Rotary scanning support for eddy current testing of microcracks on impeller surfaces

Abstract

The utility model provides a vane surface microcrack eddy current detection rotation scanning support relates to vane detection technical field, including the chassis still includes synchronous drive lifting assembly, synchronous drive lifting assembly includes fixed connection on the chassis's speed reducer, the top of chassis is installed with first universal coupling both ends in the side near the speed reducer, the top of chassis is installed with second universal coupling in four corners, the inside of second universal coupling is provided with the lead screw, the outside screw thread connection of lead screw has the lifting column, the outside fixed connection of four lifting columns has the moving disc, the automatic lifting and rotation of vane body are realized like this, guarantee inductive coil and vane surface close adhesion simultaneously, effectively solved the manual regulation vane height and handheld probe scanning mode of artificial, avoided the problem that the detection probe and vane surface interval is not uniform and leads to the unstable problem of detection signal, improved the accuracy of detection result.

Description

Technical Field

[0001] This utility model relates to the field of impeller detection technology, and in particular to a rotary scanning bracket for detecting microcracks on the impeller surface using eddy current. Background Technology

[0002] In many industrial sectors, such as aerospace, energy and power, and automobile manufacturing, the impeller is a key rotating component, and its operating condition is directly related to the safety of the equipment. In harsh working environments, microcracks are prone to appear on the impeller surface. If these microcracks are not detected and dealt with in time, they may expand and eventually lead to impeller breakage, causing serious accidents.

[0003] Currently, the detection of microcracks on impeller surfaces typically involves placing the impeller on a simple rotating device and manually adjusting its height to bring the eddy current probe as close to the impeller surface as possible. During testing, the operator starts the rotating device to make the impeller rotate while simultaneously holding the eddy current probe and slowly moving it along the impeller surface to scan, observing changes in the data displayed on the instrument to determine the presence of microcracks. However, in practical use, due to the manual adjustment of the impeller height and the handheld scanning method, it is difficult to ensure that the probe maintains a consistently uniform distance from the impeller surface, leading to unstable detection signals and affecting the accuracy of the test results.

[0004] Therefore, this utility model provides a rotary scanning bracket for eddy current detection of microcracks on the impeller surface. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a rotary scanning bracket for detecting microcracks on the impeller surface using eddy current.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotary scanning bracket for detecting microcracks on the impeller surface using eddy currents, comprising a chassis and a synchronous drive lifting assembly. The synchronous drive lifting assembly includes a reducer fixedly connected to the chassis. A first universal coupling is installed at both ends of the top of the chassis near the reducer. A second universal coupling is installed at each of the four corners of the top of the chassis. A lead screw is provided inside the second universal coupling. A lifting column is threaded to the outside of the lead screw. A movable disk is fixedly connected to the outside of the four lifting columns.

[0007] A sensing component is fixedly connected to the top of the synchronous drive lifting assembly.

[0008] In a preferred embodiment, the sensing component includes a fixed plate fixedly connected to a movable disk, a column fixedly connected to the top of the fixed plate, a flat washer fixedly connected to the top of the column, bolts fixedly connected to the four inner corners of the flat washer, and an induction coil tightening device fixedly connected to the top of the flat washer.

[0009] In a preferred embodiment, a guide post is fixedly connected to the top of the chassis, and an impeller body is sleeved on the outer side of the guide post.

[0010] In a preferred embodiment, a motor is fixedly connected to one end of the reducer, and a base is fixedly connected to the outside of the motor.

[0011] In a preferred embodiment, support legs are fixedly connected to the four corners of the bottom of the chassis.

[0012] In a preferred embodiment, one end of each of the two second universal joints is connected to one of the first universal joints, and one end of each of the other two second universal joints is connected to the other first universal joint.

[0013] In a preferred embodiment, the bottom end of the impeller body is in contact with the top end of the lifting column.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] This invention uses a motor to drive a reducer, which reduces the speed and increases the torque of high-speed rotation, causing the first universal coupling to rotate, which in turn drives the lead screw to rotate. The lead screw engages with the lifting column, converting the rotational motion into linear motion, which in turn moves the lifting column up and down. The lifting column then moves the moving disc up and down, adjusting the height of the impeller body. When the impeller body rotates, the induction coil is tightly attached to the impeller surface under the action of the induction coil clamping device. This achieves automatic lifting and rotation of the impeller body while ensuring that the induction coil is tightly attached to the impeller surface. This effectively solves the problems of manual adjustment of the impeller height and handheld probe scanning, avoiding the problem of unstable detection signals caused by uneven distance between the detection probe and the impeller surface, and improving the accuracy of the detection results. Attached Figure Description

[0016] Figure 1 A three-dimensional view of the rotary scanning bracket for eddy current detection of microcracks on the impeller surface provided by this utility model;

[0017] Figure 2 A schematic diagram of the reducer structure of the rotary scanning bracket for eddy current detection of microcracks on the impeller surface provided by this utility model;

[0018] Figure 3A schematic diagram of the synchronous drive lifting assembly of the rotary scanning bracket for eddy current detection of microcracks on the impeller surface provided by this utility model;

[0019] Figure 4 A schematic diagram of the moving disk structure of the rotary scanning bracket for eddy current detection of microcracks on the impeller surface provided by this utility model;

[0020] Figure 5 A schematic diagram of the sensing component structure of the rotary scanning bracket for eddy current detection of microcracks on the impeller surface provided by this utility model.

