Follow-up rotor gap measuring device

Abstract

The utility model provides a follow-up rotor clearance measuring device, which relates to the technical field of precision measurement and comprises a measuring tube, a connecting shaft penetrates through the inside of the measuring tube, a rotating head is mounted at the top end of the connecting shaft, a pointed cone is clamped at the bottom of the measuring tube, a sliding sleeve frame is slidably connected to the front of the measuring tube, and the sliding sleeve frame slides back and forth. The follow-up rotor gap measuring device comprises a measuring tube, a plurality of sliding sleeve frames are arranged on the front side of the measuring tube, limiting strips are arranged on the two sides in the sliding sleeve frames, four sets of sliding sleeve frames are arranged on the front side of the measuring tube, pressure sensing units are embedded in the front sides of the sliding sleeve frames, and transmission modules are connected to the sides, close to the pressure sensing units, of the front sides of the sliding sleeve frames. The movable disc and the arc-shaped groove are combined to drive the sliding push plate and the protruding column to achieve automatic forward stretching of the sliding sleeve frame, and different heights and complex shapes in the gap can be adapted.

Description

TECHNICAL FIELD

[0001] The utility model relates to precision measurement technical field especially relates to a follow -up formula rotor gap measuring device. BACKGROUND

[0002] The follow -up formula rotor gap measuring device is a kind of equipment for detecting the gap width between rotor and stator, is widely used in industrial field, especially in the case where rotor gap is not consistent from top to bottom, such as upper narrow lower wide or upper wide lower narrow scene, can be used to verify whether gap size meets design requirement, ensure the safety and stability of equipment operation.

[0003] In prior art, the measurement of rotor gap usually adopts mechanical ranging tool or laser ranging equipment.Mechanical ranging tool measures gap by manual operation, but the precision is low, and it is difficult to adapt to complex gap shape.Laser ranging equipment, as a kind of high-precision measuring instrument, can realize non-contact measurement, but there are the following problems in actual application: the existing laser ranging equipment cannot automatically adapt to different heights and angles in gap, especially when facing the gap of upper narrow lower wide or upper wide lower narrow, it needs manual adjustment of ranging angle multiple times, and the operation is tedious and inefficient, and the equipment is large in size, inconvenient to carry and use in narrow space.

[0004] Therefore, a follow -up formula rotor gap measuring device is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in prior art, and provides a follow -up formula rotor gap measuring device.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme: a follow -up formula rotor gap measuring device, including the inside of measurement pipe is penetrated by connecting shaft, the top of connecting shaft is installed with the head, the bottom of measurement pipe is clamped with sharp cone, the front surface of measurement pipe is slidably connected with sliding sleeve frame, the sliding sleeve frame is slid forward and backward, the both sides in sliding sleeve frame are equipped with limit strip, the front surface of measurement pipe has four groups of sliding sleeve frame, the front surface of sliding sleeve frame is embedded with pressure sensing unit, the side close to pressure sensing unit of the front surface of sliding sleeve frame is connected with transmission module.

[0007] Preferably, the bottom of the head is provided with a stop plate, the inside of the measurement pipe is clamped with a bearing plate, the top of the bearing plate is clamped with a chuck, and the top of the chuck is movably connected with a movable disc.

[0008] Preferably, the back surface of the top of the movable disc is provided with a through hole, and the connecting shaft penetrates the through hole.

[0009] Preferably, the surface of the connecting shaft is provided with an adapter ring opening, the inside of the adapter ring opening is clamped with a collar, and the collar and the top through hole of the movable disc are clamped.

[0010] Preferably, one side of the top of the movable disc is provided with an arc-shaped groove, the front surface of one side of the movable disc is provided with a sliding groove, and the inside of the sliding groove is slidably connected with a sliding push plate.

[0011] Preferably, the top of the end of the sliding push plate is provided with a convex column, the convex column is telescopic, and the convex column penetrates the arc-shaped groove.

[0012] Preferably, the front surface of the sliding push plate is provided with a threaded interface, the inside of the sliding sleeve frame is provided with a connecting column, and the connecting column and the threaded interface are threadedly connected.

