CN117090791A - Surge detection and anti-surge control method and device for air compressor - Google Patents

Surge detection and anti-surge control method and device for air compressor Download PDF

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Publication number
CN117090791A
CN117090791A CN202311203464.8A CN202311203464A CN117090791A CN 117090791 A CN117090791 A CN 117090791A CN 202311203464 A CN202311203464 A CN 202311203464A CN 117090791 A CN117090791 A CN 117090791A
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CN
China
Prior art keywords
air compressor
surge
amplitude
vibration
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311203464.8A
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Chinese (zh)
Inventor
尚伟华
张剑
熊洁
李波
胡永明
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Dongfeng Motor Corp
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Dongfeng Motor Corp
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Filing date
Publication date
Application filed by Dongfeng Motor Corp filed Critical Dongfeng Motor Corp
Priority to CN202311203464.8A priority Critical patent/CN117090791A/en
Publication of CN117090791A publication Critical patent/CN117090791A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
    • F04D27/0215—Arrangements therefor, e.g. bleed or by-pass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
    • F04D27/0223—Control schemes therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0261—Surge control by varying driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0284—Conjoint control of two or more different functions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/04664—Failure or abnormal function
    • H01M8/04686—Failure or abnormal function of auxiliary devices, e.g. batteries, capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04746—Pressure; Flow
    • H01M8/04753—Pressure; Flow of fuel cell reactants

Abstract

The application discloses a surge detection and anti-surge control method, device, equipment and medium for an air compressor, and belongs to the technical field of fuel cells. The detection method comprises the following steps: acquiring vibration frequency and amplitude of an air compressor; and if the vibration frequency is larger than a set frequency threshold value and the amplitude is larger than a set amplitude threshold value, judging that the air compressor is in surge. According to the detection method, whether the air compressor is in surge or not can be judged through the vibration frequency and the vibration amplitude of the air compressor, and the air compressor is not influenced by the environment, the temperature and the aging degree, so that the judgment of surge is more accurate, and the damage risk of the air compressor is reduced.

