Overspeed test device for commutators

Abstract

This utility model provides a technical field of testing devices, disclosing an overspeed testing device for commutators, including a frame with a platform on its top surface; a laser displacement sensor section mounted on the platform, comprising a laser displacement sensor for detecting inter-segment errors and circular runout errors of the commutator; a high-speed electric spindle section mounted on the platform for mounting the commutator and providing it with overspeed rotation; and an industrial hot air blower section with its outlet pointing towards the commutator to provide a heat source. The device tests and monitors inter-segment errors and circular runout errors of the commutator in real time under high-temperature and high-speed rotation conditions, providing experimental basis for commutator manufacturers to improve commutator materials and processes.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing devices, specifically relating to an overspeed testing device for a commutator. Background Technology

[0002] The commutator is a component in DC permanent magnet series motors and single-phase series motors that enables the motor to rotate continuously. To ensure the overall reliability of the motor, the structural reliability of the commutator needs to be tested at a certain speed through an overspeed test. During the overspeed test, the commutator needs to be run at a specified speed for a certain period of time according to the commutator overspeed standard. During the test, the commutator is monitored for cracking, and after the test, the commutator is checked to see if it exceeds the standard deformation limit.

[0003] Previous commutator measurement methods involved conducting overspeed tests on the commutator at room temperature and in a hot state, respectively. After the overspeed test, the commutator was removed and its circular runout and inter-segment runout were measured using an error tester. This required two types of experimental equipment: an overspeed testing machine and an error tester. The measurement process was quite cumbersome, and the measured circular runout and inter-segment runout were static error quantities, which differed significantly from the dynamic error of the commutator during actual operation. Utility Model Content

[0004] The purpose of this invention is to provide an overspeed testing device for commutators.

[0005] To address the aforementioned problems, the present invention provides an overspeed testing device for a commutator, comprising:

[0006] The frame has a table on its top surface;

[0007] The laser displacement sensor section is mounted on the platform; it includes a laser displacement sensor for detecting commutator segment errors and circular runout errors.

[0008] The high-speed electric spindle section is mounted on the table and is used to install the commutator and provide high-speed rotation to the commutator; the industrial hot air blower section has its air outlet pointing towards the commutator and is used to provide a heat source.

[0009] According to this utility model, the laser displacement sensor part further includes a base fixed on the table, a high-precision three-dimensional moving platform is installed on the base, and a sealed shell with a accommodating cavity is installed on the base. The laser position sensor is placed inside the shell to prevent the laser position sensor from being affected by impurities.

[0010] According to this utility model, the high-speed electric spindle part includes a motor mounting base fixed on the table, a high-speed motor is fixedly installed in the motor mounting base, the output section of the high-speed motor is connected to a connecting shaft, and the commutator is fixedly connected to the connecting shaft.

[0011] According to this utility model, the industrial hot air blower includes a hot air blower installed in the frame, and a guide pipe pointing towards the table surface is provided at the air outlet of the hot air blower. The two are connected by a retractable corrugated pipe. An installation plate is fixedly installed on the outer periphery of the guide pipe, and a cylinder is installed on the other side of the installation plate. When the cylinder is activated, the guide pipe is moved up and down through the installation plate.

[0012] According to this utility model, the housing further includes a lower cover with a receiving cavity fixed to the top surface of the high-precision three-dimensional moving platform and an upper cover that seals the opening of the receiving cavity.

[0013] According to this utility model, the top of the upper cover forms a long strip-shaped protruding part with a cavity, and its end face has a cold air inlet. Cold air enters the cavity inside the protruding part through the cold air inlet. A row of small holes is opened on the top surface of the protruding part. After compressed air is introduced, an air curtain is formed to block impurities from affecting the laser displacement sensor.

[0014] According to this utility model, a shock-absorbing block is further installed at the bottom of the motor mounting base.

[0015] According to this utility model, it further includes an infrared thermometer for detecting the commutator temperature.

