WO2021189834A1 - 磁悬浮系统的检测方法、装置、存储介质和处理器 - Google Patents

磁悬浮系统的检测方法、装置、存储介质和处理器 Download PDF

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Publication number
WO2021189834A1
WO2021189834A1 PCT/CN2020/123143 CN2020123143W WO2021189834A1 WO 2021189834 A1 WO2021189834 A1 WO 2021189834A1 CN 2020123143 W CN2020123143 W CN 2020123143W WO 2021189834 A1 WO2021189834 A1 WO 2021189834A1
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Prior art keywords
current
auxiliary bearing
current threshold
bearing
motor
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Ceased
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PCT/CN2020/123143
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English (en)
French (fr)
Inventor
贺永玲
赵聪
严安顺
王凡
李旭明
朱振宇
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Publication of WO2021189834A1 publication Critical patent/WO2021189834A1/zh
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Measuring current only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation

Definitions

  • the present disclosure relates to the field of magnetic levitation technology, and in particular, to a detection method, device, storage medium, processor, and magnetic levitation compressor of a magnetic levitation system.
  • the main shaft In the magnetic levitation system, the main shaft relies on electromagnetic bearings to achieve levitation operation. When the levitation fails, the main shaft hits the electromagnetic bearing and damages the entire magnetic levitation system. In order to protect the electromagnetic bearing, the magnetic levitation system usually designs auxiliary bearings to protect it.
  • auxiliary bearings such as ball bearings, sliding bearings and other bearings that can rotate freely and smoothly.
  • the auxiliary bearing rotates with the main shaft at high speed to buffer and reduce the impact force of the main shaft to avoid damage to the magnetic levitation system.
  • the auxiliary bearing may also fail due to some reasons, unable to rotate freely and smoothly, and the auxiliary bearing is stuck or even stuck, which reduces the function of the auxiliary bearing or completely loses its function. This will greatly reduce the reliability of the magnetic levitation system, reduce the service life, and even cause system damage.
  • auxiliary bearing is assembled into a complex sealed magnetic levitation system, it is impossible to observe and detect the state of the auxiliary bearing.
  • the method known by the inventors of the present disclosure is to regularly carry out the disassembly, inspection and replacement of the auxiliary bearing.
  • the disassembly and inspection of the auxiliary bearing has a large amount of work and high cost, which affects the normal use of user equipment and is inefficient.
  • a detection method of a magnetic levitation system including a main shaft, a motor, an electromagnetic bearing and an auxiliary bearing, the motor works to drive the main shaft to rotate, the electromagnetic bearing and the auxiliary bearing
  • the bearings are respectively arranged on the main shaft, the radius of the electromagnetic bearing is greater than the radius of the auxiliary bearing, and the detection method includes: detecting whether the electromagnetic bearing stops working; when it is detected that the electromagnetic bearing stops working , Controlling the main shaft to rotate at a predetermined speed; detecting the working current of the motor; and determining the state of the auxiliary bearing according to the working current.
  • the magnetic levitation system further includes a bearing controller and a motor controller; the step of controlling the spindle to rotate at a predetermined speed includes: in the case of detecting that the electromagnetic bearing stops working, the bearing The controller sends a detection instruction to the motor controller; and the motor controller controls the operating current of the motor according to the detection instruction so that the main shaft rotates at the predetermined rotation speed.
  • the step of determining the state of the auxiliary bearing according to the operating current includes: comparing the operating current and the current threshold of the motor to obtain a comparison result; and determining the auxiliary bearing according to the comparison result status.
  • the current threshold includes a first current threshold and a second current threshold; the step of comparing the operating current with the current threshold to obtain a comparison result includes: comparing the operating current with the first current Threshold value to obtain a first comparison result; and comparing the operating current and the second current threshold value to obtain a second comparison result.
  • the step of determining the state of the auxiliary bearing according to the comparison result includes: when the first comparison result is that the operating current is less than or equal to the first current threshold and the second current threshold When the comparison result is that the operating current is less than the second current threshold, it is determined that the state of the auxiliary bearing is good; when the first comparison result is that the operating current is greater than the first current threshold and the When the second comparison result is that the operating current is less than or equal to the second current threshold, it is determined that the state of the auxiliary bearing is stuck; and when the first comparison result is that the operating current is greater than the first If the current threshold is current and the second comparison result is that the operating current is greater than the second current threshold, it is determined that the state of the auxiliary bearing is stuck.
  • the detection method further includes: sending an early warning signal when the state of the auxiliary bearing is stuck; and sending an alarm signal when the state of the auxiliary bearing is stuck.
  • the magnetic levitation system further includes a comparison circuit; the step of comparing the operating current and the current threshold of the motor to obtain a comparison result includes: using the comparison circuit to compare the operating current and the current threshold To get the comparison result.
  • the comparison circuit includes a first comparator and a second comparator, and the current threshold includes a first current threshold and a second current threshold; the comparison circuit is used to compare the operating current and the current Threshold value to obtain the comparison result includes: the first comparator compares the operating current with the first current threshold value to output the first comparison result; and the second comparator compares the operating current It is compared with the second current threshold to output a second comparison result.
  • a detection device for a magnetic levitation system includes a main shaft, a motor, an electromagnetic bearing, and an auxiliary bearing.
  • the motor works to drive the main shaft to rotate, the electromagnetic bearing and the
  • the auxiliary bearings are respectively arranged on the main shaft, the radius of the electromagnetic bearing is greater than the radius of the auxiliary bearing
  • the detection device includes: a first control unit for controlling the electromagnetic bearing to stop working so that the main shaft On the auxiliary bearing; a second control unit for controlling the spindle to rotate at a predetermined speed; a detecting unit for detecting the working current of the motor; and a determining unit for determining the working current according to the working current State the state of the auxiliary bearing.
  • the second control unit includes: a bearing controller, configured to send a detection instruction to the motor controller when the electromagnetic bearing is detected to stop working;
  • the detection instruction controls the operating current of the motor so that the main shaft rotates at the predetermined rotation speed.
  • the determining unit includes: a comparison subunit for comparing the operating current with a current threshold of the motor to obtain a comparison result; and a determining subunit for determining the operating current according to the comparison result The state of the auxiliary bearing.
  • the comparison subunit includes a comparison circuit configured to compare the operating current and the current threshold to obtain the comparison result.
  • the current threshold includes a first current threshold and a second current threshold
  • the comparison subunit includes: a first comparator for comparing the operating current with the first current threshold to Outputting a first comparison electrical signal; and a second comparator for comparing the operating current with the second current threshold to output a second comparison electrical signal.
  • a non-transitory storage medium includes a stored program, wherein the program executes any one of the detection methods.
  • a processor configured to run a program, wherein any one of the detection methods is executed when the program is running.
  • a magnetic levitation compressor including: one or more processors, a memory, and one or more programs, wherein one or more of the programs are stored in the memory, And it is configured to be executed by one or more of the processors, and one or more of the programs include any one of the detection methods.
  • a magnetic levitation compressor including a detection device of a magnetic levitation system, and the detection device is any one of the detection devices.
  • Figure 1 shows a schematic structural diagram of a magnetic levitation system according to some embodiments of the present disclosure
  • Fig. 2 shows a flowchart of a detection method of a magnetic levitation system according to some embodiments of the present disclosure
  • Figure 3 shows a side sectional view of the main shaft and auxiliary bearings in Figure 1;
  • Figure 4 shows a structural diagram of a magnetic levitation system according to some embodiments of the present disclosure.
  • Fig. 5 shows a schematic diagram of a detection device of a magnetic levitation system according to some embodiments of the present disclosure.
  • One technical problem solved by the present disclosure is that the detection efficiency of the auxiliary bearing state in the technology known to the inventor of the present disclosure is relatively low.
  • a detection method of a magnetic levitation system is provided.
  • the above-mentioned magnetic levitation system includes a main shaft 10, a motor 20, an electromagnetic bearing 30 and an auxiliary bearing 40.
  • the motor 20 operates to drive the spindle 10 to rotate.
  • the electromagnetic bearing 30 and the auxiliary bearing 40 are respectively provided on the main shaft 10.
  • the radius of the electromagnetic bearing 30 is larger than the radius of the auxiliary bearing 40.
  • Fig. 2 is a flowchart of a detection method of a magnetic levitation system according to an embodiment of the present disclosure. As shown in Fig. 2, the method includes steps S101 to S104.
  • step S101 it is detected whether the above-mentioned electromagnetic bearing 30 stops working.
  • step S102 when it is detected that the electromagnetic bearing 30 stops working, the main shaft 10 is controlled to rotate at a predetermined speed.
  • step S103 the operating current of the above-mentioned motor 20 is detected.
  • step S104 the state of the auxiliary bearing 40 is determined according to the operating current.
  • the detection method firstly detect whether the electromagnetic bearing stops working to determine whether the main shaft falls on the auxiliary bearing; then, in the case of detecting that the electromagnetic bearing stops working, control the main shaft to rotate at a predetermined speed, that is, control the main shaft on the auxiliary bearing The upper part rotates at a predetermined speed; then the working current of the motor is detected; finally, the state of the auxiliary bearing is determined according to the working current. Since the auxiliary bearing is stuck or jammed, the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the size of the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing.
  • the above-mentioned motor 20 includes a motor rotor 21 and a motor stator 22.
  • the motor rotor 21 is sleeved on the main shaft 10.
  • the motor rotor 21, the electromagnetic bearing 30 and the auxiliary bearing 40 are spaced apart in the axial direction of the main shaft 10.
  • the motor rotor 21 passes through the stator bore of the motor stator 22.
