CN113503318A - Protection method and device of magnetic suspension bearing system, medium and bearing controller - Google Patents
Protection method and device of magnetic suspension bearing system, medium and bearing controller Download PDFInfo
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- CN113503318A CN113503318A CN202110943454.2A CN202110943454A CN113503318A CN 113503318 A CN113503318 A CN 113503318A CN 202110943454 A CN202110943454 A CN 202110943454A CN 113503318 A CN113503318 A CN 113503318A
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- 239000000725 suspension Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000007667 floating Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 6
- 230000003116 impacting effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000011900 installation process Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0442—Active magnetic bearings with devices affected by abnormal, undesired or non-standard conditions such as shock-load, power outage, start-up or touchdown
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/04—Preventing damage to bearings during storage or transport thereof or when otherwise out of use
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention provides a protection method and a device of a magnetic suspension bearing system, a storage medium and a bearing controller, wherein the method comprises the following steps: determining whether a rotor of the magnetic bearing system is in an un-levitated state; when the rotor is in an unsuspended state, the forward bearing coil and the backward bearing coil of the magnetic suspension bearing system are controlled to be electrified, or the axial bearing coil of the magnetic suspension bearing system is controlled to be electrified, so that the rotor is fixed. The scheme of the invention can fix the position of the rotor and avoid the damage of the magnetic suspension compressor caused by shaking and impacting in a special environment.
Description
Technical Field
The invention relates to the field of control, in particular to a protection method, a protection device, a protection medium and a bearing controller for a magnetic suspension bearing system.
Background
Because the magnetic bearing supporting rotor has the advantages of high rotating speed, small vibration, no mechanical contact, low noise and no need of lubrication, in order to improve the reliability and safety of a system, the existing protective bearings mostly adopt angular contact ball bearings and self-lubricating protective bearings made of graphite materials. The two protective bearings can protect the rotor from safe shutdown under high-speed drop and protect the stator part of the magnetic bearing from collision. However, when transporting or installing magnetic suspension products (such as magnetic suspension compressors), the rotor shakes in the compressor, in severe cases, the rotor collides with components (such as oil blocking sleeves and comb teeth) in the compressor, so that the components loosen and are even damaged, and the air gap between the bearing and the rotor is abnormal, so that the compressor is damaged.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks of the related art, and provides a method and an apparatus for protecting a magnetic suspension bearing system, a storage medium, and a bearing controller, so as to solve the problem of compressor damage caused by the rotor shaking and impacting the internal structure of the compressor in the related art.
The invention provides a protection method of a magnetic suspension bearing system, which comprises the following steps: determining whether a rotor of the magnetic bearing system is in an un-levitated state; when the rotor is in an unsuspended state, the forward bearing coil and the backward bearing coil of the magnetic suspension bearing system are controlled to be electrified, or the axial bearing coil of the magnetic suspension bearing system is controlled to be electrified, so that the rotor is fixed.
Optionally, controlling energization of forward and rearward bearing coils of the magnetic bearing system to fix the rotor comprises: and controlling the energization of the single coil at the middle lower part of the forward bearing coil and the energization of the single coil at the middle lower part of the backward bearing coil to generate electromagnetic attraction force to act on the rotor so as to fix the rotor.
Optionally, the method further comprises: and when a rotor floating command is received, controlling the forward bearing coil and the backward bearing coil to stop electrifying, or controlling the axial bearing coil of the magnetic suspension bearing system to stop electrifying so as to release the fixation of the rotor.
Optionally, the method further comprises: judging whether a preset protection mode is in an open state or not; and executing the steps of the method of the invention under the condition that the preset protection mode is in an open state.
Optionally, the bearing controller of the magnetic suspension bearing system is provided with a pluggable storage power supply for supplying power to the bearing controller when the bearing controller is connected.
In another aspect, the present invention provides a protection device for a magnetic suspension bearing system, including: a determination unit for determining whether a rotor of the magnetic bearing system is in an un-levitated state; and the control unit is used for controlling the forward bearing coil and the backward bearing coil of the magnetic suspension bearing system to be electrified when the rotor is in an unsuspended state so as to fix the rotor.
