Automatic flaw detection device for planet carrier inner hole of wind power gear box

Abstract

The invention provides an automatic flaw detection device for an inner hole of a planet carrier of a wind power gear box, and relates to the technical field of planet carrier detection, the automatic flaw detection device comprises a fixing frame body, and fixing supports are installed at the tops of the two sides of the fixing frame body; a connecting plate is mounted on the inner side of the top of the fixed bracket; a concentration plate is mounted in the middle of the connecting plate; a rotating pipe is rotationally mounted in the middle of the concentration plate; a quick connector is installed at the top end of the rotating pipe, a gear is installed on the outer side of the top of the rotating pipe, and a rotating nozzle is installed at the bottom of the rotating pipe. The rotary nozzle is firstly inserted into the inner hole of the planet carrier of the wind power gear box, rotates in the inner hole of the planet carrier of the wind power gear box and sprays air flow, so that chippings and impurities in the inner hole are effectively blown and cleaned, the interference of the impurities on the detection result is reduced, the accuracy of the flaw detection result is improved, and the problem that the metal chippings and impurities are accumulated on the surface of the inner hole and are damaged is solved. And adverse effects are generated on the accuracy of flaw detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of planetary frame detection, and in particular to an automatic flaw detection device for inner holes of a planetary frame of a wind power gear box. Background Art

[0002] The planetary carrier of a wind turbine gearbox is one of the core components of the gearbox in a wind turbine generator set. As the key supporting structure of the planetary gear transmission system, the inner hole of the planetary carrier of a wind turbine gearbox is the key part for installing the planetary gear bearings. Its dimensional accuracy and form and position tolerances directly affect the meshing quality between the planetary gear and the sun gear and the inner gear ring. Therefore, it is necessary to use a flaw detection device to perform flaw detection on the inner hole to maintain the reliability of the gearbox, transmission efficiency and stability of the entire machine operation.

[0003] In the existing technology, when performing flaw detection on the inner hole of the planetary carrier of the wind turbine gearbox, the surface of the inner hole of the wind turbine gearbox planetary carrier needs to undergo precision processing processes such as grinding and finishing. However, metal debris and impurities generated by these processes accumulate on the surface of the inner hole. The flaw detection device is directly inserted into the inner hole for scanning. At this time, the impurities attached to the surface will form an irrelevant signal interference source, which will adversely affect the accuracy of the flaw detection results. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic flaw detection device for the inner hole of a planetary carrier of a wind turbine gearbox to solve the problems mentioned in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is an automatic flaw detection device for the inner hole of a planetary frame of a wind power gearbox, which specifically comprises: a fixed frame body, the fixed frame body is a frame structure, and a transmission assembly is installed on the top of the fixed frame body; guide vertical rods are installed on both sides of the fixed frame body, wherein the guide vertical rods are cylindrical structures; drive cylinders are installed on both sides of the transmission assembly, and a traction plate is installed on the output end of the drive cylinder; the traction plate is located on the inner side of the fixed frame body, and a movable support plate is connected to the side of the traction plate; positioning plates are installed at both ends of the movable support plate; a collection box is installed at the bottom of the fixed frame body; a drive pump is installed on the top of the collection box, and a drive pump is installed on the input end of the drive pump It is equipped with a mainstream pipe; the top of the mainstream pipe is connected to a diversion pipe; a collecting hood is installed on the inner side of the positioning plate; the outer side of the collecting hood is a conical structure, and one side of the outer end of the collecting hood is connected to the side end of the diversion pipe; fixed brackets are installed on the top of both sides of the fixed frame; a connecting plate is installed on the inner side of the top of the fixed bracket; a concentrating plate is installed in the middle position of the connecting plate; a rotating tube is rotatably installed in the middle position of the concentrating plate; a quick connector is installed on the top of the rotating tube, a gear is installed on the outer side of the top of the rotating tube, and a rotating nozzle is installed on the bottom of the rotating tube, wherein a plurality of evenly distributed jet holes are provided on the outer side of the rotating nozzle.

[0006] Furthermore, the positioning plate is a U-shaped structure, and a guide slide is installed on the top of the positioning plate; limiting sliders are installed on both sides of the guide slide; and the limiting sliders are slidably installed on the outside of the guide vertical rod.

