Generator concentricity detection device and method of use

Abstract

The application relates to the technical field of concentricity detection, in particular to a generator concentricity detection device and a use method thereof. The device comprises a base, and a slide rail is fixedly arranged on the base. A mounting seat with a self-locking function is slidably arranged on the slide rail. When the rotating shaft is inserted into and pulled out of the rubber film, the larger the diameter of the rotating shaft is, the smaller the sleeving area of the rubber film is, the rubber film is separated from the rotating shaft faster, the slip ring is quickly reset under the action of a return spring, a connecting rod is used to close the air pump, and the moving-down amount of the air-tight column is reduced. The smaller the diameter of the rotating shaft is, the larger the sleeving area of the rubber film is, and the slower the slip ring is reset. The working time of the air pump is prolonged, and the moving-down amount of the air-tight column is increased. In the whole process, the parameters of the detection mechanism do not need to be manually adjusted, the lever micrometer can be accurately abutted against rotating shafts with different diameters, the adaptation range of the device to multiple specifications of generators is greatly improved, the operation process is simplified, and the manual adjustment cost and operation difficulty are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concentricity detection, in particular to a generator concentricity detection device and use method. BACKGROUND

[0002] In the production and maintenance process of the generator, the shaft concentricity is a key indicator affecting the running stability and service life of the generator. If the shaft concentricity deviation is too large, vibration and noise may occur during operation, and even bearing wear and winding insulation damage may occur. Therefore, the shaft concentricity needs to be accurately detected.

[0003] However, the existing generator shaft concentricity detection equipment has the following technical problems:

[0004] Poor adaptability and complicated operation: the traditional detection device is designed with fixed specifications. For different diameter generator shafts, the worker needs to disassemble and replace the appropriate clamp or adjust the position of the detection mechanism. This not only complicates the operation steps and takes a long time, but also affects the detection accuracy due to manual adjustment errors, making it difficult to meet the batch detection needs of multiple specifications of generators.

[0005] Probe pressure and zero dependence on manual operation, unstable precision: the contact pressure between the lever dial gauge probe and the shaft needs to be adjusted manually during detection. If the pressure is too large, it may scratch the surface of the shaft or cause the probe to deform. If the pressure is too small, it may cause intermittent contact and cause data jumps. At the same time, the zero display needs to be observed and manually adjusted, which depends on experience. The adjustment standards of different operators differ, resulting in inconsistent initial detection states and further reducing the reliability of the detection data.

[0006] No monitoring of installation gap, easy to produce invalid detection: during the assembly of the lever dial gauge and the detection mechanism, if there is a gap between the pin and the mounting hole, it may cause the probe to deviate. However, the existing device has no real-time monitoring mechanism, and workers cannot detect this problem. Invalid detection data may be obtained based on the deviated probe, which requires re-detection, increasing the cost and time cost of rework.

[0007] In view of this, we propose a generator concentricity detection device and use method. SUMMARY

[0008] The purpose of the present application is to provide a generator concentricity detection device and use method to solve the problems of multi-specification shaft adaptation difficulty, probe pressure and zero dependence on manual operation, and no monitoring of installation gap. To achieve the above purpose, the present application provides the following technical scheme: a generator concentricity detection device, comprising a base, and a slide rail is fixedly arranged on the base, and a mounting seat with self-locking function is slidably arranged on the slide rail;

[0009] The rear side of the base is fixedly provided with an air-tight tube, and a through slot is formed in the side surface of the air-tight tube, an L-shaped air-tight column is slidably arranged in the air-tight tube and the through slot, a spring is arranged at the bottom of the air-tight tube to push the air-tight column upward, an air pump is fixedly arranged at the top of the air-tight tube to inject air into the air-tight tube and push the air-tight column downward, and a lever micrometer is arranged at the outer end of the air-tight column to abut against the rotating shaft of the generator.

[0010] A socket is fixedly arranged on the base, a plug hole is formed in the side of the socket for inserting the rotating shaft of the generator, a sliding ring is slidably arranged in the plug hole, and a reset spring is arranged in the plug hole to reset the sliding ring.

