A magnetic suspension motor assembly error automatic detection system and method

Abstract

The application provides a magnetic suspension motor assembly error automatic detection system and particularly relates to the technical field of detection equipment, which comprises a plurality of test circuits and a single-chip microcomputer controller, wherein the test circuit comprises a relay, the test circuit is used for controlling the attraction of the magnetic bearing in a certain direction, the single-chip microcomputer controller is used for controlling a plurality of relays and realizing the multi-directional attraction of the magnetic bearing, the single-chip microcomputer controller controls the relays to realize the multi-directional attraction of the rotor of the magnetic bearing according to a test program, and the corresponding magnetic suspension motor is marked when the magnetic bearing and the rotor are scratched or stuck, the single-chip microcomputer controller is combined with the relays, the combination control of the attraction direction of the magnetic bearing is realized, the method of controlling the magnetic bearing by using the magnetic bearing controller is replaced, and the test efficiency and test flexibility are higher.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to an automatic detection system and method for assembly errors of magnetic levitation motors. Background Technology

[0002] Magnetic levitation motors utilize electromagnetic bearings to achieve contactless and wear-free operation between the rotor and stator. They are mainly divided into two parts: the motor and the bearings. The motor can be a synchronous motor, an asynchronous motor, or other types of motors. The bearings consist of axial magnetic bearings, radial magnetic bearings, bearing sensors, and protective bearings. Due to their contactless and wear-free characteristics, magnetic levitation motors can achieve ultra-high speeds and are therefore widely used in the field of turbomachinery.

[0003] When magnetic levitation motors are used in turbine machinery, the efficiency of the turbine impeller is affected by the tip clearance, resulting in a very small protective clearance for the magnetic levitation motor in the turbine machinery. The axial bearing clearance is generally slightly larger than the protective clearance to ensure that the protective bearing is effective while preventing the axial bearing from rubbing against the rotor. However, due to the characteristic that electromagnetic force decreases as the air gap increases, the axial bearing clearance cannot be much larger than the protective clearance. At the same time, due to the existence of machining errors, sometimes the machining error is greater than the difference between the axial bearing clearance and the protective clearance, which requires manual adjustment of the protective bearing position to ensure that the protective bearing is effective and that the axial bearing does not rub against the rotor.

[0004] In most existing technologies, the internal wiring of the magnetic levitation motor is fully connected and then connected to a magnetic bearing controller. The rotor is attracted by the magnetic bearing, and the rotor is manually rotated to determine whether the rotor is rubbing against the bearing. However, this results in low detection efficiency and is not conducive to production line automation. Summary of the Invention

[0005] To address the problem of low detection efficiency, this invention proposes an automatic detection system and method for assembly errors of magnetic levitation motors.

[0006] This invention is achieved through the following technical solution: This invention proposes an automatic detection system for assembly errors of magnetic levitation motors, comprising multiple test loops and a microcontroller controller, wherein: The test circuit includes a relay, and the test circuit is used to control the magnetic bearing to engage in a certain direction; The microcontroller is used to control multiple relays and achieve multi-directional engagement of the magnetic bearing; The microcontroller controller controls the relay to engage the rotor of the magnetic bearing of the magnetic levitation motor in multiple directions according to the test program, and marks the corresponding magnetic levitation motor when the magnetic bearing and the rotor rub against each other or get stuck.

[0007] Furthermore, the test circuit also includes an adjustable power supply, which provides power to the microcontroller and provides a drive voltage based on the electrical characteristics of the magnetic bearing.

[0008] Furthermore, the test circuit also includes a fuse and a current-limiting resistor, with each relay corresponding to one fuse and one current-limiting resistor, and the fuse and the current-limiting resistor are disposed in the test circuit of the relay and the adjustable power supply.

[0009] Furthermore, the test circuit also includes a terminal block, and the adjustable power supply is sequentially connected to a fuse, a current-limiting power supply, a relay, and the terminal block, and then connected back to the adjustable power supply to form the test circuit.

[0010] Furthermore, it also includes a small motor and a motor drive board. The small motor is mounted on the rotor of the magnetic levitation motor, and the motor drive board is used to drive the small motor or the magnetic levitation motor to rotate at low speed and to identify the motor's rotation or stall state.

[0011] Furthermore, it also includes a display screen, which is connected to the microcontroller controller. The display screen is used to issue an alarm when the magnetic bearing experiences friction or jamming due to attraction in one or more directions.