[0013] Beneficial effects

[0014] In the utility model, the four groups of sliding sleeve frames arranged in layers on the front surface of the measuring tube are driven by the movable disc and the arc-shaped groove to automatically extend the sliding sleeve frame through the sliding push plate and the convex column, the sliding sleeve frame can adapt to different heights and complex shapes in the gap, such as the scene of being narrow at the top and wide at the bottom or being wide at the top and narrow at the bottom, manual adjustment of the ranging angle is not needed, the detection efficiency is significantly improved, and the problems of difficult angle adjustment and complicated operation of the existing laser ranging equipment are overcome.

[0015] In the utility model, the whole detection instrument can be applied to measurement under various conditions, and the difference in the rotor gap distance detected is not worried. ACCURATE DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the utility model;

[0017] Figure 2 It is the internal structure diagram of the measuring tube of the utility model;

[0018] Figure 3 It is the sliding sleeve frame structure diagram of the utility model;

[0019] Figure 4 It is the internal structure diagram of the sliding sleeve frame of the utility model;

[0020] Figure 5 It is the chuck bottom structure diagram of the utility model;

[0021] Figure 6 It is the chuck top structure diagram of the utility model;

[0022] Figure 7 It is the front view of the chuck of the utility model;

[0023] Figure 8 It is the connecting shaft structure diagram of the utility model.

[0024] Legend:

[0025] 1. measuring tube; 2. resistance plate; 3. rotating head; 4. connecting shaft; 5. sliding sleeve frame; 6. chuck; 7. adapter ring; 8. pressure sensing unit; 9. transmission module; 10. limiting strip; 11. connecting column; 12. sliding push plate; 13. sliding groove; 14. arc-shaped groove; 15. through hole; 16. movable disc; 17. convex column; 18. sleeve ring; 19. threaded interface; 20. sharp cone; 21. bearing plate. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] The specific embodiments of the utility model are described below in combination with the drawings. Embodiment one:

[0029] Reference Figures 1-8 A follow-up type rotor gap measuring device, comprising a measuring tube 1, a connecting shaft 4 is penetrated through the inside of the measuring tube 1, a rotating head 3 is installed at the top end of the connecting shaft 4, a sharp cone 20 is clamped at the bottom of the measuring tube 1, a sliding sleeve frame 5 is slidably connected to the front of the measuring tube 1, the sliding sleeve frame 5 slides forward and backward, limiting strips 10 are arranged on both sides in the sliding sleeve frame 5, there are four groups of sliding sleeve frames 5 on the front of the measuring tube 1, pressure sensing units 8 are embedded on the front of the sliding sleeve frame 5, transmission modules 9 are connected to the side of the sliding sleeve frame 5 close to the pressure sensing unit 8, and the pressure sensing unit 8 is electrically connected to the transmission module 9 (a processor is needed between the two for data acquisition, processing and transmission control).

[0030] Figure 1The whole device is shown, when detecting, the device is inserted into the gap through the bottom pointed cone 20 first, then the whole measuring tube 1 is placed into the gap, the stop plate 2 is convenient for the user to fix the bottom device, and the back of the measuring tube 1 is provided with a magnet, after the whole measuring tube 1 is placed into the gap, the back will be attracted together with the device to be detected, so that the whole measuring tube 1 can maintain a stable state, and four groups of sliding sleeve frames 5 are arranged on the front of the measuring tube 1, each group of sliding sleeve frames 5 has the same structure, and the detection principle of the whole device is mainly to indirectly detect the distance through the pressure sensing unit 8 on the front of the sliding sleeve frame 5, and the detection data is transmitted to the user through the transmission module 9. Four groups of sliding sleeve frames 5 can detect multiple depths in the gap, so as to prevent some from being narrow at the top and wide at the bottom, or wide at the top and narrow at the bottom.

[0031] The bottom of the rotating head 3 is provided with a stop plate 2, the inside of the measuring tube 1 is provided with a bearing plate 21, the top of the bearing plate 21 is provided with a chuck 6, and the top of the chuck 6 is movably connected with a movable disc 16. The chuck 6 and the movable disc 16 are integrated, and the movable disc 16 can rotate.

[0032] The back of the top of the movable disc 16 is provided with a through hole 15, and the connecting shaft 4 penetrates through the through hole 15. The surface of the connecting shaft 4 is provided with an adapter ring hole 7, the inside of the adapter ring hole 7 is provided with a sleeve ring 18, and the sleeve ring 18 is connected with the top through hole 15 of the movable disc 16.