[0011] An annular rubber film is fixedly arranged on the inner ring of the sliding ring, and a connecting rod is arranged on one side of the sliding ring to start the air pump.

[0012] Preferably, a gas hole is formed in the air-tight column to extend through the top, and air tubes are fixedly arranged on both sides of the air-tight column and communicate with the gas hole.

[0013] The tube heads of the air tubes extend to the probe of the lever micrometer, and embedding holes are formed in the opposite sides of the tube heads of the two air tubes, magnetic columns are slidably arranged in the embedding holes to close the air tubes, and tension springs are arranged in the embedding holes to reset the magnetic columns.

[0014] When the probe of the lever micrometer deviates from the air tubes, the two magnetic columns attract each other to open the air tubes and make the air-tight column move upward until the probe of the lever micrometer reaches the position of the air tubes and abuts against the rotating shaft of the generator.

[0015] Preferably, an installation hole is formed in the outer end of the air-tight column and communicates with the gas hole, and a latch is fixedly arranged on the lever micrometer and is fixed by bolts.

[0016] Preferably, the sliding rail is a T-shaped sliding rail, and a T-shaped slot is formed in the bottom of the mounting seat and is adapted to the T-shaped sliding rail, and wear-resistant gaskets are arranged on the inner side walls of the T-shaped slot.

[0017] Preferably, an O-shaped sealing ring is arranged between the air-tight column and the inner wall of the air-tight tube, and the O-shaped sealing ring is embedded in an annular groove formed in the outer circumferential surface of the air-tight column.

[0018] Preferably, a conical surface transition section is arranged on the inner wall of the plug hole of the socket near the opening, and the large-diameter end of the conical surface transition section faces the opening direction of the plug hole.

[0019] Preferably, an annular clamping groove is formed in the outer circumferential surface of the latch, a locking bolt is threadedly connected to the hole wall of the installation hole and is adapted to the annular clamping groove, and the end of the locking bolt extends into the annular clamping groove to form a limit.

[0020] A method for using a generator concentricity detection device, comprising the following steps:

[0021] S1, the generator is placed on the mounting seat and fixed, the rotating shaft is aligned with the insertion hole and inserted, so that the rotating shaft passes through the annular rubber film, until the rubber film is completely sleeved on the outer periphery of the rotating shaft, then the rotating shaft is slowly pulled out, during the pulling-out process, the rotating shaft drives the rubber film to move outward synchronously, the rubber film pulls the slip ring to slide outward along the insertion hole, the slip ring stretches the internal reset spring, when the slip ring moves, the connecting rod on one side of the slip ring moves together, triggering the air pump to start.

[0022] S2, the air pump injects air into the air-tight tube, pushes the air-tight column to slide downward along the air-tight tube, and the outer end of the lever micrometer moves downward, until the micrometer probe contacts the outer periphery of the rotating shaft, during the process, the rubber film is sleeved on the rotating shaft with different diameters: the larger the diameter of the rotating shaft, the smaller the area of the rubber film sleeved on the rotating shaft, and the faster the rubber film separates from the rotating shaft when the rotating shaft is pulled out, the slip ring is quickly reset under the tension of the reset spring, the connecting rod is closed after the slip ring is reset, the air pump, and the air-tight column stops moving downward; the smaller the diameter of the rotating shaft, the larger the area of the rubber film sleeved on the rotating shaft, the slower the slip ring resets, the longer the air pump works, and the greater the downward movement of the air-tight column, finally realizing the automatic adaptation of the downward movement of the lever micrometer and the diameter of the rotating shaft.

