Rotor external diameter measuring instrument

Abstract

The invention discloses a rotor outer diameter measuring instrument, and belongs to the technical field of rotor outer diameter measuring equipment, the rotor outer diameter measuring instrument comprises a workbench, a rotor, an outer diameter measuring mechanism and a coaxiality measuring mechanism, the rotor is connected with an end part outer diameter measuring mechanism, and the end part outer diameter measuring mechanism comprises a mobile measuring support, a fixed measuring support, a clamp and two end part measuring assemblies. The movable measuring support is slidably installed on the workbench, the fixed measuring support is fixedly installed on the workbench, and the two end measuring assemblies are connected with the movable measuring support and the fixed measuring support respectively. The outer diameter measuring mechanism comprises a measuring frame, a second measuring head and a multi-axis moving assembly, the measuring frame is installed on the second measuring head in a sliding mode, the second measuring head is connected with the multi-axis moving assembly, and the multi-axis moving assembly is installed on the workbench; the coaxiality measuring mechanism comprises a third motor, a third screw rod, a synchronous rotating assembly and a measuring assembly. The measuring assembly is installed above the workbench and located between the movable measuring support and the third motor.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor outer diameter measuring equipment, and particularly discloses a rotor outer diameter measuring instrument. Background Art

[0002] In the field of mechanical manufacturing, the rotor is a core component of rotating equipment such as motors, generators, and turbines. The outer diameter dimension accuracy of the rotor directly affects the operating efficiency, vibration noise, and service life of the equipment. Traditional outer diameter measurement methods mainly rely on manual use of contact measuring tools such as micrometers and vernier calipers for point-by-point detection, or comparison and calibration through standard gauge blocks. However, with the improvement of industrial automation level and the wide application of high-precision rotors.

[0003] In addition, with the improvement of the requirements for rotor performance in fields such as new energy vehicles and aerospace, the industry urgently needs a high-precision, high-robustness, and intelligent outer diameter measurement solution to achieve the technological leap from laboratory sampling detection to on-line full inspection.

[0004] The patent with the publication number CN103398690A discloses a motor rotor outer diameter measuring device. The technical solution of this patent is: including a support, a measuring arm is cantilevered on the same side of the support. One end of the measuring arm is elastically connected to the support and the elastic opening and closing direction changes between the included angle and the size between the two measuring arms. The other end of the measuring arm is in a suspended state and the two suspended ends form a clamping portion for clamping the outer diameter of the motor rotor to be measured. A displacement sensor for collecting the displacement between the two is arranged between the arm bodies in the middle sections of the two measuring arms. However, this patent can only measure the outer diameter of a specific part of the rotor, thus unable to ensure the measurement accuracy. Therefore, a motor rotor outer diameter measuring device is invented for this defect. Summary of the Invention

[0005] For the above technical problems, the technical solution adopted by the present invention is: a rotor outer diameter measuring instrument, including a workbench, a rotor, an end outer diameter measuring mechanism, an outer diameter measuring mechanism, and a coaxiality measuring mechanism. The end outer diameter measuring mechanism includes a movable measuring bracket, a fixed measuring bracket, a fixture, and two groups of end measuring components. The movable measuring bracket is slidably installed on the workbench, the fixed measuring bracket is fixedly installed on the workbench, the fixture is fixedly installed on the fixed measuring bracket, the fixture is connected to the rotor, and the two groups of end measuring components are respectively connected to the movable measuring bracket and the fixed measuring bracket; the outer diameter measuring mechanism includes a measuring frame, a second measuring head, and a multi-axis moving component. The measuring frame is slidably installed on the second measuring head, the second measuring head is connected to the multi-axis moving component, and the multi-axis moving component is installed on the workbench.

[0006] The coaxiality measuring mechanism includes a third motor, a third screw rod, a synchronous rotation assembly, and a measuring assembly. The third motor is fixedly installed above the workbench. The output end of the third motor is connected to the synchronous rotation assembly. The synchronous rotation assembly is connected to the third screw rod. The third screw rod is connected to the measuring assembly. The measuring assembly is connected to the rotor. The measuring assembly is installed above the workbench and is located between the moving measuring bracket and the third motor.

[0007] Further, the end measurement includes a first roller and a second roller. Two inclined surfaces are symmetrically arranged on the upper sides of the moving measuring bracket and the fixed measuring bracket. The two inclined surfaces of the moving measuring bracket and the fixed measuring bracket are arranged opposite to each other. The slopes of the two inclined surfaces of the moving measuring bracket and the fixed measuring bracket are equal. A first groove is provided on each of the two inclined surfaces of the moving measuring bracket, and a second groove is provided on each of the two inclined surfaces of the fixed measuring bracket. A first roller is rotatably installed in each first groove, and a second roller is rotatably installed in each second groove. The diameters and thicknesses of the first roller and the second roller are the same. The rotation centers of the first roller and the second roller are respectively located on the inclined surfaces of the moving measuring bracket and the fixed measuring bracket.