  • the motor 20 operates to drive the spindle 10 to rotate.
  • the specific working process is as follows.
  • the motor stator 22 is powered on to drive the motor rotor 21 to rotate, and the motor rotor 21 rotates to drive the spindle 10 to rotate.
  • the above-mentioned magnetic levitation system further includes a bearing controller 50 and a motor controller 60.
  • the step of controlling the main shaft 10 to rotate at a predetermined speed includes: in the case of detecting that the electromagnetic bearing 30 stops working, the bearing controller 50 sends a detection instruction to the motor controller 60; and the motor controller 60 according to the above The detection command controls the operating current of the motor 20 so that the main shaft 10 rotates at the predetermined rotation speed.
  • the bearing controller sends a detection instruction to the motor controller, and the motor controller controls the working current of the motor to make the main shaft rotate at a predetermined speed so that To detect the working current of the motor to determine the state of the auxiliary bearing.
  • the auxiliary bearing state detection can be performed.
  • the status detection can be checked regularly, for example, once every six months or once a year; it can also be checked under certain circumstances, for example, after a failure of the magnetic levitation system.
  • the step of determining the state of the auxiliary bearing according to the working current includes: comparing the working current with the current threshold of the motor to obtain a comparison result; and determining the state of the auxiliary bearing according to the comparison result.
  • the auxiliary bearing can be determined state.
  • those skilled in the art can select an appropriate current threshold of the motor according to the actual situation.
  • the foregoing current threshold includes a first current threshold and a second current threshold.
  • the step of comparing the operating current and the current threshold of the motor to obtain a comparison result includes: comparing the operating current and the first current threshold to obtain a first comparison result; and comparing the operating current and the second current threshold to obtain a second comparison result.
  • the operating current is compared with the first current threshold and the second current threshold, and the first comparison result and the second comparison result are obtained respectively, so as to determine the current range corresponding to the operating current, and then determine the corresponding current range according to the current range corresponding to the operating current.
  • the state of the auxiliary bearing The above-mentioned first current threshold and the second current threshold are both current thresholds of the motor.
  • the first current threshold is 30 amperes.
  • the second current threshold is 100 amperes.
  • the step of determining the state of the auxiliary bearing based on the comparison result includes: when the first comparison result is that the operating current is less than or equal to the first current threshold, and the second comparison result is that the operating current is less than In the case of the second current threshold, it is determined that the condition of the auxiliary bearing is good; the first comparison result is that the operating current is greater than the first current threshold and the second comparison result is that the operating current is less than or equal to the second current In the case of a threshold value, it is determined that the state of the auxiliary bearing is stuck; and when the first comparison result is that the operating current is greater than the first current threshold value and the second comparison result is that the operating current is greater than the second current threshold value Next, make sure that the state of the above-mentioned auxiliary bearing is stuck.
  • the above three current ranges correspond to the states of the three auxiliary bearings, and the state of the auxiliary bearings can be determined by determining the current range corresponding to the operating current.
  • Those skilled in the art can select the appropriate first current threshold and second current threshold according to actual conditions to further ensure the accuracy of the detection result.
  • the above detection method further includes: sending an early warning signal when the state of the auxiliary bearing is stuck; and sending an alarm signal when the state of the auxiliary bearing is stuck.
  • the magnetic levitation system further includes a condition monitoring device 90.
  • the state monitoring device 90 can display the state of the auxiliary bearing, and when the state of the auxiliary bearing 40 is stuck, the state monitoring device 90 sends out an early warning signal, and when the state of the auxiliary bearing 40 is stuck, the state monitoring device 90 Send out an alarm signal.
  • the above-mentioned magnetic levitation system further includes a comparison circuit 70.
  • the step of comparing the operating current a 0 with the current threshold of the motor to obtain the comparison result includes: comparing the operating current a 0 with the current threshold of the motor using a comparison circuit to obtain the comparison result.
  • the magnetic levitation system further includes a current detection device 80.
  • the current detection device 80 detects the operating current a 0 of the motor 20 and inputs the detection signal to the comparison circuit 70.
  • the comparison circuit 70 compares the operating current a 0 with the current threshold of the motor to obtain a comparison result.
  • the aforementioned comparison circuit 70 includes a first comparator 71 and a second comparator 72.
  • the above-mentioned current threshold includes a first current threshold a 1 and a second current threshold a 2 .
  • the step of using the comparison circuit 70 to compare the operating current a 0 and the current threshold to obtain the comparison result includes: the first comparator 71 compares the operating current a 0 with the first current threshold a 1 to output a first comparison Result; and the second comparator 72 compares the operating current a 0 with the second current threshold a 2 to output a second comparison result.
  • the detection signal of the current detection device 80 is input to the first comparator 71 and the second comparator 72, the first comparator 71 outputs the first comparison result, and the second comparator 72 outputs the second comparison result. result and the second comparison result to determine the operating current corresponding to the current range of a 0, to determine a corresponding auxiliary bearing state operating current according to a current range corresponding to a 0.
  • the first current threshold a 1 and the second current threshold a 2 are both current thresholds of the motor.
  • the step of comparing the working current with the first current threshold by the first comparator to output a first comparison result includes: determining when the working current is less than or equal to the first current threshold The first comparison result is a low level; and when the operating current is greater than the first current threshold, it is determined that the first comparison result is a high level. Specifically, when the working current is less than or equal to the first current threshold, the first comparator outputs a low level, and when the working current is greater than the first current threshold, the first comparator outputs a high level, so that according to The outputted first comparison result determines the magnitude relationship between the working current and the first current threshold.
  • the step of comparing the operating current with the second current threshold by the second comparator to output a second comparison result includes: when the operating current is less than or equal to the second current threshold, determining The second comparison result is a low level; and when the operating current is greater than the second current threshold, it is determined that the second comparison result is a high level. Specifically, when the working current is less than or equal to the second current threshold, the second comparator outputs a low level, and when the working current is greater than the second current threshold, the second comparator outputs a high level, so that according to The output second comparison result determines the magnitude relationship between the operating current and the second current threshold.
  • the step of determining the state of the auxiliary bearing according to the comparison result includes: in the case where the first comparison result and the second comparison result are both low, determining that the state of the auxiliary bearing is Good; when the first comparison result is high and the second comparison result is low, it is determined that the state of the auxiliary bearing is stuck; the first comparison result and the second comparison result are both In the case of high level, it is determined that the state of the above-mentioned auxiliary bearing is stuck.
  • the first comparison result and the second comparison result are both low, that is, the operating current is less than or equal to the first current threshold, it is determined that the state of the auxiliary bearing is good, and the first comparison result is high and
  • the second comparison result is low, that is, the working current is greater than the first current threshold and less than or equal to the second current threshold, it is determined that the state of the auxiliary bearing is stuck, and the first comparison result and the second comparison result are both high
  • level that is, the operating current is greater than the second current threshold, it is determined that the state of the auxiliary bearing is stuck.
  • first current threshold and the second current threshold are pre-measured according to the device model of the magnetic levitation system.
  • the range of the first current threshold and the second current threshold is different for different motor power and shaft weight.
  • Those skilled in the art can determine the appropriate first current threshold and the second current threshold according to the actual situation, so as to further ensure the accuracy of the state detection of the auxiliary bearing.
  • the above-mentioned predetermined speed range is also different. Those skilled in the art can determine a suitable predetermined rotation speed according to actual conditions, for example, 5r/s to 10r/s. Setting the predetermined rotation speed within the above range can prevent the auxiliary bearing from jamming due to excessive rotation speed and causing mechanical damage, and it can also prevent the rotation speed from being too low, resulting in insignificant changes in current and inaccurate detection.
  • the embodiment of the present disclosure also provides a detection device of the magnetic levitation system.
  • the above-mentioned magnetic levitation system includes a main shaft 10, a motor 20, an electromagnetic bearing 30 and an auxiliary bearing 40.
  • the motor 20 operates to drive the spindle 10 to rotate.
  • the electromagnetic bearing 30 and the auxiliary bearing 40 are respectively provided on the main shaft 10.
  • the radius of the electromagnetic bearing 30 is larger than the radius of the auxiliary bearing 40.
  • the detection device of the magnetic levitation system in the embodiment of the present disclosure may be used to execute the detection method of the magnetic levitation system provided in the embodiment of the present disclosure.
  • the detection device of the magnetic levitation system provided by the embodiment of the present disclosure will be introduced below.
  • Fig. 5 is a schematic diagram of a detection device of a magnetic levitation system according to an embodiment of the present disclosure.
  • the above detection device includes a first control unit 100, a second control unit 200, a detection unit 300, and a determination unit 400.
  • the first control unit 100 is used to control the electromagnetic bearing to stop working, so that the main shaft falls on the auxiliary bearing.
  • the second control unit 200 is used to control the above-mentioned spindle to rotate at a predetermined speed.
  • the detection unit 300 is used to detect the working current of the above-mentioned motor
  • the determining unit 400 is used to determine the state of the auxiliary bearing according to the operating current.
  • the first control unit detects whether the electromagnetic bearing stops working to determine whether the main shaft falls on the auxiliary bearing, and the second control unit controls the main shaft to rotate at a predetermined speed when detecting that the electromagnetic bearing stops working, That is, the main shaft is controlled to rotate at a predetermined speed on the auxiliary bearing, the detection unit detects the working current of the motor, and the determination unit determines the state of the auxiliary bearing according to the working current. Since the auxiliary bearing is stuck or jammed, the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the size of the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing.
  • the above-mentioned motor 20 includes a motor rotor 21 and a motor stator 22.
  • the motor rotor 21 is sleeved on the main shaft 10.