[0033] The top end of the connecting shaft 4 is provided with a rotating head 3 which can be connected with a motor structure and driven by the motor, or manually rotated. When the rotating head 3 rotates, the connecting shaft 4 at the bottom rotates, which indirectly drives each layer of the movable disc 16 to rotate.

[0034] One side of the top of the movable disc 16 is provided with an arc-shaped groove 14, the front of one side of the movable disc 16 is provided with a sliding groove 13, the inside of the sliding groove 13 is slidably connected with a sliding push plate 12, the top of the tail end of the sliding push plate 12 is provided with a convex column 17, the convex column 17 is telescopic, the convex column 17 penetrates through the arc-shaped groove 14, the front of the sliding push plate 12 is provided with a threaded interface 19, the inside of the sliding sleeve frame 5 is provided with a connecting column 11, and the connecting column 11 is screwed with the threaded interface 19.

[0035] Attached Figures 5-7The sliding principle and sliding path of the sliding sleeve frame 5 are illustrated. The structure on the movable disc 16 is similar to an automatic closer. With the rotation of the movable disc 16 through the arc-shaped groove 14, the arc-shaped groove 14 can pull and push the sliding push plate 12, depending on the rotation direction of the movable disc 16. The arc-shaped groove 14 of the movable disc 16 and the convex column 17 are fitted, and the arc-shaped groove 14 will pull the convex column 17 to move the sliding push plate 12. The sliding push plate 12 can move forward and backward. When detecting the gap, the sliding push plate 12 will move forward until it abuts against the wall on one side of the gap. It should be noted that the convex column 17 can be automatically extended and retracted. Since the four-layer sliding sleeve frame 5 will move forward at the same time, if the gap is different, such as one layer first abutting against the wall and detecting the gap, while the other layers have not abutted against the wall and detected, at this time, after the user receives the detected data, the convex column 17 of the layer is remotely controlled to retract. In this way, when all the sliding sleeve frames 5 are extended forward, the sliding sleeve frame 5 with the retracted convex column 17 is pushed back by the inner wall, which does not affect the continuous detection of other height positions. Embodiment two:

[0037] Reference Figures 1-8 The present follow-up rotor gap measuring device is a device for detecting the gap width between the rotor and the stator, and is particularly suitable for the case where the gap width is inconsistent from top to bottom, such as top narrow and bottom wide or top wide and bottom narrow. Four sliding sleeve frames 5 are arranged in layers to detect the gap at different heights. The pressure sensing unit 8 is used to sense the contact pressure and indirectly calculate the gap width. The data is transmitted to the user through the transmission module, and has a remote control function to adapt to complex gap environments.

[0038] A bar-shaped neodymium iron boron magnet, model N35, is embedded on the back of the measuring tube 1 for adsorption on the device to be detected to maintain stability. The measuring tube 1 is connected to the sharp cone 20 through a clamping groove structure. The sharp cone 20 is a conical structure. The measuring tube 1 is internally fixed with a carrier plate 21, which is a strip-shaped steel plate and has four layers located at different heights in the measuring tube 1. The carrier plate 21 is used to support the upper chuck 6 and movable disc 16.

[0039] The front of the measuring tube 1 is provided with four groups of sliding sleeve frames 5, each group of sliding sleeve frames 5 corresponding to the height of a plate 21 for layered detection of the gap width. The sliding sleeve frame 5 is a rectangular frame structure made of aluminum alloy, and the inside of both sides is provided with symmetrical limiting strips 10, which are long strip-shaped protrusions, used to limit the sliding direction of the sliding sleeve frame 5, so that it can only slide forward and backward. The front of the sliding sleeve frame 5 is embedded with a pressure sensing unit 8, model Honeywell FSS1500NSB, range 0 to 1500 grams, accuracy positive and negative 0.5%, used to sense the pressure when the sleeve frame contacts the inner wall of the gap, so as to indirectly judge the gap distance. The side of the sliding sleeve frame 5 close to the pressure sensing unit 8 is connected with a transmission module 9, the transmission chip used in the transmission module 9 is model NordicSemiconductor nRF52832, supporting Bluetooth 5.0 protocol, used to transmit the data detected by the pressure sensing unit 8 to the user through Bluetooth. The inside of the sliding sleeve frame 5 is provided with a connecting column 11, the surface of the connecting column 11 is provided with external threads, used to connect with the threaded interface 19 on the sliding push plate 12.