Description

Surge detection and anti-surge control method and device for air compressor
Technical Field
The application relates to the technical field of fuel cells, in particular to a surge detection and anti-surge control method, device, equipment and medium for an air compressor.
Background
The air compressor for the fuel cell system can generate surge under a certain rotating speed and a low flow rate and high pressure ratio. The surge can cause serious damage to the air compressor, and the service life of the air compressor is greatly reduced. The air compressor is the heart of the fuel cell air system, and the safety and the service life of the air compressor directly influence the safe operation of the whole fuel cell system.
At present, a surge line provided by a manufacturer is used as a basis for judging whether surge occurs during operation of the air compressor, and specifically, the surge can be prevented from occurring in the air compressor according to the actual values of the air flow and the air pressure ratio of the air compressor and the surge line.
However, in actual operation, the surge line of the air compressor is a curve which changes in real time and has a certain difference from the surge line provided by the manufacturer. Therefore, the method for judging whether the air compressor is in surge or not according to the surge line is not accurate enough, and misjudgment is easy to generate, so that the risk of damage to the air compressor is increased.
Disclosure of Invention
In view of the foregoing, the present application has been made to provide a surge detection and anti-surge control method, apparatus, device, and medium for an air compressor, which overcome or at least partially solve the foregoing problems, and which can determine whether or not the air compressor is in surge by the vibration frequency and amplitude of the air compressor, and determine that the air compressor is in surge if the vibration frequency is greater than a set frequency threshold and the amplitude is greater than a set amplitude threshold. The method is not influenced by environment, temperature and aging degree, so that the judgment of surge is more accurate, and the damage risk of the air compressor is reduced.
In a first aspect, the present application provides a method for detecting surge of an air compressor, the method comprising:
acquiring vibration frequency and amplitude of an air compressor;
and if the vibration frequency is larger than a set frequency threshold value and the amplitude is larger than a set amplitude threshold value, judging that the air compressor is in surge.
Optionally, the detection method includes:
obtaining the vibration displacement of the air compressor;
and carrying out Fourier transform on the vibration displacement to obtain the vibration frequency and the vibration amplitude of the air compressor.
Optionally, the detection method further includes:
controlling the air compressor to work at different rotating speeds, and continuously adjusting the gas flow of the air compressor;
recording the surge frequency and the surge amplitude when the air compressor surges;
and determining the frequency threshold and the amplitude threshold according to the surge frequency and the surge amplitude.
In a second aspect, the application provides an anti-surge control method of an air compressor, which comprises the following steps:
and if the air compressor is judged to surge, increasing the gas flow of the air compressor and/or reducing the gas pressure of the air compressor.
Optionally, the increasing the gas flow rate of the air compressor includes:
and increasing the rotating speed of the air compressor and increasing the opening of the bypass valve.
Optionally, the increasing the rotation speed of the air compressor includes:
determining a difference between the amplitude and the amplitude threshold;
and controlling the air compressor to increase the rotating speed at the rising rate corresponding to the difference value, wherein different difference values correspond to different rising rates.
In a third aspect, the present application provides an air compressor surge detection device, the detection device comprising:
the acquisition module is used for acquiring the vibration frequency and the vibration amplitude of the air compressor;
and the judging module is used for judging that the air compressor is in surge if the vibration frequency is larger than a set frequency threshold value and the amplitude is larger than a set amplitude threshold value.
Optionally, the detection device further includes a transformation module, configured to:
obtaining the vibration displacement of the air compressor;
and carrying out Fourier transform on the vibration displacement to obtain the vibration frequency and the vibration amplitude of the air compressor.
Optionally, the detection device further includes a determining module, configured to:
controlling the air compressor to work at different rotating speeds, and continuously adjusting the gas flow of the air compressor;
recording the surge frequency and the surge amplitude when the air compressor surges;
and determining the frequency threshold and the amplitude threshold according to the surge frequency and the surge amplitude.
In a fourth aspect, the present application provides an anti-surge control device for an air compressor, the control device comprising:
and the control module is used for increasing the gas flow of the air compressor and/or reducing the gas pressure of the air compressor if the air compressor is in surge.
Optionally, the control module 610 further includes:
and the adjusting unit is used for increasing the rotating speed of the air compressor and increasing the opening degree of the bypass valve.
Optionally, the adjusting unit is further configured to:
determining a difference between the amplitude and the amplitude threshold;
and controlling the air compressor to increase the rotating speed at the rising rate corresponding to the difference value, wherein different difference values correspond to different rising rates.
In a fifth aspect, the present application provides an electronic device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method according to the first and second aspects.
In a fourth aspect, the present application provides a computer readable storage medium storing computer instructions for causing a computer to perform the methods of the first and second aspects.
The technical scheme provided by the embodiment of the application has at least the following technical effects or advantages:
according to the air compressor surge detection method, the air compressor surge detection device, the air compressor surge prevention control method, the air compressor surge prevention control device and the air compressor surge detection medium, whether the air compressor surges or not can be judged through the vibration frequency and the vibration amplitude of the air compressor, and if the vibration frequency is larger than a set frequency threshold value and the vibration amplitude is larger than a set vibration amplitude threshold value, the air compressor surge is judged. The method is not influenced by environment, temperature and aging degree, so that the judgment of surge is more accurate, and the damage risk of the air compressor is reduced.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural diagram of a fuel cell air system according to an embodiment of the present application;
