A device for detecting surface cracks of a rotor by magnetic field induction

Abstract

The present invention discloses a magnetic field induction type rotor surface crack detection device, belonging to the technical field of crack detection, including a base, a side cover is arranged on one side of the base, and a side frame is fixedly installed on the top surface of the base; in the present invention, through the coordinated setting of a cleaning mechanism and a magnetic field induction crack detection mechanism, through this design, not only can the comprehensive detection of cracks on the outer surface of the rotor be completed, but also the position of the magnetic field induction crack detection mechanism can be automatically adjusted according to different specifications of the rotor, and the distance between the magnetic field detection probe and the outer surface of the measured rotor is determined, ensuring the detection accuracy. At the same time, when the magnetic field induction crack detection mechanism moves, it can drive the cleaning mechanism to move and contact the measured rotor synchronously, and can realize the cleaning of the outer surface of the rotor while performing a full range of detection on the rotor, avoiding the residue of metal impurities and further improving the detection accuracy. The overall device has good practical application effects.

Description

Technical Field

[0001] The present invention belongs to the technical field of crack detection, and particularly relates to a magnetic field induction type rotor surface crack detection device. Background Art

[0002] Crack detection refers to the use of specific techniques and methods to accurately detect and evaluate internal or surface cracks and other defects in materials or workpieces without damaging them. These cracks may exist in a straight or curved form on the surface or inside of an object, posing a potential threat to the integrity and structural safety of the object. When performing crack detection on a product, a crack detection device needs to be applied.

[0003] Chinese Patent Publication No. (CN105510353B) discloses an automatic crack detection device for the T-tail groove of a generator rotor pole, aiming to solve the deficiencies of inconvenient operation, high labor intensity, long detection cycle, and potential safety hazards when the rotor is relatively high in the existing crack detection of the T-tail groove of the pole. The invention includes a base, on which a guide wheel connecting plate and a driving wheel connecting plate are connected. The upper ends of the guide wheel connecting plate and the driving wheel connecting plate are hinged together, and a contact spring is connected between the lower ends of the guide wheel connecting plate and the driving wheel connecting plate. The lower ends of the guide wheel connecting plate and the driving wheel connecting plate are respectively connected with a lower guide roller and a driving roller. A driving mechanism for driving the driving roller to rotate is installed on the base, a detection probe is installed at the upper end of the base, buffer springs are connected to the left and right side walls of the base, and side guide rollers are installed at the outer ends of the buffer springs. Support springs are connected to the front and rear sides of the base near the left and right sides, and upper guide rollers are installed at the outer ends of the support springs. Although the current crack detection devices can achieve crack detection, the comprehensiveness of crack detection on the surface of cylindrical products is insufficient. At the same time, during detection, some metal impurities remaining on the product surface are extremely likely to interfere with the actual monitoring situation, thus easily leading to an increase in the error of the monitoring result and poor actual application effects. Therefore, a magnetic field induction type rotor surface crack detection device is proposed. Summary of the Invention

[0004] The purpose of the present invention is to propose a magnetic field induction type rotor surface crack detection device to solve the problems that although the current crack detection devices can achieve crack detection, the comprehensiveness of crack detection on the surface of cylindrical products is insufficient, and at the same time, during detection, some metal impurities remaining on the product surface are extremely likely to interfere with the actual monitoring situation, thus easily leading to an increase in the error of the monitoring result and poor actual application effects.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A magnetic field induction type rotor surface crack detection device, including a base, a side cover is arranged on one side of the base, a side frame is fixedly installed on the top surface of the base, a telescopic top frame is fixedly installed on the top of the side frame, and a travel groove and a top hole are arranged on the top surface of the base;

[0006] A rotor installation mechanism is arranged on the inner wall of the bottom surface of the base, and the rotor installation mechanism is used for the rapid installation of the rotor. An inner guide rail is fixedly installed on the inner surface of the base, and a cleaning mechanism and a magnetic field induction crack detection mechanism are slidably installed on the inner guide rail. The magnetic field induction crack detection mechanism is used for the all-round crack detection of the outer surface of the rotor, and the cleaning mechanism is used for the synchronous cleaning treatment during the rotor crack detection process.