[0007] Furthermore, positioning horizontal rods are slidably installed inside the two ends of the guide slide, and a driving cylinder is installed in the middle position of the outer side of the guide slide, and the output end of the driving cylinder passes through the inner side of the guide slide and is installed with a fixed splint; the fixed splint is an arc-shaped plate structure, and the outer ends of the fixed splint are connected to the inner end of the positioning horizontal rod.

[0008] Furthermore, a servo motor is installed on one side of the top of the concentrating plate, and a gear is installed on the output end of the servo motor, and the gear is meshed with the gear on the outer side of the top of the rotating tube.

[0009] Furthermore, an air pump is installed on the top of the connecting plate, and a guide tube is installed on the output end of the air pump; the side end of the guide tube is rotatably connected to the quick connector at the top end of the rotating tube.

[0010] Furthermore, a fixed carrier plate is installed on the outer side of the rotating tube; and the top of the fixed carrier plate is provided with four evenly distributed guide grooves.

[0011] Furthermore, a spring is installed inside the guide groove, and a guide rod is installed inside the guide groove through the spring; a guide block is installed on the top of the guide rod; and the guide block is located on the top of the fixed carrier plate.

[0012] Furthermore, a limit plate is installed on the outer side of the guide rod; the limit plate is slidably installed on the bottom of the fixed carrier; a detection carrier is installed on the bottom of the guide rod, wherein a ray probe is installed on the inner side of the detection carrier.

[0013] Furthermore, an adjusting ring sleeve is rotatably installed on the outer side of the rotating tube; the adjusting ring sleeve is installed on the top of the fixed carrier plate, and a fixing bolt is installed on the outer side of the adjusting ring sleeve, and the inner end of the fixing bolt is rotatably installed on the outer side of the rotating tube.

[0014] Furthermore, four shifting plates are installed on the outer side of the adjusting ring sleeve; the shifting plates are arc-shaped plate structures, and the shifting plates are slidably installed on the outer side of the guide block.

[0015] The present invention provides an automatic flaw detection device for the inner hole of a planetary carrier of a wind turbine gearbox, which has the following beneficial effects: When the present invention is in use, the airflow generated by the air pump on the top of the connecting plate enters the rotating nozzle through the guide pipe, and at the same time the servo motor on the top of the centralizing plate drives the rotating tube to rotate, and the two fixed clamps drive the clamped wind turbine gear box planetary frame to move upward, so that the rotating nozzle is first inserted into the inner hole of the wind turbine gear box planetary frame. The rotating nozzle rotates in the inner hole of the wind turbine gear box planetary frame and sprays airflow, effectively blowing away debris and impurities in the inner hole, cleaning the inner hole before flaw detection, greatly reducing the interference of impurities on the detection results, and improving the accuracy of the flaw detection results.

[0016] In addition, the distances between multiple guide rods are adjusted according to the diameter of the inner hole of the wind turbine gearbox planetary carrier. The guide rods drive the bottom detection carrier to the appropriate position, achieving precise adaptation of the spacing between the four detection carriers. The detection carrier then enters the inner hole of the wind turbine gearbox planetary carrier. The four detection carriers rotate to detect the inner hole surface and the top edge position, which can effectively cover all parts of the inner hole, eliminate the blind spots that may exist in traditional detection methods, ensure a comprehensive evaluation of the inner hole quality, and provide a strong guarantee for the safe operation of the wind turbine gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0018] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached figure: Figure 1 A schematic diagram showing the overall structure of the present invention; Figure 2 It shows a schematic diagram of the three-dimensional structure of the movable support plate of the present invention; Figure 3 A schematic diagram of the three-dimensional structure of the guide slide of the present invention is shown; Figure 4 A schematic diagram of the three-dimensional structure of the shunt pipe of the present invention is shown; Figure 5 It shows a schematic cross-sectional structure diagram of the concentrating plate of the present invention; Figure 6 A schematic cross-sectional view of the collecting cover of the present invention is shown; Figure 7 A schematic diagram of the three-dimensional structure of the bottom of the fixed carrier plate of the present invention is shown; Figure 8 A schematic diagram of the three-dimensional structure of the dial plate of the present invention is shown; Figure 9 A schematic diagram of the three-dimensional structure of the guide rod of the present invention is shown.

