CN114109860B - Air compressor, air compressor control method and device, electronic equipment and storage medium - Google Patents
Air compressor, air compressor control method and device, electronic equipment and storage medium Download PDFInfo
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- CN114109860B CN114109860B CN202111321879.6A CN202111321879A CN114109860B CN 114109860 B CN114109860 B CN 114109860B CN 202111321879 A CN202111321879 A CN 202111321879A CN 114109860 B CN114109860 B CN 114109860B
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- air compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- 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
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- 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
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- 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
- F04D27/0253—Surge control by throttling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
Abstract
The invention relates to an air compressor, an air compressor control method, an air compressor control device, electronic equipment and a storage medium, wherein the air compressor control method comprises the following steps: in the disconnection state of the branch air supply pipe, acquiring a plurality of exhaust pressure values collected by the pressure sensor; determining whether the change conditions of the plurality of exhaust pressure values meet preset surge conditions or not; and if the variation condition of the exhaust pressure value meets a preset surge condition, controlling the opening of the air replenishing valve and/or increasing the valve opening of the exhaust valve. According to the embodiment of the invention, whether the air compressor surges or not is judged, and when the air compressor surges, the opening of the air replenishing valve is controlled to be opened and/or the opening of the exhaust valve is increased, so that the surge of the air compressor can be quickly and automatically judged and timely responded, the air compressor is quickly separated from the surge operation state, the continuous and stable operation of the air compressor is ensured, each structure of the air compressor is protected, and the service life of the air compressor is prolonged.
Description
Technical Field
The application relates to the technical field of air compressors, in particular to an air compressor, an air compressor control method, an air compressor control device, electronic equipment and a storage medium.
Background
The air compressor is generally referred to as an air compressor. An air compressor is a device for compressing gas. When the air compressor is in operation, the discharge pressure rises, the flow of the air compressor drops, and when the discharge pressure rises to a certain value, the suction flow of the air compressor drops rapidly, so that surging occurs.
When the air compressor surges, the blades can vibrate strongly due to strong pulsation and periodic oscillation of airflow, and the bearings and the blades can be damaged, so that serious accidents are caused.
Disclosure of Invention
In order to solve the technical problem that an air compressor generates surge and possibly damages a bearing and a blade, the application provides the air compressor, a control method and a control device of the air compressor, electronic equipment and a storage medium.
In a first aspect, the present application provides an air compressor, comprising: the air compressor comprises an air compressor main body and a branch air supplementing pipe, wherein one end of the branch air supplementing pipe is communicated with an air inlet of the air compressor main body, and the other end of the branch air supplementing pipe is communicated with an air outlet of the air compressor main body;
a pressure sensor and an exhaust valve are arranged at an exhaust port of the air compressor main body, an air supplement valve is arranged on the branch air supplement pipe, and the branch air supplement pipe is disconnected when the air supplement valve is in a closed state;
and when the branch air supply pipe is in a disconnected state, if the pressure sensor detects that the exhaust pressure value of the exhaust port meets a preset surge condition, the opening of the air supply valve is controlled and/or the opening of the exhaust valve is increased.
In a second aspect, the present application provides an air compressor control method for controlling an air compressor according to the first aspect, the air compressor control method comprising:
in the disconnection state of the branch air supply pipe, acquiring a plurality of exhaust pressure values collected by the pressure sensor;
determining whether the change conditions of the plurality of exhaust pressure values meet preset surge conditions;
and if the variation condition of the exhaust pressure value meets a preset surge condition, controlling the opening of the air replenishing valve and/or increasing the valve opening of the exhaust valve.
Optionally, the determining whether the variation of the plurality of exhaust pressure values satisfies a preset surge condition comprises:
carrying out frequency spectrum analysis on the plurality of exhaust pressure values to obtain pressure frequency spectrum signals;
determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range;
and if the fluctuation condition of the pressure frequency spectrum signal is outside a preset fluctuation range, determining that the change condition of the plurality of exhaust pressure values meets a preset surge condition.