[0021] Legend:

[0022] 1. Chassis;

[0023] 2. Synchronous drive lifting assembly; 21. Reducer; 22. First universal coupling; 23. Second universal coupling; 24. Lead screw; 25. Lifting column; 26. Moving plate; 27. Guide column; 28. Motor; 29. ​​Base; 210. Support leg;

[0024] 3. Induction assembly; 31. Fixing plate; 32. Column; 33. Flat washer; 34. Bolt; 35. Induction coil tightening device;

[0025] 4. Impeller body. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1 - Figure 4As shown, this embodiment provides a technical solution: a rotary scanning bracket for eddy current detection of microcracks on impeller surfaces, including a chassis 1 and a synchronous drive lifting assembly 2. The synchronous drive lifting assembly 2 includes a reducer 21 fixedly connected to the chassis 1. Two first universal couplings 22 are installed at both ends of the top of the chassis 1 near the reducer 21. Two second universal couplings 23 are installed at the four corners of the top of the chassis 1. One end of two second universal couplings 23 is connected to one of the first universal couplings 22, and one end of the other two second universal couplings 23 is connected to the other first universal coupling 22. A lead screw 24 is provided inside the second universal coupling 23. A lifting column 25 is threadedly connected to the outside of the lead screw 24. A movable disk 26 is fixedly connected to the outside of the four lifting columns 25. A guide column 27 is fixedly connected to the top of the chassis 1. An impeller body 4 is sleeved on the outside of the guide column 27. The bottom end of the impeller body 4 contacts the top end of the lifting column 25. A motor 28 is fixedly connected to one end of the reducer 21, and a base 29 is fixedly connected to the outside of the motor 28. Support legs 210 are fixedly connected to the four corners of the bottom of the chassis 1.

[0028] The chassis 1 serves as the basic support component for the rotary scanning bracket for microcrack eddy current detection of the entire impeller surface. The reducer 21 works in conjunction with the motor 28 to reduce the motor's speed while increasing torque. The high-speed rotation output from the motor 28, after passing through the reducer 21, can be converted into low-speed, high-torque power suitable for driving the impeller body. The first universal coupling 22 is mainly used to connect the reducer 21 and the lead screw 24 for power transmission. It can compensate for possible angular deviations between the output shaft of the reducer 21 and the input shaft of the lead screw 24 due to installation or other reasons, ensuring smooth and stable power transmission. The second universal coupling 23 connects the lead screw 24 and the entire... The lifting system, while allowing for some angular variation in the lead screw 24 within space to accommodate the layout and installation position of various components on the chassis 1, transmits power from the first universal coupling 22 to the lead screw 24, thereby driving the lifting column 25. The lead screw 24, through a threaded connection with the lifting column 25, converts rotational motion into linear motion. When the lead screw 24 rotates, the lifting column 25 moves along the axis of the lead screw 24, thus driving the moving plate 26 to rise and fall. The lifting columns 25, in cooperation with the lead screw 24, achieve their own vertical movement. The four lifting columns 25 are evenly distributed, jointly supporting the moving plate 26 and enabling synchronous lifting and lowering, ensuring... The movable disk 26 remains horizontal during lifting and lowering. Serving as a direct support platform for the impeller body, the movable disk 26 is fixedly connected to four lifting columns 25. Its height is adjusted by the lifting of the columns 25. The upper part of the disk is used to place the impeller body. Guide columns 27 guide the impeller body; when placed on the movable disk 26, the guide columns 27 guide the impeller body's installation position and provide stability during rotation. The impeller body 4, the component to be tested, is mounted on the movable disk 26 and positioned by the guide columns 27. Driven by the motor 28, the impeller body rotates. The lifting column 25 can be adjusted in height so that the impeller body can be subjected to eddy current detection in a suitable position and posture. The motor 28 serves as a power source to provide rotational power for the entire device. The output shaft of the motor 28 is connected to the reducer 21. After the speed is reduced and the torque is increased by the reducer 21, the impeller body is driven to rotate. The base 29 is used to fix the motor 28 and stably install the motor 28 on the chassis 1 to ensure that the motor 28 will not be displaced or shaken during operation. The support legs 210 serve as the support structure at the bottom of the entire device, placing the entire bracket stably on the ground. They are distributed at the four corners of the chassis 1 to distribute the weight of the entire device.

[0029] like Figure 1 , Figure 3 and Figure 5As shown, a sensing component 3 is fixedly connected to the top of the synchronous drive lifting component 2. The sensing component 3 includes a fixed plate 31 fixedly connected to the movable plate 26. A column 32 is fixedly connected to the top of the fixed plate 31. A flat washer 33 is fixedly connected to the top of the column 32. Bolts 34 are fixedly connected to the four corners inside the flat washer 33. An induction coil tightening device 35 is fixedly connected to the top of the flat washer 33.

