A motor rotor flaw detection device

Abstract

This invention belongs to the technical field of rotor testing equipment, and specifically relates to a motor rotor defect detection device, comprising an L-shaped base, an L-shaped top plate fixedly connected to the upper surface of the horizontal portion of the L-shaped base, a through hole in the horizontal portion of the L-shaped top plate, and a first electric push rod fixedly connected to the wall of the through hole. A semi-circular dome cover is fixedly connected to the moving end of the first electric push rod. The detection device of this invention has the functions of keyway smoothness detection and rotor cooling fan airflow detection. It simultaneously completes two easily overlooked items in conventional testing—keyway fit quality and fan cooling performance—during the rotor assembly stage, enabling multi-dimensional defect screening. This effectively improves the comprehensiveness and efficiency of rotor defect detection, reduces rework workload in subsequent assembly processes, reduces the labor intensity of workers, ensures stable production rhythm, and significantly improves the pass rate and efficiency of subsequent motor assembly.

Description

Technical Field

[0001] This invention belongs to the technical field of rotor testing equipment, and in particular relates to a device for detecting defects in motor rotors. Background Technology

[0002] The motor rotor assembly is the core rotating component that enables the electromechanical energy conversion of a motor. It typically consists of a shaft, rotor winding assembly, cooling fan, and bearings at both ends. Its machining and assembly quality directly determines the motor's torque output stability, vibration and noise levels, temperature rise, and overall service life. After the rotor assembly is assembled, geometric deviations, structural defects, and performance deficiencies of various components become apparent. Therefore, systematic defect detection must be carried out at this stage to intercept defective products in advance and prevent them from flowing into subsequent final assembly stages, thus avoiding unnecessary waste of assembly time and material costs.

[0003] Existing defect detection methods for motor rotor assemblies generally focus on conventional electromagnetic and mechanical performance dimensions such as DC resistance testing, overall dynamic balance verification, shaft form and position tolerance testing, conductor bar continuity screening, and surface appearance defect identification. These methods have the following blind spots: As the core force-bearing structure for torque transmission, the keyway at the drive end of the motor rotor assembly is often overlooked in routine inspections, which only verify basic dimensions such as slot width and depth. This can easily lead to scratches on the mating surfaces and insufficient effective contact area during key press-fitting, accelerated fretting wear on the mating surfaces during operation, and a gradual increase in transmission clearance. At the same time, microscopic tool marks on the inner wall and right-angle roots at the ends can form stress concentration sources, significantly increasing the risk of keyway cracking and shaft extension fracture, directly affecting the reliability and operational safety of the drive end transmission.

[0004] The ventilation and heat dissipation performance testing of the cooling fan in the motor rotor assembly is generally done after the fact. Only visual inspection of the appearance integrity is performed at the rotor assembly stage. The heat dissipation effect needs to be indirectly verified through temperature rise test after the motor is fully assembled. If the air volume is not up to standard or the heat dissipation capacity is insufficient, the whole machine must be disassembled and reworked. This not only increases the labor intensity of the staff, but also disrupts the production rhythm and significantly reduces the efficiency of subsequent motor assembly.

[0005] Therefore, we propose a motor rotor defect detection device to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a motor rotor defect detection device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a motor rotor defect detection device, comprising an L-shaped base, an L-shaped top plate fixedly connected to the upper surface of the horizontal part of the L-shaped base, a through hole opened in the horizontal part of the L-shaped top plate, and a first electric push rod fixedly connected to the wall of the through hole, and a semi-circular top cover fixedly connected to the moving end of the first electric push rod. A semi-circular bottom cover that mates with the semi-circular top cover is fixedly connected to the upper surface of the horizontal part of the L-shaped base. The side walls of the semi-circular dome cover and the semi-circular bottom cover are fixedly connected to a heat dissipation detection mechanism. A drive mechanism is fixedly connected to the outer wall of the vertical part of the L-shaped base; A feedback mechanism is fixedly connected to the upper surface of the horizontal part of the L-shaped top plate.