[0040] The inside of the measuring tube 1 is provided with a connecting shaft 4, which is a cylindrical steel rod that penetrates through the entire measuring tube 1, and the top end is provided with a rotating head 3, which is a cylindrical knob with a diameter of 20 mm and a height of 15 mm, which can be manually rotated or connected with a motor for driving. The surface of the connecting shaft 4 is provided with four groups of adapter ring ports 7, each group of adapter ring ports 7 is an annular groove, respectively located at different heights on the connecting shaft 4, corresponding to the height of the plate 21. The inside of the adapter ring port 7 is clamped with a sleeve ring 18, which is an annular structure, clamped with the through hole 15 on the top of the movable disc 16. The through hole 15 is a circular opening on the back of the movable disc 16, used to let the connecting shaft 4 pass through and fix the sleeve ring 18.

[0041] The top of the plate 21 is clamped with a chuck 6, which is a circular base, and the movable disc 16 is a circular disc that can rotate around the center of the chuck 6. The movable disc 16 is connected with the chuck 6 through a bearing, the model of the bearing is 608ZZ, which ensures the smooth rotation of the movable disc 16. The top of the movable disc 16 is provided with a through hole 15 on the back, which is connected with the connecting shaft 4 and the sleeve ring 18, so that the movable disc 16 rotates with the connecting shaft 4. The top of the movable disc 16 is provided with an arc-shaped groove 14 on one side, which is an arc-shaped groove used to guide the movement of the convex column 17. The front of the movable disc 16 is provided with a sliding groove 13 on one side, which is a straight-line-shaped groove, and the inside is slidingly connected with a sliding push plate 12, which is a rectangular plate, and the end of the top is provided with a convex column 17, which is a telescopic cylinder with a diameter of 3 mm and an initial height of 5 mm, and a micro electromagnetic valve is installed inside, model SMCVQ110-5F, which can be controlled remotely to extend and retract. The convex column 17 penetrates through the arc-shaped groove 14 and moves with it, and the front of the sliding push plate 12 is provided with a threaded interface 19, which is an internal threaded hole with a diameter of 5 mm, which is screwed with the connecting column 11 of the sliding sleeve frame 5.

[0042] The bottom of the rotating head 3 is provided with a stop plate 2, which is a circular plate with a diameter of 40 mm and a thickness of 5 mm made of aluminum alloy, which is convenient for the user to hold and fix the bottom of the device. At the same time, the stop plate 2 is connected with the bottom of the measuring tube 1 through threads, ensuring stable installation.

[0043] The working principle of the device is as follows: first, the device is inserted into the gap through the pointed cone 20 at the bottom, which facilitates penetration and preliminary positioning. Then the entire measuring tube 1 is placed into the gap, and the stop plate 2 is held by the user to fix the bottom of the device. At the same time, the neodymium-iron-boron magnet on the back of the measuring tube 1 is attracted to the device to be detected, keeping the measuring tube 1 in a stable state. The four groups of sliding sleeve frames 5 arranged on the front of the measuring tube 1 are located at different heights, respectively, for detecting the width change of the gap from top to bottom. The user rotates the rotating head 3 or starts the motor to drive the rotating head 3 to rotate, which drives the connecting shaft 4 to rotate, and the connecting shaft 4 indirectly drives the four layers of movable discs 16 to rotate through the adapter ring 7 and the sleeve ring 18. When the movable disc 16 rotates, the arc-shaped groove 14 on it pulls the convex column 17, which drives the sliding push plate 12 to move forward and backward along the sliding groove 13. Since the sliding push plate 12 is connected with the sliding sleeve frame 5 through the threaded interface 19 and the connecting column 11, the sliding sleeve frame 5 slides forward and backward on the front of the measuring tube 1.