  • the motor rotor 21, the electromagnetic bearing 30 and the auxiliary bearing 40 are spaced apart in the axial direction of the main shaft 10.
  • the motor rotor 21 passes through the stator bore of the motor stator 22.
  • the motor 20 operates to drive the spindle 10 to rotate.
  • the specific working process is as follows.
  • the motor stator 22 is powered on to drive the motor rotor 21 to rotate, and the motor rotor 21 rotates to drive the spindle 10 to rotate.
  • the above-mentioned second control unit includes a bearing controller 50 and a motor controller 60.
  • the bearing controller 50 is used to send a detection command to the motor controller 60 when it is detected that the electromagnetic bearing 30 stops working.
  • the motor controller 60 is configured to control the operating current a 0 of the motor 20 according to the detection instruction, so that the main shaft 10 rotates at the predetermined speed.
  • the bearing controller detects that the electromagnetic bearing stops working, it determines that the main shaft falls on the auxiliary bearing, and then sends a detection instruction to the motor controller; the motor controller controls the working current a 0 of the motor to make the main shaft rotate at a predetermined speed , In order to detect the working current a 0 of the motor to determine the state of the auxiliary bearing.
  • the auxiliary bearing status can be detected, for example, after the magnetic levitation system is shut down, or the magnetic levitation system Before starting. More specifically, the status detection can be performed on a regular basis, for example, once every six months or once a year, or can be performed under specific circumstances, for example, after a magnetic levitation system fails.
  • the above determination unit includes a comparison subunit and a determination subunit.
  • the comparison subunit is used to compare the working current with the current threshold of the motor to obtain a comparison result.
  • the determination subunit is used to determine the state of the auxiliary bearing according to the comparison result. Specifically, because the auxiliary bearing is stuck or stuck, the friction force of the spindle rotation will increase, which will lead to the increase of the working current of the motor. According to the comparison result of the working current of the motor and the current threshold of the motor, the auxiliary bearing can be determined state. In addition, those skilled in the art can select an appropriate current threshold of the motor according to the actual situation.
  • the determination subunit may not exist, and the technician can determine the state of the corresponding auxiliary bearing according to the comparison result of the comparison subunit.
  • the above-mentioned determining subunit may also be some indirect determining devices.
  • the determining subunit is implemented by a hardware circuit.
  • the determining subunit may include several indicator lights of different colors. Different comparison results will trigger different indicator lights. In this way, the staff can determine the status of the auxiliary bearing through the brightness of different indicator lights.
  • the following deterministic modules which are optional and can be implemented by hardware circuits.
  • the foregoing current threshold includes a first current threshold and a second current threshold.
  • the above comparison subunit includes a first comparison module and a second comparison module.
  • the first comparison module is used to compare the operating current and the first current threshold to obtain a first comparison result.
  • the second comparison module is used to compare the operating current and the second current threshold to obtain a second comparison result.
  • the operating current is compared with the first current threshold and the second current threshold, and the first comparison result and the second comparison result are obtained respectively, so as to determine the current range corresponding to the operating current, and then determine the corresponding current range according to the current range corresponding to the operating current.
  • the state of the auxiliary bearing The above-mentioned first current threshold and the second current threshold are both current thresholds of the motor.
  • the above-mentioned determining subunit includes a first determining module, a second determining module, and a third determining module.
  • the first determining module is configured to determine the state of the auxiliary bearing when the first comparison result is that the operating current is less than or equal to the first current threshold and the second comparison result is that the operating current is less than the second current threshold.
  • the second determining module is configured to determine the state of the auxiliary bearing when the first comparison result is that the operating current is greater than the first current threshold and the second comparison result is that the operating current is less than or equal to the second current threshold.
  • the third determining module is configured to determine that the state of the auxiliary bearing is when the first comparison result is that the operating current is greater than the first current threshold and the second comparison result is that the operating current is greater than the second current threshold. Stuck.
  • the above three current ranges correspond to the states of the three auxiliary bearings, and the state of the auxiliary bearings can be determined by determining the current range corresponding to the operating current.
  • Those skilled in the art can select the appropriate first current threshold and second current threshold according to actual conditions to further ensure the accuracy of the detection result.
  • the above detection device further includes a prompt unit.
  • the above-mentioned prompting unit includes a first prompting subunit and a second prompting subunit.
  • the first prompting subunit is used to send an early warning signal when the state of the auxiliary bearing is stuck.
  • the second prompting subunit is used to send an alarm signal when the state of the auxiliary bearing is stuck.
  • the magnetic levitation system further includes a state monitoring device 90.
  • the state monitoring device 90 can display the state of the auxiliary bearing, and when the state of the auxiliary bearing 40 is stuck, the state monitoring device 90 sends out an early warning signal, and when the state of the auxiliary bearing 40 is stuck, the state monitoring device 90 Send out an alarm signal.
  • the aforementioned comparison subunit includes a comparison circuit 70.
  • the comparison circuit 70 is used to compare the operating current a 0 with the current threshold of the motor to obtain the comparison result.
  • the magnetic levitation system further includes a current detection device 80.
  • the current detection device 80 detects the working current a 0 of the motor 20 and inputs the detection signal to the comparison circuit 70.
  • the comparison circuit 70 compares the working current a 0 with the current threshold of the motor to obtain a comparison result.
  • the aforementioned comparison circuit 70 includes a first comparator 71 and a second comparator 72.
  • the above-mentioned current threshold includes a first current threshold a 1 and a second current threshold a 2 .
  • the first comparator 71 is used to compare the operating current with the first current threshold a 1 to output a first comparison electrical signal.
  • the second comparator 72 is used to compare the operating current a 0 with the second current threshold a 2 to output a second comparison electrical signal.
  • the detection signal of the current detection device 80 is input to the first comparator 71 and the second comparator 72, the first comparator 71 outputs a first comparative electric signal, and the second comparator 72 outputs a second comparative electric signal, according to the first comparator 71 and the second comparator 72.
  • a comparator comparing a second electrical signal to an electrical signal and determining the operating current corresponding to the current range of a 0, to determine a corresponding auxiliary bearing state operating current according to a current range corresponding to a 0.
  • the first current threshold a 1 and the second current threshold a 2 are both current thresholds of the motor.
  • the first comparison electrical signal is at a low level; when the working current is greater than the first current threshold, the second comparison is determined The electrical signal is high. That is to say, when the working current is less than or equal to the first current threshold, the first comparator outputs a low level, and when the working current is greater than the first current threshold, the first comparator outputs a high level, so The magnitude relationship between the working current and the first current threshold is determined according to the output first comparison result.
  • the second comparison electrical signal is determined to be a low level; in the case where the operating current is greater than the second current threshold, it is determined that the second The comparison electrical signal is at a high level.
  • the second comparator outputs a low level, and in the case where the operating current is greater than the second current threshold, the second comparator outputs a high level, so The magnitude relationship between the operating current and the second current threshold is determined according to the output second comparison result.
  • the aforementioned determining subunit includes a fourth determining module, a fifth determining module, and a sixth determining module.
  • the fourth determining module is configured to determine that the state of the auxiliary bearing is good when the first comparison result and the second comparison electrical signal are both low.
  • the fifth determining module is configured to determine that the state of the auxiliary bearing is stuck when the first comparison electrical signal is at a high level and the second comparison electrical signal is at a low level.
  • the sixth determining module is configured to determine that the state of the auxiliary bearing is stuck when the first comparison electrical signal and the second comparison electrical signal are both at a high level.
  • the first comparison result and the second comparison electrical signal are both low, that is, the operating current is less than or equal to the first current threshold, it is determined that the state of the auxiliary bearing is good, and the first comparison electrical signal is high.
  • the second comparison electrical signal is at a low level, that is, the working current is greater than the first current threshold and less than or equal to the second current threshold, it is determined that the state of the auxiliary bearing is stuck, and the first comparison electrical signal and the second comparison
  • the electrical signals are all high, that is, the working current is greater than the second current threshold, it is determined that the state of the auxiliary bearing is stuck.
  • first current threshold and the second current threshold are pre-measured according to the device model of the magnetic levitation system.
  • the range of the first current threshold and the second current threshold is different for different motor power and shaft weight.
  • Those skilled in the art can determine the appropriate first current threshold and the second current threshold according to the actual situation, so as to further ensure the accuracy of the state detection of the auxiliary bearing.
  • the above-mentioned predetermined speed range is also different. Those skilled in the art can determine a suitable predetermined rotation speed according to actual conditions, for example, 5r/s to 10r/s. Setting the predetermined rotation speed within the above range can prevent the auxiliary bearing from jamming due to excessive rotation speed and causing mechanical damage, and it can also prevent the rotation speed from being too low, resulting in insignificant changes in current and inaccurate detection.
  • the embodiment of the present disclosure also provides a magnetic levitation compressor, including: one or more processors, a memory, and one or more programs, wherein one or more of the above-mentioned programs are stored in the above-mentioned memory and configured to be One or more of the above-mentioned processors are executed, and one or more of the above-mentioned programs are used to execute any one of the above-mentioned detection methods.
  • a magnetic levitation compressor including: one or more processors, a memory, and one or more programs, wherein one or more of the above-mentioned programs are stored in the above-mentioned memory and configured to be One or more of the above-mentioned processors are executed, and one or more of the above-mentioned programs are used to execute any one of the above-mentioned detection methods.
  • the main shaft is controlled to rotate at a predetermined speed. That is, the main shaft is controlled to rotate at a predetermined speed on the auxiliary bearing, and then the working current of the motor is detected, and finally the state of the auxiliary bearing is determined according to the working current. Since the auxiliary bearing is stuck or jammed, the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the size of the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing.
