CN111536054A - Magnetic suspension centrifugal air compressor system and monitoring method thereof - Google Patents

Magnetic suspension centrifugal air compressor system and monitoring method thereof Download PDF

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Publication number
CN111536054A
CN111536054A CN202010348803.1A CN202010348803A CN111536054A CN 111536054 A CN111536054 A CN 111536054A CN 202010348803 A CN202010348803 A CN 202010348803A CN 111536054 A CN111536054 A CN 111536054A
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CN
China
Prior art keywords
motor
power supply
magnetic suspension
motor spindle
air compressor
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Pending
Application number
CN202010348803.1A
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Chinese (zh)
Inventor
李伟彬
林雄
吴锦莘
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Foshan Genesis Amb Tech Co ltd
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Foshan Genesis Amb Tech Co ltd
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Priority to CN202010348803.1A priority Critical patent/CN111536054A/en
Publication of CN111536054A publication Critical patent/CN111536054A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08Centrifugal pumps
    • F04D17/10Centrifugal pumps for compressing or evacuating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/08Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/05Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056Bearings
    • F04D29/058Bearings magnetic; electromagnetic

Abstract

The application relates to a magnetic suspension centrifugal air compressor system and a monitoring method thereof, wherein the system comprises a compressor main body, a magnetic suspension bearing assembly and a motor, and also comprises a sensor assembly, a collector, a motor driver, a power supply and a controller; the collector is connected with the sensor assembly; the controller is respectively connected with the collector and the motor driver; the controller receives the position acquisition data acquired by the acquisition device, processes the position acquisition data, and transmits a first adjusting signal to the power supply and a second adjusting signal to the motor driver according to the processing result; the power supply source adjusts an output power supply for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal; and the motor driver adjusts the rotating speed of the motor spindle according to the second adjusting signal. The magnetic suspension centrifugal air compressor can monitor the position deviation of the motor spindle, and can predict possible faults in advance according to vibration changes, so that pre-accident processing is realized, and the monitoring efficiency of the magnetic suspension centrifugal air compressor is improved.

Description

Magnetic suspension centrifugal air compressor system and monitoring method thereof
Technical Field
The application relates to the technical field of compressors, in particular to a magnetic suspension centrifugal air compressor system and a monitoring method thereof.
Background
The development of high speed, high efficiency centrifugal air compressors is a problem in solving the problems associated with screw compressors that are currently in the market for most medium sized compressors (e.g., 100kW class compressors). The screw compressor with the largest ratio in the medium-sized compressor market needs to be provided with a speed-up gear box and a lubricating system for realizing high-speed rotation. This mode not only polluted environment and equipment monitoring efficiency is on the low side, and the novel equipment that efficiency is higher and do not have oily pollution is urgently needed at present.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the conventional middle-sized compressor has a low monitoring efficiency.
Disclosure of Invention
In view of the above, it is necessary to provide a magnetic levitation centrifugal air compressor system and a monitoring method thereof to solve the problem of low monitoring efficiency of the conventional medium-sized compressor.
In order to achieve the above object, an embodiment of the present invention provides a magnetic suspension centrifugal air compressor system, including: the compressor comprises a compressor main body, and a magnetic suspension bearing assembly and a motor which are respectively arranged in the compressor main body; the motor comprises a motor main shaft and a motor stator sleeved on the motor main shaft; the magnetic suspension bearing assemblies are sleeved on two sides of the motor spindle; further comprising:
the sensor assembly is sleeved on two sides of the motor spindle; the sensor assembly is used for measuring the position data of the main shaft of the motor;
the collector is connected with the sensor assembly; the collector is used for collecting the position data of the main shaft of the motor to obtain position collected data;
the motor driver is used for driving the motor spindle to rotate;
the power supply is used for supplying power to the magnetic suspension bearing assembly;
the controller is respectively connected with the collector and the motor driver; the controller is used for receiving the position acquisition data acquired by the acquisition device, processing the position acquisition data, and transmitting a first adjusting signal to the power supply and a second adjusting signal to the motor driver according to the processing result; the power supply source adjusts an output power supply for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal; and the motor driver adjusts the rotating speed of the motor spindle according to the second adjusting signal.
In one embodiment, the controller processes the position acquisition data to obtain a position offset;
the controller transmits a first adjusting signal to the power supply when the position deviation amount is larger than a first threshold value,
when the position deviation amount is larger than a second threshold value, the controller transmits a second adjusting signal to the motor driver; the second threshold is greater than the first threshold.