[0007] By adopting the above technical solutions, a cleaning mechanism and a magnetic field induction crack detection mechanism are provided. Through this design, not only can the comprehensive detection of cracks on the outer surface of the rotor be completed, but also the position of the magnetic field induction crack detection mechanism can be automatically adjusted according to different specifications of the rotor, and the distance between the magnetic field detection probe and the outer surface of the measured rotor is determined to ensure the detection accuracy. At the same time, when the magnetic field induction crack detection mechanism moves, it can synchronously drive the cleaning mechanism to move and contact the measured rotor, so that the outer surface of the rotor can be cleaned while the all-round detection of the rotor is carried out, avoiding the residue of metal impurities and further improving the detection accuracy. The overall equipment has good practical application effects.

[0008] As a further description of the above technical solution:

[0009] The cleaning mechanism includes a first moving seat, and the first moving seat is slidably installed on the inner guide rail through the chutes arranged on the outer walls of its two sides. A first top groove and a rotating hole are arranged on the top surface of the first moving seat, and a first rolling disc is rotatably installed in the rotating hole through a rotating shaft.

[0010] As a further description of the above technical solution:

[0011] A top roller is fixedly installed on the top surface of the first rolling disc, a plurality of cleaning brush strips are arranged on the outer surface of the top roller, and two first air guiding components are rotatably installed on the first top groove.

[0012] As a further description of the above technical solution:

[0013] The magnetic field induction crack detection mechanism includes a second moving seat and a magnetic field detection probe. The second moving seat is slidably installed on the inner guide rail through the chutes arranged on the outer walls of its two sides. A second top groove and a rotating hole are arranged on the top surface of the second moving seat, and a second rolling disc is rotatably installed in the rotating hole through a rotating shaft.

[0014] As a further description of the above technical solution:

[0015] An installation roller is fixedly installed on the top surface of the second rolling disc. A plurality of magnetic field detection probes are arranged on the outer surface of the installation roller. A top magnetic field induction detection cover is rotatably installed on the top surface of the installation roller through a rotating shaft.

[0016] As a further description of the above technical solution:

[0017] An installation rod is fixedly installed on the top surface of the top magnetic field induction detection cover. The top end of the installation rod is fixedly connected to the bottom surface of the telescopic top frame. Two second air guiding components are rotatably installed on the second top groove.

[0018] As a further description of the above technical solution:

[0019] The second air guiding component is of the same specification and size as the first air guiding component. Two bidirectional threaded rods are fixedly installed on the outer wall of one side of the second moving seat. The two bidirectional threaded rods are arranged in parallel. One ends of the two bidirectional threaded rods are threadedly connected to two threaded holes arranged inside the first moving seat.

[0020] As a further description of the above technical solution:

[0021] The second air guiding component includes an air shaft. The air shaft is rotatably installed in a rotating hole arranged on the top surface of the second top groove. An air blade and a meshing gear disc are fixedly installed on the outside of the air shaft. The air blade is located above the meshing gear disc. An internal gear rack is fixedly installed on the inner wall of one side of the base. The meshing gear disc is meshed with the internal gear rack.

[0022] As a further description of the above technical solution:

[0023] The rotor installation mechanism includes a driving motor. The driving motor is fixedly installed on the inner wall of the bottom surface of the base. The top end of the output shaft of the driving motor is fixedly installed with a rotor installation cover. A plurality of side air holes are arranged inside the rotor installation cover. Three rotor positioning components are arranged on the inner surface of the rotor installation cover.

[0024] As a further description of the above technical solution:

[0025] The rotor positioning component includes a sliding shaft. The sliding shaft is fixedly installed on the inner surface of the rotor installation cover. A wheel frame is slidably installed on the outside of the sliding shaft. A positioning pulley is rotatably installed on the inner side of the wheel frame through a rotating shaft. A sleeve spring is sleeved on the outside of the sliding shaft. One end of the sleeve spring is fixedly connected to the outer wall of one side of the wheel frame.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In the present invention, by being equipped with a cleaning mechanism and a magnetic field induction crack detection mechanism, when detecting the surface cracks of the rotor, first install and position the rotor. After installation, energize it. According to the outer contour dimensions of the rotor, control the telescopic top frame to contract. At this time, it can drive the magnetic field induction crack detection mechanism to move sideways synchronously until the second roller disc contacts the outer contour of the rotor. During detection, control the rotor under test to rotate. At this time, the second roller disc that fits the outer contour of the rotor can also rotate synchronously, and the installation roller can rotate synchronously. Multiple magnetic field detection probes on the outer surface of the installation roller can conduct omnidirectional magnetic field monitoring on the outer surface of the rotating rotor. Identify the cracks on the outer surface of the rotor according to the monitored magnetic field anomalies. At the same time, the top magnetic field induction detection cover can detect the cracks on the top surface of the rotating rotor. When the magnetic field induction crack detection mechanism moves, it can drive the bidirectional threaded rod to move sideways synchronously. The bidirectional threaded rod can drive the cleaning mechanism threadedly connected to it to move synchronously and approach the magnetic field induction crack detection mechanism. When the magnetic field induction crack detection mechanism stops moving, the first roller disc of the cleaning mechanism will also contact the outer contour of the rotor. Similarly, when the rotor rotates, it can drive the top roller and multiple cleaning brush strips outside it to rotate synchronously. The multiple cleaning brush strips can achieve a comprehensive cleaning of the outer surface of the rotor during the detection process, avoiding magnetic field monitoring errors caused by the residue of some metal impurities. Through this design, not only can the comprehensive detection of the cracks on the outer surface of the rotor be completed, but also the position of the magnetic field induction crack detection mechanism can be automatically adjusted according to different specifications of the rotor, and the distance between the magnetic field detection probe and the outer surface of the rotor under test is determined, ensuring the detection accuracy. At the same time, when the magnetic field induction crack detection mechanism moves, it can drive the cleaning mechanism to move and contact the rotor under test synchronously, enabling the cleaning of the outer surface of the rotor while conducting an omnidirectional detection of the rotor, avoiding the residue of metal impurities, and further improving the detection accuracy. The overall equipment has a good practical application effect.

[0028] 2. In the present invention, by being equipped with a rotor installation mechanism, when installing the rotor under test, only need to directly install the rotor under test into the rotor installation cover. The positioning pulley will rotate as the rotor is inserted until the bottom of the rotor contacts the bottom surface of the rotor installation cover. The wheel frame and the positioning pulley will move adaptively following the contour change of the outer surface of the rotor. Through this design, the rapid installation of the rotor can be achieved. At the same time, since the rotor installation mechanism has an adaptive distance adjustment function, this rotor installation mechanism can be adapted to the installation of rotors of different specifications, with a wide range of applications. And because the positioning pulleys are vertically arranged, when the rotor rotates horizontally, the multiple positioning pulleys can ensure the stability of the rotor during rotation, ensuring the detection accuracy.

[0029] 3. In the present invention, a first air guiding component and a second air guiding component are provided in a supporting manner on the cleaning mechanism and the magnetic field induction crack detection mechanism. When the cleaning mechanism and the magnetic field induction crack detection mechanism are displaced, the meshing tooth disc can mesh with the internal rack fixedly installed on one inner wall of the base, thereby driving the wind shaft and the wind blades to rotate. The rotating wind blades can generate a certain amount of air volume in the base. These airflows can enter the inner side of the rotor installation cover through a plurality of side air holes provided inside the rotor installation cover, and thus blow towards the rotor to be measured. These air volumes can be used in cooperation with the cleaning brush strips to further improve the cleaning effect of the cleaning brush strips on the outside of the rotor to be measured, and further ensure the detection accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a three-dimensional structural schematic diagram of a magnetic field induction type rotor surface crack detection device.

[0031] Figure 2 is a three-dimensional structural schematic diagram of a magnetic field induction type rotor surface crack detection device after the side cover is disassembled.

[0032] Figure 3 is an exploded three-dimensional structural schematic diagram of a magnetic field induction type rotor surface crack detection device.

[0033] Figure 4 is an exploded three-dimensional structural schematic diagram of a rotor installation mechanism in a magnetic field induction type rotor surface crack detection device.

[0034] Figure 5 is an exploded three-dimensional structural schematic diagram of a cleaning mechanism and a magnetic field induction crack detection mechanism in a magnetic field induction type rotor surface crack detection device.

[0035] Figure 6 is an exploded three-dimensional structural schematic diagram of a magnetic field induction crack detection mechanism in a magnetic field induction type rotor surface crack detection device.

[0036] Figure 7 is an exploded three-dimensional structural schematic diagram of a cleaning mechanism in a magnetic field induction type rotor surface crack detection device.