  • the embodiment of the present disclosure also provides a magnetic levitation compressor including a detection device of the magnetic levitation system.
  • the above-mentioned detection device is any one of the above-mentioned detection devices.
  • the magnetic levitation compressor includes a detection device of the magnetic levitation system.
  • the first control unit of the detection device detects whether the electromagnetic bearing stops working to determine whether the main shaft falls on the auxiliary bearing.
  • the second control unit of the detection device detects the electromagnetic bearing.
  • the main shaft is controlled to rotate at a predetermined speed, that is, the main shaft is controlled to rotate at a predetermined speed on the auxiliary bearing.
  • the detection unit detects the working current of the motor, and the determination unit of the detection device determines the state of the auxiliary bearing according to the working current.
  • the auxiliary bearing Since the auxiliary bearing is stuck or jammed, the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the size of the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing. In this way, it is possible to detect the status of the auxiliary bearing in real time, perform accurate maintenance, and reduce the maintenance and maintenance cost of the auxiliary bearing. And this can also try to avoid the problem that the life of the magnetic levitation system is reduced or even damaged due to the failure to replace the failed auxiliary bearing in time, thereby indirectly improving the life and reliability of the magnetic levitation system.
  • the above detection device includes a processor and a memory.
  • the above-mentioned first control unit, second control unit, detection unit, and determination unit are all stored in the memory as program units.
  • the processor executes the above program unit stored in the memory to realize the corresponding function.
  • the processor contains the kernel, and the kernel calls the corresponding program unit from the memory.
  • the kernel calls the corresponding program unit from the memory.
  • one or more cores can be provided in the processor.
  • the memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM).
  • RAM random access memory
  • ROM read-only memory
  • flash RAM flash memory
  • the memory includes at least one memory chip.
  • the embodiment of the present disclosure provides a non-transitory storage medium on which a program is stored, and when the program is executed by a processor, the foregoing detection device is realized.
  • the embodiment of the present disclosure provides a processor, and the above-mentioned processor is used to run a program, wherein the above-mentioned detection device is executed when the above-mentioned program is running.
  • the embodiment of the present disclosure provides a device that includes a processor, a memory, and a program stored on the memory and capable of running on the processor, and the processor implements at least the following steps S101 to S104 when the program is executed.
  • step S101 it is detected whether the above-mentioned electromagnetic bearing 30 stops working.
  • step S102 when it is detected that the electromagnetic bearing 30 stops working, the main shaft 10 is controlled to rotate at a predetermined speed.
  • step S103 the operating current of the above-mentioned motor 20 is detected.
  • step S104 the state of the auxiliary bearing 40 is determined according to the operating current.
  • the equipment in this article can be a server, a PC (Personal Computer), a PAD (that is, a tablet computer), a mobile phone, and so on.
  • PC Personal Computer
  • PAD that is, a tablet computer
  • mobile phone and so on.
  • the present disclosure also provides a computer program product, which when executed on a data processing device, is suitable for executing a program that initializes at least the following method steps S101 to S104.
  • step S101 it is detected whether the above-mentioned electromagnetic bearing 30 stops working.
  • step S102 when it is detected that the electromagnetic bearing 30 stops working, the main shaft 10 is controlled to rotate at a predetermined speed.
  • step S103 the operating current of the above-mentioned motor 20 is detected.
  • step S104 the state of the auxiliary bearing 40 is determined according to the operating current.
  • the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • the computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
  • processors CPUs
  • input/output interfaces network interfaces
  • memory volatile and non-volatile memory
  • the memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM).
  • RAM random access memory
  • ROM read-only memory
  • flash RAM flash memory
  • Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology.
  • the information can be computer-readable instructions, data structures, program modules, or other data.
  • Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical storage, Magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.