[0008] Further, a first rectangular groove is provided below the first roller, and a second rectangular groove is provided below the first roller. A mounting rod is fixedly installed on the inner sides of the first rectangular groove and the second rectangular groove. A measuring electric cylinder is fixedly installed below each mounting rod. The telescopic end of the measuring electric cylinder is slidably connected to the mounting rod. The telescopic end of the measuring electric cylinder is fixedly installed with a first measuring head. The end of the first measuring head away from the measuring electric cylinder is hemispherical. The first measuring head is slidably connected to the mounting rod. In the initial state, the center of the spherical part of the mounting rod coincides with the intersection point of the extension lines of the center lines of the two inclined surfaces of the moving measuring bracket. In the initial state, the center of the spherical part of the mounting rod coincides with the intersection point of the extension lines of the center lines of the two inclined surfaces of the fixed measuring bracket.

[0009] Further, in the initial state, the rotor end is located above the two first rollers and the two second rollers. The ends of the rotor are respectively tangent to the outer surfaces of the two first rollers and the two second rollers. The radii of the first roller and the second roller are both R1. The distance from the rotation centers of the first roller and the second roller to the initial position of the detection head is L1. The center distance between the two rollers is L2. The distance from the first measuring head to the lowest point of the outer surface of the rotor end in the initial state is L3. The radius of the rotor end is x. Calculation modules are provided on the inner sides of the first rectangular groove and the second rectangular groove. A logic operation circuit is provided in the calculation module. The formula of the logic operation circuit is:

[0010]

[0011] An electronic display screen one is fixedly installed on the side of the moving measuring bracket, and an electronic display screen two is fixedly installed on the side of the fixed measuring bracket. The electronic display screen one and the electronic display screen two are respectively electrically connected to a logic operation circuit.

[0012] Further, a sliding track is fixedly installed on the workbench. The inside of the sliding track is hollow. The first motor is fixedly installed inside the sliding track. A first screw rod is fixedly installed at the output end of the first motor. The axial direction of the first screw rod is parallel to the axial direction of the rotor. A second slider is slidably installed on the inner wall of the sliding track. A moving frame is fixedly installed on the second slider. A threaded hole is provided through the side of the second slider. The second slider forms a screw fit with the first screw rod through the threaded hole. The inside of the moving frame is hollow. The central line direction inside the moving frame is perpendicular to the axial direction of the rotor. A second motor is fixedly installed inside the moving frame. The second motor is located above the first motor. A second screw rod is fixedly installed at the output end of the second motor. The axial direction of the second screw rod is parallel to the central line direction inside the moving frame. A third slider is slidably installed on the inner wall of the moving frame. The measuring frame is fixedly installed on the end face of the third slider away from the first motor. A threaded hole is provided through the side of the third slider. The third slider forms a screw fit with the second screw rod through the threaded hole. A first synchronous belt is installed inside the moving frame. One end of the first synchronous belt is connected to the third slider, and the other end of the first synchronous belt is installed inside the moving frame.

[0013] Further, a cylinder is fixedly installed inside the measuring frame. The axial direction of the telescopic end of the cylinder is perpendicular to the axial direction of the rotor. The telescopic end of the cylinder is fixedly connected to the second measuring head. The axial direction of the second measuring head coincides with the axial direction of the telescopic end of the cylinder. A second synchronous belt is fixedly installed inside the measuring frame. One end of the second synchronous belt is installed on the second measuring head, and the other end of the second synchronous belt is installed inside the measuring frame.

[0014] Further, a pressure sensor is provided at one end of the second measuring head away from the measuring frame. The pressure sensor is electrically connected to the cylinder and the second motor respectively. The axial direction of the telescopic end of the cylinder, the axial direction of the first screw rod, and the axial direction of the second screw rod are perpendicular to each other.

[0015] Further, a fixed frame is also fixedly installed on the upper side of the workbench. The third motor is fixedly installed on the side of the fixed frame away from the fixed measuring bracket. The output end of the third motor is rotationally connected to the fixed frame. The synchronous rotation assembly includes a first gear. The first gear is fixedly installed at the output end of the third motor. The first gear is rotatably installed on the side of the fixed frame facing the moving measuring bracket. A second gear is also rotatably installed on the side of the fixed frame facing the moving measuring bracket. The first gear meshes with the second gear. The number of teeth of the first gear and the second gear is equal. A third screw rod is fixedly installed on the second gear. The axial direction of the third screw rod is parallel to the axial direction of the rotor. The third screw rod is located below the rotor. A moving plate is slidably installed on the workbench. A threaded hole is provided through the side of the moving plate. The moving plate forms a screw fit with the third screw rod through the threaded hole. The moving plate is slidably connected to the outer surface of the rotor.