[0037] Figure 8 is a three-dimensional structural schematic diagram of a second air guiding component in a magnetic field induction type rotor surface crack detection device.

[0038] Figure 9 is a magnetic field induction type rotor surface crack detection device Figure 2 in which the enlarged structural schematic diagram at position A.

[0039] Figure 10 is a three-dimensional structural schematic diagram of a rotor positioning component in a magnetic field induction type rotor surface crack detection device.

[0040] Legend Explanation:

[0041] 1. Telescopic top frame; 2. Side frame; 3. Base; 4. Cleaning mechanism; 41. Top roller; 42. Cleaning brush strip; 43. First rolling disc; 44. First air guiding component; 45. First moving seat; 46. First top groove; 5. Rotor installation mechanism; 51. Rotor positioning component; 511. Positioning pulley; 512. Sliding shaft; 513. Sleeve spring; 514. Wheel frame; 52. Side air holes; 53. Rotor installation cover; 54. Driving motor; 6. Magnetic field induction crack detection mechanism; 61. Installation rod; 62. Top magnetic field induction detection cover; 63. Installation roller; 64. Magnetic field detection probe; 65. Second rolling disc; 66. Second air guiding component; 661. Air shaft; 662. Air blades; 663. Meshing gear disc; 67. Bi-directional threaded rod; 68. Second top groove; 69. Second moving seat; 7. Side cover; 8. Stroke groove; 9. Top hole; 10. Inner guide rail; 11. Inner rack. Specific Embodiment

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0043] Please refer to Figures 1 - 10 , the present invention provides a technical solution: a magnetic field induction type rotor surface crack detection device, including a base 3, a side cover 7 is arranged on one side of the base 3, a side frame 2 is fixedly installed on the top surface of the base 3, a telescopic top frame 1 is fixedly installed on the top of the side frame 2, and a stroke groove 8 and a top hole 9 are arranged on the top surface of the base 3;

[0044] A rotor installation mechanism 5 is arranged on the inner wall of the bottom surface of the base 3, and the rotor installation mechanism 5 is used for the quick installation of the rotor. An inner guide rail 10 is fixedly installed on the inner surface of the base 3, and a cleaning mechanism 4 and a magnetic field induction crack detection mechanism 6 are slidably installed on the inner guide rail 10. The magnetic field induction crack detection mechanism 6 is used for the all-round crack detection of the outer surface of the rotor, and the cleaning mechanism 4 is used for the synchronous cleaning process during the rotor crack detection.

[0045] The cleaning mechanism 4 includes a first moving seat 45. The first moving seat 45 is slidably mounted on the inner guide rail 10 through chutes provided on the outer walls on both sides thereof. A first top groove 46 and a rotating hole are provided on the top surface of the first moving seat 45. A first rolling disc 43 is rotatably mounted in the rotating hole through a rotating shaft. A top roller 41 is fixedly mounted on the top surface of the first rolling disc 43. A plurality of cleaning brush strips 42 are provided on the outer surface of the top roller 41. Two first air guiding assemblies 44 are rotatably mounted on the first top groove 46.

[0046] The magnetic field induction crack detection mechanism 6 includes a second moving seat 69 and a magnetic field detection probe 64. The second moving seat 69 is slidably mounted on the inner guide rail 10 through chutes provided on the outer walls on both sides thereof. A second top groove 68 and a rotating hole are provided on the top surface of the second moving seat 69. A second rolling disc 65 is rotatably mounted in the rotating hole through a rotating shaft. A mounting roller 63 is fixedly mounted on the top surface of the second rolling disc 65. A plurality of magnetic field detection probes 64 are provided on the outer surface of the mounting roller 63. A top magnetic field induction detection cover 62 is rotatably mounted on the top surface of the mounting roller 63 through a rotating shaft.