  • the detection method of the present disclosure firstly, it is detected whether the above-mentioned electromagnetic bearing stops working to determine whether the main shaft falls on the auxiliary bearing, and then when the above-mentioned electromagnetic bearing stops working, the main shaft is controlled to rotate at a predetermined speed, namely Control the main shaft to rotate at a predetermined speed on the auxiliary bearing, then detect the working current of the motor, and finally determine the state of the auxiliary bearing according to the working current. Since the auxiliary bearing is stuck or jammed, the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the size of the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing.
  • the first control unit detects whether the electromagnetic bearing stops working to determine whether the main shaft falls on the auxiliary bearing
  • the second control unit controls the main shaft when detecting that the electromagnetic bearing stops working Rotating at a predetermined speed, that is, controlling the main shaft to rotate at a predetermined speed on the auxiliary bearing
  • the detecting unit detects the working current of the motor
  • the determining unit determines the state of the auxiliary bearing according to the working current. Since the auxiliary bearing is stuck or jammed, the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the size of the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing.
  • the magnetic levitation compressor of the present disclosure during the execution of the program, firstly detect whether the electromagnetic bearing stops working to determine whether the main shaft falls on the auxiliary bearing, and then control the main shaft when it is detected that the electromagnetic bearing stops working Rotate at a predetermined speed, that is, control the main shaft to rotate at a predetermined speed on the auxiliary bearing, then detect the working current of the motor, and finally determine the state of the auxiliary bearing according to the working current.
  • the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing.
  • the magnetic levitation compressor of the present disclosure includes a detection device of the magnetic levitation system.
  • the first control unit of the detection device detects whether the electromagnetic bearing stops working to determine whether the main shaft falls on the auxiliary bearing.
  • the second control unit of the detection device In the case of detecting that the above electromagnetic bearing stops working, control the spindle to rotate at a predetermined speed, that is, control the spindle to rotate at a predetermined speed on the auxiliary bearing, the detection unit detects the working current of the motor, and the determination unit of the detection device determines the auxiliary bearing according to the working current status.
  • the auxiliary bearing Since the auxiliary bearing is stuck or jammed, the working current of the motor will increase, so the state of the auxiliary bearing is determined according to the size of the working current of the motor, thereby improving the efficiency of detecting the state of the auxiliary bearing. In this way, real-time detection of the auxiliary bearing status and accurate maintenance can be realized, and the maintenance and maintenance cost of the auxiliary bearing can be reduced. Moreover, this can also avoid the problem of reduced or even damage to the life of the maglev system due to failure to replace the failed auxiliary bearings in time, thereby indirectly improving the life and reliability of the maglev system.

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Abstract

一种磁悬浮系统的检测方法、装置、存储介质、处理器和磁悬浮压缩机。磁悬浮系统包括主轴（10）、电机（20）、电磁轴承（30）和辅助轴承（40），电机（20）工作驱动主轴（10）旋转，电磁轴承（30）和辅助轴承（40）分别设置在主轴（10）上，电磁轴承（30）的半径大于辅助轴承（40）的半径。检测方法包括：检测电磁轴承是否停止工作（S101）；在检测到电磁轴承停止工作的情况下，控制主轴以预定转速旋转（S102）；检测电机的工作电流（S103）；和根据工作电流确定辅助轴承的状态（S104）。由于辅助轴承（40）卡顿或者卡死会导致电机（20）的工作电流增大，从而可根据电机（20）的工作电流的大小确定辅助轴承（40）的状态，进而提高了辅助轴承（40）的状态检测的效率，实现实时检测辅助轴承（40）的状态，进行精确维护。

Description

磁悬浮系统的检测方法、装置、存储介质和处理器
相关申请的交叉引用
本申请是以CN申请号为202010215308.3，申请日为2020年3月24日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及磁悬浮技术领域，具体而言，涉及一种磁悬浮系统的检测方法、装置、存储介质、处理器和磁悬浮压缩机。
背景技术
在磁悬浮系统中，主轴依靠电磁轴承实现悬浮运行。当悬浮失效时主轴撞击电磁轴承造成整个磁悬浮系统损坏，为了实现对电磁轴承的保护，通常磁悬浮系统均会设计辅助轴承对其进行保护。
辅助轴承的形式有很多种，例如滚珠轴承、滑动轴承等可以自由平滑转动的轴承。当高速运行的主轴因为某种原因悬浮失效时，主轴会自由下落撞击到辅助轴承上，辅助轴承随主轴高速旋转，缓冲减小主轴撞击力，避免磁悬浮系统损坏。然而辅助轴承也可能因为一些原因导致失效，无法自由平滑转动，出现辅助轴承卡顿，甚至卡死，使辅助轴承的作用降低或彻底失去作用。这将大大降低磁悬浮系统可靠性，降低使用寿命，甚至导致系统损坏。
目前辅助轴承装配到复杂密封的磁悬浮系统后，无法观察、检测辅助轴承状态。本公开的发明人已知的做法是定期进行辅助轴承拆检、更换，而辅助轴承的拆检工程量大，费用高，影响用户设备正常使用，效率低下。
在背景技术部分中公开的以上信息只是用来加强对本文所描述技术的背景技术的理解，因此，背景技术中可能包含某些信息，这些信息对于本领域技术人员来说并未形成现有技术。
发明内容
根据本公开的一个方面，提供了一种磁悬浮系统的检测方法，所述磁悬浮系统包括主轴、电机、电磁轴承和辅助轴承，所述电机工作驱动所述主轴旋转，所述电磁轴 承和所述辅助轴承分别设置在所述主轴上，所述电磁轴承的半径大于所述辅助轴承的半径，所述检测方法包括：检测所述电磁轴承是否停止工作；在检测到所述电磁轴承停止工作的情况下，控制所述主轴以预定转速旋转；检测所述电机的工作电流；以及根据所述工作电流确定所述辅助轴承的状态。
在一些实施例中，所述磁悬浮系统还包括轴承控制器和电机控制器；所述控制所述主轴以预定转速旋转的步骤包括：在检测到所述电磁轴承停止工作的情况下，所述轴承控制器向所述电机控制器发送检测指令；以及所述电机控制器根据所述检测指令控制所述电机的工作电流，以使得所述主轴以所述预定转速旋转。
在一些实施例中，所述根据所述工作电流确定所述辅助轴承的状态的步骤包括：比较所述工作电流和电机的电流阈值以得到比较结果；以及根据所述比较结果确定所述辅助轴承的状态。
在一些实施例中，所述电流阈值包括第一电流阈值和第二电流阈值；所述比较所述工作电流和电流阈值以得到比较结果的步骤包括：比较所述工作电流和所述第一电流阈值以得到第一比较结果；以及比较所述工作电流和所述第二电流阈值以得到第二比较结果。
在一些实施例中，所述根据所述比较结果确定所述辅助轴承的状态，的步骤包括：在所述第一比较结果为所述工作电流小于等于所述第一电流阈值且所述第二比较结果为所述工作电流小于所述第二电流阈值的情况下，确定所述辅助轴承的状态为良好；在所述第一比较结果为所述工作电流大于所述第一电流阈值且所述第二比较结果为所述工作电流小于等于所述第二电流阈值的情况下，确定所述辅助轴承的状态为卡顿；以及在所述第一比较结果为所述工作电流大于所述第一电流阈值且所述第二比较结果为所述工作电流大于所述第二电流阈值的情况下，确定所述辅助轴承的状态为卡死。
在一些实施例中，所述检测方法还包括：在所述辅助轴承的状态为卡顿的情况下，发出预警信号；以及在所述辅助轴承的状态为卡死的情况下，发出报警信号。
在一些实施例中，所述磁悬浮系统还包括比较电路；所述比较所述工作电流和电机的电流阈值以得到比较结果的步骤包括：采用所述比较电路比较所述工作电流和所述电流阈值以得到所述比较结果。