[0023] S3, when the lever micrometer probe contacts the rotating shaft, the probe is deflected upward by the rotating shaft, deviating from the position of the tube head of the air tube on both sides of the air-tight column, at this time, the two magnetic columns in the embedded hole of the tube head of the air tube lose the block of the probe, and are attracted to each other under the action of magnetic force, opening the air tube channel, the gas in the air-tight tube leaks outward through the air hole and the air tube, the air-tight column slowly moves upward under the elastic force of the spring at the bottom, until the lever micrometer probe falls to the position of the tube head of the air tube and stably adheres to the rotating shaft, at this time, the air tube is blocked by the probe again, the magnetic column is reset under the action of the tension spring to close the air tube, and the air-tight column stops moving, realizing the automatic adjustment of the probe along the pressure of the rotating shaft, and the lever micrometer completes the automatic zero reset because the probe is in a stable adhering state.

[0024] S4, the air hole in the air-tight column is in communication with the mounting hole at the outer end, if there is an assembly gap between the latch of the lever micrometer and the mounting hole, the high-pressure gas in the air hole will leak from the gap, resulting in loss of pressure in the air-tight tube, the air-tight column moves upward under the action of the spring, and the lever micrometer probe separates from the rotating shaft, at this time, the machine needs to be stopped for checking the cooperation state of the latch and the mounting hole, and the latch is fastened again through the bolt, until there is no leakage of the air hole and the lever micrometer can stably adhere to the rotating shaft, to ensure the accuracy of the subsequent detection data, if the latch and the mounting hole are tightly matched without gap, the concentricity detection link can be directly entered.

[0025] Compared with the prior art, the beneficial effects of the present application are:

[0026] In the application, through the linkage structure of "rubber film - slip ring - connecting rod - air pump", different diameters of generator shafts can be automatically adapted. When the shaft is inserted into and pulled out of the rubber film, the larger the diameter of the shaft, the smaller the sleeve area of the rubber film, the rubber film is separated from the shaft faster, the slip ring is quickly reset under the action of the return spring and the air pump is closed through the connecting rod, and the downward displacement of the air-tight column is reduced; the smaller the diameter of the shaft, the larger the sleeve area of the rubber film, the slower the reset of the slip ring, the working time of the air pump is prolonged, and the downward displacement of the air-tight column is increased. The whole process does not need manual adjustment of the detection mechanism parameters, so that the lever dial gauge can accurately abut against shafts with different diameters, greatly improving the adaptation range of the device to generators of multiple specifications, simplifying the operation process, and reducing the cost and difficulty of manual adjustment.

[0027] In the application, through the air-tight control structure of "air pipe - magnetic column - tension spring - air hole", the contact state of the lever dial gauge probe and the shaft can be automatically optimized. When the probe initially contacts the shaft, the probe is biased to make the magnetic column attract and open the air pipe, the air-tight column moves upward under the action of the spring after the air pipe is depressurized, and the probe falls back to the stable fitting position, at which time the probe blocks the air pipe and the magnetic column resets to close the channel, not only realizing the automatic adjustment of the probe pressure, but also avoiding damage to the shaft due to excessive pressure or unstable contact due to insufficient pressure, and simultaneously completing the zero reset of the lever dial gauge. The design eliminates the errors of manual adjustment of the pressure and zero reset operation, ensures the uniformity of the initial state of detection, and significantly improves the accuracy and reliability of the concentricity detection data.

[0028] In the application, the mounting gap monitoring mechanism is formed by the communication between the air hole in the air-tight column and the mounting hole of the lever dial gauge bolt. If there is an assembly gap between the bolt and the mounting hole, the high-pressure gas in the air hole will leak, causing the air-tight tube to lose pressure, the air-tight column to move upward and the probe to separate from the shaft, directly indicating that the installation is abnormal. This design can real-time troubleshoot the detection deviation risk caused by loose bolt installation, avoid invalid detection data being obtained by the staff without knowing, reduce the rework cost, guide the staff to tighten the bolt in time, and ensure that the detection mechanism is in a stable and reliable working state, thereby ensuring the effectiveness of the concentricity detection result from the source. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0030] Figure 2 is a schematic diagram of the structure of the connecting rod and the air pump of the application;

[0031] Figure 3 is a sectional view of the three-dimensional structure of the connecting rod and the socket of the application;

[0032] Figure 4 is a sectional view of the three-dimensional structure of the socket, the slip ring and the rubber film of the application;