[0012] Furthermore, an automatic detection method for assembly errors of a magnetic levitation motor includes: Connect the magnetic bearing power cord to the terminal block, input the voltage value for testing the magnetic bearing, and install a small motor to drive the rotor of the magnetic levitation motor or directly drive the magnetic levitation motor under test to rotate the rotor. The microcontroller automatically closes the relay according to the test program; When the magnetic bearing engages in one or more directions and the rotor scrapes or gets stuck, the microcontroller will issue an alarm on the screen and mark the corresponding magnetic levitation motor, and finally enter the error adjustment stage.

[0013] The beneficial effects of this invention are: The automatic detection system for assembly errors of magnetic levitation motors proposed in this invention utilizes a single-chip microcomputer controller in conjunction with relays to perform combined control of the magnetic bearing's attraction direction, replacing the method of using a magnetic bearing controller to control the magnetic bearing, thus improving testing efficiency and flexibility.

[0014] The automatic detection system for assembly errors of magnetic levitation motors proposed in this invention uses an adjustable power supply, which can measure magnetic bearings with different pressure resistance, and has universality, which can meet the testing of different types of magnetic bearings. At the same time, it uses a small motor or directly drives the magnetic levitation motor to determine the rotor state by changing the current, which can replace human judgment and has higher detection efficiency. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the automatic assembly error detection system for magnetic levitation motors of the present invention; In the diagram: 1. Microcontroller controller; 2. Screen; 3. Motor driver board; 4. Adjustable power supply; 5. Small motor; 6. Fuse; 7. Current limiting power supply; 8. Relay; 9. Terminal block. The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0016] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0017] Please refer to Figure 1 This invention proposes an automatic detection system for assembly errors of a magnetic levitation motor, comprising multiple test circuits and a single-chip microcontroller 1, wherein: The test circuit includes relay 8, which is used to control the magnetic bearing to engage in a certain direction; The microcontroller 1 is used to control multiple relays 8 and realize the multi-directional engagement of the magnetic bearing; The microcontroller 1 controls the relay 8 to engage the magnetic bearing of the magnetic levitation motor in multiple directions according to the test program, and marks the corresponding magnetic levitation motor when the magnetic bearing rubs against or gets stuck with the rotor.

[0018] Specifically, the single-chip controller can adjust the output voltage, and the test circuit is used to control the magnetic bearing to engage in a certain direction. The single-chip controller combines multiple test circuits and controls the magnetic bearing to engage in multiple directions through relay 8. By using the single-chip controller 1 in conjunction with relay 8, the magnetic bearing engagement direction can be controlled in combination, which replaces the method of using a magnetic bearing controller to control the magnetic bearing, resulting in higher testing efficiency and testing flexibility.

[0019] Furthermore, the test circuit also includes an adjustable power supply 4, which provides power to the microcontroller controller 1 and provides drive voltage according to the electrical characteristics of the magnetic bearing.

[0020] Specifically, the adjustable power supply 4 can provide different voltages for the magnetic bearings to meet the testing needs of different types of magnetic bearings, thereby enabling the testing of different types or different pressure-resistant magnetic bearings.

[0021] Furthermore, the test circuit also includes a fuse 6 and a current-limiting resistor. Each relay 8 corresponds to a fuse 6 and a current-limiting resistor. The fuse 6 and the current-limiting resistor are set in the test circuit of the relay 8 and the adjustable power supply 4.

[0022] Specifically, fuse 6 and current-limiting resistor prevent the adjustable power supply 4 from burning out if the magnetic bearing is damaged.

[0023] Furthermore, the test circuit also includes terminal block 9, and the adjustable power supply 4 is connected in sequence to fuse 6, current limiting power supply 7, relay 8, terminal block 9 and back to adjustable power supply 4 to form the test circuit.

[0024] Specifically, terminal 9 is used to connect the power supply line of the magnetic bearing, and each terminal 9 corresponds to a relay 8 to control the magnetic bearing and the rotor to engage in different directions.

[0025] Furthermore, it also includes a small motor 5 and a motor drive board 3. The small motor 5 is mounted on the rotor of the magnetic levitation motor, and the motor drive board 3 is used to drive the small motor 5 or the magnetic levitation motor to rotate at low speed and to identify the motor's rotation or stall state.

[0026] Specifically, the small motor 5 is used to drive the rotor to move, and the motor drive board 3 is used to drive the small motor 5 or the magnetic levitation motor to rotate. In specific testing, the small motor 5 can be installed on the rotor of the magnetic levitation motor to drag the magnetic levitation motor rotor to move, or the magnetic levitation motor can be directly driven to rotate. When the magnetic levitation motor rotor is scratched or jammed, the small motor 5 will be in a stalled or abnormal current state, which will be identified by the motor drive board 3 and the motor status will be determined by the microcontroller 1.