Optionally, the control unit, which controls the energization of the forward bearing coil and the backward bearing coil of the magnetic bearing system to fix the rotor, comprises: and controlling the energization of a single coil at the middle lower part of the forward bearing coil and the energization of a single coil at the middle lower part of the backward bearing coil to generate electromagnetic attraction force to act on the rotor, or controlling the energization of an axial bearing coil of the magnetic suspension bearing system to fix the rotor.
Optionally, the control unit is further configured to: and when a rotor floating command is received, controlling the forward bearing coil and the backward bearing coil to stop electrifying, or controlling the axial bearing coil of the magnetic suspension bearing system to stop electrifying so as to release the fixation of the rotor.
Optionally, the method further comprises: the judging unit is used for judging whether the preset protection mode is in an open state or not; and executing the function of the device of the invention under the condition that the preset protection mode is in an open state.
Optionally, the bearing controller of the magnetic suspension bearing system is provided with a pluggable storage power supply for supplying power to the bearing controller when the bearing controller is connected.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
A further aspect of the invention provides a method of protecting a magnetic bearing system, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the methods described above when executing the program.
The invention further provides a protection device of a magnetic suspension bearing system, which comprises the protection device of the magnetic suspension bearing system.
According to the technical scheme of the invention, the bearing controller controls the axial bearing to exert force to attract the rotor, so that the position of the rotor is fixed, the damage of the magnetic suspension compressor caused by shaking and impacting in a special environment (such as a transportation or installation process) is avoided, the internal structures of the magnetic suspension rotor and the compressor are protected, and the problem that the compressor is damaged caused by shaking and impacting the internal structure of the compressor in the transportation, transportation and installation processes of the rotor in an unsuspended state is avoided.
According to the technical scheme of the invention, a pluggable storage power supply is added to the bearing controller, the bearing controller is powered by an external power supply, and the bearing controller can be continuously powered under the condition that the unit is in a power failure state or the whole unit cannot be powered on.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a method schematic diagram of an embodiment of a protection method of a magnetic levitation system provided by the present invention;
FIG. 2 shows a schematic view of a magnetic bearing structure;
FIG. 3 is a schematic structural diagram of an embodiment of an automatic point location calibration device for a robot according to the present invention;
FIG. 4 is a method diagram of one embodiment of a method of protecting a magnetic bearing system provided by the present invention;
fig. 5 is a block diagram of an embodiment of a protection device of a magnetic suspension bearing system provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a protection method of a magnetic suspension bearing system. The method may be implemented in a bearing controller of a magnetic bearing system.
Fig. 1 is a schematic method diagram of an embodiment of a protection method of a magnetic suspension bearing system provided by the invention.
As shown in fig. 1, according to an embodiment of the present invention, the method includes at least step S110 and step S120.
And step S110, determining that the rotor of the magnetic suspension bearing system is in a suspension state or an un-suspension state.
Specifically, the bearing controller monitors the state of the rotor in real time, and when the rotor floats, the bearing controller receives a mark that the rotor floats stably. When the rotor is in an un-levitated state, the bearing controller receives an indication that the rotor is not levitated. The controller executes a floating command to the rotor, and when the controller detects that the rotor is suspended to a fixed position through the displacement sensor, the controller judges that the rotor is stable in suspension and generates a mark of stable rotor suspension; otherwise, an unsettled stable marker is generated.
And step S120, controlling the forward bearing coil and the backward bearing coil of the magnetic suspension bearing system to be electrified or controlling the axial bearing coil of the magnetic suspension bearing system to be electrified when the rotor is in an unsuspended state so as to fix the rotor.
Controlling the forward bearing coil and the backward bearing coil of the magnetic suspension bearing system to be electrified so as to fix the rotor, specifically, the method may include: and controlling the energization of the single coil at the middle lower part of the forward bearing coil and the energization of the single coil at the middle lower part of the backward bearing coil to generate electromagnetic attraction force to act on the rotor so as to fix the rotor. There are two coils up and down in the forward bearing and two coils up and down in the rearward bearing, with a single coil being the lower coil of the forward bearing and the lower coil of the rearward bearing. More specifically, the bearing controller respectively controls the forward single coil on the lower part of the bearing to be electrified and the backward single coil on the lower part of the bearing to be electrified, and controls the coils to output stable current to generate stable electromagnetic attraction force to fix the rotor at the bottom of the cavity of the compressor, so that the rotor cannot shake and impact forwards and backwards due to external force impact to damage the internal structure of the compressor. For example, the current sensor is used for sampling and feeding back the current of the coil, so that the closed-loop calculation inside the bearing controller MCU is realized to control the coil to output stable current, and stable electromagnetic attraction is generated.