fig. 2 is a flowchart of a surge detection method of an air compressor provided by an embodiment of the application;
FIG. 3 is a graph showing the relationship among gas flow, gas pressure ratio and rotation speed of an air compressor according to an embodiment of the present application;
fig. 4 is a flowchart of an anti-surge control method of an air compressor provided by an embodiment of the application;
fig. 5 is a block diagram of a surge detection device of an air compressor according to an embodiment of the present application;
fig. 6 is a block diagram of an anti-surge control device of an air compressor according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Firstly, an application scenario related to the anti-surge control method of the air compressor provided by the embodiment of the application is briefly introduced.
Most of the air compressors for fuel cell systems are centrifugal high-speed air compressors. Under a certain rotating speed, the air compressor can surge under the conditions of low air flow and high air pressure ratio, and the surge can cause serious damage to the air compressor, so that the service life is greatly reduced. The air compressor is a heart of the air system of the fuel cell, and therefore, the safety and the service life of the air compressor play a critical role in the safe and stable operation of the whole fuel cell system.
At present, a surge line provided by a manufacturer is used as a basis for judging whether surge occurs during operation of the air compressor, and specifically, the surge can be prevented from occurring in the air compressor according to the actual values of the air flow and the air pressure ratio of the air compressor and the surge line.
The surge line is a relation curve between the gas flow rate and the gas pressure ratio of the air compressor. The manufacturer provides only one surge line, and the curve is used as the surge line of the air compressor in the whole life cycle of the fuel cell system. However, in actual operation of the air compressor, the surge line is a curve that varies in real time with temperature, inlet pressure, and aging, which results in the manufacturer providing a surge line that varies somewhat from the surge line in actual operation conditions. Therefore, the method for judging whether the air compressor can surge according to the surge line provided by the manufacturer can be simply used in the early stage of the air compressor, but the judgment of whether the air compressor surge is inaccurate and is easy to misjudge as the air compressor is aged continuously, so that the risk of damage of the air compressor is increased.
The applicant found that when the air compressor is surging, the vibration amount of the air compressor in a high frequency region becomes large. Therefore, in order to solve the problems, the patent provides a surge detection method of an air compressor, which can judge whether the air compressor is in surge or not through the vibration frequency and the vibration amplitude of the air compressor, and the method is not influenced by the environment, the temperature and the aging degree, so that the judgment of surge is more accurate. And if the air compressor is judged to surge, an anti-surge control method is adopted to timely increase the gas flow of the air compressor and/or reduce the gas pressure of the air compressor, so that the air compressor can be effectively prevented from entering a surge state, and the damage risk of the air compressor is reduced.
Next, an implementation environment related to the embodiment of the present application will be briefly described.
Fig. 1 is a schematic structural diagram of a fuel cell air system according to an embodiment of the present application, and as shown in fig. 1, a fuel cell air system 100 includes an air cleaner 101, an air compressor 102, an intercooler 103, a stack 104, a throttle valve 105, a displacement sensor 106, a bypass valve 107, and a connecting pipe (not shown in the figure).
Wherein the throttle valve 105 comprises a first throttle valve at the inlet of the stack 104 and a second throttle valve at the outlet of the stack 104. The air filter 101, the air compressor 102, the intercooler 103, the first throttle valve and the inlets of the electric pile 104 are sequentially connected through connecting pipelines, the bypass valve 107 is connected between the output end of the intercooler 103 and the input end of the first throttle valve through connecting pipelines, and the second throttle valve is connected with the outlets of the electric pile 104 through pipelines. The displacement sensor 106 is disposed on the air compressor for detecting displacement of the air compressor.
The air filter is used for filtering dust and sand grains in the air, and ensures that clean air enters the air cylinder of the air compressor. The air compressor is used for providing air with certain flow and pressure for the electric push. The intercooler is used to reduce the temperature of the air. The galvanic pile is used to convert chemical energy into electrical energy.
The operating principle of the fuel cell air system is as follows: after being filtered by the air filter 101, air enters the air compressor 102, the temperature of the filtered air is increased after being pressurized by the air compressor 102, the air with the increased temperature is cooled after flowing through the intercooler 103, the cooled air flows into the electric pile 104 through the first throttle valve at the inlet of the electric pile 104, and is discharged through the second throttle valve after being reacted by the electric pile 104. The bypass valve 107 is used to regulate the flow of gas into the stack 104.
After describing the application scenario and the implementation environment related to the embodiment of the present application, the anti-surge control method for the air compressor provided by the embodiment of the present application will be described in detail with reference to the accompanying drawings.
Fig. 2 is a flowchart of a surge detection method of an air compressor according to an embodiment of the present application, as shown in fig. 2, the detection method includes:
step S210, obtaining vibration frequency and vibration amplitude of the air compressor.
Fig. 3 is a graph showing the relationship among the air flow, the air pressure ratio and the rotation speed of the air compressor according to the embodiment of the present application, wherein, as shown in fig. 3, the X-axis is the air flow m of the air compressor, the Y-axis is the air pressure ratio Pr of the air compressor, and the pressure ratio pr=p out /P in ，P out Is the outlet pressure of the air compressor, P in Is the inlet pressure of the air compressor. The different relation curves of the gas flow and the gas pressure ratio can be seen from the rotating speed line of the air compressor at different rotating speeds. When the fuel cell system is operated, if the gas with small gas flow and high gas pressure is electrically pushed, the air compressor can enter a working state with low gas flow and high gas pressure ratio; when the air flow rate of the air compressor is sufficiently small and the air pressure ratio is sufficiently large, a surge phenomenon occurs.
In this embodiment, when the air compressor is in surge, the vibration amount of the air compressor in the high frequency region becomes large. Therefore, the detection method needs to acquire the vibration frequency and the vibration amplitude of the air compressor.