[0016] Further, a fourth motor is fixedly installed on the side of the moving plate facing the fixed frame. The output end of the fourth motor is rotatably connected to the moving plate. A fourth gear is fixedly installed at the output end of the fourth motor. The fourth gear is rotatably connected to the moving plate. The fourth gear is installed on the side of the moving plate facing the moving measurement bracket. A third gear is also rotatably installed on the side of the moving plate facing the moving measurement bracket. The third gear is rotatably connected to the outer surface of the rotor. The fourth gear meshes with the third gear. The number of teeth of the fourth gear is less than that of the third gear, and the number of teeth of the third gear is an integer multiple of that of the fourth gear. The rotation direction of the output end of the fourth motor is the same as that of the output end of the third motor. The rotational speed of the fourth motor is greater than that of the third motor, and the rotational speed of the fourth motor is an integer multiple of that of the third motor. The ratio of the rotational speed of the fourth motor to that of the third motor is greater than the ratio of the number of teeth of the third gear to that of the fourth gear.

[0017] Further, the measuring assembly includes a fourth measuring head. The fourth measuring head is fixedly installed on the side of the third gear facing the moving measurement bracket. A sensor is fixedly installed on the fourth measuring head. A coaxiality measuring instrument is fixedly installed on the moving plate. The coaxiality measuring instrument is electrically connected to the fourth measuring head.

[0018] The beneficial effects of the present invention compared with the prior art are as follows: (1) The present invention realizes the detection of the outer diameter of each part of the outer surface of the rotor, thereby improving the detection accuracy; (2) The present invention realizes the simultaneous detection of the outer diameter and coaxiality of the outer surface of the rotor, thereby improving the working efficiency; (3) The present invention realizes the simultaneous measurement of the outer diameter of the end of the rotor and the outer diameter of the outer surface, thereby improving the working efficiency. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the end outer diameter measuring mechanism of the present invention.

[0021] Figure 3 It is Figure 2 The partial enlarged structure schematic diagram at position A in

[0022] Figure 4 It is a schematic diagram of the structure of the outer diameter measuring mechanism of the present invention.

[0023] Figure 5 It is Figure 4 The partial enlarged structure schematic diagram at position B in

[0024] Figure 6 It is Figure 4 The partial enlarged structure schematic diagram at position C in

[0025] Figure 7 It is Figure 4 The partial enlarged structure schematic diagram at position D in

[0026] Figure 8 This is a schematic diagram of the coaxiality measurement mechanism structure of the present invention.

[0027] Figure 9 is Figure 8 a partially enlarged structure schematic diagram at position E in

[0028] Figure 10 This is a schematic diagram of the connection relationship between the mobile measurement bracket and the first roller of the present invention.

[0029] Figure 11 This is a schematic diagram of each dimension in the calculation formula of the logic operation circuit of the present invention.

[0030] Reference numerals: 1 - workbench; 2 - rotor; 3 - end outer diameter measurement mechanism; 4 - outer diameter measurement mechanism; 5 - coaxiality measurement mechanism; 301 - mobile measurement bracket; 302 - first roller; 303 - fixed measurement bracket; 304 - fixing bracket; 305 - slide rail; 306 - first slider; 307 - fixture; 308 - second roller; 309 - mounting rod; 310 - measuring electric cylinder; 311 - first measuring head; 401 - first motor; 402 - first screw; 403 - second slider; 404 - moving frame; 405 - sliding track; 406 - measuring frame; 407 - third slider; 408 - second motor; 409 - second screw; 410 - second measuring head; 501 - third motor; 502 - second motor bracket; 503 - first gear; 504 - second gear; 505 - third screw; 506 - fourth motor; 507 - moving plate; 508 - third gear; 509 - fourth gear; 510 - fourth measuring head. Detailed implementation manners

[0031] The technical solution of the present invention will be further described below in conjunction with and through specific implementation manners.

[0032] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0033] Such as in Figure 1 in Figure 2 in Figure 5 ~in Figure 8As shown in the figure, the end outer diameter measuring mechanism 3 includes a movable measuring bracket 301, a fixed measuring bracket 303, a fixture 307, two first rollers 302 and two second rollers 308. The movable measuring bracket 301 is slidably mounted on the workbench 1, the fixed measuring bracket 303 is fixedly mounted on the workbench 1, the fixture 307 is fixedly mounted on the fixed measuring bracket 303, and the fixture 307 is connected to the rotor 2. Two inclined surfaces are symmetrically arranged on the upper sides of the movable measuring bracket 301 and the fixed measuring bracket 303. The two inclined surfaces of the movable measuring bracket 301 and the fixed measuring bracket 303 are arranged opposite to each other, and the slopes of the two inclined surfaces of the movable measuring bracket 301 and the fixed measuring bracket 303 are equal. A first groove is arranged on each of the two inclined surfaces of the movable measuring bracket 301, and a second groove is arranged on each of the two inclined surfaces of the fixed measuring bracket 303. A first roller 302 is rotatably mounted in each first groove, and a second roller 308 is rotatably mounted in each second groove. The diameters and thicknesses of the first roller 302 and the second roller 308 are the same. The rotation centers of the first roller 302 and the second roller 308 are respectively located on the inclined surfaces of the movable measuring bracket 301 and the fixed measuring bracket 303. A slide rail 305 is fixedly mounted on the workbench 1, and a first slider 306 is fixedly mounted on the lower side of the movable measuring bracket 301. The first slider 306 is slidably mounted on the slide rail 305. Before starting work, the end of the rotor 2 to be measured is placed on the second roller 308 and the first roller 302, and the rotor 2 is connected to the third motor 501 through the fixture 307, so as to complete the support of the rotor 2.