[0033] Figure 5The structural schematic diagram of the air-tight tube, air-tight column and lever micrometer of the present application;

[0034] Figure 6 The structural schematic diagram of the air-tight tube, air-tight column and lever micrometer of the present application; Figure 5 The enlarged view of A in the present application;

[0035] Figure 7 The structural schematic diagram of the air-tight tube, air-tight column and lever micrometer of the present application;

[0036] Figure 8 The structural schematic diagram of the air-tight tube, air-tight column and lever micrometer of the present application;

[0037] Figure 9 The structural schematic diagram of the air-tight tube, air-tight column and lever micrometer of the present application; Figure 8 The enlarged view of B in the present application.

[0038] In the figure: 1, base; 2, slide rail; 3, mounting seat; 4, air-tight tube; 5, through slot; 6, air-tight column; 7, spring; 8, air pump; 9, lever micrometer; 10, socket; 11, insertion hole; 12, slip ring; 13, return spring; 14, adhesive film; 15, connecting rod; 16, air hole; 17, air tube; 18, embedded hole; 19, magnetic column; 20, tension spring; 21, mounting hole; 22, bolt. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0040] Please refer to Figures 1 to 9 The present application provides a technical solution: a generator concentricity detection device, which comprises a base 1. The base 1 is integrally cast from HT300 gray cast iron (weight≥15 kg, and four adjustable leveling foot pads are arranged at the bottom with a horizontal adjustment range of 5-10 mm), so as to ensure the overall stability of the device.

[0041] The upper surface of the base 1 is milled (flatness≤0.02 mm), and a slide rail 2 is fixedly arranged thereon. The slide rail 2 is two guide rods, or a T-shaped structure (cross-sectional size: width 30 mm×height 20 mm, length 500 mm, material 45 steel, surface chrome plating treatment, plating thickness 0.05 mm) can also be selected, and the slide rail 2 is rigidly connected with the base 1 through four groups of M8 internal hexagonal bolts (spacing 150 mm).

[0042] The mounting seat 3 with self-locking function is arranged to slide on the slide rail 2, a T-shaped slot (cooperating gap ≤0.05mm) matched with the slide rail 2 is formed in the bottom of the mounting seat 3, a 1mm-thick polytetrafluoroethylene wear-resistant pad (friction coefficient ≤0.1) is pasted on the inner side wall of the T-shaped slot, an arc-shaped positioning slot (matched with the arc of the generator shell, a silicone anti-skid pad with Shore hardness of 60HA is pasted in the slot) is arranged on the upper surface of the mounting seat 3, and two groups of adjustable pressing blocks (driven by M6 hand-screwed bolts, the bottom of each pressing block is covered with a rubber pad) are arranged.

[0043] The rear side of the base 1 is fixedly provided with an airtight pipe 4 through an L-shaped steel plate support (thickness of 8mm with reinforcing ribs), the airtight pipe 4 is a 304 stainless steel seamless pipe, a rectangular through slot 5 is formed in the side surface of the airtight pipe 4, and an L-shaped airtight column 6 is arranged to slide in the airtight pipe 4 and the through slot 5, the airtight column 6 is made of 6061-T6 aluminum alloy (surface anodized treatment, hardness of HV120), two annular grooves are formed in the outer circumferential surface of the airtight column 6, and a nitrile rubber O-shaped sealing ring is embedded in each groove.

[0044] A spring 7 for pushing the airtight column 6 to move upwards is arranged at the bottom of the airtight pipe 4, the spring 7 is a cylindrical helical compression spring, and the two ends of the spring 7 are respectively welded and fixed to the inner end surface of the bottom of the airtight pipe 4 and the bottom of the vertical section of the airtight column 6.

[0045] A gas pump 8 for injecting gas into the airtight pipe 4 and pushing the airtight column 6 to move downwards is fixedly arranged at the top of the airtight pipe 4 through a flange plate, the gas pump 8 is a micro diaphragm gas pump 8, a polytetrafluoroethylene gas pipe 17 (inner diameter of 6mm) is arranged between the gas outlet of the gas pump 8 and the top of the airtight pipe 4 to realize interface communication, and a copper quick connector is arranged at the interface.