In one embodiment, the sensor assembly comprises a first position sensor disposed at a first end of the motor spindle, and a second position sensor disposed at a second end of the motor spindle;
the first position sensor and the second position sensor are respectively connected with the collector.
In one embodiment, the sensor assembly further comprises a temperature sensor disposed proximate the motor shaft;
the temperature sensor is connected with the collector.
In one embodiment, the controller is a PLC controller or a DSP controller.
In one embodiment, the power supply is a dc power module.
In one embodiment, the magnetic suspension bearing assembly comprises a first radial magnetic suspension bearing arranged at a first end of the motor spindle and a second radial magnetic suspension bearing arranged at a second end of the motor spindle;
the first radial magnetic suspension bearing is connected with the direct-current power supply module; the second radial magnetic suspension bearing is connected with the direct-current power supply module.
In one embodiment, the magnetic suspension bearing assembly further comprises an axial magnetic suspension bearing arranged on the motor spindle;
the axial magnetic suspension bearing is connected with the direct current power supply module.
On the other hand, the embodiment of the invention also provides a magnetic suspension centrifugal air compressor monitoring method, which comprises the following steps:
receiving position acquisition data acquired by an acquisition device;
processing the position acquisition data, and transmitting a first adjusting signal to a power supply and a second adjusting signal to a motor driver according to a processing result; the first adjusting signal is used for indicating the power supply source to adjust the output power supply for supplying power to the magnetic suspension bearing assembly; the second adjustment signal is used for instructing the motor driver to adjust the rotating speed of the motor spindle.
In one embodiment, the step of processing the position acquisition data, and transmitting a first adjustment signal to the power supply and a second adjustment signal to the motor driver according to the processing result comprises:
processing the position acquisition data to obtain position offset;
when the position offset is larger than a first threshold value, transmitting a first adjusting signal to the power supply;
when the position deviation amount is larger than a second threshold value, transmitting a second adjusting signal to the motor driver; the second threshold is greater than the first threshold.
One of the above technical solutions has the following advantages and beneficial effects:
in each embodiment of the magnetic suspension centrifugal air compressor system, the sensor-based components are sleeved on two sides of the motor spindle; the collector is connected with the sensor assembly; the controller is respectively connected with the collector and the motor driver; the sensor assembly measures the position data of the main shaft of the motor; the collector collects the position data of the motor spindle measured by the sensor assembly to obtain position collected data; the controller receives the position acquisition data acquired by the acquisition device, processes the position acquisition data, and transmits a first adjusting signal to the power supply and a second adjusting signal to the motor driver according to the processing result; the power supply source adjusts an output power supply for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal; and the motor driver adjusts the rotating speed of the motor spindle according to the second adjusting signal, so that the magnetic suspension centrifugal air compressor monitors and adjusts the position deviation of the motor spindle in real time in the working process. This application is through carrying out real time monitoring to magnetic suspension centrifugal air compressor to according to the skew position of the motor spindle of monitoring, adjust the power size of input magnetic suspension bearing subassembly, and the rotational speed of adjustment motor spindle, and then the accessible monitoring motor spindle's vibration (position skew), and foresee the trouble that probably takes place in advance according to the vibration change, realize the pretreatment of accident, improved the monitoring efficiency to magnetic suspension centrifugal air compressor.