[0008] In the aforementioned motor rotor defect detection device, the heat dissipation detection mechanism includes two symmetrically distributed semi-circular hoods of the same specification. The outer walls of the two semi-circular hoods on opposite sides are in contact with each other. The side walls of the two semi-circular hoods are fixedly connected to the side walls of the semi-circular top cover and the semi-circular bottom cover, respectively. Multiple ventilation holes are provided on the outer walls of the two semi-circular hoods. A horn-shaped semi-circular air guide cover is fixedly connected to the inner walls of the two semi-circular hoods. The outer walls of the two horn-shaped semi-circular air guide covers on opposite sides are in contact with each other. A mounting through hole is provided on the lower surface of one of the horn-shaped semi-circular air guide covers, and an air volume sensor is fixedly connected to the wall of the mounting through hole. Multiple exhaust holes are provided on the outer walls of the semi-circular top cover and the semi-circular bottom cover.

[0009] In the aforementioned motor rotor defect detection device, the drive mechanism includes a servo motor fixedly connected to the outer wall of the vertical part of an L-shaped base. A bevel gear is fixedly connected to the output end of the servo motor. A U-shaped frame is fixedly connected to the surface of the L-shaped base. A through hole is opened on one side of the outer wall of the U-shaped frame, and a transmission steel pipe is rotatably mounted on the wall of the through hole via a fixed bearing. A bevel gear ring that meshes with the bevel gear is fixedly sleeved on the bottom outer wall of the transmission steel pipe. A through hole is opened on the outer wall of the end of the transmission steel pipe away from the bevel gear ring, and a U-shaped moving rod is slidably sleeved on the wall of the through hole. A U-shaped block is fixedly connected to the wall of the U-shaped moving rod. A second electric push rod is fixedly embedded on the side end of the transmission steel pipe. The moving end of the second electric push rod is fixedly connected to the bottom outer wall of the U-shaped moving rod. A pressure sensor is fixedly connected to the top outer wall of the U-shaped block. A keyway is opened on the bottom outer wall of the U-shaped block, and a standard connecting flat key is slidably connected to the wall of the keyway.

[0010] In the aforementioned motor rotor defect detection device, a fixing hole is provided on the outer wall of the other side of the U-shaped frame, and a conductive slip ring is fixedly connected to the wall of the fixing hole. The outer wall of the rotating part of the conductive slip ring is fixedly connected to the inner wall of the side end of the transmission steel pipe.

[0011] In the aforementioned motor rotor defect detection device, the top end of the standard connecting key is in contact with the measuring end of the pressure sensor, and a limit stop is fixedly sleeved on the outer wall of the standard connecting key.

[0012] In the aforementioned motor rotor defect detection device, the feedback mechanism includes a PLC controller and an audible and visual alarm fixedly connected to the upper surface of the horizontal part of the L-shaped top plate, and a touch screen control panel is fixedly connected to the outer wall of the vertical part of the L-shaped base.

[0013] In the aforementioned motor rotor defect detection device, a rectangular clearance hole is provided on the lower surface of the horizontal part of the L-shaped base for the U-shaped moving rod and U-shaped block to rotate through, and shock-absorbing support blocks are fixedly connected to the four corners of the lower surface of the L-shaped base.

[0014] In the aforementioned motor rotor defect detection device, the two opposite side walls of the semi-circular top cover and the semi-circular bottom cover are provided with semi-circular bearing slots for limiting the bearings of the rotor assembly.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. Through the set drive mechanism, when the keyway fit quality of the rotor assembly drive end is checked, the second electric push rod pushes the U-shaped moving rod to move, causing the U-shaped block and the standard connecting key to be inserted into the keyway of the rotor shaft at a uniform speed. During the insertion process, the frictional resistance generated by the inner wall of the keyway is transmitted in reverse to the measuring end of the pressure sensor. The pressure sensor transmits the collected force signal to the PLC controller through the conductive slip ring and compares it with the preset alarm threshold. If the resistance exceeds the standard, the audible and visual alarm is triggered to issue a warning. This structure enables the detection device to have the function of rotor keyway quality detection, which can avoid the hidden dangers of subsequent assembly damage and insufficient effective contact area caused by rough inner wall of keyway and burr protrusion. It also reduces the risk of transmission clearance expansion and keyway stress concentration cracking during operation, realizes the pre-quantitative detection of keyway fit quality, and improves the detection coverage of drive end transmission reliability.