Optionally, determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range includes:
extracting a frequency spectrum maximum value, a frequency spectrum minimum value and a frequency spectrum mean value from the pressure frequency spectrum signal;
subtracting the minimum frequency spectrum value from the maximum frequency spectrum value to obtain the fluctuation amplitude;
subtracting the minimum frequency spectrum value from the average frequency spectrum value to obtain deviation amplitude;
judging whether the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude;
and if the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude, determining that the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range.
Optionally, controlling the opening of the air make-up valve or increasing the valve opening of the exhaust valve comprises:
acquiring the current valve opening of the exhaust valve;
if the current valve opening of the exhaust valve is the maximum opening, the air supply valve is opened;
and if the current valve opening of the exhaust valve is not the maximum opening, increasing the valve opening of the exhaust valve.
Optionally, controlling the make-up air valve to open and increasing the valve opening of the vent valve comprises:
and if the control increases the valve opening of the exhaust valve and the increased valve opening of the exhaust valve is not the maximum opening, determining that the change condition of the exhaust pressure value meets the preset surge condition, and controlling the opening of the air supplementing valve and increasing the valve opening of the exhaust valve.
Optionally, controlling the opening of the air make-up valve or increasing the valve opening of the exhaust valve comprises:
acquiring first success rate of enabling the air compressor to be separated from a surge state through opening of the air compensating valve;
acquiring second power generation capacity for enabling the air compressor to be separated from a surge state by increasing the opening degree of the exhaust valve;
determining a first probability of selecting a mode of opening an air compensating valve and a second probability of selecting a mode of increasing the opening degree of an exhaust valve based on the first power forming rate and the second power forming rate;
and controlling the opening of the air replenishing valve or increasing the opening of the exhaust valve according to the first probability and the second probability.
In a third aspect, the present application provides an air compressor control device for controlling an air compressor according to the first aspect, the air compressor control device comprising:
the acquisition module is used for acquiring a plurality of exhaust pressure values acquired by the pressure sensor in a disconnected state of the branch air supply pipe;
the determining module is used for determining whether the change conditions of the plurality of exhaust pressure values meet the preset surge condition or not;
and the control module is used for controlling the opening of the air supplementing valve and/or increasing the valve opening of the exhaust valve if the change condition of the exhaust pressure value meets a preset surge condition.
Optionally, the determining module includes:
the frequency spectrum analysis unit is used for carrying out frequency spectrum analysis on the plurality of exhaust pressure values to obtain pressure frequency spectrum signals;
the first determination unit is used for determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range;
and the second determining unit is used for determining that the change conditions of the plurality of exhaust pressure values meet the preset surge condition if the fluctuation condition of the pressure spectrum signal is outside the preset fluctuation range.
Optionally, the first determining unit is configured to:
extracting a frequency spectrum maximum value, a frequency spectrum minimum value and a frequency spectrum mean value from the pressure frequency spectrum signal;
subtracting the minimum frequency spectrum value from the maximum frequency spectrum value to obtain the fluctuation amplitude;
subtracting the minimum value of the frequency spectrum from the average value of the frequency spectrum to obtain deviation amplitude;
judging whether the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude or not;
and if the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude, determining that the fluctuation condition of the pressure frequency spectrum signal is positioned outside a preset fluctuation range.
Optionally, the controlling module for controlling the opening of the air make-up valve or increasing the opening of the exhaust valve includes:
the first acquisition unit is used for acquiring the current valve opening of the exhaust valve;
the opening unit is used for opening the air supply valve if the current valve opening of the exhaust valve is the maximum opening;
and the increasing unit is used for increasing the valve opening of the exhaust valve if the current valve opening of the exhaust valve is not the maximum opening.