[0047] The specific implementation method is as follows: When detecting the surface cracks of the rotor, first install and position the rotor. After installation, energize it. According to the outer contour size of the rotor, control the telescopic top frame 1 to contract. At this time, it can drive the magnetic field induction crack detection mechanism 6 to move laterally synchronously until the second rolling disc 65 contacts the outer contour of the rotor. During detection, control the measured rotor to rotate. At this time, the second rolling disc 65 that fits the outer contour of the rotor can also rotate synchronously. The mounting roller 63 can rotate synchronously. A plurality of magnetic field detection probes 64 on the outer surface of the mounting roller 63 can perform all-round magnetic field monitoring on the outer surface of the synchronously rotating rotor. Identify the cracks on the outer surface of the rotor according to the monitored magnetic field anomalies. At the same time, the top magnetic field induction detection cover 62 can detect the cracks on the top surface of the rotating rotor. When the magnetic field induction crack detection mechanism 6 moves, it can drive the bidirectional threaded rod 67 to move laterally synchronously. The bidirectional threaded rod 67 can drive the cleaning mechanism 4 threadedly connected thereto to displace synchronously and approach the magnetic field induction crack detection mechanism 6. When the magnetic field induction crack detection mechanism 6 stops moving, the first rolling disc 43 of the cleaning mechanism 4 will also contact the outer contour of the rotor. Similarly, when the rotor rotates, it can drive the top roller 41 and the plurality of cleaning brush strips 42 outside it to rotate synchronously. The plurality of cleaning brush strips 42 can achieve comprehensive cleaning of the outer surface of the rotor during the detection process, avoiding magnetic field monitoring errors caused by the residue of some metal impurities.

[0048] Through this design, not only can the comprehensive detection of cracks on the outer surface of the rotor be completed, but also the position of the magnetic field induction crack detection mechanism 6 can be automatically adjusted according to the different specifications of the rotor, and the distance between the magnetic field detection probe 64 and the outer surface of the rotor to be measured is determined, ensuring the detection accuracy. At the same time, when the magnetic field induction crack detection mechanism 6 moves, it can drive the cleaning mechanism 4 to move synchronously and contact the rotor to be measured, enabling the cleaning of the outer surface of the rotor while performing a comprehensive detection of the rotor, avoiding the residue of metal impurities, and further improving the detection accuracy. The overall equipment has a good practical application effect.

[0049] An installation rod 61 is fixedly installed on the top surface of the top magnetic field induction detection cover 62. The top end of the installation rod 61 is fixedly connected to the bottom surface of the telescopic top frame 1. Two second air guide components 66 are rotatably installed on the second top groove 68. The second air guide components 66 are of the same specification and size as the first air guide components 44. Two bidirectional threaded rods 67 are fixedly installed on the outer wall of one side of the second moving seat 69. The two bidirectional threaded rods 67 are arranged in parallel. One end of the two bidirectional threaded rods 67 is threadedly connected to two threaded holes arranged inside the first moving seat 45. The second air guide component 66 includes an air shaft 661. The air shaft 661 is rotatably installed in a rotating hole arranged on the top surface of the second top groove 68. An air blade 662 and a meshing gear disc 663 are fixedly installed on the outer part of the air shaft 661. The air blade 662 is located above the meshing gear disc 663. An internal gear rack 11 is fixedly installed on the inner wall of one side of the base 3. The meshing gear disc 663 is meshed with the internal gear rack 11.

[0050] The specific implementation method is as follows: When the cleaning mechanism 4 and the magnetic field induction crack detection mechanism 6 are displaced, the meshing gear disc 663 can mesh with the internal gear rack 11 fixedly installed on the inner wall of one side of the base 3, thereby driving the air shaft 661 and the air blade 662 to rotate. The rotating air blade 662 can generate a certain amount of air volume in the base 3. These airflows can enter the inner side of the rotor installation cover 53 through several side air holes 52 arranged inside the rotor installation cover 53, and thus blow towards the rotor to be measured. These air volumes can be used in cooperation with the cleaning brush strips 42 to further improve the cleaning effect of the cleaning brush strips 42 on the outside of the rotor to be measured, and further ensure the detection accuracy of the equipment.

[0051] The rotor mounting mechanism 5 includes a driving motor 54 which is fixedly mounted on the inner wall of the bottom surface of the base 3. The top end of the output shaft of the driving motor 54 is fixedly mounted with a rotor mounting cover 53. A plurality of side air holes 52 are arranged inside the rotor mounting cover 53. Three rotor positioning components 51 are arranged on the inner surface of the rotor mounting cover 53. The rotor positioning component 51 includes a sliding shaft 512 which is fixedly mounted on the inner surface of the rotor mounting cover 53. A wheel frame 514 is slidably mounted on the outside of the sliding shaft 512. A positioning pulley 511 is rotatably mounted on the inner side of the wheel frame 514 through a rotating shaft. The positioning pulley 511 and the wheel frame 514 have a rotational resistance. A sleeve spring 513 is sleeved on the outside of the sliding shaft 512. One end of the sleeve spring 513 is fixedly connected to the outer wall of one side of the wheel frame 514.