在一些实施例中，所述比较电路包括第一比较器和第二比较器，所述电流阈值包括第一电流阈值和第二电流阈值；所述采用比较电路比较所述工作电流和所述电流阈值以得到所述比较结果的步骤包括：所述第一比较器将所述工作电流与所述第一电流 阈值进行比较以输出第一比较结果；以及所述第二比较器将所述工作电流与所述第二电流阈值进行比较以输出第二比较结果。
根据本公开的另一方面，提供了一种磁悬浮系统的检测装置，所述磁悬浮系统包括主轴、电机、电磁轴承和辅助轴承，所述电机工作驱动所述主轴旋转，所述电磁轴承和所述辅助轴承分别设置在所述主轴上，所述电磁轴承的半径大于所述辅助轴承的半径，所述检测装置包括：第一控制单元，用于控制所述电磁轴承停止工作，以使得所述主轴落在所述辅助轴承上；第二控制单元，用于控制所述主轴以预定转速旋转；检测单元，用于检测所述电机的工作电流；以及确定单元，用于根据所述工作电流确定所述辅助轴承的状态。
在一些实施例中，所述第二控制单元包括：轴承控制器，用于在检测到所述电磁轴承停止工作的情况下，向电机控制器发送检测指令；以及电机控制器，用于根据所述检测指令控制所述电机的工作电流，以使得所述主轴以所述预定转速旋转。
在一些实施例中，所述确定单元包括：比较子单元，用于将所述工作电流与电机的电流阈值进行比较以得到比较结果；以及确定子单元，用于根据所述比较结果确定所述辅助轴承的状态。
在一些实施例中，所述比较子单元包括比较电路，所述比较电路用于比较所述工作电流和所述电流阈值以得到所述比较结果。
在一些实施例中，所述电流阈值包括第一电流阈值和第二电流阈值，所述比较子单元包括：第一比较器，用于将所述工作电流与所述第一电流阈值进行比较以输出第一比较电信号；以及第二比较器，用于将所述工作电流与所述第二电流阈值进行比较以输出第二比较电信号。
根据本公开的再一方面，提供了一种非瞬时性存储介质，所述存储介质包括存储的程序，其中，所述程序执行任意一种所述的检测方法。
根据本公开的另一方面，提供了一种处理器，所述处理器用于运行程序，其中，所述程序运行时执行任意一种所述的检测方法。
根据本公开的又一方面，提供了一种磁悬浮压缩机，包括：一个或多个处理器、存储器以及一个或多个程序，其中，一个或多个所述程序被存储在所述存储器中，并且被配置为由一个或多个所述处理器执行，一个或多个所述程序包括用于执行任意一种所述的检测方法。
根据本公开的再一方面，提供了一种磁悬浮压缩机，包括磁悬浮系统的检测装置， 所述检测装置为任意一种所述检测装置。
附图说明
构成本公开的一部分的说明书附图用来提供对本公开的进一步理解，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1示出了根据本公开一些实施例的磁悬浮系统的结构示意图；
图2示出了根据本公开一些实施例的磁悬浮系统的检测方法的流程图；
图3示出了图1中的主轴和辅助轴承的侧剖图；
图4示出了根据本公开一些实施例的磁悬浮系统的结构图；以及
图5示出了根据本公开一些实施例的磁悬浮系统的检测装置的示意图。
其中，上述附图包括以下附图标记：
10、主轴；20、电机；21、电机转子；22、电机定子；30、电磁轴承；40、辅助轴承；50、轴承控制器；60、电机控制器；70、比较电路；71、第一比较器；72、第二比较器；80、电流检测装置；90、状态监测装置。
具体实施方式
应该指出，以下详细说明都是例示性的，旨在对本公开提供进一步的说明。除非另有指明，本文使用的所有技术和科学术语具有与本公开所属技术领域的普通技术人员通常理解的相同含义。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本公开的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
应该理解的是，当元件(诸如层、膜、区域、或衬底)描述为在另一元件“上”时，该元件可直接在该另一元件上，或者也可存在中间元件。而且，在说明书以及权利要求书中，当描述有元件“连接”至另一元件时，该元件可“直接连接”至该另一元件，或者通过第三元件“连接”至该另一元件。
本公开解决的一个技术问题是：本公开的发明人已知的技术中辅助轴承状态的检测效率比较低。
本公开的一种典型的实施方式中，提供了一种磁悬浮系统的检测方法。如图1所示， 上述磁悬浮系统包括主轴10、电机20、电磁轴承30和辅助轴承40。上述电机20工作驱动上述主轴10旋转。上述电磁轴承30和上述辅助轴承40分别设置在上述主轴10上。上述电磁轴承30的半径大于上述辅助轴承40的半径。
图2是根据本公开实施例的磁悬浮系统的检测方法的流程图，如图2所示，该方法包括步骤S101至S104。
步骤S101，检测上述电磁轴承30是否停止工作。
步骤S102，在检测到上述电磁轴承30停止工作的情况下，控制上述主轴10以预定转速旋转。
步骤S103，检测上述电机20的工作电流。
步骤S104，根据上述工作电流确定上述辅助轴承40的状态。
上述检测方法中，首先检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上；然后在检测到上述电磁轴承停止工作的情况下，控制主轴以预定转速旋转，即控制主轴在辅助轴承上以预定转速旋转；之后检测电机的工作电流；最后根据工作电流确定辅助轴承的状态。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴承的状态检测的效率。这样可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且，这还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
需要说明的是，如图1所示，上述电机20包括电机转子21和电机定子22。上述电机转子21套设在上述主轴10上。上述电机转子21、上述电磁轴承30和上述辅助轴承40在上述主轴10的轴向上间隔设置。上述电机转子21穿过上述电机定子22的定子膛。上述电机20工作驱动上述主轴10旋转。具体的工作过程如下，上述电机定子22上电工作，驱动上述电机转子21转动，上述电机转子21转动带动上述主轴10旋转。
本公开的一些实施例中，如图1所示，上述磁悬浮系统还包括轴承控制器50和电机控制器60。所述控制上述主轴10以预定转速旋转的步骤包括：在检测到上述电磁轴承30停止工作的情况下，上述轴承控制器50向上述电机控制器60发送检测指令；以及上述电机控制器60根据上述检测指令控制上述电机20的工作电流，以使得上述主轴10以上述预定转速旋转。具体地，在检测到电磁轴承停止工作的情况下，确定主轴落在辅助轴承上，然后轴承控制器向电机控制器发送检测指令，电机控制器控制电机的工作电流使得主轴以预定转速旋转，以便于检测电机的工作电流确定辅助轴承的状态。
需要说明的是，如图3所示，在检测到电磁轴承停止工作的情况下，即在主轴不起浮，落在辅助轴承上的情况下，才可以进行辅助轴承状态检测例如，在磁悬浮系统停机后，或者在磁悬浮系统启动前。更为具体地，状态检测可以定期检查，例如，半年一次或者一年一次；也可以是在特定情况下进行检测，例如，在磁悬浮系统发生故障后进行检测。
本公开的一些实施例中，根据上述工作电流确定上述辅助轴承的状态的步骤包括：比较上述工作电流和电机的电流阈值以得到比较结果；以及根据上述比较结果确定上述辅助轴承的状态。具体地，由于辅助轴承卡顿或者卡死会导致主轴旋转的摩擦力增大，进而导致电机的工作电流增大，因此，根据工作电流和电机的电流阈值的比较结果，即可确定辅助轴承的状态。另外，本领域技术人员可以根据实际情况选择合适的电机的电流阈值。
本公开的一些实施例中，上述电流阈值包括第一电流阈值和第二电流阈值。比较上述工作电流和电机的电流阈值以得到比较结果的步骤包括：比较上述工作电流和上述第一电流阈值以得到第一比较结果；以及比较上述工作电流和上述第二电流阈值以得到第二比较结果。具体地，将工作电流与第一电流阈值以及第二电流阈值进行比较，分别得到第一比较结果和第二比较结果，从而确定工作电流对应的电流范围，进而根据工作电流对应的电流范围确定相应的辅助轴承的状态。上述第一电流阈值与第二电流阈值均为电机的电流阈值。例如，第一电流阈值为30安培。例如，第二电流阈值为100安培。这两个阈值仅为举例说明，具体阈值可以根据实际压缩机型号确定。
本公开的一些实施例中，根据上述比较结果确定上述辅助轴承的状态的步骤包括：在上述第一比较结果为上述工作电流小于等于上述第一电流阈值且上述第二比较结果为上述工作电流小于上述第二电流阈值的情况下，确定上述辅助轴承的状态为良好；在上述第一比较结果为上述工作电流大于上述第一电流阈值且上述第二比较结果为上述工作电流小于等于上述第二电流阈值的情况下，确定上述辅助轴承的状态为卡顿；以及在上述第一比较结果为上述工作电流大于上述第一电流阈值且上述第二比较结果为上述工作电流大于上述第二电流阈值的情况下，确定上述辅助轴承的状态为卡死。具体地，上述三种电流范围对应三种辅助轴承的状态，确定工作电流对应的电流范围即可确定辅助轴承的状态。本领域技术人员可以根据实际情况选择合适的第一电流阈值和第二电流阈值，以进一步保证检测结果的准确性。
本公开的一些实施例中，上述检测方法还包括：在上述辅助轴承的状态为卡顿的情况下，发出预警信号；以及在上述辅助轴承的状态为卡死的情况下，发出报警信号。在一些实施例中，如图4所示，磁悬浮系统还包括状态监测装置90。状态监测装置90可以显示 辅助轴承的状态，并且在辅助轴承40的状态为卡顿的情况下，状态监测装置90发出预警信号，在辅助轴承40的状态为卡死的情况下，状态监测装置90发出报警信号。
本公开的一些实施例中，如图4所示，上述磁悬浮系统还包括比较电路70。比较上述工作电流a 0和电机的电流阈值以得到比较结果的步骤包括：采用比较电路比较上述工作电流a 0和上述电机的电流阈值以得到上述比较结果。在一些实施例中，如图4所示，磁悬浮系统还包括电流检测装置80。电流检测装置80检测电机20的工作电流a 0，并将检测信号输入比较电路70。比较电路70比较工作电流a 0和电机的电流阈值以得到比较结果。
本公开的一些实施例中，如图4所示，上述比较电路70包括第一比较器71和第二比较器72。上述电流阈值包括第一电流阈值a 1和第二电流阈值a 2。采用比较电路70比较上述工作电流a 0和上述电流阈值以得到上述比较结果的步骤包括：上述第一比较器71将上述工作电流a 0与上述第一电流阈值a 1进行比较以输出第一比较结果；以及上述第二比较器72将上述工作电流a 0与上述第二电流阈值a 2进行比较以输出第二比较结果。具体地，将电流检测装置80的检测信号输入第一比较器71和第二比较器72，第一比较器71输出第一比较结果，第二比较器72输出第二比较结果，根据第一比较结果和第二比较结果即可确定工作电流a 0对应的电流范围，进而根据工作电流a 0对应的电流范围确定相应的辅助轴承的状态。上述第一电流阈值a 1与第二电流阈值a 2均为电机的电流阈值。
本公开的一些实施例中，上述第一比较器将上述工作电流与上述第一电流阈值进行比较以输出第一比较结果的步骤包括：在上述工作电流小于等于第一电流阈值的情况下，确定上述第一比较结果为低电平；以及在上述工作电流大于上述第一电流阈值的情况下，确定上述第一比较结果为高电平。具体地，在上述工作电流小于等于第一电流阈值的情况下，第一比较器输出低电平，在上述工作电流大于第一电流阈值的情况下，第一比较器输出高电平，从而根据输出的第一比较结果确定工作电流与第一电流阈值的大小关系。
本公开的一些实施例中，上述第二比较器将上述工作电流与上述第二电流阈值进行比较以输出第二比较结果的步骤包括：在上述工作电流小于等于第二电流阈值的情况下，确定上述第二比较结果为低电平；以及在上述工作电流大于上述第二电流阈值的情况下，确定上述第二比较结果为高电平。具体地，在上述工作电流小于等于第二电流阈值的情况下，第二比较器输出低电平，在上述工作电流大于第二电流阈值的情况下，第二比较器输出高电平，从而根据输出的第二比较结果确定工作电流与第二电流阈值的大小关系。
本公开的一些实施例中，根据上述比较结果确定上述辅助轴承的状态的步骤包括：在上述第一比较结果和上述第二比较结果均为低电平的情况下，确定上述辅助轴承的状态为 良好；在上述第一比较结果为高电平且上述第二比较结果为低电平的情况下，确定上述辅助轴承的状态为卡顿；在上述第一比较结果和上述第二比较结果均为高电平的情况下，确定上述辅助轴承的状态为卡死。具体地，在第一比较结果和第二比较结果均为低电平的情况下，即工作电流小于等于第一电流阈值，确定辅助轴承的状态为良好，在第一比较结果为高电平且第二比较结果为低电平的情况下，即工作电流大于第一电流阈值且小于等于第二电流阈值，确定辅助轴承的状态为卡顿，在第一比较结果和第二比较结果均为高电平的情况下，即工作电流大于第二电流阈值，确定辅助轴承的状态为卡死。