[0016] According to this utility model, it further includes a small safety guard for protecting the high-speed electric spindle section. The small safety guard slides along the table surface so that it can move to the high-speed electric spindle section to precisely protect it. It also includes a safety guard set on the top of the table surface. A flip motor is provided on one side of the safety guard to drive the flip motor and control the flip of the safety guard. In the working state, the safety guard is fastened to protect the components located on the top surface of the table surface.

[0017] Compared with the prior art, this utility model has the following beneficial effects: when the commutator is in a high-temperature environment and rotating at high speed, the inter-segment error and circular runout error of the commutator can be tested and monitored in real time, providing experimental basis for commutator manufacturers to improve commutator materials and processes.

[0018] During commutator testing, laser displacement sensors can quickly collect commutator surface data during high-speed rotation, effectively reflecting the inter-segment and circular runout errors of the commutator during high-speed rotation.

[0019] The electric spindle is equipped with a shock absorber, which can significantly reduce the vibration generated by the motor, resulting in low noise. The commutator is easy to install and remove. The electric spindle directly drives the commutator to rotate at high speed. The structure is simple and compact, with high precision and good stability.

[0020] A high-precision laser displacement sensor is used to measure real-time data of the commutator during high-speed rotation. All components are protected by a safety shield to ensure high precision and stability, and to better measure the required error values.

[0021] Laser displacement sensors are expensive. To protect them, a row of Φ1mm holes is made in the protruding part of the top cover. Compressed air is introduced to form an air curtain, which prevents high-temperature gas, dust and other particles from entering the laser displacement sensor.

[0022] The industrial hot air heater provides a controllable heat source, allowing for preset hot air output temperature settings or program control. The heat source output is fast and stable, enabling long-term operation and high reliability. Attached Figure Description

[0023] Figure 1a This is a first-view structural schematic diagram of the overspeed test device for the commutator of this utility model;

[0024] Figure 1b This is a second-view structural schematic diagram of the overspeed test device for the commutator of this utility model;

[0025] Figure 2a This is a first-view structural schematic diagram of the laser displacement sensor of this utility model;

[0026] Figure 2b This is a schematic diagram of the laser displacement sensor of this utility model from a second perspective.

[0027] Figure 2c This is a third-view structural schematic diagram of the laser displacement sensor of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the high-speed electric spindle of this utility model;

[0029] Figure 4a This is a first-view structural schematic diagram of the industrial hot air blower of this utility model;

[0030] Figure 4b This is a second-view structural schematic diagram of the industrial hot air blower of this utility model.

[0031] In the diagram, 1-frame, 2-tabletop, 3-laser displacement sensor section, 301-upper cover, 302-lower cover, 303-laser displacement sensor, 304-high-precision three-dimensional moving platform, 305-base, 4-high-speed electric spindle section, 401-locking nut, 402-commutator, 403-connecting shaft, 404-high-speed motor, 405-positioning screw, 406-mounting base, 407-shock absorber, 5-large safety guard, 6-infrared thermometer, 7-rotating motor, 8-industrial hot air blower section, 801-hot air blower, 802-extendable corrugated pipe, 803-air duct, 804-fixing buckle, 805-mounting plate, 806-cylinder, 807-cylinder mounting plate, 9-small safety guard. Detailed Implementation

[0032] To make this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0033] like Figure 1a and 1b As shown in the figure, this application provides an overspeed testing device for a commutator, including a frame 1, a table 2, a laser displacement sensor section 3, a high-speed electric spindle section 4, a large safety guard 5, an infrared thermometer 6, an industrial hot air blower section 8, and a small safety guard 9. The frame 1 is made of aluminum alloy.

[0034] The table 2 is fixed to the top surface of the frame 1. The high-speed electric spindle part 4 and the laser displacement sensor part 3 are both fixed on the table 2, and the industrial hot air blower part 8 is set inside the frame 1, with one end fixed to the table 2.

[0035] like Figure 3 As shown, the high-speed electric spindle part 4 mainly includes a locking nut 401, a commutator 402, a connecting shaft 403, a high-speed motor 404, a positioning screw 405, a mounting base 406, and a shock absorber 407.