Controlling the axial bearing coils of the magnetic bearing system to be electrified so as to fix the rotor, specifically, the method may include: and controlling an axial bearing coil of the magnetic suspension bearing system to be electrified to generate electromagnetic attraction force so as to fix the rotor. Namely, the axial bearing single coil of the magnetic suspension bearing system is controlled to stop electrifying.
Further, when a rotor floating command is received, the forward bearing coil and the backward bearing coil are controlled to stop electrifying, or the axial bearing coil of the magnetic suspension bearing system is controlled to stop electrifying, so that the rotor is released from being fixed. Namely, the bearing controller respectively controls the forward bearing lower single coil to stop electrifying and the backward bearing lower single coil to stop electrifying, or the bearing controller controls the axial bearing single coil of the magnetic suspension bearing system to stop electrifying so as to release the fixation of the rotor.
Fig. 2 shows a schematic view of a magnetic bearing structure. As shown in fig. 2, 1, 2 are respectively a forward bearing coil and a backward bearing coil, and 3 is an axial bearing. When controlling the forward bearing coil 1 and the backward bearing coil 2 to be electrified, the rotor is attracted by the magnetic force of the forward bearing coil 1 and the backward bearing coil 2 and is fixed at the bottom of the cavity of the compressor.
Optionally, the bearing controller of the magnetic suspension bearing system is provided with a pluggable storage power supply for supplying power to the bearing controller when the bearing controller is connected. The case where the pluggable reservoir power source is connected to the bearing controller includes: installation, handling and/or transportation processes.
Fig. 3 shows a control relationship diagram of the present invention. As shown in fig. 3, the magnetic suspension bearing system includes a bearing controller, a forward bearing coil, a backward bearing coil and a current sensor, the bearing controller is provided with a pluggable storage power source, and the pluggable storage battery is connected to the bearing controller to supply power to the bearing controller in a required occasion (such as in the installation, transportation and/or transportation process). For example, a needle seat is arranged at the input port of the power supply of the bearing controller to be used as an input interface, the output end of the storage power supply is a needle seat joint matched with the storage power supply, and when the storage power supply needs to be connected, the storage power supply can be directly connected from the needle seat interface. In the occasions where the power is not needed (for example, if the unit is powered or the compressor is fixed at a fixed position after being installed, and the rotor is not impacted by external force when the compressor is stopped), the stored power can be disassembled for recycling when needed. The bearing controller can control the coil to output stable current in a closed-loop mode, the current sensor is used for sampling and feeding back the current of the coil, the stable current output by the coil is calculated and controlled in a closed-loop mode in the bearing controller MCU, stable electromagnetic attraction is generated to act on the rotor, and the effect of fixing the rotor is achieved.
Optionally, the method further comprises: judging whether a preset protection mode is in an open state or not; and executing the steps of the method of the invention under the condition that the preset protection mode is in an open state.
Specifically, a protection mode may be preset, and whether the preset protection mode is turned on or not may be set, for example, the magnetic suspension bearing system may include a main control screen. The main control screen can be used for setting whether to start the protection mode. Optionally, the main control screen can also be used to monitor and display the current of the coil and the state of the rotor.
Alternatively, the preset protection mode may be set to be automatically turned on. Specifically, the protection mode is initially set to be in a closed state, and when the rotor is in a suspension state, the protection mode is continuously kept to be in the closed state; when the rotor is in an unsuspended state, the protection mode is set to be in an opening state, and the bearing controller respectively controls the forward single coil on the lower portion of the bearing to be electrified and the backward single coil on the lower portion of the bearing to be electrified so as to generate electromagnetic attraction force to fix the rotor. And when the rotor needs to be suspended, releasing the fixation of the rotor, and setting the protection mode to be in a closed state.