[0020] Reference Signs List 1. Fixed frame; 101. Guide vertical rod; 102. Pull plate; 103. Movable support plate; 104. Positioning plate; 105. Guide slide; 106. Limiting slide; 107. Positioning horizontal rod; 108. Fixed splint; 2. Collection box; 201. Main flow pipe; 202. Diverter pipe; 203. Collection cover; 204. Fixed bracket; 205. Connecting plate; 206. Concentrator plate; 207. Rotating pipe; 208. Rotating nozzle; 209. Diversion pipe; 3. Fixed carrier plate; 301. Guide groove; 302. Guide rod; 303. Guide block; 304. Limit plate; 305. Detection carrier plate; 306. Adjustment ring; 307. Dial plate; 4. Transmission components. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Please refer to Figures 1 to 9 : Embodiment 1: The present invention proposes an automatic flaw detection device for the inner hole of a planetary frame of a wind turbine gearbox, comprising: a fixed frame 1, the fixed frame 1 being a frame structure, and a transmission assembly 4 being installed on the top of the fixed frame 1; guide vertical rods 101 being installed on both sides of the fixed frame 1, wherein the guide vertical rods 101 are cylindrical structures; drive cylinders are installed on both sides of the transmission assembly 4, and a traction plate 102 is installed on the output end of the drive cylinder; the traction plate 102 is located on the inner side of the fixed frame 1, and a movable support plate 103 is connected to the side of the traction plate 102; positioning plates 104 are installed at both ends of the movable support plate 103; the fixed frame 102 is provided with a plurality of guide vertical rods 101 on the top and bottom of the fixed frame 101; the guide vertical rods 101 are ... The positioning plate 104 is a U-shaped structure, and a guide slide 105 is installed on the top of the positioning plate 104; limiting slide blocks 106 are installed on both sides of the guide slide 105; the limiting slide block 106 is slidably installed on the outside of the guide vertical rod 101; positioning horizontal rods 107 are slidably installed inside the two ends of the guide slide 105, and a driving cylinder is installed in the middle position of the outside of the guide slide 105, and the output end of the driving cylinder passes through the inside of the guide slide 105 and a fixed splint 108 is installed; the fixed splint 108 is an arc-shaped plate structure, and the outer ends of the fixed splint 108 are connected to the inner end of the positioning horizontal rod 107.

[0023] In the embodiment of the present invention, when the inner hole of the wind turbine gearbox planetary frame is inspected, the processed wind turbine gearbox planetary frame is placed on the transmission component 4 on the top of the fixed frame body 1. The transmission component 4 moves intermittently and drives the wind turbine gearbox planetary frame to move between the two fixed clamping plates 108. The driving cylinder at the middle position of the outer side of the guide slide 105 drives the fixed clamping plate 108 to move. The outer sides of the two ends of the fixed clamping plate 108 drive the positioning horizontal rod 107 to penetrate the guide slide 105 to move, so that the two fixed clamping plates 108 move horizontally and are clamped on the wind turbine gearbox planetary frame. On the outside of the star frame, the driving cylinders on both sides of the transmission component 4 drive the traction plate 102 below to move upward, and the two ends of the traction plate 102 drive the movable support plate 103 to move upward. The top of the movable support plate 103 drives the positioning plate 104 to move on both sides of the transmission component 4. The top of the positioning plate 104 drives the limiting sliders 106 on both sides of the guide slide 105 to move upward along the guide vertical rod 101, and then the two fixed splints 108 drive the wind turbine gear box planetary frame to move upward to a suitable height, which is convenient for insertion into the inner hole of the wind turbine gear box planetary frame for flaw detection.