需要说明的是，根据磁悬浮系统的设备型号预先测算出第一电流阈值和第二电流阈值，电机功率及轴的重量不同，第一电流阈值和第二电流阈值的范围也不同。本领域技术人员可以根据实际情况确定合适的第一电流阈和第二电流阈值，以进一步保证辅助轴承的状态检测的准确性。
还需要说明的是，根据磁悬浮系统的设备型号不同，上述预定转速取值范围也不同。本领域技术人员可以根据实际情况确定合适的预定转速，例如，5r/s～10r/s。将预定转速设置在上述范围内，既可以避免转速过高导致辅助轴承卡死，造成机械损伤，又进一步可以避免转速过低，导致电流变化不明显使得检测不准确。
本公开实施例还提供了一种磁悬浮系统的检测装置。如图1所示，上述磁悬浮系统包括主轴10、电机20、电磁轴承30和辅助轴承40。上述电机20工作驱动上述主轴10旋转。上述电磁轴承30和上述辅助轴承40分别设置在上述主轴10上。上述电磁轴承30的半径大于上述辅助轴承40的半径。需要说明的是，本公开实施例的磁悬浮系统的检测装置可以用于执行本公开实施例所提供的磁悬浮系统的检测方法。以下对本公开实施例提供的磁悬浮系统的检测装置进行介绍。
图5是根据本公开实施例的磁悬浮系统的检测装置的示意图。上述检测装置包括第一控制单元100、第二控制单元200、检测单元300和确定单元400。
第一控制单元100用于控制上述电磁轴承停止工作，以使得上述主轴落在上述辅助轴承上。
第二控制单元200用于控制上述主轴以预定转速旋转。
检测单元300用于检测上述电机的工作电流；。
确定单元400用于根据上述工作电流确定上述辅助轴承的状态。
上述检测装置中，第一控制单元检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上，第二控制单元在检测到上述电磁轴承停止工作的情况下，控制主轴以预定 转速旋转，即控制主轴在辅助轴承上以预定转速旋转，检测单元检测电机的工作电流，确定单元根据工作电流确定辅助轴承的状态。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴承的状态检测的效率。这可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且这还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
需要说明的是，如图1所示，上述电机20包括电机转子21和电机定子22。上述电机转子21套设在上述主轴10上。上述电机转子21、上述电磁轴承30和上述辅助轴承40在上述主轴10的轴向上间隔设置。上述电机转子21穿过上述电机定子22的定子膛。上述电机20工作驱动上述主轴10旋转。具体的工作过程如下，上述电机定子22上电工作，驱动上述电机转子21转动，上述电机转子21转动带动上述主轴10旋转。
本公开的一些实施例中，如图1和图4所示，上述第二控制单元包括轴承控制器50和电机控制器60。上述轴承控制器50用于在检测到上述电磁轴承30停止工作的情况下，向上述电机控制器60发送检测指令。上述电机控制器60用于根据上述检测指令控制上述电机20的工作电流a 0，以使得上述主轴10以上述预定转速旋转。具体地，轴承控制器在检测到电磁轴承停止工作的情况下，确定主轴落在辅助轴承上，然后向电机控制器发送检测指令；电机控制器控制电机的工作电流a 0使得主轴以预定转速旋转，以便于检测电机的工作电流a 0确定辅助轴承的状态。
需要说明的是，在检测到电磁轴承停止工作的情况下，即在主轴不起浮，落在辅助轴承上的情况下，可以进行辅助轴承状态检测，例如，在磁悬浮系统停机后，或者磁悬浮系统启动前。更为具体地，状态检测可以定期检查，例如，半年一次或者一年一次，也可以是在特定情况下进行检测，例如，磁悬浮系统发生故障后进行检测。
本公开的一些实施例中，上述确定单元包括比较子单元和确定子单元。上述比较子单元用于将上述工作电流与电机的电流阈值进行比较以得到比较结果。上述确定子单元用于根据上述比较结果确定上述辅助轴承的状态。具体地，由于辅助轴承卡顿或者卡死会导致主轴旋转的摩擦力增大，进而导致电机的工作电流增大，根据电机的工作电流和电机的电流阈值的比较结果，即可确定辅助轴承的状态。另外，本领域技术人员可以根据实际情况选择合适的电机的电流阈值。
需要说明的是，在实际的应用过程中，在一些实施例中，该确定子单元也可以没有，技术人员可以根据比较子单元的比较结果来确定对应的辅助轴承的状态。在另外一些实施 例中，上述确定子单元还可以为一些间接的确定设备。例如，该确定子单元由硬件电路来实现。例如，该确定子单元可以包括几个不同颜色的指示灯。不同的比较结果会触发不同的指示灯亮。这样工作人员可以通过不同指示灯的亮暗来确定辅助轴承的状态。以下的确定模块也是同样的道理，可有可无，并且可以通过硬件电路来实现。
本公开的一些实施例中，上述电流阈值包括第一电流阈值和第二电流阈值。上述比较子单元包括第一比较模块和第二比较模块。上述第一比较模块用于比较上述工作电流和上述第一电流阈值以得到第一比较结果。上述第二比较模块用于比较上述工作电流和上述第二电流阈值以得到第二比较结果。具体地，将工作电流与第一电流阈值以及第二电流阈值进行比较，分别得到第一比较结果和第二比较结果，从而确定工作电流对应的电流范围，进而根据工作电流对应的电流范围确定相应的辅助轴承的状态。上述第一电流阈值与第二电流阈值均为电机的电流阈值。
本公开的一些实施例中，上述确定子单元包括第一确定模块、第二确定模块和第三确定模块。上述第一确定模块用于在上述第一比较结果为上述工作电流小于等于上述第一电流阈值且上述第二比较结果为上述工作电流小于上述第二电流阈值的情况下，确定上述辅助轴承的状态为良好。上述第二确定模块用于在上述第一比较结果为上述工作电流大于上述第一电流阈值且上述第二比较结果为上述工作电流小于等于上述第二电流阈值的情况下，确定上述辅助轴承的状态为卡顿。上述第三确定模块用于在上述第一比较结果为上述工作电流大于上述第一电流阈值且上述第二比较结果为上述工作电流大于上述第二电流阈值的情况下，确定上述辅助轴承的状态为卡死。具体地，上述三种电流范围对应三种辅助轴承的状态，确定工作电流对应的电流范围即可确定辅助轴承的状态。本领域技术人员可以根据实际情况选择合适的第一电流阈值和第二电流阈值，以进一步保证检测结果的准确性。
本公开的一些实施例中，上述检测装置还包括提示单元。上述提示单元包括第一提示子单元和第二提示子单元。上述第一提示子单元用于在上述辅助轴承的状态为卡顿的情况下，发出预警信号。上述第二提示子单元用于在上述辅助轴承的状态为卡死的情况下，发出报警信号。具体地，如图4所示，磁悬浮系统还包括状态监测装置90。状态监测装置90可以显示辅助轴承的状态，并且在辅助轴承40的状态为卡顿的情况下，状态监测装置90发出预警信号，在辅助轴承40的状态为卡死的情况下，状态监测装置90发出报警信号。
本公开的一些实施例中，如图4所示，上述比较子单元包括比较电路70。上述比较电路70用于比较上述工作电流a 0和上述电机的电流阈值以得到上述比较结果。具体地，磁 悬浮系统还包括电流检测装置80。电流检测装置80检测电机20的工作电流a 0，并将检测信号输入比较电路70，比较电路70比较工作电流a 0和电机的电流阈值以得到比较结果。
本公开的一些实施例中，如图4所示，上述比较电路70包括第一比较器71和第二比较器72。上述电流阈值包括第一电流阈值a 1和第二电流阈值a 2。上述第一比较器71用于将上述工作电流与上述第一电流阈值a 1进行比较以输出第一比较电信号。上述第二比较器72用于将上述工作电流a 0与上述第二电流阈值a 2进行比较以输出第二比较电信号。具体地，将电流检测装置80的检测信号输入第一比较器71和第二比较器72，第一比较器71输出第一比较电信号，第二比较器72输出第二比较电信号，根据第一比较电信号和第二比较电信号即可确定工作电流a 0对应的电流范围，进而根据工作电流a 0对应的电流范围确定相应的辅助轴承的状态。上述第一电流阈值a 1与第二电流阈值a 2均为电机的电流阈值。
需要说明的是，在上述工作电流小于等于第一电流阈值的情况下，确定上述第一比较电信号为低电平；在上述工作电流大于上述第一电流阈值的情况下，确定上述第二比较电信号为高电平。也就是说，在上述工作电流小于等于第一电流阈值的情况下，第一比较器输出低电平，在上述工作电流大于第一电流阈值的情况下，第一比较器输出高电平，从而根据输出的第一比较结果确定工作电流与第一电流阈值的大小关系。
还需要说明的是，在上述工作电流小于等于第二电流阈值的情况下，确定上述第二比较电信号为低电平；在上述工作电流大于上述第二电流阈值的情况下，确定上述第二比较电信号为高电平。也就是说，在上述工作电流小于等于第二电流阈值的情况下，第二比较器输出低电平，在上述工作电流大于第二电流阈值的情况下，第二比较器输出高电平，从而根据输出的第二比较结果确定工作电流与第二电流阈值的大小关系。
本公开的一些实施例中，上述确定子单元包括第四确定模块、第五确定模块和第六确定模块。上述第四确定模块用于在上述第一比较结果和上述第二比较电信号均为低电平的情况下，确定上述辅助轴承的状态为良好。上述第五确定模块用于在上述第一比较电信号为高电平且上述第二比较电信号为低电平的情况下，确定上述辅助轴承的状态为卡顿。上述第六确定模块用于在上述第一比较电信号和上述第二比较电信号均为高电平的情况下，确定上述辅助轴承的状态为卡死。具体地，在第一比较结果和第二比较电信号均为低电平的情况下，即工作电流小于等于第一电流阈值，确定辅助轴承的状态为良好，在第一比较电信号为高电平且第二比较电信号为低电平的情况下，即工作电流大于第一电流阈值且小于等于第二电流阈值，确定辅助轴承的状态为卡顿，在第一比较电信号和第二比较电信号 均为高电平的情况下，即工作电流大于第二电流阈值，确定辅助轴承的状态为卡死。
需要说明的是，根据磁悬浮系统的设备型号预先测算出第一电流阈值和第二电流阈值，电机功率及轴的重量不同，第一电流阈值和第二电流阈值的范围也不同。本领域技术人员可以根据实际情况确定合适的第一电流阈值和第二电流阈值，以进一步保证辅助轴承的状态检测的准确性。
还需要说明的是，根据磁悬浮系统的设备型号不同，上述预定转速取值范围也不同。本领域技术人员可以根据实际情况确定合适的预定转速，例如，5r/s～10r/s。将预定转速设置在上述范围内，既可以避免转速过高导致辅助轴承卡死，造成机械损伤，又进一步可以避免转速过低，导致电流变化不明显使得检测不准确。
本公开实施例还提供了一种磁悬浮压缩机，包括：一个或多个处理器、存储器以及一个或多个程序，其中，一个或多个上述程序被存储在上述存储器中，并且被配置为由一个或多个上述处理器执行，一个或多个上述程序包括用于执行任意一种上述的检测方法。
上述磁悬浮压缩机中，程序执行过程中，首先检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上，然后在检测到上述电磁轴承停止工作的情况下，控制主轴以预定转速旋转，即控制主轴在辅助轴承上以预定转速旋转，之后检测电机的工作电流，最后根据工作电流确定辅助轴承的状态。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴承的状态检测的效率。这样可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且这还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
本公开实施例还提供了一种磁悬浮压缩机，包括磁悬浮系统的检测装置。上述检测装置为任意一种上述检测装置。
上述磁悬浮压缩机中，包括磁悬浮系统的检测装置，检测装置的第一控制单元检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上，检测装置的第二控制单元在检测到上述电磁轴承停止工作的情况下，控制主轴以预定转速旋转，即控制主轴在辅助轴承上以预定转速旋转，检测单元检测电机的工作电流，检测装置的确定单元根据工作电流确定辅助轴承的状态。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴承的状态检测的效率。这样可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且这还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损 坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