For the purpose of clearly illustrating the technical solution of the present invention, the following describes an implementation flow of the protection method for a magnetic suspension bearing system according to an embodiment of the present invention.
FIG. 4 is a method diagram of an embodiment of a method for protecting a magnetic suspension bearing system according to the present invention. As shown in fig. 4, a protection mode is set in the bearing controller, and the protection mode is set to an off state, the bearing controller monitors the state of the rotor in real time, when the rotor floats, the bearing controller receives a mark indicating that the rotor floats stably, and at this time, the protection mode is continuously kept to the off state; when the rotor is not suspended, the bearing controller receives the sign that the rotor is not suspended, the protection mode is set to be an on state at the moment, the bearing controller respectively controls the power-on of a single coil at the lower part of the front bearing and the power-on of a single coil at the lower part of the rear bearing, and the current of the coils is sampled and fed back through the current sensor, so that the stable current output by the closed-loop calculation control coil in the MCU of the bearing controller is realized, the stable electromagnetic attraction force is generated, the rotor is fixed at the bottom of the cavity of the compressor, and the rotor cannot shake and collide front and back due to external force impact to damage the internal structure of the compressor. When the rotor needs to suspend, the bearing controller receives the floating command, the bearing controller releases the fixation of the rotor, and the protection mode is set to be in an off state, so that the normal suspension work of the rotor is not affected.
The invention also provides a protection device of the magnetic suspension bearing system. The device may be implemented in a bearing controller of a magnetic bearing system.
Fig. 5 is a block diagram of an embodiment of a protection device of a magnetic suspension bearing system provided by the invention. As shown in fig. 3, the protection apparatus 100 includes a determination unit 110 and a control unit 120.
The determination unit 110 is used to determine whether the rotor of the magnetic bearing system is in an un-levitated state.
Specifically, the bearing controller monitors the state of the rotor in real time, and when the rotor floats, the bearing controller receives a mark that the rotor floats stably. When the rotor is in an un-levitated state, the bearing controller receives an indication that the rotor is not levitated. The controller executes a floating command to the rotor, and when the controller detects that the rotor is suspended to a fixed position through the displacement sensor, the controller judges that the rotor is stable in suspension and generates a mark of stable rotor suspension; otherwise, an unsettled stable marker is generated.
The control unit 120 is configured to control the forward bearing coils and the backward bearing coils of the magnetic suspension bearing system to be energized or control the axial bearing coils of the magnetic suspension bearing system to be energized to fix the rotor when the rotor is in an un-levitated state.
The control unit 120 controls the forward bearing coil and the backward bearing coil of the magnetic suspension bearing system to be electrified so as to fix the rotor, which may specifically include: and controlling the energization of the single coil at the middle lower part of the forward bearing coil and the energization of the single coil at the middle lower part of the backward bearing coil to generate electromagnetic attraction force to act on the rotor so as to fix the rotor. There are two coils up and down in the forward bearing and two coils up and down in the rearward bearing, with a single coil being the lower coil of the forward bearing and the lower coil of the rearward bearing. More specifically, the bearing controller respectively controls the forward single coil on the lower part of the bearing to be electrified and the backward single coil on the lower part of the bearing to be electrified, and controls the coils to output stable current to generate stable electromagnetic attraction force to fix the rotor at the bottom of the cavity of the compressor, so that the rotor cannot shake and impact forwards and backwards due to external force impact to damage the internal structure of the compressor. For example, the current sensor is used for sampling and feeding back the current of the coil, so that the closed-loop calculation inside the bearing controller MCU is realized to control the coil to output stable current, and stable electromagnetic attraction is generated.
The controlling unit 120 controls the axial bearing coils of the magnetic bearing system to be energized so as to fix the rotor, which may specifically include: and controlling an axial bearing coil of the magnetic suspension bearing system to be electrified to generate electromagnetic attraction force so as to fix the rotor. Namely, the axial bearing single coil of the magnetic suspension bearing system is controlled to stop electrifying.