[0036] The high-speed motor 404 is mounted inside the motor mounting base 406 and secured by positioning screws 405. Four shock-absorbing blocks 407 are installed at the four corners of the bottom of the motor mounting base 406. The connecting shaft 403 is threadedly connected to the output end of the high-speed motor 404. The commutator 402 is mounted on the connecting shaft 403 and locked in place with a fastening nut 401. The high-speed electric spindle section 4 is fixed to the table 2 with screws. An infrared thermometer 6 is also included to detect the temperature of the commutator 602.

[0037] like Figure 4a and 4b As shown, the industrial hot air blower section 8 includes a hot air blower 801, a telescopic corrugated pipe 802, an air duct 803, a fixing buckle 804, a mounting plate 805, a cylinder 806, and a cylinder mounting plate 807. The industrial hot air blower section 8 is fixed to the table surface 2 with screws.

[0038] The hot air blower 801 is installed inside the frame 1, and an air duct 803 pointing towards the table surface is provided at the air outlet. The two are connected by a retractable corrugated pipe 802. A mounting plate 805 is provided on the outer periphery of the air duct 803. The mounting plate 805 is provided with a fixing buckle 804 to fix the air duct 803 to the mounting plate 805. A cylinder 806 is installed on the other side of the mounting plate 805, and a cylinder mounting plate 807 is provided on the other side of the cylinder 806. The cylinder 806 drives the mounting plate 805 to move vertically, that is, to move the air duct 803 closer to or away from the commutator 402, so as to realize the heat source supply.

[0039] like Figures 2a to 2c As shown, the laser displacement sensor part 3 includes an upper cover 301, a lower cover 302, a laser displacement sensor 303, a high-precision three-dimensional moving platform 304, and a base 305.

[0040] A high-precision three-dimensional moving platform 304 is mounted on a base 305. A lower cover 302 with a receiving cavity is fixedly mounted to the high-precision three-dimensional moving platform 304. A laser displacement sensor 303 is installed in the receiving cavity of the lower cover 302, and the opening of the receiving cavity of the lower cover 302 is closed by an upper cover 301. The base 305 is mounted on the platform 2, and the high-precision three-dimensional moving platform 304 is finely adjusted to the desired position. The laser displacement sensor 303 is used to detect the position of the commutator 402 surface.

[0041] Laser displacement sensors are expensive. To protect them, they are installed within the accommodating cavity of the lower cover 302, and the upper cover 301 is then placed on top to protect the laser displacement sensor. Please refer to [link / reference needed]. Figure 2c A long, hollow protrusion is formed on the top of the cover 301. The end face of the protrusion has a cold air inlet. Cold air enters the cavity inside the protrusion through the cold air inlet. A row of Φ1mm holes is opened on the top surface of the protrusion. After compressed air is introduced, an air curtain is formed to block high-temperature gas, dust and other particles from entering the laser displacement sensor 303, thereby improving the service life of the laser displacement sensor 303.

[0042] It also includes a small safety guard 9 for protecting the high-speed electric spindle section 4. The small safety guard 9 can slide along the table surface 2, allowing it to move to the high-speed electric spindle section 4 for precise protection. It also includes a safety guard 5 set on the top of the table surface 2. A flip motor 7 is set on one side of the safety guard 5. The flip motor 7 drives the flip motor to control the flip of the safety guard 5. When the small safety guard 9 moves to the corresponding position, the flip motor 7 drives the installation of the safety guard 5 to lock in place, protecting the components located on the top surface of the table surface.

[0043] The laser displacement sensor 303 and the infrared thermometer 6 are positioned to correspond to the center position of the commutator, improving detection accuracy.