[0052] The specific implementation method is as follows: When installing the rotor to be measured, it is only necessary to directly install the rotor to be measured into the rotor mounting cover 53. The positioning pulley 511 will rotate with the insertion of the rotor until the bottom of the rotor contacts the bottom surface of the rotor mounting cover 53. The wheel frame 514 and the positioning pulley 511 will move adaptively following the contour change of the outer surface of the rotor.

[0053] Through this design, the rapid installation of the rotor can be realized. At the same time, since the rotor mounting mechanism 5 has an adaptive distance adjustment function, the rotor mounting mechanism 5 can be adapted to the installation of rotors of different specifications, with a wide range of applications. And because the positioning pulleys 511 are vertically arranged, when the rotor rotates horizontally, the plurality of positioning pulleys 511 can ensure the stability of the rotor during rotation and guarantee the detection accuracy.

[0054] Working principle: When detecting the surface cracks of the rotor, first position the rotor for installation. At this time, it is only necessary to directly install the rotor to be measured into the rotor mounting cover 53. The positioning pulley 511 will rotate with the insertion of the rotor until the bottom of the rotor contacts the bottom surface of the rotor mounting cover 53. The wheel frame 514 and the positioning pulley 511 will move adaptively following the contour change of the outer surface of the rotor.

[0055] After installation, power it on. According to the outer contour size of the rotor, control the telescopic top frame 1 to contract. At this time, it can drive the magnetic field induction crack detection mechanism 6 to move laterally synchronously until the second roller 65 contacts the outer contour of the rotor. During detection, control the rotor under test to rotate. At this time, the second roller 65 that fits the outer contour of the rotor can also rotate synchronously. The installation roller 63 can rotate synchronously. A plurality of magnetic field detection probes 64 on the outer surface of the installation roller 63 can conduct omnidirectional magnetic field monitoring on the outer surface of the synchronously rotating rotor. Identify cracks on the outer surface of the rotor according to the monitored magnetic field anomalies. At the same time, the top magnetic field induction detection cover 62 can detect cracks on the top surface of the rotating rotor. When the magnetic field induction crack detection mechanism 6 moves, it can drive the bidirectional threaded rod 67 to move laterally synchronously. The bidirectional threaded rod 67 can drive the cleaning mechanism 4 connected to it by threads to move synchronously and approach the magnetic field induction crack detection mechanism 6. When the magnetic field induction crack detection mechanism 6 stops moving, the first roller 43 of the cleaning mechanism 4 will also contact the outer contour of the rotor. Similarly, when the rotor rotates, it can drive the top roller 41 and a plurality of cleaning brush strips 42 outside it to rotate synchronously. The plurality of cleaning brush strips 42 can achieve a comprehensive cleaning of the outer surface of the rotor during the detection process, avoiding magnetic field monitoring errors caused by the residue of some metal impurities;

[0056] When the cleaning mechanism 4 and the magnetic field induction crack detection mechanism 6 move, the meshing tooth disc 663 can mesh with the internal rack 11 fixedly installed on one inner wall of the base 3, thereby driving the wind shaft 661 and the wind blade 662 to rotate. The rotating wind blade 662 can generate a certain amount of air volume in the base 3. These airflows can enter the inner side of the rotor installation cover 53 through a plurality of side air holes 52 provided inside the rotor installation cover 53, and thus blow towards the rotor under test. These air volumes can be used in cooperation with the cleaning brush strips 42 to further improve the cleaning effect of the cleaning brush strips 42 on the outside of the rotor under test.