[0046] A lever micrometer 9 abutting against the generator shaft is arranged at the outer end of the airtight column 6, the range of the lever micrometer 9 is 0-1mm, the accuracy is 0.001mm, and the probe is made of tungsten steel (hardness of HRC60).

[0047] A socket 10 is fixedly arranged on the base 1 through four groups of M6 bolts, the socket 10 is made of 45 steel material (surface blackening treatment), a plug hole 11 for inserting the generator shaft is formed in the side of the socket 10, and the diameter of the plug hole 11 is designed to be 20-50mm (adaptation range) according to the common shaft size.

[0048] A slip ring 12 is arranged to slide in the plug hole 11, the slip ring 12 is made of brass (the gap between the inner diameter of the slip ring 12 and the plug hole 11 is ≤0.03mm), and a reset spring 13 for resetting the slip ring 12 is arranged in the plug hole 11, the reset spring 13 is a cylindrical helical tensile spring, one end of the reset spring 13 is hooked to a hook hole in the inner side of the slip ring 12, and the other end of the reset spring 13 is hooked to the bottom of the plug hole 11.

[0049] The inner ring of the slip ring 12 is fixedly provided with a ring-shaped rubber film 14 by epoxy resin glue, the rubber film 14 is made of butyronitrile rubber, the inner ring diameter of the rubber film 14 is 5mm smaller than the minimum adaptive rotating shaft diameter, and the sleeve clamping effect on rotating shafts with different diameters is ensured.

[0050] One side of the slip ring 12 is fixedly provided with a connecting rod 15 for starting the air pump 8 by an internal hexagonal bolt, the connecting rod 15 is made of stainless steel, one end of the connecting rod 15 is hingedly connected to the slip ring 12, and the other end extends to the travel switch of the air pump 8, when the slip ring 12 slides, the connecting rod 15 can touch the travel switch to start the air pump 8.

[0051] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 , the air-tight column 6 is internally provided with an air hole 16 penetrating the top, and the inner wall is smooth without burrs.

[0052] The air-tight column 6 is fixedly provided with air pipes 17 on both sides, and the air pipes 17 are in communication with the air hole 16.

[0053] The pipe heads of the air pipes 17 extend to the probes of the lever micrometer 9, and the opposite sides of the pipe heads of the two air pipes 17 are provided with embedding holes 18, the embedding holes 18 are slidably provided with magnetic columns 19 for closing the air pipes 17, the magnetic columns 19 are made of neodymium-iron-boron strong magnetic material, and the embedding holes 18 are provided with tension springs 20 for resetting the magnetic columns 19, the tension springs 20 are cylindrical helical tension springs, one end of each of the tension springs 20 is fixed to the bottom of the embedding hole 18, and the other end is fixed to the end of the magnetic column 19.

[0054] When the probe of the lever micrometer 9 deviates from the air pipe 17, the two magnetic columns 19 are attracted to each other to overcome the pulling force of the tension spring 20 to slide and open the air pipe 17 channel, so that the gas in the air-tight column 6 is discharged to realize pressure relief and upward movement, until the probe of the lever micrometer 9 reaches the position of the air pipe 17 and is attached to the generator rotating shaft, the probe is provided with a magnetic shielding sleeve, the magnetic shielding sleeve is made of pure copper, and the metal material of the probe is prevented from interfering with the magnetic force of the magnetic column 19.

[0055] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 , the outer end of the air-tight column 6 is provided with a mounting hole 21 in communication with the air hole 16.

[0056] The lever micrometer 9 is fixed by welding and is provided with a bolt-fixed plug 22, the plug 22 is made of 45 steel, a through hole adapted to the bolt is formed in the middle of the plug 22, when the plug 22 is inserted into the mounting hole 21, the M8 inner hexagonal bolt is threaded into the mounting hole 21 through the through hole, thereby fixing the lever micrometer 9, and a spring washer is arranged between the bolt and the plug 22 to prevent the bolt from loosening and causing the plug 22 to deviate.

