0023] Example 2: Based on Example 1, the present invention as follows... Figure 4 and Figure 5 As shown, a rotating shaft 32 is movably connected to the middle of the top of the testing platform 3 via a bearing. A fixed plate 31 is fixedly connected to the upper end of the rotating shaft 32, and a drive plate 39 is fixedly connected to the lower end of the rotating shaft 32. There are three drive plates 39. A guide crossbar 28 is fixedly installed on the top of the testing platform 3. There are three guide crossbars 28. A clamping plate 29 is slidably connected to the surface of the guide crossbar 28. A push rod 40 is movably connected between the lower end of the clamping plate 29 and one end of the drive plate 39 via a bearing. A third servo electric cylinder 30 is movably connected to the right end of the top of the outer surface of the testing platform 3 via a bearing. The output end of the third servo electric cylinder 30 is hinged to one end of the fixed plate 31 via a pin. The third servo electric cylinder 30 is electrically connected to the PLC controller 11.

[0024] In this technical solution, the third servo electric cylinder 30 drives the fixed plate 31, the rotating shaft 32 and the drive plate 39 to rotate. The drive plate 39 drives the three sets of clamping plates 29 that slide along the guide crossbar 28 simultaneously via the push rod 40 to clamp the inner cavity of the bearing forging. This ensures that the bearing forging is fixed in the center at the top of the testing table 3, avoiding deviation of the forging during the testing process that would cause the probe 22 to deviate from its fit. At the same time, the synchronous movement of the three sets of clamping plates 29 ensures that the bearing forging is subjected to uniform force, preventing the detection position from shifting due to unstable fixing, and providing a stable foundation for the accurate signal acquisition of subsequent ultrasonic flaw detection.

[0025] Example 3: Based on Example 1, the present invention as follows Figures 1-7As shown, a rotating rod 35 is movably connected to the right end of the platform 1 via a bearing. A second gear 34 is fixedly installed on the top of the rotating rod 35, and the second gear 34 meshes with a gear ring 33. An air supply box 14 is fixedly installed on the right end of the bottom of the platform 1. There are two air supply boxes 14. On the side of the two air supply boxes 14 that are far apart from each other, an exhaust one-way valve 44 and an intake one-way valve 43 are fixedly installed from top to bottom. A guide pipe 15 is fixedly installed between the output ends of the two exhaust one-way valves 44. A flow guide shroud 23 is fixedly installed between the upper end of the guide pipe 15 and the left end of the front surface of the movable frame 21. A liquid guide pipe 24 is fixedly installed on the upper end of the guide pipe 15 and to the right of the flow guide shroud 23. The right end of the top of the platform 1 is located in front of the fixed frame 7. A container 8 is placed inside the container 8. The lower end of the liquid guide tube 24 is placed inside the container 8. An L-shaped rod 37 is fixedly connected to the bottom of the rotating rod 35. A piston 45 is slidably connected to the inner cavity of the gas delivery box 14. A fixing rod 42 is fixedly installed on the side of the two pistons 45 that are close to each other. An adjusting plate 36 is fixedly connected between the side of the two fixing rods 42 that are close to each other. A through groove 38 is opened in the middle of the adjusting plate 36. The lower end of the L-shaped rod 37 is slidably connected to the surface of the through groove 38. A rubber sealing ring 46 is fixedly installed in the middle of the piston 45. The surface of the rubber sealing ring 46 is slidably connected to the inner cavity of the gas delivery box 14. Guide frames 41 are slidably connected to both ends of the adjusting plate 36. The surface of the guide frame 41 is fixedly installed on the outer surface of the gas delivery box 14.

[0026] In this technical solution, the rotation of the gear ring 33 drives the second gear 34, the rotating rod 35, and the L-shaped rod 37 to rotate. The L-shaped rod 37 pushes the adjusting plate 36, the fixed rod 42, and the piston 45 to reciprocate within the air supply box 14 through the through groove 38. Combined with the intake one-way valve 43 and the exhaust one-way valve 44, air is extracted and compressed. When the compressed air flows through the air guide pipe 15, a low-pressure zone is formed above the liquid guide pipe 24 based on the Venturi effect, which draws in the water-based coupling agent in the container 8 and atomizes it. The agent is then precisely sprayed onto the surface of the bearing forging through the guide hood 23. This design does not require an additional power source for coupling agent spraying. The kinetic energy of the rotating test platform 3 enables automatic supply of coupling agent, which is energy-saving and environmentally friendly. At the same time, the atomized coupling agent can evenly cover the surface of the forging, eliminating the air gap between the probe 22 and the forging, avoiding the interference of air bubbles on the propagation of ultrasonic waves, and significantly improving the accuracy of crack detection.