[0044] During detection, rotating the rotating head 3 makes the sliding sleeve frame 5 move forward, and the pressure sensing unit 8 on the front of the sliding sleeve frame 5 contacts the wall on one side of the gap. When the pressure reaches the set threshold value, it indicates that it has been in close contact with the wall. The pressure sensing unit 8 is model Honeywell FSS1500NSB, with a range of 0 to 1500 grams and an accuracy of plus or minus 0.5%. Its detection principle is based on the piezoresistive effect. When the sliding sleeve frame 5 is in close contact with the inner wall of the gap, pressure acts on the silicon diaphragm inside the sensing unit 8, causing the silicon diaphragm to deform and causing the internal resistance to change. The resistance change is converted into a voltage signal through a Wheatstone bridge circuit, and the voltage signal is processed by an internal amplification circuit and output to the transmission module 9. The device indirectly detects the gap width by pre-calibrating the relationship between pressure and gap width. The specific calibration method is to test in a gap of known width, record the gap width corresponding to different pressure values, and form a pressure-width mapping table stored in the internal memory of the transmission module 9. During actual detection, the pressure sensing unit 8 measures the pressure value, for example 500 grams, and through the mapping table, the corresponding gap width is found, for example 5 mm. The transmission module 9 sends this width data to the user's receiving device, such as a mobile phone or computer application, through Bluetooth 5.0 protocol. The application displays data such as "2 cm height 5 mm". The transmission module 9 is model NordicSemiconductornRF52832, with a transmission distance of up to 10 meters and a data refresh rate of 10 times per second, ensuring real-time performance.

[0045] Since the four groups of sliding sleeve frames 5 are arranged in layers and simultaneously extend forward, the gap distance of different heights of the gap can be detected respectively, and the situation of upper narrow and lower wide or upper wide and lower narrow can be adapted. If a certain layer of sliding sleeve frame 5 first adheres to the inner wall of the gap, for example, the probe with a height of 2 cm detects a width of 3 mm, while other layers have not yet adhered, after the user receives the data of this layer through the application, the convex column 17 on the sliding push plate 12 can be remotely controlled to retract, and the micro electromagnetic valve SMCVQ110-5F inside the convex column 17 drives the convex column 17 to retract after receiving the instruction through Bluetooth, so that the convex column 17 is separated from the driving of the arc-shaped groove 14. At this time, the sliding sleeve frame 5 of this layer is pushed back under the resistance of the inner wall of the gap due to the loss of the driving force of the movable disc 16, which does not affect the continuous forward detection of other layers. Other sliding sleeve frames 5 continue to extend forward until they adhere to the inner wall of the gap respectively, and the detection of all heights is completed. After the detection is completed, the rotating head 3 is rotated in the reverse direction, the movable disc 16 drives the sliding push plate 12 to move backward, the sliding sleeve frame 5 is retracted to the initial position, and the equipment can be taken out.

[0046] The control principle relies on the micro electromagnetic valve SMCVQ110-5F of the convex column 17. The user sends instructions through the application, the instructions are transmitted to the transmission module 9 through Bluetooth, the transmission module 9 controls the electromagnetic valve to be powered on or powered off, drives the convex column 17 to extend or retract, and realizes independent control of the sliding sleeve frame 5. The working voltage of the electromagnetic valve SMCVQ110-5F is 24 volts, and the response time is 5 milliseconds, which ensures fast switching. The power supply voltage of the pressure sensing unit 8 and the transmission module 9 is 3.3 volts, and the power consumption is 5 milliamperes and 10 milliamperes respectively, which are powered by the lithium battery inside the measuring pipe 1. The battery model is CR2032, with a capacity of 220 milliamperes, and can work continuously for 20 hours.

[0047] The sliding distance range of the sliding sleeve frame 5 is 0 to 30 mm, and the limiting strip 10 ensures the stability of the sliding direction. The whole process is efficient and stable, and is suitable for industrial rotor gap detection.

[0048] In summary:

[0049] 1. The follow-up rotor gap measuring device in the device realizes stable insertion gap through the structure of the measuring tube 1 and the sharp cone 20, the N35 Nd-Fe-B magnet embedded on the back ensures that the device is adsorbed on the device to be detected to keep stable, four groups of sliding sleeve frames 5 arranged in layers on the front of the measuring tube 1 are located at the height of 2cm, 4cm, 6cm and 8cm respectively, the contact pressure is sensed by using the pressure sensing unit Honeywell FSS1500NSB, the gap width is indirectly calculated through the pre-calibrated pressure-width mapping table, and data is transmitted in real time to a user application program by the Bluetooth 5.0 protocol of the transmission module Nordic Semiconductor nRF52832. The rotating head 3 drives the connecting shaft 4 and the movable disc 16 to rotate, the arc-shaped groove 14 pulls the retractable convex column 17 and the sliding push plate 12, pushes the sliding sleeve frame 5 to stretch forward, adapts to the gap which is narrow at the top and wide at the bottom or wide at the top and narrow at the bottom, the SMC VQ110-5F miniature electromagnetic valve in the convex column 17 supports remote control contraction, ensures that multi-layer detection is not disturbed, the overall design is efficient and stable, and is suitable for industrial rotor gap detection.