[0057] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 , the slide rail 2 is a T-shaped slide rail, and a T-shaped groove adapted to the T-shaped slide rail is formed in the bottom of the mounting seat 3, and a wear-resistant gasket is arranged on the inner side wall of the T-shaped groove, by arranging the slide rail 2 as a T-shaped slide rail and cooperating with the adapted T-shaped groove, the up and down displacement of the mounting seat 3 during sliding can be limited, so as to avoid the mounting seat 3 from being separated from the slide rail 2, and the sliding stability is improved. The wear-resistant gasket on the inner side wall can reduce the direct friction loss between the T-shaped groove and the slide rail 2, prolong the service life of the device, and reduce the noise during sliding.

[0058] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 , an O-shaped sealing ring is arranged between the airtight column 6 and the inner wall of the airtight tube 4, and the O-shaped sealing ring is embedded in the annular groove formed on the outer circumferential surface of the airtight column 6, the O-shaped sealing ring between the airtight column 6 and the airtight tube 4 can enhance the sealing performance of the cooperation between the two, prevent the gas in the airtight tube 4 from leaking from the gap, ensure that the airtight column 6 can be effectively pushed down when the air pump 8 is filled with air, and ensure the working reliability of the airtight driving mechanism. The sealing ring is embedded in the annular groove, which can avoid falling off or displacement during the sliding process of the airtight column 6, and maintain long-term sealing effect.

[0059] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 , a conical surface transition section is arranged on the inner wall of the socket 10 near the opening, and the large-diameter end of the conical surface transition section faces the opening direction of the socket 10, the conical surface transition section at the opening of the socket 10 plays a guiding role, which facilitates the quick and accurate insertion of the generator shaft into the socket 11, reduces the knocking and abrasion between the shaft and the edge of the socket 11, and improves the convenience of detection operation.

[0060] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 ,Figures 5 to 9 Figure 1 Figure 2 Figure 3 Figure 4 Figures 5 to 9 As shown, the outer peripheral side of the plug 22 is provided with an annular clamping groove, the hole wall of the mounting hole 21 is threadedly connected with a locking bolt matched with the annular clamping groove, and the end of the locking bolt extends into the annular clamping groove to form a limit. The end of the locking bolt is embedded in the annular clamping groove of the plug 22, which can form a circumferential and axial double limit for the plug 22, preventing the lever micrometer 9 from loosening or deviating due to vibration or force during detection. Compared with ordinary bolt fixing, this structure can not only ensure firm connection, but also facilitate the disassembly and position adjustment of the lever micrometer 9, improving the maintenance convenience of the device.

[0061] A method for using a generator concentricity detection device, comprising the following steps:

[0062] S1, the generator is placed on the mounting seat 3 and fixed, the rotating shaft is inserted into the insertion hole 11 to pass through the annular rubber film 14, until the rubber film 14 is completely sleeved on the outer periphery of the rotating shaft, then slowly pull out the rotating shaft, during the pulling out process, the rotating shaft drives the rubber film 14 to move outward synchronously, the rubber film 14 pulls the sliding ring 12 to slide outward along the insertion hole 11, the sliding ring 12 stretches the internal reset spring 13, when the sliding ring 12 moves, the connecting rod 15 on one side of the sliding ring 12 moves together, triggering the air pump 8 to start.

[0063] S2, the air pump 8 injects air into the air-tight tube 4, pushes the air-tight column 6 to slide downward along the air-tight tube 4, the outer end lever micrometer 9 moves downward, until the micrometer probe contacts the outer periphery of the generator rotating shaft, during this process, the rubber film 14 has different degrees of sleeve fitting for rotating shafts of different diameters: the larger the diameter of the rotating shaft, the smaller the area of the rubber film 14 sleeved on the rotating shaft, the rubber film 14 is more quickly separated from the rotating shaft when the rotating shaft is pulled out, the sliding ring 12 is quickly reset under the tension of the reset spring 13, the connecting rod 15 is closed after the sliding ring 12 is reset, the air pump 8 is closed, and the air-tight column 6 stops moving downward. The smaller the diameter of the rotating shaft, the larger the area of the rubber film 14 sleeved on the shaft, the slower the sliding ring 12 resets, the longer the air pump 8 works, and the greater the downward movement of the air-tight column 6, finally realizing the automatic adaptation of the downward movement of the lever micrometer 9 and the diameter of the rotating shaft.