[0027] Example 4: Based on Example 1, the present invention is as follows... Figures 1-4As shown, a support plate 6 is fixedly installed at the left end of the top of the platform 1 and to the left of the annular seat 2. The surface of the Hall sensor 5 is fixedly installed on the upper end of the support plate 6. A movable ball 27 is embedded in the top of the annular seat 2. The bottom of the detection platform 3 is slidably connected to the top of the movable ball 27. Guide vertical rods 18 are fixedly installed on both sides of the fixed frame 7. The surface of the movable frame 17 is slidably connected to the surface of the guide vertical rods 18. Limit rods 25 are fixedly installed at both ends of the right side of the movable frame 21. The surface of the limit rods 25 is slidably connected to the surface of the movable frame 17. A support frame 13 is fixedly installed around the bottom of the platform 1. A load-bearing base plate is fixedly connected around the bottom of the support frame 13. The ultrasonic flaw detector 10 is electrically connected to the probe 22. The PLC controller 11 is electrically connected to the drive motor 12, the Hall sensor 5, the first servo electric cylinder 16, and the second servo electric cylinder 19, respectively.

[0028] In this technical solution, the support plate 6 is used to support the Hall sensor 5, the movable ball bearing 27 is used to support and guide the bottom of the detection table 3, reducing the friction during the rotation of the detection table 3, the guide rod 18 and the limiting rod 25 are used to guide the moving frame 17 and the movable frame 21 respectively, preventing the moving frame 17 and the movable frame 21 from tilting or shifting during movement, and the support frame 13 and the load-bearing base plate are used to support the bottom of the table body 1.

[0029] Example 5: A method for identifying cracks in wind turbine main shaft bearing forgings, comprising the following steps: A. First, after the wind turbine main shaft bearing forging to be inspected is hoisted to the top of the inspection table 3, the third servo cylinder 30 is extended by the PLC controller 11, which can push the fixed plate 31, the rotating shaft 32 and the drive plate 39 to rotate. The rotation of the drive plate 39 can push the three sets of clamping plates 29 to move through the push rod 40 until the three sets of clamping plates 29 can clamp the inner cavity of the bearing forging synchronously. This avoids the bearing forging from shifting during subsequent inspection and ensures that the bearing forging can be placed in the center on the top of the inspection table 3, so as to facilitate the normal operation of subsequent flaw detection. B. Then, the second servo cylinder 19 is extended by the PLC controller 11, which pushes the pressure spring 20, the movable frame 21 and the probe 22 to move to the left, so that the probe 22 can fit against the upper surface of the bearing forging. The drive motor 12 is started by the PLC controller 11 to drive the first gear 26 to rotate. The rotation of the first gear 26 can drive the gear ring 33, the inspection table 3 and the bearing forging to rotate, so that the probe 22 can perform ultrasonic testing on different positions of the bearing forging in sequence, and the waveform is displayed by the ultrasonic flaw detector 10, so that personnel can judge whether there are cracks or defects inside the bearing forging. C. During the rotation of the inspection table 3, the magnetic block 4 can be driven to rotate, and the position of the magnetic block 4 can be monitored under the action of the Hall sensor 5, and feedback can be sent to the PLC controller 11. After the magnetic block 4, the inspection table 3 and the bearing forging rotate one revolution, the PLC controller 11 will control the first servo cylinder 16 to extend according to the preset height, and drive the moving frame 17, the second servo cylinder 19, the pressure spring 20, the movable frame 21 and the probe 22 to move, so as to carry out comprehensive flaw detection operations at different heights of the bearing forging. D. During the rotation of the gear ring 33, it can drive the second gear 34, the rotating rod 35, and the L-shaped rod 37 to rotate. During the rotation of the L-shaped rod 37, it can push the adjusting plate 36, the fixed rod 42, and the piston 45 to reciprocate through the through groove 38. Under the action of the reciprocating motion of the piston 45, the outside air can be drawn by the air supply box 14 and the intake one-way valve 43, and blown onto the surface of the bearing forging through the exhaust one-way valve 44, the air guide pipe 15, and the guide shroud 23. During the rapid flow of compressed air through the air guide tube 15, according to the Venturi effect, when the fluid is ejected at high speed, its static pressure drops sharply. At this time, a low-pressure area is formed above the liquid guide tube 24, allowing the aqueous coupling agent contained in the container 8 to be drawn into the air guide tube 15. After being mixed with the high-speed airflow and forming a mist, it is sprayed onto the surface of the bearing forging, thereby ensuring the fit between the probe 22 and the bearing forging during flaw detection and avoiding the impact of air bubbles on the flaw detection accuracy.