Optionally, the detection method further includes:
obtaining the vibration displacement of an air compressor; and carrying out Fourier transform on the vibration displacement to obtain the vibration frequency and the vibration amplitude of the air compressor.
Wherein the fourier transform (Fourier transform) is a linear integral transform for transforming the signal between the time domain (or spatial domain) and the frequency domain.
In this embodiment, the vibration displacement amount of the air compressor is detected by a displacement sensor arranged on the air compressor. The plurality of displacement sensors can be respectively arranged at different positions of the air compressor, and finally, the average value of the vibration displacement amounts detected by the plurality of sensors is taken as the vibration displacement amount of the air compressor.
In this embodiment, the vibration displacement amount detected by the displacement sensor is a change in time domain, that is, a change in time of the vibration displacement amount; then, the vibration displacement amount is converted from a time domain to a frequency domain through Fourier change, so that the relation between the vibration displacement amount and the vibration frequency is obtained, and the relation between the amplitude and the vibration frequency is obtained.
Step S220, if the vibration frequency is larger than the set frequency threshold value and the amplitude is larger than the set amplitude threshold value, the air compressor is judged to surge.
In this embodiment, when the air compressor is not in surge, the vibration of the air compressor is generally caused by the vibration of the whole vehicle, and at this time, the corresponding vibration frequency is in a low frequency region, for example, some air compressors are mainly concentrated below 100 hertz (Hz); the amplitude of the vibration displacement is also small. When the air compressor is in surge, the vibration quantity of the air compressor can be increased due to the fact that the air inside the air compressor is not smooth in circulation, and the change of the vibration quantity is mainly concentrated on high frequency. For example, some air compressors are focused mainly on 300Hz or more.
In this embodiment, it is not necessary to measure the surge line of the air compressor in advance, but it is directly determined whether the air compressor will surge according to the actual operation state of the air compressor. The method is wide in application range, and is still applicable when the air compressor of the fuel cell air system needs to be replaced, so that the time for system maintenance is reduced, and the working efficiency of personnel is improved. Moreover, only two indexes of vibration frequency and vibration amplitude are used for judging, the air compressor is not affected by aging of the air compressor and temperature and pressure of an operating environment, the judgment result is more accurate, a real protection effect can be achieved on the air compressor, and surging of the air compressor is effectively prevented.
Wherein the set frequency threshold may be 300Hz.
In this embodiment, if the vibration frequency is greater than the set frequency threshold and the amplitude is greater than the set amplitude threshold, this means that the vibration amount of the air compressor in the high frequency region is large and the possibility of occurrence of surge is high. If the vibration frequency is greater than the set frequency threshold and the amplitude is less than or equal to the set amplitude threshold, it is indicated that the vibration amount of the air compressor in the high frequency region is small and insufficient to generate surge.
Optionally, the detection method further includes a step of determining a frequency threshold and an amplitude threshold, specifically:
the air compressor is controlled to work at different rotating speeds, and the gas flow and the gas pressure ratio of the air compressor are continuously adjusted; recording the surge frequency and the surge amplitude when the air compressor surges; a frequency threshold and an amplitude threshold are determined based on the surge frequency and the surge amplitude.
Specifically, the air compressor is controlled to work at different rotating speeds, the air flow of the air compressor is slowly reduced, the air pressure ratio of the air compressor is increased, the air compressor enters a surge state, and then the surge frequency and the surge amplitude of the air compressor are recorded when the air compressor just enters the surge state; the set frequency threshold value is slightly smaller than the surge frequency, and the amplitude threshold value is slightly smaller than the surge amplitude, so that the air compressor can be regulated before surge occurs, the air compressor is effectively prevented from surging, and damage to the air compressor is reduced. For example, the surge amplitude is S0, the amplitude threshold is S1, the amplitude is smaller than S0 during normal operation of the air compressor, the amplitude is larger than S0 when the air compressor is in surge, and in order to prevent the air compressor from entering a surge state in advance, S1 < S0 may be set, that is, when the amplitude has not reached S0 yet, the air pressure ratio starts to be reduced or the air flow rate starts to be increased.
The embodiment of the application also provides an anti-surge control method of the air compressor, which comprises an air compressor surge detection method and further comprises the following steps: if the air compressor is in surge, the air flow of the air compressor is increased and/or the air pressure of the air compressor is reduced.
In this embodiment, when it is detected that the air compressor may be about to surge, the gas pressure ratio may be reduced by reducing the gas pressure at the outlet of the air compressor. Wherein, can adjust the butterfly valve angle of air compressor machine and realize gas pressure's regulation. The butterfly valve angle can be determined according to the amplitude, so that the air compressor can be in a normal running state.
Fig. 4 is a flowchart of an anti-surge control method for an air compressor according to an embodiment of the present application, as shown in fig. 4, the control method includes:
step S410, obtaining the vibration frequency and the vibration amplitude of the air compressor.
Step S420, if the vibration frequency is larger than the set frequency threshold value and the amplitude is larger than the set amplitude threshold value, the air compressor is judged to surge.
Step S430, if the air compressor is in surge, the air flow of the air compressor is increased and/or the air pressure of the air compressor is reduced.
It can be understood that whether the air compressor is in surge or not is judged by the obtained vibration frequency and amplitude of the air compressor; if the magnitude of the vibration frequency and the magnitude of the amplitude indicate that the air compressor is in surge, the air flow of the air compressor is increased or the air pressure of the air compressor is reduced in time, or the air flow is increased and the air pressure is reduced, so that the air compressor is prevented from entering a surge state.
In this embodiment, when it is detected that the air compressor may be about to surge, the gas pressure ratio may be reduced by reducing the gas pressure at the outlet of the air compressor. The butterfly valve angle of the air compressor can be adjusted to adjust the gas pressure. The butterfly valve angle can be determined according to the amplitude, so that the air compressor can be in a normal running state.