Drawings
FIG. 1 is a schematic diagram of a first configuration of a magnetically levitated centrifugal air compressor system in one embodiment;
FIG. 2 is a second schematic diagram of a magnetically levitated centrifugal air compressor system in one embodiment;
FIG. 3 is a schematic diagram of a first process of a magnetic levitation centrifugal air compressor monitoring method in one embodiment;
FIG. 4 is a second flow diagram of a method for monitoring a magnetically levitated centrifugal air compressor according to one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to solve the problem of low monitoring efficiency of the conventional middle-sized compressor. In one embodiment, as shown in FIG. 1, there is provided a magnetic levitation centrifugal air compressor system comprising: the compressor comprises a compressor main body 110, and a magnetic suspension bearing assembly 120 and a motor 130 which are respectively arranged on the compressor main body 110; the motor 130 includes a motor spindle 132 and a motor stator 134 sleeved on the motor spindle 132. The magnetic suspension bearing assembly 120 is sleeved on two sides of the motor spindle 132; further comprising:
the sensor assembly 140, the sensor assembly 140 is sleeved on two sides of the motor spindle 132; sensor assembly 140 is used to measure motor spindle position data;
the collector 150 is connected with the sensor assembly 140; the collector 150 is used for collecting the position data of the main shaft of the motor to obtain position collected data;
the motor driver 160, the motor driver 160 is used for driving the motor spindle 132 to rotate;
a power supply 170, the power supply 170 being used to supply power to the magnetic bearing assembly 120;
the controller 180, the controller 180 connects collector 150, motor driver 160 separately; the controller 180 is configured to receive the position acquisition data acquired by the acquisition unit 150, process the position acquisition data, and transmit a first adjustment signal to the power supply 170 and a second adjustment signal to the motor driver 160 according to a processing result; the power supply 170 adjusts an output power for supplying power to the magnetic bearing assembly 120 according to the first adjustment signal; the motor driver adjusts the rotational speed of the motor spindle 132 in response to the second adjustment signal 160.
Wherein, the compressor body 110 may include a compressor housing, and the inside of the compressor body 110 may be used to embed the magnetic bearing assembly 120 and the motor 130, etc. The compressor body 110 may further include a fluid portion, and the fluid portion of the compressor body 110 may serve as a passage through which a medium flows, withstand the pressure of the medium, and forcibly close. The magnetic bearing assembly 120 refers to a bearing assembly capable of generating a magnetic force by the principle of electromagnetic induction. The magnetic bearing assembly 120 may be used to maintain the motor spindle in suspension.
It should be noted that, when the magnetic suspension bearing assembly 120 maintains the motor spindle in suspension, the magnetic suspension bearing assembly 120 is not in contact with the spindle of the motor 130, and no lubricant needs to be added.
The motor 130 may be a permanent magnet motor. In one example, the motor 130 may be a permanent magnet direct drive high speed motor. The motor stator 134 may be a stationary portion of the motor. The motor stator 134 may be comprised of three parts, a stator core, stator windings, and a housing. The primary function of the motor stator 134 is to generate a rotating magnetic field that causes the motor spindle to rotate. The motor spindle 132 refers to a rotating member in the motor.
The sensor assembly 140 may include at least two sensors. The sensor assembly 140 may be used to measure position data of the motor spindle 132. The motor driver 160 may be used to drive the motor 130 to operate, thereby causing the motor spindle 132 to rotate. The power supply 170 may be used to supply power to the magnetic bearing assembly 120, and the magnetic bearing assembly 120 may adjust the output magnetic field according to the current of the power supply 170, so as to maintain the motor spindle 132 in levitation. The controller 180 refers to a processing device capable of performing functions such as data processing and data transmission.
Specifically, when the magnetically levitated centrifugal air compressor is powered on and started, the sensor assembly 140 may measure the motor spindle position data in real time. The collector 150 may collect the motor spindle position data measured by the sensor assembly 140 to obtain position collected data corresponding to the motor spindle 132, and transmit the position collected data to the controller 180. The controller 180 may further receive the position acquisition data acquired by the acquirer 150 and process the position acquisition data; the controller 180 may transmit a first adjustment signal to the power supply 170 according to the processed result, and the power supply 170 may adjust the magnitude of the output power for supplying power to the magnetic bearing assembly 120 according to the first adjustment signal. The controller 180 may also transmit a second adjustment signal to the motor driver 160 according to the processing result, and the motor driver 160 may adjust the rotation speed of the motor spindle 132 according to the second adjustment signal, so that the motor spindle 132 maintains levitation, the motor spindle 132 is prevented from contacting the magnetic levitation bearing assembly 120, and a fault is avoided.
In the embodiment of the magnetic suspension centrifugal air compressor system, the sensor-based components are sleeved on two sides of the motor spindle; the collector is connected with the sensor assembly; the controller is respectively connected with the collector and the motor driver; the sensor assembly measures the position data of the main shaft of the motor; the collector collects the position data of the motor spindle measured by the sensor assembly to obtain position collected data; the controller receives the position acquisition data acquired by the acquisition device, processes the position acquisition data, and transmits a first adjusting signal to the power supply and a second adjusting signal to the motor driver according to the processing result; the power supply source adjusts an output power supply for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal; and the motor driver adjusts the rotating speed of the motor spindle according to the second adjusting signal, so that the magnetic suspension centrifugal air compressor monitors and adjusts the position deviation of the motor spindle in real time in the working process. By monitoring the magnetic suspension centrifugal air compressor in real time, adjusting the power input into the magnetic suspension bearing assembly and the rotating speed of the motor spindle according to the monitored offset position of the motor spindle, the pre-accident treatment is realized by monitoring the vibration (position offset) of the motor spindle and predicting the possible faults in advance according to the vibration change, and the monitoring efficiency of the magnetic suspension centrifugal air compressor is improved.