[0064] S3, when the lever micrometer 9 probe contacts the rotating shaft, the probe is deflected upward by the rotating shaft, deviating from the position of the pipe head of the air pipe 17 on both sides of the air-tight column 6, at this time, the two magnetic columns 19 in the pipe head embedded hole 18 of the air pipe 17 lose the block of the probe, and are attracted to each other under the action of magnetic force, opening the air pipe 17 channel, the gas in the air-tight tube 4 leaks outward through the air hole 16 and the air pipe 17, the air-tight column 6 slowly moves upward under the elastic force of the bottom spring 7, until the lever micrometer 9 probe falls to the position of the pipe head of the air pipe 17 and stably adheres to the rotating shaft, at this time, the air pipe 17 is blocked by the probe again, the magnetic column 19 is reset to close the air pipe 17 under the action of the tension spring 20, the air-tight column 6 stops moving, realizing the automatic adjustment of the probe along the pressure of the rotating shaft, and at the same time, the lever micrometer 9 completes the automatic zero reset because the probe is in a stable adhering state.

[0065] S4, the air hole 16 inside the air-tight column 6 is communicated with the outer end mounting hole 21, if there is an assembly gap between the plug 22 of the lever micrometer 9 and the mounting hole 21, the high-pressure gas in the air hole 16 will leak from the gap, resulting in the loss of pressure in the air-tight tube 4, the air-tight column 6 moves up under the action of the spring 7, the probe of the lever micrometer 9 is separated from the rotating shaft, at this time, the cooperation state of the plug 22 and the mounting hole 21 needs to be checked, the plug 22 is fastened again through the bolt until there is no leakage in the air hole 16 and the lever micrometer 9 can be stably attached to the rotating shaft, ensuring that the subsequent detection data is accurate, if the plug 22 and the mounting hole 21 are tightly matched without gap, the concentricity detection link can be directly entered.

[0066] 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, 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, various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A generator concentricity detection device, characterized in that, Includes a base (1), on which a slide rail (2) is fixedly mounted, and on which a mounting seat (3) with a self-locking function is slidably mounted; An airtight tube (4) is fixedly installed on the rear side of the base (1). A through groove (5) is opened on the side surface of the airtight tube (4). An L-shaped airtight column (6) is slidably installed in the airtight tube (4) and the through groove (5). A spring (7) is installed at the bottom of the airtight tube (4) to push the airtight column (6) upward. An air pump (8) is fixedly installed at the top of the airtight tube (4) to inject air into it and push the airtight column (6) downward. A lever dial indicator (9) is installed at the outer end of the airtight column (6) to abut against the generator shaft. A socket (10) is fixedly installed on the base (1). A socket (11) for inserting the generator shaft is opened on the side of the socket (10). A slip ring (12) is slidably installed in the socket (11). A reset spring (13) for resetting the slip ring (12) is installed in the socket (11). The inner ring of the slip ring (12) is fixedly provided with an annular adhesive film (14), and a connecting rod (15) for starting the air pump (8) is provided on one side of the slip ring (12). The airtight column (6) has an air hole (16) that extends through the top inside. Air pipes (17) are fixedly installed on both sides of the airtight column (6), and the air pipes (17) are connected to the air hole (16). The tube head of the trachea (17) extends to the probe of the lever micrometer (9). An embedded hole (18) is provided on the opposite side of the tube head of the two tracheas (17). A magnetic column (19) that closes the trachea (17) is slidably arranged in the embedded hole (18). A tension spring (20) that resets the magnetic column (19) is provided in the embedded hole (18). When the probe of the lever micrometer (9) deviates from the air tube (17), the magnetic columns (19) on both sides attract each other to open the air tube (17), causing the airtight column (6) to depressurize and move upward until the probe of the lever micrometer (9) reaches the position of the air tube (17) and fits against the generator shaft.