[0024] Embodiment 2, on the basis of embodiment 1, a collecting box 2 is installed at the bottom of the fixed frame 1; a driving pump is installed on the top of the collecting box 2, and a main flow pipe 201 is installed on the input end of the driving pump; the top of the main flow pipe 201 is connected to the diversion pipe 202; a collecting cover 203 is installed on the inner side of the positioning plate 104; the outer side of the collecting cover 203 is a conical structure, and one side of the outer end of the collecting cover 203 is connected to the side end of the diversion pipe 202; fixed brackets 204 are installed on the top of both sides of the fixed frame 1; a connecting plate 205 is installed on the inner side of the top of the fixed bracket 204; a concentrating plate 206 is installed in the middle position of the connecting plate 205; a concentrating plate 206 is rotatably installed in the middle position of the concentrating plate 206 Rotating tube 207; a quick connector is installed at the top of the rotating tube 207, a gear is installed on the outside of the top of the rotating tube 207, and a rotating nozzle 208 is installed at the bottom of the rotating tube 207, wherein a plurality of evenly distributed air injection holes are provided on the outside of the rotating nozzle 208; a servo motor is installed on one side of the top of the concentrating plate 206, and a gear is installed on the output end of the servo motor, and the gear is meshed with the gear on the outside of the top of the rotating tube 207; an air pump is installed on the top of the connecting plate 205, and a guide tube 209 is installed on the output end of the air pump; the side end of the guide tube 209 is rotatably connected to the quick connector at the top of the rotating tube 207, and when performing flaw detection on the inner hole of the planetary frame of the wind turbine gearbox, the fixed The central plate 206 in the middle of the connecting plate 205 on the inner side of the top of the bracket 204 positions the position of the rotating tube 207 so that the rotating nozzle 208 at the bottom of the rotating tube 207 is at a suitable height. The airflow generated by the air pump on the top of the connecting plate 205 enters the rotating tube 207 through the guide tube 209 and then enters the interior of the rotating nozzle 208. At the same time, the servo motor output end gear on the top of the central plate 206 drives the rotating tube 207 to rotate. The two fixed splints 108 support the planetary frame of the wind turbine gear box to move upward, so that the rotating nozzle 208 is first inserted into the inner hole of the planetary frame of the wind turbine gear box, and the rotating tube 207 drives the rotating nozzle 208 to rotate in the inner hole of the planetary frame of the wind turbine gear box. The rotating nozzle 208 rotates in the middle, and the air flow ejected from the air jet hole on the outside of the rotating nozzle 208 blows and cleans the debris and impurities in the inner hole. The inner hole is blown and cleaned before the flaw detection, which reduces the influence of impurities on the flaw detection results and improves the accuracy of the flaw detection results. While the rotating nozzle 208 is blowing and cleaning, the positioning plate 104 drives the collection cover 203 to a certain height, and the driving pump on the top of the collection box 2 works. The collection cover 203 absorbs the airflow on the transmission component 4, and the airflow carries impurities through the collection cover 203 into the diversion pipe 202 and then through the main pipe 201 into the collection box 2 for storage, to ensure that the debris and impurities are blown to other places by the airflow.

[0025] Example 3, based on Example 1, a fixed carrier plate 3 is installed on the outside of the rotating tube 207; four evenly distributed guide grooves 301 are opened on the top of the fixed carrier plate 3; a spring is installed inside the guide groove 301, and a guide rod 302 is installed inside the guide groove 301 through the spring; a guide block 303 is installed on the top of the guide rod 302; the guide block 303 is at the top of the fixed carrier plate 3; a limit plate 304 is installed on the outside of the guide rod 302; the limit plate 304 is slidably installed on the bottom of the fixed carrier plate 3; a detection The carrier plate 305 is equipped with a ray probe on the inner side of the detection carrier plate 305; the outer side of the rotating tube 207 is rotatably equipped with an adjusting ring sleeve 306; the adjusting ring sleeve 306 is installed on the top of the fixed carrier plate 3, and the outer side of the adjusting ring sleeve 306 is equipped with a fixing bolt, and the inner end of the fixing bolt is rotatably installed on the outer side of the rotating tube 207; four dial plates 307 are installed on the outer side of the adjusting ring sleeve 306; the dial plate 307 is an arc-shaped plate structure, and the dial plate 307 is slidably installed on the outer side of the guide block 303. When the inner hole of the wind turbine gearbox planetary frame is inspected for flaws, according to The diameter of the inner hole of the planetary frame of the wind turbine gearbox adjusts the distance between multiple guide rods 302. The adjusting ring sleeve 306 on the fixed carrier plate 3 and the outer side of the rotating tube 207 drives the four dial plates 307 to rotate simultaneously. The outer side of the dial plate 307 drives the guide block 303 to drive the guide rod 302 to move along the guide groove 301. The limit plate 304 limits the position of the guide rod 302 to ensure the horizontal movement of the guide rod 302. The spring on the side of the guide rod 302 is stretched so that the guide rod 302 drives the bottom detection carrier plate 305 to be in a suitable position. The detection carrier plates 305 at four locations are detected. The plates 305 are at a suitable spacing, and the position of the adjusting ring sleeve 306 is fixed by the fixing bolts on the outside of the adjusting ring sleeve 306 to ensure the stability of the position of the detection carrier plate 305. After the inner hole of the wind turbine gear box planetary frame moves upward, the rotating nozzle 208 is first cleaned and then continues to move upward, so that the detection carrier plate 305 is in the inner hole, and the rotating tube 207 drives the fixed carrier plate 3 to rotate, and the fixed carrier plate 3 drives the four detection carrier plates 305 to rotate and detect the inner hole surface and the top edge position, thereby ensuring the comprehensiveness of the inner hole detection of the wind turbine gear box planetary frame.