In a specific embodiment, the controller processes the position acquisition data to obtain a position offset; when the position deviation amount is larger than a first threshold value, the controller transmits a first adjusting signal to the power supply, and when the position deviation amount is larger than a second threshold value, the controller transmits a second adjusting signal to the motor driver; the second threshold is greater than the first threshold.
Specifically, the controller may perform difference processing on the acquired position acquisition data and the standard position data, and may further obtain the position offset. The controller can compare the position offset with the first threshold value, and transmits a first adjusting signal to the power supply according to the processing result when the position offset is larger than the first threshold value, so that the power supply can adjust the output power supply for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal. The controller can also compare the position offset with a second threshold value, and transmit a second adjusting signal to the motor driver according to the processing result when the position offset is greater than the second threshold value, so that the motor driver can adjust the rotating speed of the motor spindle according to the second adjuster. And further, the possible faults can be predicted in advance according to vibration changes by monitoring the vibration (position deviation) of the motor spindle, so that pre-accident processing is realized, and the monitoring efficiency of the magnetic suspension centrifugal air compressor is improved.
It should be noted that the second threshold is larger than the first threshold.
In one embodiment, as shown in FIG. 2, the sensor assembly 140 includes a first position sensor 142 disposed at a first end of the motor spindle 132, and a second position sensor 144 disposed at a second end of the motor spindle 132; the first position sensor 142 and the second position sensor 144 are each connected to a collector 150.
The first position sensor 142 is a sensor that senses the position of the object and converts the sensed position into a usable output signal. The first position sensor 142 may be a proximity sensor. Second position sensor 144 refers to a sensor that senses the position of the object being measured and converts the sensed position to a usable output signal. The second position sensor 144 may be a proximity sensor.
Specifically, the first position sensor 142 is disposed at a first end of the motor spindle 132, and the second position sensor 144 is disposed at a second end of the motor spindle 132; the first position sensor 142 and the second position sensor 144 are each connected to a collector 150. The first position sensor 142 can measure the position data of the first end of the motor spindle 132, the second position sensor 144 can measure the position data of the second end of the motor spindle 132, and the collector 150 can collect the position data of the first end of the motor spindle 132 measured by the first position sensor 142 and the position data of the second end of the motor spindle 132 measured by the second position sensor 144, respectively, and transmit the collected position data of the first end of the motor spindle 132 and the position data of the second end of the motor spindle 132 to the controller 180, the controller 180 processes the received position data of the first end of the motor spindle 132 and the position data of the second end of the motor spindle 132, and according to the processed result, the power supply 170 is controlled to adjust the power size of the magnetic suspension bearing assembly 120, and the motor driver 160 is controlled to adjust the rotating speed of the motor spindle 132, so as to realize that the magnetic suspension centrifugal air compressor works, the real-time monitoring and adjustment of the position deviation of the motor spindle improves the monitoring efficiency of the magnetic suspension centrifugal air compressor.
In a particular embodiment, the sensor assembly further comprises a temperature sensor disposed proximate the motor shaft; the temperature sensor is connected with the collector.
Wherein, the temperature sensor refers to a sensor which can sense the temperature and convert into a usable output signal. The temperature sensor may be a contact temperature sensor or a non-contact temperature sensor.
Specifically, based on temperature sensor connects the collector, temperature sensor can gather the temperature data of motor spindle to the temperature data who will gather transmit the controller. The controller processes the received temperature data and controls the motor driver to adjust the rotating speed of the motor spindle according to the processing result.
In one example, the controller controls the motor driver to power down when the temperature data exceeds a temperature threshold, so that the motor spindle stops rotating, and the motor spindle is prevented from being over-heated to damage the magnetic suspension centrifugal air compressor.
In a specific embodiment, the controller is a PLC controller or a DSP controller.