Further, the control unit 120 is further configured to: and when a rotor floating command is received, controlling the forward bearing coil and the backward bearing coil to stop electrifying, or controlling the axial bearing coil of the magnetic suspension bearing system to stop electrifying so as to release the fixation of the rotor. Namely, the bearing controller respectively controls the forward bearing lower single coil to stop electrifying and the backward bearing lower single coil to stop electrifying, or the bearing controller controls the axial bearing single coil of the magnetic suspension bearing system to stop electrifying so as to release the fixation of the rotor.
Fig. 2 shows a schematic view of a magnetic bearing structure. As shown in fig. 2, 1, 2 are respectively a forward bearing coil and a backward bearing coil, and 3 is an axial bearing. When controlling the forward bearing coil 1 and the backward bearing coil 2 to be electrified, the rotor is attracted by the magnetic force of the forward bearing coil 1 and the backward bearing coil 2 and is fixed at the bottom of the cavity of the compressor.
Optionally, the bearing controller of the magnetic suspension bearing system is provided with a pluggable storage power supply for supplying power to the bearing controller when the bearing controller is connected. The case where the pluggable reservoir power source is connected to the bearing controller includes: installation, handling and/or transportation processes.
Fig. 3 shows a control relationship diagram of the present invention. As shown in fig. 3, the magnetic suspension bearing system includes a bearing controller, a forward bearing coil, a backward bearing coil and a current sensor, the bearing controller is provided with a pluggable storage power source, and the pluggable storage battery is connected to the bearing controller to supply power to the bearing controller in a required occasion (such as in the installation, transportation and/or transportation process). For example, a needle seat is arranged at the input port of the power supply of the bearing controller to be used as an input interface, the output end of the storage power supply is a needle seat joint matched with the storage power supply, and when the storage power supply needs to be connected, the storage power supply can be directly connected from the needle seat interface. In the occasions where the power is not needed (for example, if the unit is powered or the compressor is fixed at a fixed position after being installed, and the rotor is not impacted by external force when the compressor is stopped), the stored power can be disassembled for recycling when needed. The bearing controller can control the coil to output stable current in a closed-loop mode, the current sensor is used for sampling and feeding back the current of the coil, the stable current output by the coil is calculated and controlled in a closed-loop mode in the bearing controller MCU, stable electromagnetic attraction is generated to act on the rotor, and the effect of fixing the rotor is achieved.
Optionally, the apparatus 100 further comprises a determining unit (not shown). The judging unit is used for judging whether the preset protection mode is in an open state or not; and executing the function of the device of the invention under the condition that the preset protection mode is in an open state.
Specifically, a protection mode may be preset, and whether the preset protection mode is turned on or not may be set, for example, the magnetic suspension bearing system may include a main control screen. The main control screen can be used for setting whether to start the protection mode. Optionally, the main control screen can also be used to monitor and display the current of the coil and the state of the rotor.
Alternatively, the preset protection mode may be set to be automatically turned on. Specifically, the protection mode is initially set to be in a closed state, and when the rotor is in a suspension state, the protection mode is continuously kept to be in the closed state; when the rotor is in an unsuspended state, the protection mode is set to be in an opening state, and the bearing controller respectively controls the forward single coil on the lower portion of the bearing to be electrified and the backward single coil on the lower portion of the bearing to be electrified so as to generate electromagnetic attraction force to fix the rotor. And when the rotor needs to be suspended, releasing the fixation of the rotor, and setting the protection mode to be in a closed state.
The invention also provides a storage medium corresponding to the method for protecting a magnetic bearing system, on which a computer program is stored which, when being executed by a processor, carries out the steps of any of the methods described above.
The invention also provides a bearing controller corresponding to the protection method of the magnetic bearing system, which comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of any one of the methods.
The invention also provides a bearing controller corresponding to the protection device of the magnetic suspension bearing system, which comprises the protection device of any one of the magnetic suspension bearing systems.
Therefore, according to the scheme provided by the invention, the bearing controller controls the axial bearing to exert force to attract the rotor, so that the position of the rotor is fixed, the magnetic suspension compressor is prevented from being damaged due to shaking and impacting in a special environment (such as a transportation or installation process), the internal structures of the magnetic suspension rotor and the compressor are protected, and the problem that the compressor is damaged due to shaking and impacting the internal structure of the compressor by the rotor in the transportation, transportation and installation processes when the rotor is not in a suspension state is solved.