[0026] The working principle of this embodiment is as follows: the distance between multiple guide rods 302 is adjusted according to the diameter of the inner hole of the wind turbine gearbox planetary frame, and the adjusting ring sleeve 306 is rotated to drive the four dial plates 307 to push the guide block 303 to drive the guide rod 302 to move along the guide groove 301. The guide rod 302 drives the four detection carrier plates 305 at the bottom to be at an appropriate spacing, and the position of the adjusting ring sleeve 306 is fixed by the fixing bolts. After the transmission component 4 moves intermittently, it drives the wind turbine gearbox planetary frame to move between the two fixed splints 108. The driving cylinder in the middle position of the outer side of the guide slide 105 drives the fixed splint 108 to move horizontally and clamped on the outer side of the wind turbine gearbox planetary frame. The driving cylinders on both sides of the transmission component 4 drive the traction plate 102 below to move upward and then drive the movable support plate 103 to move upward. The top of the movable support plate 103 drives the positioning plate 104 to move on both sides of the transmission component 4. The top of the positioning plate 104 drives the limiting sliders 106 on both sides of the guide slide 105 to move upward along the guide vertical rod 101, and the two fixed splints 108 drive the wind turbine gear The planetary frame of the wind turbine gear box moves upward to a suitable height, and the centralizing plate 206 positions the rotating tube 207. The airflow generated by the air pump enters the rotating tube 207 through the guide tube 209 and then enters the rotating nozzle 208. At the same time, the servo motor on the top of the centralizing plate 206 drives the rotating tube 207 to rotate. After the two fixed splints 108 support the wind turbine gear box planetary frame to move upward, the rotating nozzle 208 is first inserted into the inner hole of the wind turbine gear box planetary frame, and the rotating tube 207 drives the rotating nozzle 208 to rotate in the inner hole of the wind turbine gear box planetary frame. During the rotation, the airflow ejected from the jet holes on the outside of the rotating nozzle 208 blows and cleans the debris and impurities in the inner hole, the driving pump on the top of the collecting box 2 works, and the collecting cover 203 absorbs the airflow carrying impurities through the diversion pipe 202 and then through the main pipe 201 into the collecting box 2 for storage. After the planetary frame of the wind turbine gearbox continues to move upward, the detection carrier plate 305 is in the inner hole, the rotating tube 207 drives the fixed carrier plate 3 to rotate, and the fixed carrier plate 3 drives the four detection carrier plates 305 to perform comprehensive flaw detection on the surface of the inner hole and the top edge position.