[0030] 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 the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A crack detection device for wind power main shaft bearing forgings, comprising a table body (1), characterized in that: The right end of the front surface of the table body (1) is fixedly installed with a bearing plate (9), the surface of the bearing plate (9) is sequentially fixedly installed with an ultrasonic flaw detector (10) and a PLC controller (11) from top to bottom, the left end of the bottom of the table body (1) is fixedly installed with a driving motor (12), the output end of the driving motor (12) is fixedly installed with a first gear (26), the left end of the top of the table body (1) is fixedly installed with an annular seat (2), the upper portion of the annular seat (2) is provided with a detection table (3), the lower end of the inner cavity of the detection table (3) is fixedly installed with a gear ring (33), the gear ring (33) is engaged with the first gear (26), the left side of the outer surface of the detection table (3) is fixedly installed with a magnetic block (4), the left side of the magnetic block (4) is provided with a Hall sensor (5), the right end of the top of the table body (1) is fixedly installed with a fixing frame (7), the top of the fixing frame (7) is fixedly installed with a first servo cylinder (16), the output end of the first servo cylinder (16) is fixedly installed with a moving frame (17), the surface of the moving frame (17) is fixedly installed with a second servo cylinder (19), the output end of the second servo cylinder (19) is fixedly installed with a pressure spring (20), the left side of the pressure spring (20) is fixedly installed with a movable frame (21), the left side of the movable frame (21) is fixedly installed with a probe (22).

2. The crack detection device for a wind power main shaft bearing forging according to claim 1, characterized in that: The middle end of the top of the detection table (3) is movably connected with a rotating shaft (32) through a bearing, the upper end of the rotating shaft (32) is fixedly connected with a fixed plate (31), the lower end of the rotating shaft (32) is fixedly connected with a driving plate (39), the number of the driving plates (39) is three, the top of the detection table (3) is fixedly installed with guide cross bars (28), the number of the guide cross bars (28) is three, the surface of the guide cross bars (28) is slidably connected with clamping plates (29), the lower end of the clamping plate (29) and one end of the driving plate (39) are movably connected through a bearing, the right end of the top of the outer surface of the detection table (3) is movably connected through a bearing, a third servo cylinder (30) is movably connected through a bearing, the output end of the third servo cylinder (30) is hingedly connected to one end of the fixed plate (31), and the third servo cylinder (30) is electrically connected with the PLC controller (11).

3. The crack detection device for a wind power main shaft bearing forging according to claim 1, characterized in that: The right end of the table body (1) is movably connected with a rotating rod (35) through a bearing, the top of the rotating rod (35) is fixedly installed with a second gear (34), the second gear (34) is engaged with a gear ring (33), the right end of the bottom of the table body (1) is fixedly installed with a gas conveying box (14), the number of the gas conveying box (14) is two, the upper ends of the two gas conveying boxes (14) are fixedly installed with an exhaust one-way valve (44) and an inlet one-way valve (43) from top to bottom, the output ends of the two exhaust one-way valves (44) are fixedly installed with a gas guide pipe (15), the upper end of the gas guide pipe (15) is fixedly installed with a flow guide cover (23) between the left end of the front surface of a movable frame (21), the upper end of the gas guide pipe (15) is fixedly installed with a liquid guide pipe (24) to the right of the flow guide cover (23), the right end of the top of the table body (1) is placed with a containing cylinder (8) in front of a fixed frame (7), and the lower end of the liquid guide pipe (24) is placed in the inner cavity of the containing cylinder (8).

4. The crack detection device for a wind power main shaft bearing forging according to claim 3, characterized in that: The bottom of the rotating rod (35) is fixedly connected with an L-shaped rod (37), the inner cavities of the gas conveying boxes (14) are slidably connected with pistons (45), the sides close to each other of the two pistons (45) are fixedly installed with fixed rods (42), the sides close to each other of the two fixed rods (42) are fixedly connected with an adjusting plate (36), the middle end of the adjusting plate (36) is provided with a through slot (38), and the lower end of the L-shaped rod (37) is slidably connected to the surface of the through slot (38).

5. The crack detection device for a wind power main shaft bearing forging according to claim 4, characterized in that: The middle end of the piston (45) is fixedly installed with a rubber sealing ring (46), the surface of the rubber sealing ring (46) is slidably connected to the inner cavity of the gas conveying box (14), and the two ends of the adjusting plate (36) are slidably connected with guide frames (41), the surface of the guide frame (41) is fixedly installed on the outer surface of the gas conveying box (14).