According to the technical scheme of the invention, a pluggable storage power supply is added to the bearing controller, the bearing controller is powered by an external power supply, and the bearing controller can be continuously powered under the condition that the unit is in a power failure state or the whole unit cannot be powered on.
According to the technical scheme of the invention, the preset protection mode is started in the non-suspension state of the rotor, the electromagnetic attraction of the forward bearing and the backward bearing is controlled, the rotor is fixed, and the rotor is prevented from shaking due to external force in the non-suspension state. The protection mode can be set to be started or not, and in a relatively stable environment, the protection mode can be closed, and the pluggable storage power supply can be detached for secondary recycling. The current of the coil and the state of the rotor can be monitored through the main control screen, and the magnetic suspension rotor is ensured to be fixed firmly.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A method of protecting a magnetic bearing system, the method comprising:
determining whether a rotor of the magnetic bearing system is in an un-levitated state;
when the rotor is in an unsuspended state, the forward bearing coil and the backward bearing coil of the magnetic suspension bearing system are controlled to be electrified, or the axial bearing coil of the magnetic suspension bearing system is controlled to be electrified, so that the rotor is fixed.
2. The method of claim 1, wherein controlling energization of forward and rearward bearing coils of the magnetic bearing system to fix the rotor comprises:
and controlling the energization of the single coil at the middle lower part of the forward bearing coil and the energization of the single coil at the middle lower part of the backward bearing coil to generate electromagnetic attraction force to act on the rotor so as to fix the rotor.
3. The method of claim 1 or 2, further comprising:
and when a rotor floating command is received, controlling a forward bearing coil and a backward bearing coil of the magnetic suspension bearing system to stop electrifying, or controlling an axial bearing coil of the magnetic suspension bearing system to stop electrifying so as to release the fixation of the rotor.
4. The method according to any one of claims 1-3, further comprising:
judging whether a preset protection mode is in an open state or not; and executing the steps of the method of the invention under the condition that the preset protection mode is in an open state.
5. A method according to any of claims 1-4, characterized in that a bearing controller of the magnetic bearing system is provided with a pluggable reservoir power supply for powering the bearing controller when the bearing controller is plugged in.
6. A protection device for a magnetic bearing system, comprising:
a determination unit for determining whether a rotor of the magnetic bearing system is in an un-levitated state;
and the control unit is used for controlling the energization of a forward bearing coil and a backward bearing coil of the magnetic suspension bearing system or controlling the energization of an axial bearing coil of the magnetic suspension bearing system when the rotor is in an unsuspended state so as to fix the rotor.
7. The apparatus of claim 6, wherein the control unit controls the forward and backward bearing coils of the magnetic bearing system to be energized to fix the rotor, comprising:
and controlling the energization of the single coil at the middle lower part of the forward bearing coil and the energization of the single coil at the middle lower part of the backward bearing coil to generate electromagnetic attraction force to act on the rotor so as to fix the rotor.
8. An arrangement according to any of claims 6-7, characterized in that the bearing controller of the magnetic bearing system is provided with a pluggable reservoir power supply for powering the bearing controller when the bearing controller is plugged in.
9. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
10. A bearing controller comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the processor executing the program to perform the steps of the method as claimed in any one of claims 1 to 5 or to include a protection device for a magnetic bearing system as claimed in any one of claims 6 to 8.
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|---|---|---|---|
| CN202110943454.2A CN113503318A (en) | 2021-08-17 | 2021-08-17 | Protection method and device of magnetic suspension bearing system, medium and bearing controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110943454.2A CN113503318A (en) | 2021-08-17 | 2021-08-17 | Protection method and device of magnetic suspension bearing system, medium and bearing controller |
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| CN113503318A true CN113503318A (en) | 2021-10-15 |
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| CN202110943454.2A Pending CN113503318A (en) | 2021-08-17 | 2021-08-17 | Protection method and device of magnetic suspension bearing system, medium and bearing controller |
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Cited By (1)
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| CN114941653A (en) * | 2022-06-10 | 2022-08-26 | 珠海格力电器股份有限公司 | Control method and device for magnetic suspension bearing, magnetic bearing system and storage medium |
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