[0027] In this article, there are several points to note: 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0028] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0029] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. Automatic flaw detection device for the inner hole of the planetary carrier of the wind turbine gearbox, including: A fixed frame (1), wherein a transmission assembly (4) is installed on the top of the fixed frame (1); the fixed frame (1) is characterized in that guide vertical rods (101) are installed on both sides of the fixed frame (1); a driving cylinder is installed on both sides of the transmission assembly (4), and a traction plate (102) is installed on the output end of the driving cylinder; the traction plate (102) is located on the inner side of the fixed frame (1), and a movable support plate (103) is connected to the side of the traction plate (102); positioning plates (104) are installed at both ends of the movable support plate (103); a collecting box (2) is installed at the bottom of the fixed frame (1); a driving pump is installed on the top of the collecting box (2), and a main flow pipe (201) is installed on the input end of the driving pump; the top of the main flow pipe (201) is connected to a diversion pipe (202 A collecting hood (203) is installed on the inner side of the positioning plate (104); one side of the outer end of the collecting hood (203) is connected to the side end of the diversion pipe (202); fixed brackets (204) are installed on the top of both sides of the fixed frame (1); a connecting plate (205) is installed on the inner side of the top of the fixed bracket (204); a concentrating plate (206) is installed in the middle position of the connecting plate (205); a rotating tube (207) is rotatably installed in the middle position of the concentrating plate (206); a quick connector is installed on the top of the rotating tube (207), a gear is installed on the outer side of the top of the rotating tube (207), and a rotating nozzle (208) is installed on the bottom of the rotating tube (207), wherein a plurality of evenly distributed air injection holes are provided on the outer side of the rotating nozzle (208).

2. The wind turbine gearbox planetary carrier inner hole automatic flaw detection device according to claim 1 is characterized in that: A guide slide (105) is installed on the top of the positioning plate (104); limiting slide blocks (106) are installed on both sides of the guide slide (105); and the limiting slide blocks (106) are slidably installed on the outside of the guide vertical rod (101).

3. The automatic flaw detection device for the inner hole of the planetary carrier of a wind turbine gearbox according to claim 2 is characterized in that: Positioning horizontal rods (107) are slidably installed inside the two ends of the guide slide (105), and a driving cylinder is installed at the middle position of the outer side of the guide slide (105). The output end of the driving cylinder passes through the inner side of the guide slide (105) and a fixed splint (108) is installed; the outer ends of the fixed splint (108) are connected to the inner end of the positioning horizontal rod (107).

4. The automatic flaw detection device for the inner hole of the planetary carrier of a wind turbine gearbox according to claim 3 is characterized in that: A servo motor is installed on one side of the top of the concentrating plate (206), and a gear is installed on the output end of the servo motor. The gear meshes with the gear on the outer side of the top of the rotating tube (207).

5. The wind turbine gearbox planetary carrier inner hole automatic flaw detection device according to claim 4 is characterized in that: An air pump is installed on the top of the connecting plate (205), and a flow guide tube (209) is installed on the output end of the air pump; the side end of the flow guide tube (209) is rotatably connected to the quick connector at the top end of the rotating tube (207).

6. The wind turbine gearbox planetary carrier inner hole automatic flaw detection device according to claim 5, characterized in that: A fixed carrier plate (3) is installed on the outer side of the rotating tube (207); and four evenly distributed guide grooves (301) are formed on the top of the fixed carrier plate (3).

7. The wind turbine gearbox planetary carrier inner hole automatic flaw detection device according to claim 6, characterized in that: A spring is installed inside the guide groove (301), and a guide rod (302) is installed inside the guide groove (301) via the spring; a guide block (303) is installed on the top of the guide rod (302); and the guide block (303) is located on the top of the fixed carrier plate (3).

8. The automatic flaw detection device for the inner hole of the planetary carrier of a wind turbine gearbox according to claim 7, characterized in that: A limit plate (304) is installed on the outer side of the guide rod (302); the limit plate (304) is slidably installed on the bottom of the fixed carrier (3); a detection carrier (305) is installed on the bottom of the guide rod (302), wherein a ray probe is installed on the inner side of the detection carrier (305).

9. The wind turbine gearbox planetary carrier inner hole automatic flaw detection device according to claim 8, characterized in that: An adjusting ring sleeve (306) is rotatably mounted on the outer side of the rotating tube (207); the adjusting ring sleeve (306) is mounted on the top of the fixed carrier plate (3), and a fixing bolt is mounted on the outer side of the adjusting ring sleeve (306), and the inner end of the fixing bolt is rotatably mounted on the outer side of the rotating tube (207).

10. The wind turbine gearbox planetary carrier inner hole automatic flaw detection device according to claim 9, characterized in that: Four shifting plates (307) are installed on the outside of the adjusting ring sleeve (306); the shifting plates (307) are slidably installed on the outside of the guide block (303).

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