In a specific embodiment, the power supply is a dc power module.
In one embodiment, the magnetic bearing assembly comprises a first radial magnetic bearing provided at a first end of the motor spindle, and a second radial magnetic bearing provided at a second end of the motor spindle. The first radial magnetic suspension bearing is connected with the direct-current power supply module; the second radial magnetic suspension bearing is connected with the direct-current power supply module.
The first radial magnetic suspension bearing is an annular magnetic suspension bearing; the first radial magnetic bearing refers to a magnetic bearing capable of generating a radial magnetic force. The second radial magnetic suspension bearing is an annular magnetic suspension bearing; the second radial magnetic bearing refers to a magnetic bearing capable of generating a radial magnetic force. The first radial magnetic suspension bearing and the second radial magnetic suspension bearing are fixedly embedded in the compressor main body respectively.
Specifically, the sensor assembly may measure position data of the first radial magnetic bearing and a first end of the motor spindle, and position data of the second radial magnetic bearing and a second end of the motor spindle, respectively. And then the collector can gather the position data of motor spindle first end and the position data of motor spindle second end respectively to position data transmission for the controller that will gather.
In a specific embodiment, the magnetic suspension bearing assembly further comprises an axial magnetic suspension bearing arranged on the motor spindle; the axial magnetic suspension bearing is connected with the direct current power supply module.
The axial magnetic suspension bearing refers to a magnetic suspension bearing capable of generating axial magnetic force.
The bearing-based magnetic suspension bearing is arranged on the motor spindle, so that the motor spindle can be maintained to be axially fixed.
In one embodiment, as shown in fig. 3, there is also provided a magnetic levitation centrifugal air compressor monitoring method, comprising the steps of:
step S310, receiving the position acquisition data acquired by the acquisition unit.
Step S320, processing the position acquisition data, and transmitting a first adjusting signal to a power supply and a second adjusting signal to a motor driver according to the processing result; the first adjusting signal is used for indicating the power supply source to adjust the output power supply for supplying power to the magnetic suspension bearing assembly; the second adjustment signal is used for instructing the motor driver to adjust the rotating speed of the motor spindle.
Specifically, the controller can receive position acquisition data acquired by the collector and process the position acquisition data; the controller may transmit a first adjustment signal to the power supply and a second adjustment signal to the motor driver according to the result of the processing; enabling the power supply to adjust an output power supply for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal; and the motor driver adjusts the rotating speed of the motor spindle according to the second adjusting signal, so that the magnetic suspension centrifugal air compressor can monitor and adjust the position deviation of the motor spindle in real time in the working process.
In the embodiment, the magnetic suspension centrifugal air compressor is monitored in real time, the power input to the magnetic suspension bearing assembly is adjusted according to the monitored offset position of the motor spindle, the rotating speed of the motor spindle is adjusted, and further, the possible faults can be predicted in advance by monitoring the vibration (position offset) of the motor spindle according to the vibration change, so that the pre-accident treatment is realized, and the monitoring efficiency of the magnetic suspension centrifugal air compressor is improved.
In one embodiment, as shown in fig. 4, the step of processing the position acquisition data, and transmitting a first adjustment signal to the power supply and a second adjustment signal to the motor driver according to the processing result comprises:
and step S410, processing the position acquisition data to obtain the position offset.
Step S420, when the position offset is greater than the first threshold, transmitting a first adjustment signal to the power supply.
Step S430, when the position offset is larger than a second threshold value, transmitting a second adjusting signal to the motor driver; the second threshold is greater than the first threshold.
Specifically, the controller may perform difference processing on the acquired position acquisition data and the standard position data, and may further obtain the position offset. The controller can compare the position offset with the first threshold value, and transmits a first adjusting signal to the power supply according to the processing result when the position offset is larger than the first threshold value, so that the power supply can adjust the output power supply for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal. The controller can also compare the position offset with a second threshold value, and transmit a second adjusting signal to the motor driver according to the processing result when the position offset is greater than the second threshold value, so that the motor driver can adjust the rotating speed of the motor spindle according to the second adjuster. And further, the possible faults can be predicted in advance according to vibration changes by monitoring the vibration (position deviation) of the motor spindle, so that pre-accident processing is realized, and the monitoring efficiency of the magnetic suspension centrifugal air compressor is improved.