Optionally, the step of increasing the gas flow rate of the air compressor includes:
the rotating speed of the air compressor is increased, and the opening of the bypass valve is increased.
In this embodiment, the rotational speed of the air compressor is increased, and the opening of the bypass valve is increased to increase the gas flow of the air compressor, so as to avoid the air compressor from entering a surge state, and simultaneously, the flow and the pressure of the gas required by the electric pile can be ensured.
In this embodiment, if the air compressor does not surge, the rotational speed of the air compressor and the opening degree of the bypass valve are not adjusted.
It is understood that the rotation speed is not adjusted so that the air compressor operates at the original rotation speed, and the opening degree of the bypass valve is not adjusted so that the flow required by the electric pile is not changed.
Optionally, the step of increasing the rotation speed of the air compressor includes:
determining a difference between the amplitude and an amplitude threshold; and controlling the air compressor to increase the rotating speed at the rising rate corresponding to the difference value, wherein different difference values correspond to different rising rates.
It is understood that a larger difference between the amplitude and the amplitude threshold value indicates a greater likelihood of surging the air compressor. Therefore, when the difference value is larger, the air compressor can be controlled to increase the rotating speed at a larger rate of rise; when the difference is smaller, the air compressor can be controlled to increase the rotating speed at a smaller rate of rise.
Based on the same inventive concept, the embodiment of the application further provides an air compressor surge detection device, and fig. 5 is a structural block diagram of the air compressor surge detection device provided by the embodiment of the application, as shown in fig. 5, the detection device 500 includes an acquisition module 510 and a judgment module 520.
An acquisition module 510, configured to acquire a vibration frequency and an amplitude of the air compressor;
the determining module 520 is configured to determine that the air compressor is in surge if the vibration frequency is greater than the set frequency threshold and the amplitude is greater than the set amplitude threshold.
Optionally, the detecting device 500 further includes a transforming module, configured to:
obtaining the vibration displacement of an air compressor; and carrying out Fourier transform on the vibration displacement to obtain the vibration frequency and the vibration amplitude of the air compressor.
Optionally, the detecting device 500 further includes a determining module, configured to:
controlling the air compressor to work at a set rotating speed, and continuously adjusting the gas flow of the air compressor;
recording the surge frequency and the surge amplitude when the air compressor surges;
a frequency threshold and an amplitude threshold are determined based on the surge frequency and the surge amplitude.
The embodiment of the application also provides an anti-surge control device of the air compressor, which comprises an air compressor surge detection device 500, fig. 6 is a block diagram of the anti-surge control device of the air compressor, and as shown in fig. 6, the control device 600 further comprises a control module 610.
The control module 610 is configured to increase the air flow rate of the air compressor and/or decrease the air pressure of the air compressor if the air compressor is in surge.
Optionally, the control module 610 further includes:
and the adjusting unit is used for increasing the rotating speed of the air compressor and increasing the opening degree of the bypass valve.
Optionally, the adjusting unit is further configured to:
determining a difference between the amplitude and an amplitude threshold;
and controlling the air compressor to increase the rotating speed at the rising rate corresponding to the difference value, wherein different difference values correspond to different rising rates.
It will be appreciated that the apparatus provided in the above embodiment is only exemplified by the division of the above functional modules, and in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules, so as to perform all or part of the functions described above.
Embodiments of the present application also provide an electronic device that may include a processor and a memory, where the processor and the memory may be communicatively coupled to each other via a bus or other means.
The processor may be a central processing unit (Central Processing Unit, CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits implementing embodiments of the present application.
The memory may include mass storage for data or instructions. By way of example, and not limitation, the memory may comprise a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the foregoing. The memory may include removable or non-removable (or fixed) media, where appropriate. The memory may be internal or external to the electronic device, where appropriate. In particular embodiments, the memory may be a non-volatile solid state memory.
In one example, the Memory may be a Read Only Memory (ROM). In one example, the ROM may be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.
The processor reads and executes the computer program instructions stored in the memory to implement any one of the air compressor surge detection method and the anti-surge control method in the above embodiments.
In one example, the electronic device may also include a communication interface and a bus. The processor, the memory and the communication interface are connected through a bus and complete communication with each other. The communication interface is mainly used for realizing communication among the modules, the devices, the units and/or the equipment in the embodiment of the application. The bus may include one or more buses, where appropriate.
In addition, in combination with the air compressor surge detection method and the anti-surge control method in the above embodiments, the embodiments of the present application may provide a computer readable storage medium. The computer readable storage medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the air compressor surge detection methods and anti-surge control methods of the above embodiments.
The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:
according to the air compressor surge detection method, the air compressor surge detection device, the air compressor surge prevention control method, the air compressor surge prevention control device and the air compressor surge detection medium, whether the air compressor surges or not can be judged through the vibration frequency and the vibration amplitude of the air compressor, and if the vibration frequency is larger than a set frequency threshold value and the vibration amplitude is larger than a set vibration amplitude threshold value, the air compressor surge is judged. The method is not influenced by environment, temperature and aging degree, so that the judgment of surge is more accurate, and the damage risk of the air compressor is reduced.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