Optionally, the controlling module for controlling the opening of the air make-up valve and increasing the opening of the exhaust valve comprises:
and the first control unit is used for determining that the change situation of the exhaust pressure value meets a preset surge condition and controlling the opening of the air supplementing valve and increasing the valve opening of the exhaust valve if the control increases the valve opening of the exhaust valve and the increased valve opening of the exhaust valve is not the maximum opening.
Optionally, the controlling module for controlling the opening of the air make-up valve or increasing the opening of the exhaust valve includes:
the second acquisition module is used for acquiring first power generation capacity of enabling the air compressor to be separated from a surge state through opening of the air compensating valve;
the third acquisition module is used for acquiring second power generation capacity for enabling the air compressor to be separated from a surge state by increasing the opening degree of the exhaust valve;
a third determination unit for determining a first probability of selecting a manner of opening the air compensation valve and a second probability of selecting a manner of increasing the valve opening of the exhaust valve based on the first power generation rate and the second power generation rate;
and the second control unit is used for controlling the opening of the air replenishing valve or increasing the opening of the exhaust valve according to the first probability and the second probability.
In a fourth aspect, the present application provides an electronic device, which includes a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete mutual communication through the communication bus;
a memory for storing a computer program;
and the processor is used for realizing the air compressor control method of any one of the second aspect when executing the program stored in the memory.
In a fifth aspect, the present application provides a computer-readable storage medium having a program of the air compressor control method stored thereon, where the program of the air compressor control method is executed by a processor to implement the steps of the air compressor control method according to any one of the second aspects.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the embodiment of the invention, when the variation condition of the exhaust pressure value meets the preset surge condition, the opening of the air supplementing valve is controlled and/or the opening of the exhaust valve is increased, namely whether the air compressor surges or not is judged, and when the air compressor surges, the opening of the air supplementing valve is controlled and/or the opening of the exhaust valve is increased, so that the surge of the air compressor is quickly and automatically judged and responded in time, the air compressor is quickly separated from the surge operation state, the continuous and stable operation of the air compressor is ensured, each structure of the air compressor is protected, and the service life of the air compressor is prolonged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an air compressor provided in an embodiment of the present application;
fig. 2 is a flowchart of a control method of an air compressor according to an embodiment of the present disclosure;
fig. 3 is a structural diagram of an air compressor control device according to an embodiment of the present application;
fig. 4 is a structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
When the air compressor surges, airflow generates strong fluctuation and periodic oscillation, so that the blades can vibrate strongly, and the bearings and the blades can be damaged, thereby causing serious accidents. Therefore, the application provides the air compressor, the air compressor control method and device, the electronic equipment and the storage medium. The air compressor control method can be applied to a controller in the air compressor and also can be applied to an upper computer connected with the air compressor.
As shown in fig. 1, the air compressor provided by the embodiment of the present application includes: the air compressor comprises an air compressor main body 1 and a branch air supplementing pipe 2, wherein one end of the branch air supplementing pipe 2 is communicated with an air inlet of the air compressor main body 1, and the other end of the branch air supplementing pipe is communicated with an air outlet of the air compressor main body 1;
a pressure sensor 4 and an exhaust valve 5 are arranged at an exhaust port of the air compressor main body 1, an air supplement valve 3 is arranged on the branch air supplement pipe 2, and when the air supplement valve 3 is in a closed state, the branch air supplement pipe 2 is disconnected;
the pressure sensor 4 is used for detecting the exhaust pressure of an exhaust port of the air compressor main body and sending the detected exhaust pressure value to the controller or the upper computer; the exhaust valve 5 is arranged on the exhaust pipeline, and can adjust different opening degrees so as to control the exhaust pressure and the exhaust flow; the air supplement valve 3 is used for controlling the on-off of the branch air supplement pipe 2, the air supplement valve 3 is in a normally closed state, and when the air supplement valve 3 is opened, the air supplement function of an air outlet of the main body of the partial pressure machine on an air inlet of the main body of the partial pressure machine can be realized when the branch air supplement pipe 2 is communicated.