[0057] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A magnetic field induction type rotor surface crack detection device, comprising a base (3), characterized in that: One side of the base (3) is provided with a side cover (7). A side frame (2) is fixedly installed on the top surface of the base (3). A telescopic top frame (1) is fixedly installed on the top of the side frame (2). A travel groove (8) and a top hole (9) are arranged on the top surface of the base (3). A rotor installation mechanism (5) is arranged on the inner wall of the bottom surface of the base (3). The rotor installation mechanism (5) is used for the quick installation of the rotor. An inner guide rail (10) is fixedly installed on the inner surface of the base (3). A cleaning mechanism (4) and a magnetic field induction crack detection mechanism (6) are slidably installed on the inner guide rail (10). The magnetic field induction crack detection mechanism (6) is used for the omnidirectional crack detection of the outer surface of the rotor. The cleaning mechanism (4) is used for the synchronous cleaning treatment during the rotor crack detection process. The rotor installation mechanism (5) includes a driving motor (54). The driving motor (54) is fixedly installed on the inner wall of the bottom surface of the base (3). The top end of the output shaft of the driving motor (54) is fixedly installed with a rotor installation cover (53). A plurality of side air holes (52) are arranged inside the rotor installation cover (53). Three rotor positioning components (51) are arranged on the inner surface of the rotor installation cover (53). The rotor positioning component (51) includes a sliding shaft (512). The sliding shaft (512) is fixedly installed on the inner surface of the rotor installation cover (53). A wheel frame (514) is slidably installed outside the sliding shaft (512). A positioning pulley (511) is rotatably installed inside the wheel frame (514) through a rotating shaft. The positioning pulley (511) and the wheel frame (514) have a rotational resistance. A sleeve spring (513) is sleeved outside the sliding shaft (512). One end of the sleeve spring (513) is fixedly connected to the outer wall of one side of the wheel frame (514).

2. The magnetic field induction type rotor surface crack detection device according to claim 1, characterized in that The cleaning mechanism (4) includes a first moving seat (45). The first moving seat (45) is slidably installed on the inner guide rail (10) through the sliding grooves arranged on the outer walls of its two sides. A first top groove (46) and a rotating hole are arranged on the top surface of the first moving seat (45). A first rolling disc (43) is rotatably installed in the rotating hole through a rotating shaft.

3. The magnetic field induction type rotor surface crack detection device according to claim 2, characterized in that, A top roller (41) is fixedly installed on the top surface of the first rolling disc (43). A plurality of cleaning brush strips (42) are arranged on the outer surface of the top roller (41). Two first air guiding components (44) are rotatably installed on the first top groove (46).

4. The magnetic field induction type rotor surface crack detection device according to claim 3, characterized in that, The magnetic field induction crack detection mechanism (6) includes a second moving seat (69) and a magnetic field detection probe (64). The second moving seat (69) is slidably installed on the inner guide rail (10) through the sliding grooves arranged on the outer walls of its two sides. A second top groove (68) and a rotating hole are arranged on the top surface of the second moving seat (69). A second rolling disc (65) is rotatably installed in the rotating hole through a rotating shaft.

5. The magnetic field induction type rotor surface crack detection device according to claim 4, characterized in that, An installation roller (63) is fixedly installed on the top surface of the second rolling disc (65). A plurality of magnetic field detection probes (64) are arranged on the outer surface of the installation roller (63). A top magnetic field induction detection cover (62) is rotatably installed on the top surface of the installation roller (63) through a rotating shaft.

6. The magnetic field induction type rotor surface crack detection device according to claim 5, characterized in that, An installation rod (61) is fixedly installed on the top surface of the top magnetic field induction detection cover (62). The top end of the installation rod (61) is fixedly connected to the bottom surface of the telescopic top frame (1). Two second air guiding components (66) are rotatably installed on the second top groove (68).

7. The magnetic field induction type rotor surface crack detection device according to claim 6, characterized in that, The second air guiding components (66) are of the same specification and size as the first air guiding components (44). Two bidirectional threaded rods (67) are fixedly installed on the outer wall of one side of the second moving seat (69). The two bidirectional threaded rods (67) are arranged in parallel. One end of each of the two bidirectional threaded rods (67) is threadedly connected to two threaded holes provided inside the first moving seat (45).

8. A magnetic field induction type rotor surface crack detection device according to claim 7, characterized in that, The second air guiding component (66) includes an air shaft (661). The air shaft (661) is rotatably installed in a rotation hole provided on the top surface of the second top groove (68). An air blade (662) and a meshing gear disc (663) are fixedly installed on the outer part of the air shaft (661). The air blade (662) is located above the meshing gear disc (663). An internal rack (11) is fixedly installed on the inner wall of one side of the base (3). The meshing gear disc (663) is meshed and connected with the internal rack (11).

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