[0034] As attached Figure 5 ~ attached Figure 11As shown in the figure, a first rectangular groove is provided below the first roller 302, and a second rectangular groove is provided below the first roller 302. A first distance measuring instrument is fixedly installed on the inner sides of both the first rectangular groove and the second rectangular groove. An installation rod 309 is fixedly installed on the inner sides of both the first rectangular groove and the second rectangular groove. A measuring electric cylinder 310 is fixedly installed below each installation rod 309. The telescopic end of the measuring electric cylinder 310 is slidably connected to the installation rod 309. The telescopic end of the measuring electric cylinder 310 is fixedly installed with a first measuring head 311. One end of the first measuring head 311 away from the measuring electric cylinder 310 is hemispherical. A contact sensor is installed at the hemispherical end of the first measuring head 311. The contact sensor is electrically connected to the measuring electric cylinder 310. The length of the extension of the first measuring head 311 is measured by the first distance measuring instrument. The first measuring head 311 is slidably connected to the installation rod 309. In the initial state, the center of the spherical part of the installation rod 309 coincides with the intersection point of the extension lines of the center lines of the two inclined surfaces of the moving measuring bracket 301. In the initial state, the center of the spherical part of the installation rod 309 coincides with the intersection point of the extension lines of the center lines of the two inclined surfaces of the fixed measuring bracket 303. In the initial state, the end of the rotor 2 is located above the two first rollers 302 and the two second rollers 308. The ends of the rotor 2 are respectively tangent to the outer surfaces of the two first rollers 302 and the two second rollers 308. The radii of both the first roller 302 and the second roller 308 are R1. The distance from the rotation center of the first roller 302 and the second roller 308 to the initial position of the detection head is L1. The center distance between the two rollers is L2. The distance from the first measuring head 311 to the lowest point on the outer surface of the end of the rotor 2 in the initial state is L3. The radius of the end of the rotor is x. Calculation modules are provided on the inner sides of both the first rectangular groove and the second rectangular groove. A logic operation circuit is provided in the calculation module. The formula of the logic operation circuit is:

[0035]

[0036] An electronic display screen one is fixedly installed on the side of the moving measuring bracket 301, and an electronic display screen two is fixedly installed on the side of the fixed measuring bracket 303. The electronic display screen one and the electronic display screen two are respectively electrically connected to a logic operation circuit. The first distance measuring instrument is electrically connected to the logic operation circuit. The measuring electric cylinder 310 is started. The measuring electric cylinder 310 drives the first measuring head 311 to move. When the contact sensor on the first measuring head 311 contacts the lowest point on the outer surface of the end of the rotor 2, the measuring electric cylinder 310 stops working. At this time, the distance between the first measuring head 311 and the initial state is measured by the first distance measuring instrument. Then the measurement result of the first distance measuring instrument is transmitted to the logic operation circuit. The outer surface radius of the end of the rotor 2 is calculated by the logic operation circuit and displayed through the electronic display screen one and the electronic display screen two.