When the branch air supply pipe 2 is in a disconnected state, if the pressure sensor 4 detects that the exhaust pressure value of the exhaust port meets a preset surge condition, the air supply valve 3 is controlled to be opened and/or the valve opening of the exhaust valve 5 is increased.
The controller or the upper computer enables the air compensating valve 3 to be in a normally closed state by sending a first control instruction, obtains an exhaust pressure value detected by the pressure sensor 4, judges whether the exhaust pressure value meets a preset surge condition, sends a second control instruction to the air compensating valve 3 to open the air compensating valve 3 if the exhaust pressure value meets the preset surge condition, and/or sends a third control instruction to the exhaust valve 5 to increase the valve opening of the exhaust valve 5.
In practical application, the air compressor runs at a certain frequency, under normal working conditions, the air compensating valve 3 is in a closed state, all gas is exhausted from an exhaust port through an exhaust pipeline, and the exhaust pressure and the exhaust flow are adjusted by a controller or an upper computer by controlling the opening of the exhaust valve 5. In the operation process of the air compressor, the upper computer collects the pressure signal of the pressure sensor in real time and obtains the frequency spectrum signal of the pressure sensor.
In the opening adjusting process of the exhaust valve 5, if the exhaust pressure is in a steady state and no peak appears on a frequency spectrum signal of the pressure, the air compressor is in a steady operation state at present. If the valve opening is too small, the discharge pressure becomes too high, the intake flow rate decreases rapidly, the air compressor may surge due to insufficient intake, and the discharge pressure fluctuates periodically. At the moment, a frequency peak point appears on the frequency spectrum of the pressure signal, the exhaust pressure value of the exhaust port is determined to meet the preset surge condition, and the air compressor generates surge.
When the controller or the upper computer judges that the air compressor has surge, a signal is immediately sent to the air supply valve 3 and/or the exhaust valve 5, the air supply valve 3 is opened to conduct an air supply pipeline, and part of air in the exhaust pipe is supplied to the side of an air suction port, so that the air suction flow of the air compressor is increased; the opening of the exhaust valve 5 is rapidly increased, the exhaust pressure is reduced, and the air suction flow is increased. The two parts act independently or together, so that the air compressor is guaranteed to be rapidly separated from a surge state, and the air compressor is protected.
According to the embodiment of the invention, the branch air supply pipe communicated with the air outlet and the air inlet of the air compressor is arranged, and the air supply valve is arranged on the branch air supply pipe to control the on-off of the branch air supply pipe; set up pressure sensor on the blast pipe, confirm whether satisfy preset surge condition according to the exhaust pressure value of gas vent, also judge whether the air compressor machine takes place the surge promptly, when the air compressor machine takes place the surge, control tonifying qi valve is opened and/or the increase the valve aperture of discharge valve constitutes the anti-surge system, realizes judging the surge of air compressor machine fast, automatically and in time responding, makes the air compressor machine break away from the surge running state fast, guarantees that the air compressor machine lasts, steady operation, each structure of protection air compressor machine, extension air compressor machine life-span, this application can be used to multiple occasion such as the operation in-process of air compressor machine and air compressor machine test procedure.
In still another embodiment of the present invention, there is further provided an air compressor control method for controlling the air compressor according to the foregoing embodiment, as shown in fig. 2, the air compressor control method includes:
step S101, in a disconnected state of the branch air supply pipe 2, acquiring a plurality of exhaust pressure values acquired by a pressure sensor 4;
in the embodiment of the invention, the plurality of exhaust pressure values and the collection time of each exhaust pressure value can form an exhaust pressure value time sequence.
Step S102, determining whether the change conditions of the plurality of exhaust pressure values meet preset surge conditions;
in this step, it may be determined whether a preset surge condition is satisfied according to a fluctuation variation condition of the exhaust pressure values in the time sequence of the exhaust pressure values, if the fluctuation range of the exhaust pressure values is large, such as: the peak point appears, then can confirm to satisfy and predetermine surge condition, confirms that the air compressor machine appears the surge, if the fluctuation range of exhaust pressure value is less, if: and if no peak point occurs, determining that the preset surge condition is not met, and determining that the air compressor has no surge.