[0016] 2. Through the established heat dissipation detection mechanism, when the ventilation performance of the rotor cooling fan is tested, the semi-circular top cover moves down and closes with the semi-circular bottom cover. The two sets of semi-circular fan covers then correspond and fit with the horn-shaped semi-circular air guide cover, forming a complete airflow cavity. The servo motor drives the rotor assembly to reach the preset rated speed via a keyway. The cooling fan at the rotor end rotates synchronously, drawing in outside air. The airflow enters the air cavity through the vents on the side wall of the semi-circular fan cover, is converged and rectified into a uniform airflow by the horn-shaped semi-circular air guide cover, and then flows through the airflow sensor. The airflow sensor transmits real-time airflow data to the PLC controller for qualification judgment. Afterward, the airflow is discharged through the exhaust port, restoring the actual heat dissipation airflow path of the motor. This mechanism solves the problem that existing cooling fan performance testing is generally done after the motor assembly, requiring indirect verification through temperature rise tests. It allows for quantitative testing of heat dissipation capacity at the rotor assembly stage, intercepting defective products in advance, avoiding disassembly and rework due to unqualified airflow, reducing labor time, lowering the workload of workers, ensuring stable production rhythm, and significantly improving the qualification rate and efficiency of subsequent motor assembly.

[0017] 3. Through the set feedback mechanism, when performing defect detection on the rotor assembly, the keyway fit quality and cooling fan ventilation performance, two common and easily overlooked inspection items, can be inspected sequentially. During the clamping stage, the rotor is quickly positioned through the semi-circular bearing slot. After the cover is closed, the bearing limit and air duct assembly are completed simultaneously. Each inspection process is automatically executed by the PLC controller according to the preset logic. Non-conforming items are fed back in real time through the audible and visual alarm, which can effectively improve the comprehensiveness and efficiency of rotor assembly defect detection. The device's open and close clamping mode can improve the ease of operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a motor rotor defect detection device provided by the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure in partial cross-section; Figure 3 yes Figure 2 Enlarged structural diagram of the heat dissipation detection mechanism; Figure 4 yes Figure 1 A schematic diagram of the structure of the middle semi-circular dome and the semi-circular bottom cover in their closed state; Figure 5 yes Figure 1 A three-dimensional structural diagram of the middle semi-circular wind shield section; Figure 6 yes Figure 2 Enlarged structural diagram of the central drive mechanism; Figure 7 yes Figure 1 A schematic diagram of the structure of a standard connecting flat key inserted into the keyway of a motor rotor assembly.

[0019] In the diagram: 1. L-shaped base; 2. L-shaped top plate; 3. First electric push rod; 4. Semi-circular top cover; 5. Semi-circular bottom cover; 6. Heat dissipation detection mechanism; 61. Semi-circular fan cover; 62. Vent hole; 63. Horn-shaped semi-circular air guide cover; 64. Air volume sensor; 65. Exhaust hole; 7. Drive mechanism; 71. Servo motor; 72. Bevel gear; 73. U-shaped frame; 74. Transmission steel pipe; 75. Bevel gear ring; 76. U-shaped moving rod; 77. U-shaped block; 78. Second electric push rod; 79. Pressure sensor; 710. Standard connection key; 8. Feedback mechanism; 81. PLC controller; 82. Audible and visual alarm; 83. Touch screen control panel; 9. Conductive slip ring; 10. Limit stop; 11. Rectangular clearance hole; 12. Vibration damping support block; 13. Semi-circular bearing slot. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-7 As shown, a motor rotor defect detection device includes an L-shaped base 1, an L-shaped top plate 2 fixedly connected to the upper surface of the horizontal part of the L-shaped base 1, a through hole opened in the horizontal part of the L-shaped top plate 2, and a first electric push rod 3 fixedly connected to the wall of the through hole, a semi-circular top cover 4 fixedly connected to the moving end of the first electric push rod 3, and a semi-circular bottom cover 5 that cooperates with the semi-circular top cover 4 fixedly connected to the upper surface of the horizontal part of the L-shaped base 1.