[0050] 2. The follow-up rotor gap measuring device adopts the supporting plate 21 and the chuck 6 inside the measuring tube 1 to support four layers of movable discs 16, the connecting shaft 4 drives the movable disc 16 to rotate through the adapter ring opening 7 and the sleeve ring 18, the sliding groove 13 and the arc-shaped groove 14 on the movable disc 16 guide the sliding push plate 12 and the convex column 17 to drive the sliding sleeve frame 5 to slide forward and backward, the pressure sensing unit Honeywell FSS1500NSB detects the contact pressure through the piezoresistive effect, and real-time display of the gap width at different heights is realized in combination with the Bluetooth transmission of the transmission module Nordic Semiconductor nRF52832, the sharp cone 20 and the stop plate 2 facilitate insertion and fixation, and the N35 magnet on the back enhances stability. The device supports manual or NEMA17 step motor driving, the SMC VQ110-5F electromagnetic valve of the convex column 17 realizes independent adjustment through remote control, adapts to complex gap environment, four-layer synchronous detection ensures comprehensiveness, and CR2032 lithium battery power supply is combined, operation is simple, precision is high, and the device is suitable for various industrial applications.

[0051] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under", can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other features between them. Moreover, first feature is in second feature "on", "above" and "upper surface" includes that first feature is directly above and obliquely above second feature, or only indicates that the horizontal height of first feature is higher than second feature. First feature is in second feature "under", "below" and "lower surface" includes that first feature is directly below and obliquely below second feature, or only indicates that the horizontal height of first feature is less than second feature.

[0052] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A follower-type rotor clearance measuring device, comprising a measuring tube (1), characterized in that: The measuring tube (1) has a connecting shaft (4) running through its interior. A rotating head (3) is installed at the top of the connecting shaft (4). A pointed cone (20) is snapped into the bottom of the measuring tube (1). A sliding sleeve (5) is slidably connected to the front of the measuring tube (1). The sliding sleeve (5) slides back and forth. Limiting strips (10) are provided on both sides inside the sliding sleeve (5). There are four sets of sliding sleeves (5) on the front of the measuring tube (1). A pressure sensing unit (8) is embedded in the front of each sliding sleeve (5). A transmission module (9) is connected to the side of the front of each sliding sleeve (5) near the pressure sensing unit (8). The transmission module (9) is electrically connected to the pressure sensing unit (8).

2. The follower-type rotor clearance measuring device according to claim 1, characterized in that: The bottom of the rotating head (3) is fitted with a backing plate (2), the inside of the measuring tube (1) is fitted with a support plate (21), the top of the support plate (21) is fitted with a chuck (6), and the top of the chuck (6) is movably connected with a movable disc (16).

3. The follower-type rotor clearance measuring device according to claim 2, characterized in that: The top back of the movable disc (16) has a through-hole (15), through which the connecting shaft (4) passes.

4. The follower-type rotor clearance measuring device according to claim 3, characterized in that: The surface of the connecting shaft (4) is provided with an adapter ring (7), and a collar (18) is engaged inside the adapter ring (7). The collar (18) is engaged with the top opening (15) of the movable disc (16).

5. The follower-type rotor clearance measuring device according to claim 4, characterized in that: An arc-shaped groove (14) is provided on one side of the top of the movable plate (16), and a sliding groove (13) is provided on the front side of one side of the movable plate (16). A sliding push plate (12) is slidably connected inside the sliding groove (13).

6. The follower-type rotor clearance measuring device according to claim 5, characterized in that: The top of the end of the sliding push plate (12) is provided with a protruding post (17), which is retractable and passes through the arc-shaped groove (14).

7. The follower-type rotor clearance measuring device according to claim 6, characterized in that: The sliding push plate (12) has a threaded interface (19) on its front side, and the sliding sleeve (5) has a connecting post (11) inside, and the connecting post (11) and the threaded interface (19) are threadedly connected.

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