上述检测装置包括处理器和存储器。上述第一控制单元、第二控制单元、检测单元和确定单元等均作为程序单元存储在存储器中。由处理器执行存储在存储器中的上述程序单元来实现相应的功能。
处理器中包含内核，由内核去存储器中调取相应的程序单元。例如可以在处理器中设置一个或多个内核。
存储器可能包括计算机可读介质中的非永久性存储器，随机存取存储器(RAM)和/或非易失性内存等形式，如只读存储器(ROM)或闪存(flash RAM)。存储器包括至少一个存储芯片。
本公开实施例提供了一种非瞬时性存储介质，其上存储有程序，该程序被处理器执行时实现上述检测装置。
本公开实施例提供了一种处理器，上述处理器用于运行程序，其中，上述程序运行时执行上述检测装置。
本公开实施例提供了一种设备，设备包括处理器、存储器及存储在存储器上并可在处理器上运行的程序，处理器执行程序时实现至少以下步骤S101至S104。
步骤S101，检测上述电磁轴承30是否停止工作。
步骤S102，在检测到上述电磁轴承30停止工作的情况下，控制上述主轴10以预定转速旋转。
步骤S103，检测上述电机20的工作电流。
步骤S104，根据上述工作电流确定上述辅助轴承40的状态。
本文中的设备可以是服务器、PC(Personal Computer，个人计算机)、PAD(即平板电脑(tablet computer))、手机等。
本公开还提供了一种计算机程序产品，当在数据处理设备上执行时，适于执行初始化有至少如下方法步骤S101至S104的程序。
步骤S101，检测上述电磁轴承30是否停止工作。
步骤S102，在检测到上述电磁轴承30停止工作的情况下，控制上述主轴10以预定转速旋转。
步骤S103，检测上述电机20的工作电流。
步骤S104，根据上述工作电流确定上述辅助轴承40的状态。
本领域内的技术人员应明白，本公开的实施例可提供为方法、系统、或计算机程序产 品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
在一个典型的配置中，计算设备包括一个或多个处理器(CPU)、输入/输出接口、网络接口和内存。
存储器可能包括计算机可读介质中的非永久性存储器，随机存取存储器(RAM)和/或非易失性内存等形式，如只读存储器(ROM)或闪存(flash RAM)。存储器是计算机可读介质的示例。
计算机可读介质包括永久性和非永久性、可移动和非可移动媒体可以由任何方法或技术来实现信息存储。信息可以是计算机可读指令、数据结构、程序的模块或其他数据。计算机的存储介质的例子包括，但不限于相变内存(PRAM)、静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、其他类型的随机存取存储器(RAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、快闪记忆体或其他内存技术、只读光盘只读存储器(CD-ROM)、数字多功能光盘(DVD)或其他光学存储、磁盒式磁带，磁带磁磁盘存 储或其他磁性存储设备或任何其他非传输介质，可用于存储可以被计算设备访问的信息。按照本文中的界定，计算机可读介质不包括暂存电脑可读媒体(transitory media)，如调制的数据信号和载波。
还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括要素的过程、方法、商品或者设备中还存在另外的相同要素。
从以上的描述中，可以看出，本公开上述的实施例实现了如下技术效果。
1)、本公开的检测方法中，首先检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上，然后在检测到上述电磁轴承停止工作的情况下，控制主轴以预定转速旋转，即控制主轴在辅助轴承上以预定转速旋转，之后检测电机的工作电流，最后根据工作电流确定辅助轴承的状态。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴承的状态检测的效率。这样可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且这样还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
2)、本公开的检测装置中，第一控制单元检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上，第二控制单元在检测到上述电磁轴承停止工作的情况下，控制主轴以预定转速旋转，即控制主轴在辅助轴承上以预定转速旋转，检测单元检测电机的工作电流，确定单元根据工作电流确定辅助轴承的状态，。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴承的状态检测的效率。这样可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且这样还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
3)、本公开的磁悬浮压缩机中，程序执行过程中，首先检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上，然后在检测到上述电磁轴承停止工作的情况下，控制主轴以预定转速旋转，即控制主轴在辅助轴承上以预定转速旋转，之后检测电机的工作电流，最后根据工作电流确定辅助轴承的状态。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴 承的状态检测的效率。这样可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且这样还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
4)、本公开的磁悬浮压缩机中，包括磁悬浮系统的检测装置，检测装置的第一控制单元检测上述电磁轴承是否停止工作，以确定主轴是否落在辅助轴承上，检测装置的第二控制单元在检测到上述电磁轴承停止工作的情况下，控制主轴以预定转速旋转，即控制主轴在辅助轴承上以预定转速旋转，检测单元检测电机的工作电流，检测装置的确定单元根据工作电流确定辅助轴承的状态。由于辅助轴承卡顿或者卡死会导致电机的工作电流增大，从而根据电机的工作电流的大小确定辅助轴承的状态，进而提高了辅助轴承的状态检测的效率。这样可以实现实时检测辅助轴承状态，进行精确维护，减小了辅助轴承的检修和维护成本。而且这样还可以尽量避免因未及时更换失效的辅助轴承而导致磁悬浮系统寿命降低甚至损坏的问题，从而间接提高了磁悬浮系统寿命及可靠性。
以上描述了本公开的一些实施例，这些实施例并不用于限制本公开。对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (17)

  1. 一种磁悬浮系统的检测方法，其中，所述磁悬浮系统包括主轴、电机、电磁轴承和辅助轴承，所述电机工作驱动所述主轴旋转，所述电磁轴承和所述辅助轴承分别设置在所述主轴上，所述电磁轴承的半径大于所述辅助轴承的半径，所述检测方法包括：
    检测所述电磁轴承是否停止工作；
    在检测到所述电磁轴承停止工作的情况下，控制所述主轴以预定转速旋转；
    检测所述电机的工作电流；以及
    根据所述工作电流确定所述辅助轴承的状态。
  2. 根据权利要求1所述的检测方法，其中，所述磁悬浮系统还包括轴承控制器和电机控制器；所述控制所述主轴以预定转速旋转的步骤包括：
    在检测到所述电磁轴承停止工作的情况下，所述轴承控制器向所述电机控制器发送检测指令；以及
    所述电机控制器根据所述检测指令控制所述电机的工作电流，以使得所述主轴以所述预定转速旋转。
  3. 根据权利要求1所述的检测方法，其中，所述根据所述工作电流确定所述辅助轴承的状态的步骤包括：
    比较所述工作电流和电机的电流阈值以得到比较结果；以及
    根据所述比较结果确定所述辅助轴承的状态。
  4. 根据权利要求3所述的检测方法，其中，所述电流阈值包括第一电流阈值和第二电流阈值；所述比较所述工作电流和电流阈值以得到比较结果的步骤包括：
    比较所述工作电流和所述第一电流阈值以得到第一比较结果；以及
    比较所述工作电流和所述第二电流阈值以得到第二比较结果。
  5. 根据权利要求4所述的检测方法，其中，所述根据所述比较结果确定所述辅助轴承的状态的步骤包括：
    在所述第一比较结果为所述工作电流小于等于所述第一电流阈值且所述第二比较结果为所述工作电流小于所述第二电流阈值的情况下，确定所述辅助轴承的状态为良好；
    在所述第一比较结果为所述工作电流大于所述第一电流阈值且所述第二比较结果为所述工作电流小于等于所述第二电流阈值的情况下，确定所述辅助轴承的状态为卡顿；以及
    在所述第一比较结果为所述工作电流大于所述第一电流阈值且所述第二比较结果为所述工作电流大于所述第二电流阈值的情况下，确定所述辅助轴承的状态为卡死。
  6. 根据权利要求5所述的检测方法，还包括：
    在所述辅助轴承的状态为卡顿的情况下，发出预警信号；以及
    在所述辅助轴承的状态为卡死的情况下，发出报警信号。
  7. 根据权利要求4所述的检测方法，其中，所述磁悬浮系统还包括比较电路；所述比较所述工作电流和电机的电流阈值以得到比较结果的步骤包括：
    采用所述比较电路比较所述工作电流和所述电流阈值以得到所述比较结果。
  8. 根据权利要求7所述的检测方法，其中，所述比较电路包括第一比较器和第二比较器，所述电流阈值包括第一电流阈值和第二电流阈值；所述采用比较电路比较所述工作电流和所述电流阈值以得到所述比较结果的步骤包括：
    所述第一比较器将所述工作电流与所述第一电流阈值进行比较以输出第一比较结果；以及
    所述第二比较器将所述工作电流与所述第二电流阈值进行比较以输出第二比较结果。
  9. 一种磁悬浮系统的检测装置，其中，所述磁悬浮系统包括主轴、电机、电磁轴承和辅助轴承，所述电机工作驱动所述主轴旋转，所述电磁轴承和所述辅助轴承分别设置在所述主轴上，所述电磁轴承的半径大于所述辅助轴承的半径，所述检测装置包括：
    第一控制单元，用于控制所述电磁轴承停止工作，以使得所述主轴落在所述辅助 轴承上；
    第二控制单元，用于控制所述主轴以预定转速旋转；
    检测单元，用于检测所述电机的工作电流；以及
    确定单元，用于根据所述工作电流确定所述辅助轴承的状态。
  10. 根据权利要求9所述的检测装置，其中，所述第二控制单元包括：
    轴承控制器，用于在检测到所述电磁轴承停止工作的情况下，向电机控制器发送检测指令；以及
    电机控制器，用于根据所述检测指令控制所述电机的工作电流，以使得所述主轴以所述预定转速旋转。
  11. 根据权利要求9所述的检测装置，其中，所述确定单元包括：
    比较子单元，用于将所述工作电流与电机的电流阈值进行比较以得到比较结果；以及
    确定子单元，用于根据所述比较结果确定所述辅助轴承的状态。
  12. 根据权利要求11所述的检测装置，其中，所述比较子单元包括比较电路，所述比较电路用于比较所述工作电流和所述电流阈值以得到所述比较结果。
  13. 根据权利要求12所述的检测装置，其中，所述电流阈值包括第一电流阈值和第二电流阈值，所述比较电路包括：
    第一比较器，用于将所述工作电流与所述第一电流阈值进行比较以输出第一比较电信号；以及
    第二比较器，用于将所述工作电流与所述第二电流阈值进行比较以输出第二比较电信号。
  14. 一种非瞬时性存储介质，其中，所述存储介质包括存储的程序，其中，所述程序执行权利要求1至8中任一项所述的检测方法。
  15. 一种处理器，其中，所述处理器用于运行程序，其中，所述程序运行时执行 权利要求1至8中任一项所述的检测方法。
  16. 一种磁悬浮压缩机，包括：一个或多个处理器、存储器以及一个或多个程序，其中，一个或多个所述程序被存储在所述存储器中，并且被配置为由一个或多个所述处理器执行，一个或多个所述程序包括用于执行权利要求1至8中任意一项所述的检测方法。
  17. 一种磁悬浮压缩机，包括磁悬浮系统的检测装置，所述检测装置为权利要求9至13中任一项所述检测装置。
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