[0022] The side walls of the semi-circular dome cover 4 and the semi-circular bottom cover 5 are fixedly connected to a heat dissipation detection mechanism 6. The heat dissipation detection mechanism 6 includes two symmetrically distributed semi-circular hoods 61 of the same specification. The outer walls of the two semi-circular hoods 61 on opposite sides are in contact with each other. The side walls of the two semi-circular hoods 61 are fixedly connected to the side walls of the semi-circular dome cover 4 and the semi-circular bottom cover 5, respectively. Multiple ventilation holes 62 are opened on the outer walls of the two semi-circular hoods 61. A horn-shaped semi-circular air guide cover 63 is fixedly connected to the inner walls of the two semi-circular hoods 61. The outer walls of the two horn-shaped semi-circular air guide covers 63 on opposite sides are in contact with each other. An installation through hole is opened on the lower surface of one of the horn-shaped semi-circular air guide covers 63, and an air volume sensor 64 is fixedly connected to the wall of the installation through hole. Multiple exhaust holes 65 are opened on the outer walls of the semi-circular dome cover 4 and the semi-circular bottom cover 5.

[0023] A drive mechanism 7 is fixedly connected to the outer wall of the vertical part of the L-shaped base 1. The drive mechanism 7 includes a servo motor 71 fixedly connected to the outer wall of the vertical part of the L-shaped base 1. A bevel gear 72 is fixedly connected to the output end of the servo motor 71. A U-shaped frame 73 is fixedly connected to the surface of the L-shaped base 1. A through hole is opened on one side of the outer wall of the U-shaped frame 73, and a transmission steel pipe 74 is rotatably mounted on the wall of the through hole through a fixed bearing. A bevel gear ring 75 that meshes with the bevel gear 72 is fixedly sleeved on the outer wall of the bottom end of the transmission steel pipe 74. A through hole is opened on the outer wall of the end of the transmission steel pipe 74 away from the bevel gear ring 75, and a U-shaped moving rod 76 is slidably sleeved on the wall of the through hole. A U-shaped block 7 is fixedly connected to the rod wall of the U-shaped moving rod 76. 7. A second electric push rod 78 is fixedly embedded in the side end of the transmission steel pipe 74. The moving end of the second electric push rod 78 is fixedly connected to the bottom outer wall of the U-shaped moving rod 76. A pressure sensor 79 is fixedly connected to the top outer wall of the U-shaped block 77. A keyway is opened in the bottom outer wall of the U-shaped block 77, and a standard connecting flat key 710 is slidably connected to the hole wall of the keyway. A fixing hole is opened in the other outer wall of the U-shaped frame 73, and a conductive slip ring 9 is fixedly connected to the hole wall of the fixing hole. The outer wall of the rotating part of the conductive slip ring 9 is fixedly connected to the inner wall of the side end of the transmission steel pipe 74. The top end of the standard connecting flat key 710 contacts the measuring end of the pressure sensor 79. A limit stop 10 is fixedly sleeved on the outer wall of the standard connecting flat key 710.

[0024] The bevel ring 75 and the transmission steel pipe 74 are located on the same horizontal axis at the center of the side end where the bevel ring 75 is installed and the center of the rotor assembly shaft. The transmission steel pipe 74 will rotate around this horizontal axis, thereby ensuring that the drive mechanism 7 can reliably drive the rotor assembly shaft to rotate.

[0025] A feedback mechanism 8 is fixedly connected to the upper surface of the horizontal part of the L-shaped top plate 2. The feedback mechanism 8 includes a PLC controller 81 and an audible and visual alarm 82, which are fixedly connected to the upper surface of the horizontal part of the L-shaped top plate 2. A touch screen control panel 83 is fixedly connected to the outer wall of the vertical part of the L-shaped base 1. This mechanism can improve the automation level of the detection device and improve the ease of use of the device.

[0026] The lower surface of the horizontal part of the L-shaped base 1 is provided with a rectangular clearance hole 11 for the U-shaped moving rod 76 and the U-shaped block 77 to rotate through. The four corners of the lower surface of the L-shaped base 1 are fixedly connected with shock-absorbing support blocks 12. The rectangular clearance hole 11 can not only ensure the normal operation of the drive mechanism 7, but also reduce the weight of the device and facilitate the handling of the device.

[0027] The two opposite side walls of the semi-circular top cover 4 and the semi-circular bottom cover 5 are provided with semi-circular bearing slots 13 for limiting the bearings of the rotor assembly. The semi-circular bearing slots 13 can improve the stability of the semi-circular top cover 4 and the semi-circular bottom cover 5 in limiting the rotor assembly.