Claims (10)

1. The surge detection method of the air compressor is characterized by comprising the following steps of:
acquiring vibration frequency and amplitude of an air compressor;
and if the vibration frequency is larger than a set frequency threshold value and the amplitude is larger than a set amplitude threshold value, judging that the air compressor is in surge.
2. The air compressor surge detection method of claim 1, wherein the detection method comprises:
obtaining the vibration displacement of the air compressor;
and carrying out Fourier transform on the vibration displacement to obtain the vibration frequency and the vibration amplitude of the air compressor.
3. The air compressor surge detection method of claim 1, wherein the detection method further comprises:
controlling the air compressor to work at different rotating speeds, and continuously adjusting the gas flow of the air compressor;
recording the surge frequency and the surge amplitude when the air compressor surges;
and determining the frequency threshold and the amplitude threshold according to the surge frequency and the surge amplitude.
4. The anti-surge control method of the air compressor comprises any one of the surge detection methods of the air compressor 1-3, and is characterized by further comprising the following steps:
and if the air compressor is judged to surge, increasing the gas flow of the air compressor and/or reducing the gas pressure of the air compressor.
5. The method of claim 4, wherein said increasing the gas flow of said air compressor comprises:
and increasing the rotating speed of the air compressor and increasing the opening of the bypass valve.
6. The method of claim 5, wherein said increasing the rotational speed of the air compressor comprises:
determining a difference between the amplitude and the amplitude threshold;
and controlling the air compressor to increase the rotating speed at the rising rate corresponding to the difference value, wherein different difference values correspond to different rising rates.
7. An air compressor surge detection device, characterized in that the detection device comprises:
the acquisition module is used for acquiring the vibration frequency and the vibration amplitude of the air compressor;
and the judging module is used for judging that the air compressor is in surge if the vibration frequency is larger than a set frequency threshold value and the amplitude is larger than a set amplitude threshold value.
8. The utility model provides an air compressor machine anti-surge controlling means, includes air compressor machine surge detection device, its characterized in that still includes:
and the control module is used for increasing the gas flow of the air compressor and/or reducing the gas pressure of the air compressor if the air compressor is in surge.
9. An electronic device, comprising: a memory and a processor in communication with each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of any of claims 1-6.
10. A computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-6.
CN202311203464.8A 2023-09-15 2023-09-15 Surge detection and anti-surge control method and device for air compressor Pending CN117090791A (en)

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CN202311203464.8A CN117090791A (en) 2023-09-15 2023-09-15 Surge detection and anti-surge control method and device for air compressor

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CN202311203464.8A CN117090791A (en) 2023-09-15 2023-09-15 Surge detection and anti-surge control method and device for air compressor

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