[0037] As attached Figure 2 ~Attached Figure 8As shown, the outer diameter measuring mechanism 4 includes a first motor 401, a measuring frame 406, and a second measuring head 410. The measuring frame 406 is slidably mounted on the second measuring head 410. The first motor 401 is fixedly mounted on the workbench 1. A first screw rod 402 is fixedly mounted at the output end of the first motor 401. The axis direction of the first screw rod 402 is parallel to the axis direction of the rotor 2. A moving frame 404 is slidably mounted on the workbench 1. A through threaded hole is provided on the side surface of the moving frame 404. The moving frame 404 is in a screw fit with the first screw rod 402 through the threaded hole. The inside of the moving frame 404 is hollow. The axis direction of the inside of the moving frame 404 is perpendicular to the axis direction of the rotor 2. A second motor 408 is fixedly mounted inside the moving frame 404. The second motor 408 is located above the first motor 401. A second screw rod 409 is fixedly mounted at the output end of the second motor 408. The axis direction of the second screw rod 409 is parallel to the axis direction of the center line inside the moving frame 404. A third slider 407 is slidably mounted on the inner wall of the moving frame 404. The measuring frame 406 is fixedly mounted on the end face of the third slider 407 away from the first motor 401. A through threaded hole is provided on the side surface of the third slider 407. The third slider 407 is in a screw fit with the second screw rod 409 through the threaded hole. A first synchronous belt is installed inside the moving frame 404. One end of the first synchronous belt is connected to the third slider 407, and the other end of the first synchronous belt is installed inside the moving frame 404. A cylinder is fixedly mounted inside the measuring frame 406. The axis direction of the telescopic end of the cylinder is perpendicular to the axis direction of the rotor 2. The telescopic end of the cylinder is fixedly connected to the second measuring head 410. The axis direction of the second measuring head 410 coincides with the axis direction of the telescopic end of the cylinder. A second synchronous belt is fixedly mounted inside the measuring frame 406. One end of the second synchronous belt is installed on the second measuring head 410, and the other end of the second synchronous belt is installed inside the measuring frame 406.A pressure sensor is provided at one end of the second measuring head 410 away from the measuring frame 406. The pressure sensor is electrically connected to the air cylinder and the second motor 408 respectively. The axial direction of the telescopic end of the air cylinder, the axial direction of the first screw rod 402 and the axial direction of the second screw rod 409 are perpendicular to each other. A second distance measuring instrument is fixedly installed inside the measuring frame 406. An optoelectronic sensor is fixedly installed on the outside of the measuring frame 406 facing the rotor 2 side. The optoelectronic sensor is electrically connected to the air cylinder and the second motor 408. When the second motor 408 starts, it drives the second screw rod 409 to rotate. The second screw rod 409 drives the measuring frame 406 to rise through the third slider 407. When the optoelectronic sensor on the side of the measuring frame 406 detects the lowest point of the outer surface of the rotor 2, the second motor 408 stops working. Then the air cylinder starts, and the air cylinder drives the second measuring head 410 to extend. When the contact sensor of the second measuring head 410 touches the outer surface of the rotor 2, the air cylinder drives the second measuring head 410 to retract. The rising speed of the measuring frame 406 is controlled to be the same as the retracting speed of the second measuring head 410 by the air cylinder through the second motor 408. When the contact sensor of the second measuring head 410 disengages from the outer surface of the rotor 2, the air cylinder stops moving. At this time, the length of the retraction of the telescopic end of the air cylinder is measured by the second distance measuring instrument, so as to measure the radius of the outer surface of the rotor 2. The second motor 408 rotates in the reverse direction, and the air cylinder moves in the reverse direction to bring the second measuring head 410 and the measuring frame 406 back to the original position. Then the first motor 401 starts, and the first motor 401 drives the first screw rod 402 to rotate. The first screw rod 402 drives the moving frame 404 to move through the second slider 403, so as to measure the outer diameters of multiple points on the outer surface of the rotor 2, thereby improving the measurement accuracy.;

[0038] As shown in the appendix Figure 3 ~ appendix Figure 9As shown, the coaxiality measuring mechanism 5 includes a third motor 501, a first gear 503, a third screw rod 505, and a fourth measuring head 510. The third motor 501 is fixedly installed above the workbench 1; a fixed frame 304 is also fixedly installed on the upper side of the workbench 1. A second motor bracket 502 is fixedly installed on the side of the fixed frame 304 away from the fixed measuring bracket 303. The output end of the third motor 501 is fixedly connected to the fixture 307. The third motor 501 is fixedly installed on the second motor bracket 502, and the output end of the third motor 501 is rotatably connected to the fixed frame 304. The first gear 503 is fixedly installed on the output end of the third motor 501. The first gear 503 is rotatably installed on the side of the fixed frame 304 facing the moving measuring bracket 301. A second gear 504 is also rotatably installed on the side of the fixed frame 304 facing the moving measuring bracket 301. The first gear 503 meshes with the second gear 504. The number of teeth of the first gear 503 and the second gear 504 is equal. A third screw rod 505 is fixedly installed on the second gear 504. The axial direction of the third screw rod 505 is parallel to the axial direction of the rotor 2. The third screw rod 505 is located below the rotor 2. A moving plate 507 is slidably installed on the workbench 1. A threaded hole is provided through the side of the moving plate 507. The moving plate 507 forms a screw fit with the third screw rod 505 through the threaded hole. The moving plate 507 is slidably connected to the outer surface of the rotor 2; a fourth motor 506 is fixedly installed on the side of the moving plate 507 facing the fixed frame 304. The output end of the fourth motor 506 is rotatably connected to the moving plate 507. A fourth gear 509 is fixedly installed on the output end of the fourth motor 506. The fourth gear 509 is rotatably connected to the moving plate 507. The fourth gear 509 is installed on the side of the moving plate 507 facing the moving measuring bracket 301. A third gear 508 is also rotatably installed on the side of the moving plate 507 facing the moving measuring bracket 301. The third gear 508 is rotatably connected to the outer surface of the rotor 2. The fourth gear 509 meshes with the third gear 508. The number of teeth of the fourth gear 509 is less than the number of teeth of the third gear 508. The number of teeth of the third gear 508 is an integer multiple of the number of teeth of the fourth gear 509. The rotation direction of the output end of the fourth motor 506 is the same as the rotation direction of the output end of the third motor 501;The fourth measuring head 510 is fixedly installed on the side of the third gear 508 facing the moving measuring bracket 301. A sensor is fixedly installed on the fourth measuring head 510. A coaxiality measuring instrument is fixedly installed on the moving plate 507. The coaxiality measuring instrument is electrically connected to the fourth measuring head 510. A first slider 306 is fixedly installed on the lower side of the moving plate 507. The first slider 306 on the lower side of the moving plate 507 is slidably connected to the slide rail 305. The rotational speed of the fourth motor 506 is greater than that of the third motor 501. The rotational speed of the fourth motor 506 is an integer multiple of the rotational speed of the third motor 501. The ratio of the rotational speed of the fourth motor 506 to the rotational speed of the third motor 501 is greater than the ratio of the number of teeth of the third gear 508 to the fourth gear 509. When the third motor 501 and the fourth motor 506 are started, when the third motor 501 rotates, it drives the rotor 2 to rotate through the fixture 307. At the same time, it drives the second gear 504 to rotate through the first gear 503. The second gear 504 rotates through the third screw rod 505, thereby driving the moving plate 507 to slide along the slide rail 305. At the same time, the fourth motor 506 drives the third gear 508 to rotate through the fourth gear 509, and then the coaxiality of the outer surface of the rotor 2 is detected by the fourth measuring head 510 on the third gear 508.;