[0028] The first electric actuator 3, servo motor 71, second electric actuator 78, and audible and visual alarm 82 are all electrically connected to the output terminal of PLC controller 81 via wires. The touch screen control panel 83, air volume sensor 64, and pressure sensor 79 are electrically connected to the input terminal of PLC controller 81 via wires. The above-mentioned electrical components and electrical connections are all existing technologies and will not be described in detail here.

[0029] The operating principle of the present invention is described as follows: When the device performs defect detection of motor rotor assembly, the detection parameters are preset first. The operator inputs the corresponding rated speed parameters to the PLC controller 81 through the touch screen control panel 83 according to the rated power of the motor matched with the rotor assembly to be tested. At the same time, the keyway insertion resistance alarm threshold and the qualified air volume threshold of the cooling fan are preset to complete the parameter preparation before the test.

[0030] The first step is to load and position the rotor assembly, such as... Figures 1-4 As shown, the operator places the rotor assembly to be tested inside the semi-circular bottom cover 5, so that the bearings at both ends of the rotor assembly are embedded in the semi-circular bearing slots 13 on both sides of the semi-circular bottom cover 5, thereby achieving the initial radial and axial positioning of the rotor assembly.

[0031] The second step is to seal the enclosure and assemble the air duct, such as... Figures 1-3 As shown, after the parameters are set, the staff sends instructions to the PLC controller 81 through the touch screen control panel 83. The PLC controller 81 controls the moving end of the first electric push rod 3 to extend downward, driving the semi-circular dome cover 4 to move downward synchronously until the semi-circular dome cover 4 and the semi-circular bottom cover 5 are closed and fitted together.

[0032] After closing, the semi-circular bearing slots 13 at both ends of the semi-circular top cover 4 and the semi-circular bottom cover 5 together form a complete bearing limiting groove, further fixing the rotation center of the rotor assembly; at the same time, the upper and lower sets of semi-circular wind covers 61 and the trumpet-shaped semi-circular air guide covers 63 are fitted together to form a complete air guide cavity, providing a stable airflow channel for subsequent airflow detection. This openable cover structure can quickly complete rotor clamping and air duct assembly, improving the convenience of clamping operation.

[0033] The third step involves quality inspection of the keyway on the drive side, such as... Figure 2 , Figure 6 and Figure 7 As shown, the operator manually rotates the rotor assembly shaft to circumferentially align the keyway at the end of the shaft with the standard connecting key 710. After alignment, a detection command is sent through the touch screen control panel 83. The PLC controller 81 controls the moving end of the second electric push rod 78 to extend at a constant speed, pushing the U-shaped moving rod 76 to slide forward along the through hole of the transmission steel pipe 74. This, in turn, causes the U-shaped block 77 and the standard connecting key 710 to be inserted into the keyway of the rotor assembly at a constant speed. The limit stop 10 can prevent the standard connecting key 710 from separating from the U-shaped block 77.

[0034] During insertion, the frictional resistance of the standard connecting key 710 against the inner wall of the keyway is transmitted in reverse to the measuring end of the pressure sensor 79. The pressure sensor 79 converts the real-time force signal into an electrical signal, which is then transmitted to the PLC controller 81 via the conductive slip ring 9. The second electric push rod 78 is also electrically connected to the output end of the PLC controller 81 via the conductive slip ring 9. The rotating part of the conductive slip ring 9 rotates synchronously with the transmission steel pipe 74, while the fixed part is connected to the external wiring. This allows for stable transmission of electrical signals during rotation and prevents wiring entanglement.

[0035] If the inner wall of the keyway is smooth and the dimensions are compliant, the insertion resistance of the standard connection flat key 710 is small, and the detected value is lower than the preset alarm threshold, so the PLC controller 81 will not trigger an alarm. If the inner wall of the keyway is rough, has burrs or protrusions, or has dimensional deviations, the resistance will increase significantly during insertion. When the detected value exceeds the preset threshold, the PLC controller 81 will control the audible and visual alarm 82 to issue an alarm, reminding the staff that the keyway fit of the rotor assembly is unqualified and that rework can be arranged in a timely manner.