6. The crack detection device for a wind power main shaft bearing forging according to claim 1, characterized in that: The left end of the top of the table body (1) is fixedly installed with a supporting plate (6) to the left of the annular seat (2), the surface of the Hall sensor (5) is fixedly installed on the upper end of the supporting plate (6), the top of the annular seat (2) is embedded with a movable ball (27), and the bottom of the detection table (3) is slidably connected to the top of the movable ball (27).

7. The crack detection device for a wind power main shaft bearing forging according to claim 1, characterized in that: The two sides of the fixed frame (7) are fixedly installed with guide vertical rods (18), the surface of the moving frame (17) is slidably connected to the surface of the guide vertical rod (18), and the two ends of the right side of the movable frame (21) are fixedly installed with limit rods (25), the surface of the limit rod (25) is slidably connected to the surface of the moving frame (17).

8. The crack detection device for a wind power main shaft bearing forging according to claim 1, characterized in that: The periphery of the bottom of the table body (1) is fixedly installed with supporting frames (13), and the periphery of the bottom of the supporting frame (13) is fixedly connected with a load-bearing bottom plate.

9. The crack detection device for a wind power main shaft bearing forging according to claim 1, characterized in that: The ultrasonic flaw detector (10) is electrically connected with the probe (22), and the PLC controller (11) is electrically connected with the driving motor (12), the Hall sensor (5), the first servo cylinder (16) and the second servo cylinder (19) respectively.

10. A method for identifying a crack detection device for wind power main shaft bearing forgings, applied to the crack detection device for wind power main shaft bearing forgings according to any one of claims 1-9, characterized in that, The method comprises the following steps: A. First, the wind turbine main shaft bearing forgings to be detected are hung on the top of the detection table (3), and the third servo cylinder (30) is controlled to extend by the PLC controller (11) to push the fixed plate (31), the rotating shaft (32) and the driving plate (39) to rotate. The rotation of the driving plate (39) can move the three sets of clamping plates (29) through the push rod (40), until the three sets of clamping plates (29) can simultaneously clamp the inner cavity of the bearing forgings, so as to avoid the bearing forgings from shifting during subsequent detection, and ensure that the bearing forgings can be placed in the center of the detection table (3) on the top, so as to facilitate the normal operation of the subsequent detection work; B. Then, the second servo cylinder (19) is controlled to extend by the PLC controller (11) to push the pressure spring (20), the movable frame (21) and the probe (22) to move to the left side, so that the probe (22) can be in contact with the upper surface of the bearing forgings. The first gear (26) is driven to rotate by the PLC controller (11) starting the driving motor (12) to work, and the first gear (26) can drive the gear ring (33), the detection table (3) and the bearing forgings to rotate, so that the probe (22) can sequentially detect different positions of the bearing forgings by ultrasonic detection, and the waveform is displayed by the ultrasonic detector (10), so as to judge whether there are cracks and defects in the bearing forgings; C. And the magnetic block (4) can be rotated during the rotation of the detection table (3), and the position of the magnetic block (4) can be monitored under the action of the Hall sensor (5) and fed back to the PLC controller (11). When the magnetic block (4), the detection table (3) and the bearing forgings rotate one round, the first servo cylinder (16) will be controlled by the PLC controller (11) to extend according to the preset height, and the moving frame (17), the second servo cylinder (19), the pressure spring (20), the movable frame (21) and the probe (22) are driven to move, so as to comprehensively detect the different height positions of the bearing forgings. D. And during the rotation of the gear ring (33), the second gear (34), the rotating rod (35) and the L-shaped rod (37) can be rotated, and in the process of rotating the L-shaped rod (37), the adjusting plate (36), the fixed rod (42) and the piston (45) can be pushed to reciprocate through the through slot (38), under the action of the reciprocating movement of the piston (45), the air outside can be extracted by the gas delivery tank (14) and the air inlet check valve (43), and is blown to the surface of the bearing forging through the air outlet check valve (44), The air guide pipe (15) and the flow guide cover (23), and during the rapid flow of the compressed air flow in the air guide pipe (15), according to the Venturi effect, when the fluid is sprayed at high speed, its static pressure will drop sharply, at this time a low pressure area will be formed above the liquid guide pipe (24), so that the water-based coupling agent contained in the containing cylinder (8) can be sucked into the air guide pipe (15), and after being mixed by high-speed airflow to form mist, it is sprayed on the surface of the bearing forging, so as to ensure the effect of adhesion between the probe (22) and the bearing forging during the detection, avoid the influence of the existence of air bubbles on the detection precision.

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