[0044] The working process of this utility model:

[0045] When using this device to perform an overspeed test on the commutator, firstly, the connecting shaft 403 is installed in the inner hole of the high-speed motor 404 via a threaded fastening connection. The commutator 402 is then installed on the connecting shaft 403 and locked with the fastening nut 401. The high-precision three-dimensional moving platform 304 is adjusted so that the laser displacement sensor 303 reaches the position that can measure the surface of the commutator 402. After reaching the measurement position, the adjusting nut is locked, and compressed air is introduced to form an air curtain.

[0046] After the cylinder 806 is vented, the mounting plate 705 is lifted, thereby pulling the air guide pipe 803 upward so that its outlet part is close to the surface of the commutator 402.

[0047] The small safety cover 9 moves into place, and the safety cover 5 is covered by the flipping motor 7.

[0048] Start the frequency converter to control the high-speed motor 404 to reach the required speed, and at the same time start the hot air blower 801. After waiting for 2-5 minutes to reach the set temperature, turn on the laser displacement sensor 303 to start measuring the commutator inter-segment error and circular runout error data under overspeed conditions.

[0049] After data acquisition is complete, turn off the hot air blower 801 and slowly reduce the voltage until the high-speed motor 404 stops. Control cylinder 806 to return to its original position.

[0050] After data processing, the results are obtained to determine whether the commutator exceeds the standard deformation limit, and whether it is qualified, thus completing the commutator overspeed test.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An overspeed testing device for a commutator, characterized in that, include, The frame has a table on its top surface; The laser displacement sensor is mounted on the table surface. It includes laser displacement sensors for detecting commutator inter-segment errors and circular runout errors; The high-speed electric spindle section is mounted on the table and is used to install the commutator and provide high-speed rotation to the commutator; The industrial hot air blower section has an air outlet pointing towards a commutator to provide a heat source. The industrial hot air blower section includes a hot air blower installed in the frame, and an air guide pipe pointing towards the table surface is provided at the air outlet of the hot air blower. The two are connected by a retractable corrugated pipe. A mounting plate is fixedly installed on the outer periphery of the air guide pipe, and a cylinder is installed on the other side of the mounting plate. When the cylinder is activated, it drives the air guide pipe to move up and down through the mounting plate.

2. The overspeed testing device for a commutator as described in claim 1, characterized in that, The laser displacement sensor includes a base fixed to a platform, on which a high-precision three-dimensional moving platform is mounted. A sealed housing with a accommodating cavity is mounted on the base, and the laser position sensor is placed inside the housing to prevent the laser position sensor from being affected by impurities.

3. The overspeed testing device for a commutator as described in claim 1, characterized in that, The high-speed electric spindle includes a motor mounting base fixed on the table, a high-speed motor fixedly installed inside the motor mounting base, a connecting shaft connected to the output section of the high-speed motor, and a commutator fixedly connected to the connecting shaft.

4. The overspeed testing device for a commutator as described in claim 2, characterized in that, The housing includes a lower cover with a receiving cavity fixed to the top surface of the high-precision three-dimensional moving platform and an upper cover that seals the opening of the receiving cavity.

5. The overspeed testing device for a commutator as described in claim 4, characterized in that, The top of the cover forms a long, hollow protrusion with a cold air inlet on its end face. Cold air enters the cavity inside the protrusion through the cold air inlet. A row of small holes is opened on the top surface of the protrusion. After compressed air is introduced, an air curtain is formed to block impurities from affecting the laser displacement sensor.

6. The overspeed testing device for a commutator as described in claim 3, characterized in that, The motor mounting base is equipped with shock-absorbing blocks at its bottom.

7. The overspeed testing device for a commutator as described in claim 1, characterized in that, It also includes an infrared thermometer for detecting commutator temperature.

8. The overspeed testing device for a commutator as described in claim 1, characterized in that, It also includes a small safety guard to protect the high-speed electric spindle. The small safety guard slides along the table surface so that it can be moved to the high-speed electric spindle to precisely protect it. It also includes a safety guard set on the top of the table surface. A flip motor is set on one side of the safety guard to drive the flip motor and control the flip of the safety guard. In the working state, the safety guard is fastened to protect the components located on the top surface of the table surface.

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