[0039] The working principle of the present invention is as follows.

[0040] (1) Before starting work, the end of the rotor 2 to be measured is placed on the second roller 308 and the first roller 302, and the rotor 2 is connected to the third motor 501 through the fixture 307, thereby completing the support of the rotor 2. Then the measuring electric cylinder 310 is started, and the measuring electric cylinder 310 drives the first measuring head 311 to move. When the contact sensor on the first measuring head 311 touches the lowest point of the outer surface of the end of the rotor 2, the measuring electric cylinder 310 stops working. At this time, the distance between the first measuring head 311 and the initial state is measured by the distance measuring instrument I. Then the result measured by the distance measuring instrument I is transmitted to the logic operation circuit, and the outer surface radius of the end of the rotor 2 is calculated through the logic operation circuit and displayed on the first electronic display screen and the second electronic display screen.

[0041] (2) The second motor 408 starts to drive the second screw rod 409 to rotate. The second screw rod 409 drives the measuring frame 406 to rise through the third slider 407. When the photoelectric sensor on the side of the measuring frame 406 detects the lowest point on the outer surface of the rotor 2, the second motor 408 stops working. Then the air cylinder starts, and the air cylinder drives the second measuring head 410 to extend. When the contact sensor of the second measuring head 410 touches the outer surface of the rotor 2, the air cylinder drives the second measuring head 410 to retract. The rising speed of the measuring frame 406 is controlled to be the same as the retracting speed of the second measuring head 410 by the air cylinder through the second motor 408. When the contact sensor of the second measuring head 410 separates from the outer surface of the rotor 2, the air cylinder stops moving. At this time, the length of the retraction of the telescopic end of the air cylinder is measured by the second distance measuring instrument, so as to measure the radius of the outer surface of the rotor 2. The second motor 408 rotates in the reverse direction, and the air cylinder moves in the reverse direction to bring the second measuring head 410 and the measuring frame 406 back to the original position. Then the first motor 401 starts, and the first motor 401 drives the first screw rod 402 to rotate. The first screw rod 402 drives the moving frame 404 to move through the second slider 403, so as to measure the outer diameters of multiple points on the outer surface of the rotor 2, thereby improving the measurement accuracy.

[0042] (3) The third motor 501 and the fourth motor 506 start. When the third motor 501 rotates, it drives the rotor 2 to rotate through the fixture 307. At the same time, it drives the second gear 504 to rotate through the first gear 503. The second gear 504 rotates through the third screw rod 505, and then drives the moving plate 507 to slide along the slide rail 305. At the same time, the fourth motor 506 drives the third gear 508 to rotate through the fourth gear 509, and then detects the coaxiality of the outer surface of the rotor 2 through the fourth measuring head 510 on the third gear 508.