[0030] The fixed plate 31 is fixedly connected to the movable plate 26, serving as a connection and support, providing a stable foundation for the installation of the sensing component 3. The column 32 is fixedly connected to the top of the fixed plate 31, mainly used to support and fix the flat washer 33, maintaining the structural stability of the entire sensing component 3, and ensuring that the induction coil clamping device 35 can be accurately installed in the fixed position. The flat washer 33 is fixedly connected to the top of the column 32, its main function being to provide a flat installation surface, and to connect the induction coil clamping device 35 through the bolts 34 at its four corners, ensuring the firmness and stability of the connection. The bolts 34 are used to fix the induction coil clamping device 35 to the flat washer 33, providing a firm fixing force through the threaded connection, ensuring that the induction coil clamping device 35 will not loosen or shift during the detection process.

[0031] Working principle:

[0032] like Figure 1 - Figure 5 As shown:

[0033] In use: First, the motor 28 is powered on and starts rotating at high speed. The reducer 21 connected to its output shaft can reduce the speed of high-speed rotation and increase the torque, forming a low-speed, high-torque power suitable for driving the impeller body 4 to rotate. The output shaft of the reducer 21 is connected to the first universal coupling 22, which in turn drives the first universal coupling 22 to rotate. The first universal coupling 22 is responsible for transmitting power to the lead screw 24 connected to it. The design of the first universal coupling 22 can compensate for the small angular deviation between the output shaft of the reducer 21 and the input shaft of the lead screw 24, ensuring smooth power transmission. When the lead screw 24 rotates, it converts the rotational motion into linear motion through the threaded engagement with the lifting column 25, driving the lifting column 25 to move up and down in the axial direction of the lead screw 24. The four lifting columns 25 are evenly distributed on the outside of the moving disk 26 and fixed. With a fixed connection, the moving disk 26 can be raised and lowered simultaneously while maintaining its horizontal position. The impeller body 4 is placed on the moving disk 26, with its bottom contacting the top of the lifting column 25. When the lifting column 25 is raised or lowered, the height of the moving disk 26 can be adjusted, thereby adjusting the up and down position of the impeller body 4. The outer side of the impeller body 4 is fitted onto the guide column 27, which guides its installation position and provides stable support during rotation. In the sensing component 3 at the top of the synchronously driven lifting assembly 2, the fixed disk 31 is connected to the moving disk 26, and the column 32 is connected to its top. The flat washer 33 provides a flat mounting surface at the top of the column 32. The induction coil clamping device 35 is fixed by bolts 34. The clamping device presses the induction coil tightly against the surface of the impeller body 4. When the motor 28 drives the impeller body 4 to rotate, the induction coil scans accordingly, realizing eddy current detection of micro-cracks on the impeller surface.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A rotary scanning support for eddy current detection of microcracks on impeller surfaces, comprising a chassis (1), characterized in that, It also includes a synchronous drive lifting assembly (2), which includes a reducer (21) fixedly connected to the chassis (1). A first universal coupling (22) is installed at both ends of the top of the chassis (1) near the reducer (21). A second universal coupling (23) is installed at each of the four corners of the top of the chassis (1). A lead screw (24) is provided inside the second universal coupling (23). A lifting column (25) is threaded to the outside of the lead screw (24). A movable disc (26) is fixedly connected to the outside of the four lifting columns (25). The top of the synchronous drive lifting assembly (2) is fixedly connected to a sensing assembly (3).

2. The rotary scanning bracket for eddy current detection of microcracks on the impeller surface according to claim 1, characterized in that: The sensing component (3) includes a fixed plate (31) fixedly connected to the movable plate (26), a column (32) fixedly connected to the top of the fixed plate (31), a flat washer (33) fixedly connected to the top of the column (32), bolts (34) fixedly connected to the four corners inside the flat washer (33), and an induction coil tightening device (35) fixedly connected to the top of the flat washer (33).

3. The rotary scanning bracket for eddy current detection of microcracks on impeller surfaces according to claim 1, characterized in that: The top of the chassis (1) is fixedly connected to a guide post (27), and an impeller body (4) is sleeved on the outside of the guide post (27).

4. The rotary scanning bracket for eddy current detection of microcracks on impeller surfaces according to claim 1, characterized in that: One end of the reducer (21) is fixedly connected to a motor (28), and a base (29) is fixedly connected to the outside of the motor (28).

5. The rotary scanning bracket for eddy current detection of microcracks on impeller surfaces according to claim 1, characterized in that: The chassis (1) is fixedly connected to four corners of its bottom with support legs (210).

6. The rotary scanning bracket for eddy current detection of microcracks on impeller surfaces according to claim 1, characterized in that: One end of two of the second universal joints (23) is connected to one of the first universal joints (22), and one end of the other two second universal joints (23) is connected to the other first universal joint (22).

7. The rotary scanning bracket for eddy current detection of microcracks on impeller surfaces according to claim 3, characterized in that: The bottom end of the impeller body (4) is in contact with the top end of the lifting column (25).

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