And step S103, if the change situation of the exhaust pressure value meets a preset surge condition, controlling the gulp valve 3 to be opened and/or increasing the valve opening of the exhaust valve 5.
In this step, if the variation of the discharge pressure value satisfies the preset surge condition, the air compressor can be quickly released from surge by using the method in 3, that is: controlling only the exhaust valve to be opened; only controlling and increasing the valve opening of the exhaust valve; or simultaneously controlling the opening of the air replenishing valve and increasing the valve opening of the exhaust valve.
According to the embodiment of the invention, when the variation condition of the exhaust pressure value meets the preset surge condition, the opening of the air supplementing valve is controlled and/or the opening of the exhaust valve is increased, namely whether the air compressor surges or not is judged, and when the air compressor surges, the opening of the air supplementing valve is controlled and/or the opening of the exhaust valve is increased, so that the surge of the air compressor is quickly and automatically judged and responded in time, the air compressor is quickly separated from the surge operation state, the continuous and stable operation of the air compressor is ensured, each structure of the air compressor is protected, and the service life of the air compressor is prolonged.
In another embodiment of the present invention, the step S102 of determining whether the variation of the plurality of exhaust pressure values satisfies the preset surge condition includes:
step 201, performing spectrum analysis on a plurality of exhaust pressure values to obtain pressure spectrum signals;
in the embodiment of the invention, a spectrum analysis method in the prior art can be utilized to perform spectrum analysis on a plurality of exhaust pressure values.
Step 202, determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range;
in the embodiment of the invention, the preset fluctuation range can be preset, and the preset fluctuation range can be obtained according to the fluctuation rule reflected by the pressure spectrum signals of a plurality of historically collected pressure values.
In this step, the fluctuation range of each point in the pressure spectrum signal may be compared with a preset fluctuation range, and if the fluctuation range is greater than the maximum value of the preset fluctuation range or less than the minimum value of the preset fluctuation range, it may be determined that the fluctuation condition of the pressure spectrum signal is outside the preset fluctuation range.
And step 203, if the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range, determining that the change condition of the plurality of exhaust pressure values meets a preset surge condition.
According to the embodiment of the invention, whether the fluctuation condition of the pressure spectrum signal is abnormal can be determined through the preset fluctuation range, so that whether the change condition of the plurality of exhaust pressure values meets the preset surge condition can be determined.
In another embodiment of the present invention, the step 202 of determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range includes:
step 301, extracting a frequency spectrum maximum value, a frequency spectrum minimum value and a frequency spectrum mean value from the pressure frequency spectrum signal;
step 302, subtracting the minimum value of the frequency spectrum from the maximum value of the frequency spectrum to obtain the fluctuation amplitude;
in the embodiment of the present invention, the maximum value of the spectrum is the maximum value of the spectrum signal, and the minimum value of the spectrum is the minimum value of the spectrum signal.
Illustratively, the maximum value of the spectrum is y max Minimum value of spectrum y min The fluctuation amplitude obtained by subtracting the minimum value of the frequency spectrum from the maximum value of the frequency spectrum is y max -y min 。
Step 303, subtracting the minimum value of the frequency spectrum from the average value of the frequency spectrum to obtain a deviation amplitude;
in the embodiment of the present invention, the spectrum average value is an average value of spectrum signals, and is exemplarily a spectrum average value
The deviation obtained by subtracting the minimum value of the frequency spectrum from the mean value of the frequency spectrum is
Step 304, judging whether the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude;
illustratively, the predetermined coefficient is an integer greater than 1, such as: 4, etc., whether the fluctuation amplitude is larger than the product of the preset coefficient and the deviation amplitude, may be (y) max -y min ) And with
Comparing, determining (y) max -y min ) Whether or not greater than
And 305, if the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude, determining that the fluctuation condition of the pressure spectrum signal is out of a preset fluctuation range.