[0043] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A rotor outer diameter measuring instrument, comprising a workbench (1) and a rotor (2), characterized in that: The rotor outer diameter measuring instrument further comprises an end outer diameter measuring mechanism (3), an outer diameter measuring mechanism (4) and a coaxiality measuring mechanism (5); the end outer diameter measuring mechanism (3) comprises a movable measuring bracket (301), a fixed measuring bracket (303), a fixture (307) and two groups of end measuring components; the movable measuring bracket (301) is slidably mounted on the workbench (1); the fixed measuring bracket (303) is fixedly mounted on the workbench (1); the fixture (307) is fixedly mounted on the fixed measuring bracket (303); the fixture (307) is connected to the rotor (2); and the two groups of end measuring components are respectively connected to the movable measuring bracket (301) and the fixed measuring bracket (303); the outer diameter measuring mechanism (4) comprises a measuring frame (406), a second measuring head (410) and a multi-axis moving component; the measuring frame (406) is slidably mounted on the second measuring head (410); the second measuring head (410) is connected to the multi-axis moving component; and the multi-axis moving component is mounted on the workbench (1); The coaxiality measuring mechanism (5) comprises a third motor (501), a third screw rod (505), a synchronous rotation assembly and a measuring assembly. The third motor (501) is fixedly mounted above the workbench (1). The output end of the third motor (501) is connected to the synchronous rotation assembly. The synchronous rotation assembly is connected to the third screw rod (505). The third screw rod (505) is connected to the measuring assembly. The measuring assembly is connected to the rotor (2). The measuring assembly is mounted above the workbench (1) and is located between the movable measuring bracket (301) and the third motor (501).

2. A rotor outer diameter measuring instrument according to claim 1, characterized in that: The end measurement comprises a first roller (302) and a second roller (308); the upper side surfaces of the mobile measurement bracket (301) and the fixed measurement bracket (303) are symmetrically provided with two inclined surfaces; the two inclined surfaces of the mobile measurement bracket (301) and the fixed measurement bracket (303) are arranged opposite to each other; the two inclined surfaces of the mobile measurement bracket (301) and the fixed measurement bracket (303) have the same inclination; the two inclined surfaces of the mobile measurement bracket (301) are each provided with a groove 1; the two inclined surfaces of the fixed measurement bracket (303) are each provided with a groove 2; a first roller (302) is rotatably mounted in each groove 1; a second roller (308) is rotatably mounted in each groove 2; the diameter and thickness of the first roller (302) and the second roller (308) are consistent; and the rotation centers of the first roller (302) and the second roller (308) are respectively located on the inclined surfaces of the mobile measurement bracket (301) and the fixed measurement bracket (303).

3. A rotor outer diameter measuring instrument according to claim 2, characterized in that: A rectangular groove 1 is provided below the first roller (302), and a rectangular groove 2 is provided below the first roller (302). A mounting rod (309) is fixedly installed inside the rectangular groove 1 and the rectangular groove 2. A measuring electric cylinder (310) is fixedly installed below each mounting rod (309). The telescopic end of the measuring electric cylinder (310) is slidably connected to the mounting rod (309). A first measuring head (311) is fixedly installed at the telescopic end of the measuring electric cylinder (310). The end of the first measuring head (311) away from the measuring electric cylinder (310) is hemispherical. The first measuring head (311) is slidably connected to the mounting rod (309). In an initial state, the center of the spherical part of the mounting rod (309) coincides with the intersection of the extended center lines of the two inclined surfaces of the movable measuring bracket (301). In an initial state, the center of the spherical part of the mounting rod (309) coincides with the intersection of the extended center lines of the two inclined surfaces of the fixed measuring bracket (303).

4. A rotor outer diameter measuring instrument according to claim 3, characterized in that: In an initial state, the end of the rotor (2) is located above the two first rollers (302) and the two second rollers (308), the end of the rotor (2) is tangent to the outer surfaces of the two first rollers (302) and the two second rollers (308), the radius of the first roller (302) and the second roller (308) are both R1, the distance from the rotation center of the first roller (302) and the second roller (308) to the initial position of the detection head is L1, the distance between the two roller centers is L2, the distance between the first measuring head (311) and the lowest point of the outer surface of the end of the rotor (2) in the initial state is L3, the radius of the rotor end is x, and a calculation module is arranged inside the rectangular slot 1 and the rectangular slot 2, and a logic operation circuit is arranged inside the calculation module, and the formula of the logic operation circuit is: A first electronic display screen is fixedly mounted on the side of the mobile measuring bracket (301), and a second electronic display screen is fixedly mounted on the side of the fixed measuring bracket (303). The first electronic display screen and the second electronic display screen are electrically connected to a logic operation circuit respectively.