[0027] In one embodiment, the test system can be equipped with a magnetic bearing displacement monitoring module, which is directly connected to the microcontroller 1 to detect whether the magnetic bearing displacement sensor is working properly.

[0028] Furthermore, it also includes a display screen 2, which is connected to the microcontroller 1. The display screen 2 is used to issue an alarm when the magnetic bearing is attracted in one or more directions and scrapes or gets stuck.

[0029] Specifically, the microcontroller controller 1 displays information on screen 2 and issues alarms through screen 2 to facilitate subsequent error adjustment. At the same time, the output voltage of the microcontroller controller 1 can also be adjusted through screen 2.

[0030] Furthermore, an automatic detection method for assembly errors of a magnetic levitation motor includes: Connect the magnetic bearing power cord to terminal 9, input the voltage value for testing the magnetic bearing, and install the small motor 5 to drive the rotor of the magnetic levitation motor or directly drive the magnetic levitation motor under test to rotate the rotor. The microcontroller controller 1 automatically closes the relay 8 according to the test program; When the magnetic bearing engages in one or more directions and the rotor scrapes or gets stuck, the microcontroller controller 1 will issue an alarm through the screen 2 and mark the corresponding magnetic levitation motor, and finally enter the error adjustment stage.

[0031] Specifically, the magnetic bearing controls the engagement of the rotor in one or more directions. If the rotor scrapes or gets stuck, it means that the position of the protective bearing needs to be adjusted. The magnetic levitation motor is marked, and finally the magnetic levitation motor is adjusted according to the marking.

[0032] In one embodiment, a switch can be manually controlled to replace the microcontroller-controlled relay 8 to achieve the rapid measurement function of the magnetic bearing; or the motor drive board 3 can be omitted and the rotor can be manually rotated to determine whether the protective bearing is in normal working condition; the same effect can be achieved.

[0033] Of course, the present invention may have many other embodiments. Based on this embodiment, other embodiments obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention.

Claims

1. An automatic detection system for assembly errors of a magnetic levitation motor, characterized in that, It includes multiple test loops and a microcontroller controller, among which: The test circuit includes a relay, and the test circuit is used to control the magnetic bearing to engage in a certain direction; The microcontroller is used to control multiple relays and achieve multi-directional engagement of the magnetic bearing; The microcontroller controller controls the relay to engage the rotor of the magnetic bearing of the magnetic levitation motor in multiple directions according to the test program, and marks the corresponding magnetic levitation motor when the magnetic bearing and the rotor rub against each other or get stuck.

2. The automatic detection system for assembly errors of a magnetic levitation motor according to claim 1, characterized in that, The test circuit also includes an adjustable power supply, which provides power to the microcontroller and provides drive voltage according to the electrical characteristics of the magnetic bearing.

3. The automatic detection system for assembly errors of a magnetic levitation motor according to claim 2, characterized in that, The test circuit also includes a fuse and a current-limiting resistor. Each relay corresponds to one fuse and one current-limiting resistor. The fuse and the current-limiting resistor are set in the test circuit of the relay and the adjustable power supply.

4. The automatic detection system for assembly errors of a magnetic levitation motor according to claim 3, characterized in that, The test circuit also includes a terminal block. The adjustable power supply is connected in sequence to a fuse, a current-limiting power supply, a relay, and the terminal block, and then back to the adjustable power supply to form the test circuit.

5. The automatic detection system for assembly errors of a magnetic levitation motor according to claim 1, characterized in that, It also includes a small motor and a motor drive board. The small motor is mounted on the rotor of the magnetic levitation motor, and the motor drive board is used to drive the small motor or the magnetic levitation motor to rotate at low speed and to identify the motor's rotation or stall state.

6. The automatic detection system for assembly errors of a magnetic levitation motor according to claim 1, characterized in that, It also includes a display screen, which is connected to the microcontroller controller. The display screen is used to issue an alarm when the magnetic bearing is attracted in one or more directions and scrapes or gets stuck.

7. An automatic detection method for assembly errors of a magnetic levitation motor, applied to an automatic detection system for assembly errors of a magnetic levitation motor as described in any one of claims 1-6, comprising: Connect the magnetic bearing power cord to the terminal block, input the voltage value for testing the magnetic bearing, and install a small motor to drive the rotor of the magnetic levitation motor or directly drive the magnetic levitation motor under test to rotate the rotor. The microcontroller automatically closes the relay according to the test program; When the magnetic bearing engages in one or more directions and the rotor scrapes or gets stuck, the microcontroller will issue an alarm on the screen and mark the corresponding magnetic levitation motor, and finally enter the error adjustment stage.

Images