[0036] In addition, the standard connecting key 710 is replaced regularly to ensure the reliability of its specifications, thereby ensuring the accuracy of the keyway quality test results.

[0037] This structure enables the device to perform quality inspection of the keyway of the motor rotor. It indirectly evaluates the quality of the inner wall of the keyway and the fitting accuracy by measuring the insertion resistance. This achieves pre-inspection of keyway items that are easy to miss, which can reduce the risk of poor fit and insufficient transmission reliability during subsequent assembly.

[0038] The fourth step is to test the ventilation performance of the cooling fan, such as... Figures 1-7 As shown, after the keyway fit quality inspection is qualified, the PLC controller 81 controls the servo motor 71 to start. The output end of the servo motor 71 drives the bevel gear 72 to rotate. Through the meshing transmission between the bevel gear 72 and the bevel gear ring 75, the transmission steel pipe 74 is driven to rotate around the axis under the bearing support of the U-shaped frame 73. The transmission ratio between the bevel gear 72 and the bevel gear ring 75 is 1:1. This transmission structure only changes the transmission direction and does not change the speed, ensuring that the speed of the rotor assembly shaft is consistent with the speed of the servo motor 71 output end, reaching the preset rated speed. The transmission steel pipe 74, through the keyway fit between the U-shaped moving rod 76, the U-shaped block 77 and the standard connecting flat key 710, transmits the torque to the rotor assembly shaft end, driving the rotor assembly to rotate stably at the preset rated speed.

[0039] When the rotor assembly rotates, the cooling fan at its end rotates synchronously to simulate the actual air intake and heat dissipation state of the motor: outside air enters the air cavity through the vent 62 on the side wall of the semi-circular shroud 61, and after being converged and rectified by the trumpet-shaped semi-circular air guide shroud 63, the turbulent airflow is regulated into a uniform and stable axial airflow, and then flows through the detection area of ​​the airflow sensor 64; the airflow sensor 64 collects volumetric airflow data in real time and transmits it to the PLC controller 81, compares it with the preset qualified airflow threshold, and the airflow is finally discharged through the exhaust holes 65 at the semi-circular top cover 4 and the semi-circular bottom cover 5.

[0040] If the air volume sensor 64 detects an air volume greater than or equal to the preset air volume threshold, it indicates that the cooling fan's heat dissipation capacity meets the requirements, and the PLC controller 81 will not trigger an alarm. If the detected air volume is lower than the preset air volume threshold, it indicates that the cooling fan's heat dissipation capacity is insufficient, which may lead to excessively rapid temperature rise in the motor after assembly, affecting the safety and reliability of the motor. In this case, the PLC controller 81 will control the audible and visual alarm 82 to issue an alarm prompt.

[0041] This mechanism can quantitatively test the ventilation performance of the cooling fan during the rotor assembly stage by simulating the airflow structure of a real fan shroud. It eliminates the need to wait for indirect verification through temperature rise tests after the motor is assembled, thereby reducing the time lost due to disassembly and rework of the entire machine. This not only reduces the labor intensity of the staff but also ensures stable production rhythm and reduces manufacturing costs.

[0042] Step 5: Inspection completed and material unloading and resetting, as follows Figure 1 and Figure 2 As shown, after all the test items are completed, the PLC controller 81 controls the servo motor 71 to stop running, and then controls the second electric push rod 78 to retract, driving the standard connecting key 710 to exit from the rotor keyway to the initial position; then the PLC controller 81 controls the first electric push rod 3 to retract, driving the semi-circular dome cover 4 to move up and reset, and the staff can take out the rotor assembly that has completed the test, classify and transfer qualified and unqualified products to the next process.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting defects in a rotor of an electric machine, comprising an L-shaped base (1), characterized in that, An L-shaped top plate (2) is fixedly connected to the upper surface of the horizontal part of the L-shaped base (1). The horizontal part of the L-shaped top plate (2) has a through hole, and a first electric push rod (3) is fixedly connected to the wall of the through hole. A semi-circular top cover (4) is fixedly connected to the moving end of the first electric push rod (3). The upper surface of the horizontal part of the L-shaped base (1) is fixedly connected to a semi-circular bottom cover (5) that matches the semi-circular top cover (4). The side walls of the semi-circular dome cover (4) and the semi-circular bottom cover (5) are fixedly connected to a heat dissipation detection mechanism (6). A drive mechanism (7) is fixedly connected to the outer wall of the vertical part of the L-shaped base (1). A feedback mechanism (8) is fixedly connected to the upper surface of the horizontal part of the L-shaped top plate (2).