2. The generator concentricity detection device according to claim 1, characterized in that: The outer end of the airtight column (6) is provided with an installation hole (21) that communicates with the air hole (16), and the lever dial indicator (9) is fixedly provided with a pin (22) that is fixed by bolts.

3. The generator concentricity detection device according to claim 2, characterized in that: The slide rail (2) is a T-shaped slide rail, and the bottom of the mounting base (3) is provided with a T-shaped groove that is adapted to the T-shaped slide rail. The inner side wall of the T-shaped groove is provided with a wear-resistant pad.

4. The generator concentricity detection device according to claim 3, characterized in that: An O-ring is provided between the inner wall of the airtight column (6) and the airtight pipe (4), and the O-ring is embedded in the annular groove opened on the outer circumference of the airtight column (6).

5. The generator concentricity detection device according to claim 4, characterized in that: The inner wall of the socket (11) of the socket (10) is provided with a conical transition section near the opening, and the large diameter end of the conical transition section faces the opening direction of the socket (11).

6. The generator concentricity detection device according to claim 5, characterized in that: The outer peripheral side of the pin (22) is provided with an annular groove, and the wall of the mounting hole (21) is threaded with a locking bolt that is compatible with the annular groove, and the end of the locking bolt extends into the annular groove to form a limit.

7. A method of using a generator concentricity detection device, comprising using the generator concentricity detection device as described in claim 6, characterized in that, Includes the following steps: S1. Place the generator on the mounting base (3) and fix it so that the shaft is aligned with the socket (10) and inserted through the annular diaphragm (14) of the inner ring of the slip ring (12) until the diaphragm (14) completely covers the shaft. Then slowly pull out the shaft. The shaft drives the diaphragm (14) to move outward. The diaphragm (14) pulls the slip ring (12) to slide along the socket (11) and stretches the return spring (13). The connecting rod (15) on one side of the slip ring (12) moves accordingly, triggering the air pump (8) to start. S2. The air pump (8) injects air into the airtight tube (4), pushes the airtight column (6) to slide downward, and drives the lever dial indicator (9) to move down until the dial indicator probe contacts the outer circumference of the rotating shaft. According to the difference in the diameter of the rotating shaft, the area of ​​the film (14) is different: the larger the diameter, the faster the film (14) leaves the rotating shaft, the slip ring (12) quickly resets and closes the air pump (8) through the connecting rod (15); the smaller the diameter, the slower the slip ring (12) resets and the longer the air pump (8) works, so as to realize the automatic adaptation of the probe downward movement amount to the diameter of the rotating shaft. S3. After the probe contacts the rotating shaft, it is pushed upwards and deviates from the head of the trachea (17). The two magnetic pillars (19) in the trachea (17) hole (18) are no longer blocked. Under the magnetic attraction, the trachea (17) channel is opened. The gas in the airtight tube (4) is depressurized through the air hole (16) and the trachea (17). The airtight column (6) moves upward under the action of the spring (7) until the probe falls back to the position of the trachea (17) and stably fits the rotating shaft. The probe blocks the trachea (17) again. The magnetic pillar (19) resets and closes the channel. The airtight column (6) stops moving, completing the automatic adjustment of the probe pressure and the zeroing of the dial indicator. S4. Since the air hole (16) is connected to the mounting hole (21), if there is a gap between the lever dial indicator (9) pin (22) and the mounting hole (21), the air hole (16) will leak air, causing the pressure of the airtight tube (4) to be lost. The airtight column (6) will move upward and cause the probe to detach from the rotating shaft. At this time, the machine needs to be stopped and the pin (22) bolts tightened until there is no leakage and the probe is stably attached to the rotating shaft.

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