It should be understood that although the various steps in the flow charts of fig. 3-4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3-4 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the division methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A magnetically levitated centrifugal air compressor system, comprising: the compressor comprises a compressor main body, and a magnetic suspension bearing assembly and a motor which are respectively arranged in the compressor main body; the motor comprises a motor spindle and a motor stator sleeved on the motor spindle; the magnetic suspension bearing assembly is sleeved on two sides of the motor spindle; further comprising:
the sensor assembly is sleeved on two sides of the motor spindle; the sensor assembly is used for measuring the motor spindle position data;
the collector is connected with the sensor assembly; the collector is used for collecting the position data of the motor spindle to obtain position collected data;
the motor driver is used for driving the motor spindle to rotate;
a power supply for supplying power to the magnetic bearing assembly;
the controller is respectively connected with the collector and the motor driver; the controller is used for receiving the position acquisition data acquired by the acquisition device, processing the position acquisition data, and transmitting a first adjusting signal to the power supply and a second adjusting signal to the motor driver according to the processing result; the power supply source adjusts an output power source for supplying power to the magnetic suspension bearing assembly according to the first adjusting signal; and the motor driver adjusts the rotating speed of the motor spindle according to the second adjusting signal.
2. The magnetically suspended centrifugal air compressor system of claim 1, wherein the controller processes the position acquisition data to obtain a position offset;
the controller transmits a first adjustment signal to the power supply when the amount of positional offset is greater than a first threshold,
the controller transmits a second adjusting signal to the motor driver when the position offset is larger than a second threshold value; the second threshold is greater than the first threshold.
3. The magnetically suspended centrifugal air compressor system of claim 2, wherein the sensor assembly comprises a first position sensor disposed at a first end of the motor spindle, and a second position sensor disposed at a second end of the motor spindle;
the first position sensor and the second position sensor are respectively connected with a collector.
4. The magnetically levitated centrifugal air compressor system of claim 3, wherein the sensor assembly further includes a temperature sensor disposed proximate the motor shaft;
the temperature sensor is connected with the collector.
5. The magnetic levitation centrifugal air compressor system of claim 1, wherein the controller is a PLC controller or a DSP controller.
6. The magnetically levitated centrifugal air compressor system of claim 1, wherein the power supply is a direct current power supply module.
7. The magnetically levitated centrifugal air compressor system of claim 6, wherein the magnetically levitated bearing assembly includes the first radial magnetic bearing disposed at a first end of the motor spindle and a second radial magnetic bearing disposed at a second end of the motor spindle;
the first radial magnetic suspension bearing is connected with the direct-current power supply module; and the second radial magnetic suspension bearing is connected with the direct-current power supply module.
8. The magnetically levitated centrifugal air compressor system of claim 7, wherein the magnetically levitated bearing assembly further includes an axial magnetically levitated bearing provided to the motor spindle;
the axial magnetic suspension bearing is connected with the direct current power supply module.
9. A magnetic suspension centrifugal air compressor monitoring method is characterized by comprising the following steps:
receiving position acquisition data acquired by an acquisition device;
processing the position acquisition data, and transmitting a first adjusting signal to a power supply and a second adjusting signal to a motor driver according to a processing result; the first adjustment signal is used for instructing the power supply source to adjust an output power supply for supplying power to the magnetic levitation bearing assembly; the second adjusting signal is used for indicating the motor driver to adjust the rotating speed of the motor spindle.
10. The method of claim 9, wherein the step of processing the position data and transmitting a first adjustment signal to a power supply and a second adjustment signal to a motor driver according to the result of the processing comprises:
processing the position acquisition data to obtain position offset;
transmitting a first adjustment signal to the power supply when the position offset is greater than a first threshold;
transmitting a second adjustment signal to the motor driver when the position offset is greater than a second threshold; the second threshold is greater than the first threshold.
CN202010348803.1A 2020-04-29 2020-04-29 Magnetic suspension centrifugal air compressor system and monitoring method thereof Pending CN111536054A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114135580A (en) * 2021-11-04 2022-03-04 珠海格力电器股份有限公司 Position evaluation method and device for magnetic bearing rotor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114135580A (en) * 2021-11-04 2022-03-04 珠海格力电器股份有限公司 Position evaluation method and device for magnetic bearing rotor
CN114135580B (en) * 2021-11-04 2022-07-26 珠海格力电器股份有限公司 Position evaluation method and device for magnetic bearing rotor

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