2. The motor rotor flaw detection device of claim 1, wherein, The heat dissipation detection mechanism (6) includes two symmetrically distributed semi-circular hoods (61) of the same specification. The outer walls of the two semi-circular hoods (61) on opposite sides are in contact with each other. The side walls of the two semi-circular hoods (61) are fixedly connected to the side walls of the semi-circular top cover (4) and the semi-circular bottom cover (5), respectively. Multiple ventilation holes (62) are opened on the outer walls of the two semi-circular hoods (61). A horn-shaped semi-circular air guide cover (63) is fixedly connected to the inner walls of the two semi-circular hoods (61). The outer walls of the two horn-shaped semi-circular air guide covers (63) on opposite sides are in contact with each other. An installation through hole is opened on the lower surface of one of the horn-shaped semi-circular air guide covers (63), and an air volume sensor (64) is fixedly connected to the wall of the installation through hole. Multiple exhaust holes (65) are opened on the outer walls of the semi-circular top cover (4) and the semi-circular bottom cover (5).

3. The motor rotor flaw detection apparatus of claim 1, wherein The drive mechanism (7) includes a servo motor (71) fixedly connected to the outer wall of the vertical part of the L-shaped base (1). A bevel gear (72) is fixedly connected to the output end of the servo motor (71). A U-shaped frame (73) is fixedly connected to the surface of the L-shaped base (1). A through hole is opened on one side of the outer wall of the U-shaped frame (73), and a transmission steel pipe (74) is rotatably mounted on the wall of the through hole through a fixed bearing. A bevel gear ring (75) that meshes with the bevel gear (72) is fixedly sleeved on the outer wall of the bottom end of the transmission steel pipe (74). The transmission steel pipe (74) is far away from the bevel gear ring (75). A through hole is provided on one end of the outer wall, and a U-shaped moving rod (76) is slidably sleeved on the wall of the through hole. A U-shaped block (77) is fixedly connected to the wall of the U-shaped moving rod (76). A second electric push rod (78) is fixedly embedded on the side end of the transmission steel pipe (74). The moving end of the second electric push rod (78) is fixedly connected to the bottom outer wall of the U-shaped moving rod (76). A pressure sensor (79) is fixedly connected to the top outer wall of the U-shaped block (77). A keyway is provided on the bottom outer wall of the U-shaped block (77), and a standard connecting flat key (710) is slidably connected to the wall of the keyway.

4. A motor rotor flaw detection apparatus according to claim 3, characterized in that, The other side of the outer wall of the U-shaped frame (73) is provided with a fixing hole, and a conductive slip ring (9) is fixedly connected to the wall of the fixing hole. The outer wall of the rotating part of the conductive slip ring (9) is fixedly connected to the inner wall of the side end of the transmission steel pipe (74).

5. The motor rotor flaw detection apparatus according to claim 3, characterized by The top end of the standard connecting key (710) is in contact with the measuring end of the pressure sensor (79), and a limit stop (10) is fixedly sleeved on the outer wall of the standard connecting key (710).

6. The motor rotor flaw detection apparatus of claim 1, wherein The feedback mechanism (8) includes a PLC controller (81) and an audible and visual alarm (82) fixedly connected to the upper surface of the horizontal part of the L-shaped top plate (2), and a touch screen control panel (83) is fixedly connected to the outer wall of the vertical part of the L-shaped base (1).

7. The motor rotor flaw detection apparatus of claim 1, wherein The lower surface of the horizontal part of the L-shaped base (1) is provided with a rectangular clearance hole (11) for the U-shaped moving rod (76) and the U-shaped block (77) to rotate through. The four corners of the lower surface of the L-shaped base (1) are fixedly connected with shock-absorbing support blocks (12).

8. The motor rotor flaw detection apparatus of claim 1, wherein The two side walls of the semi-circular top cover (4) and the semi-circular bottom cover (5) are provided with semi-circular bearing slots (13) for limiting the bearings of the rotor assembly.

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