5. A rotor outer diameter measuring instrument according to claim 2, characterized in that: A sliding track (405) is fixedly installed on the workbench (1), and the interior of the sliding track (405) is hollow. The first motor (401) is fixedly installed inside the sliding track (405), and a first screw rod (402) is fixedly installed on the output end of the first motor (401). The axial direction of the first screw rod (402) is parallel to the axial direction of the rotor (2). A second slider (403) is slidably installed on the inner wall of the sliding track (405), and a moving frame (404) is fixedly installed on the second slider (403). A threaded hole is provided on the side of the second slider (403), and the second slider (403) is screw-fitted with the first screw rod (402) through the threaded hole. The interior of the moving frame (404) is hollow, and the center line direction of the interior of the moving frame (404) is perpendicular to the axial direction of the rotor (2). The interior of the moving frame (404) A second motor (408) is fixedly installed, the second motor (408) is located above the first motor (401), a second screw (409) is fixedly installed at the output end of the second motor (408), the axis direction of the second screw (409) is parallel to the center line direction of the inside of the moving frame (404), a third slider (407) is slidably installed on the inner wall of the moving frame (404), the measuring frame (406) is fixedly installed on the end surface of the third slider (407) away from the first motor (401), a threaded hole is provided on the side of the third slider (407), the third slider (407) and the second screw (409) form a spiral fit through the spiral hole, a synchronous belt 1 is installed inside the moving frame (404), one end of the synchronous belt 1 is connected to the third slider (407), and the other end of the synchronous belt 1 is installed inside the moving frame (404).

6. A rotor outer diameter measuring instrument according to claim 5, characterized in that: A cylinder is fixedly installed inside the measuring frame (406), the axis direction of the cylinder telescopic end is perpendicular to the axis direction of the rotor (2), the cylinder telescopic end is fixedly connected to the second measuring head (410), the axis direction of the second measuring head (410) coincides with the axis direction of the cylinder telescopic end, and a second synchronous belt is fixedly installed inside the measuring frame (406), one end of the second synchronous belt is installed on the second measuring head (410), and the other end of the second synchronous belt is installed inside the measuring frame (406).

7. A rotor outer diameter measuring instrument according to claim 6, characterized in that: A pressure sensor is provided at one end of the second measuring head (410) away from the measuring frame (406), and the pressure sensor is electrically connected to the cylinder and the second motor (408) respectively. The axial direction of the telescopic end of the cylinder, the axial direction of the first screw (402) and the axial direction of the second screw (409) are perpendicular to each other.

8. A rotor outer diameter measuring instrument according to claim 3, characterized in that: A fixed frame (304) is also fixedly mounted on the upper side of the workbench (1); a third motor (501) is fixedly mounted on a side of the fixed frame (304) away from the fixed measuring bracket (303); an output end of the third motor (501) is rotatably connected to the fixed frame (304); a synchronous rotation component comprises a first gear (503); the first gear (503) is fixedly mounted on the output end of the third motor (501); the first gear (503) is rotatably mounted on a side of the fixed frame (304) facing the movable measuring bracket (301); a second gear (504) is also rotatably mounted on a side of the fixed frame (304) facing the movable measuring bracket (301); The first gear (503) is meshed with the second gear (504); the first gear (503) and the second gear (504) have the same number of teeth; a third screw rod (505) is fixedly mounted on the second gear (504); the axial direction of the third screw rod (505) is parallel to the axial direction of the rotor (2); the third screw rod (505) is located below the rotor (2); a movable plate (507) is slidably mounted on the workbench (1); a threaded hole is provided on the side of the movable plate (507); the movable plate (507) and the third screw rod (505) are screw-fitted via the threaded hole; the movable plate (507) is slidably connected to the outer surface of the rotor (2).

9. A rotor outer diameter measuring instrument according to claim 8, characterized in that: A fourth motor (506) is fixedly mounted on the side of the moving plate (507) facing the fixed frame (304); an output end of the fourth motor (506) is rotatably connected to the moving plate (507); a fourth gear (509) is fixedly mounted on the output end of the fourth motor (506); the fourth gear (509) is rotatably connected to the moving plate (507); the fourth gear (509) is mounted on a side of the moving plate (507) facing the moving measuring bracket (301); a third gear (508) is rotatably mounted on a side of the moving plate (507) facing the moving measuring bracket (301); the third gear (508) is rotatably connected to the outer surface of the rotor (2); The fourth gear (509) is meshed with the third gear (508); the number of teeth of the fourth gear (509) is less than the number of teeth of the third gear (508); the number of teeth of the third gear (508) is an integer multiple of the fourth gear (509); the rotation direction of the output end of the fourth motor (506) is the same as the rotation direction of the output end of the third motor (501); the rotation speed of the fourth motor (506) is greater than the rotation speed of the third motor (501); the rotation speed of the fourth motor (506) is an integer multiple of the rotation speed of the third motor (501); and the ratio of the rotation speeds of the fourth motor (506) to the third motor (501) is greater than the ratio of the number of teeth of the third gear (508) to the fourth gear (509).

10. A rotor outer diameter measuring instrument according to claim 9, characterized in that: The measuring assembly comprises a fourth measuring head (510), the fourth measuring head (510) being fixedly mounted on the side of the third gear (508) facing the movable measuring bracket (301), a sensor being fixedly mounted on the fourth measuring head (510), a coaxiality measuring instrument being fixedly mounted on the movable plate (507), and the coaxiality measuring instrument being electrically connected to the fourth measuring head (510).

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