If it is
Judging that a peak point appears on the frequency spectrum and judging that the air compressor surges at the moment.
In the foregoing embodiment, if the variation of the discharge pressure value satisfies the preset surge condition, the air compressor can be quickly released from surge by using the method in 3, that is: controlling only the exhaust valve to open; controlling to increase the valve opening of the exhaust valve only; or, the opening of the air replenishing valve and the increasing of the opening of the exhaust valve are controlled simultaneously, in addition, in order to be suitable for more scenes, a judgment whether the opening of the exhaust valve is the maximum opening may be added, in yet another embodiment of the present invention, the controlling of the air replenishing valve 3 to open or increase the opening of the exhaust valve 5 includes:
step 401, acquiring the current valve opening of the exhaust valve 5;
in the embodiment of the present invention, after the controller or the upper computer adjusts the valve opening of the exhaust valve 5 each time, the current valve opening can be recorded, so that the current valve opening of the exhaust valve 5 can be obtained in this step.
Step 402, if the current valve opening of the exhaust valve 5 is the maximum opening, the air supply valve 3 is opened;
in this step, since the valve opening of the exhaust valve 5 has the maximum value, when the current valve opening of the exhaust valve 5 is the maximum opening, the valve opening of the exhaust valve cannot be increased any more, and therefore, only the gulp valve 3 may be opened at this time.
In step 403, if the current valve opening of the exhaust valve 5 is not the maximum opening, the valve opening of the exhaust valve 5 is increased.
If the current valve opening of the exhaust valve 5 is not the maximum opening, it indicates that there is a space for continuously increasing the valve opening of the exhaust valve 5, and the valve opening of the exhaust valve 5 may be increased.
The embodiment of the invention increases the judgment of whether the current valve opening of the exhaust valve 5 is the maximum opening, so that when the exhaust valve 5 is the maximum opening, only the air compensating valve 3 is opened, the valve opening of the exhaust valve 5 does not need to be increased any more, and the problem that when the valve opening of the exhaust valve is only controlled to be increased, because the state of the exhaust valve 5 is not known, a control instruction is sent to the exhaust valve 5, the exhaust valve 5 is already the maximum opening, cannot be increased any more, the control instruction cannot be executed, and the air compressor cannot be separated from the surge state, so that the air compressor is damaged is avoided.
In another embodiment of the present invention, controlling the gulp valve 3 to open and increasing the valve opening of the exhaust valve 5 comprises:
and if the control increases the valve opening of the exhaust valve 5 and the increased valve opening of the exhaust valve 5 is not the maximum opening, determining that the change condition of the exhaust pressure value meets the preset surge condition, and controlling the gulp valve 3 to open and increase the valve opening of the exhaust valve 5.
According to the embodiment of the invention, after only controlling and increasing the valve opening of the exhaust valve, if the air compressor is still in a surge state, the opening of the air replenishing valve and the valve opening of the exhaust valve can be controlled, and the air replenishing valve and the exhaust valve can act together to ensure that the air compressor is quickly separated from the surge state and protect the air compressor.
In another embodiment of the present invention, controlling the gulp valve 3 to open or increase the valve opening of the exhaust valve 5 includes:
step 501, acquiring first power generation capacity for enabling the air compressor to be separated from a surge state by opening an air compensating valve 3;
in the embodiment of the invention, after the regulation and control are carried out by opening the air supplementing valve 3 in order to separate the air compressor from the surge state each time, whether the regulation and control successfully separate the air compressor from the surge state or not can be recorded, and the regulation and control success rate is calculated to obtain the first success rate.
Step 502, obtaining a second power generation rate for enabling the air compressor to be out of a surge state by increasing the valve opening of the exhaust valve 5;
in the embodiment of the invention, after the regulation and control can be carried out by increasing the opening degree of the exhaust valve in order to enable the air compressor to be out of the surge state each time, whether the regulation and control successfully enables the air compressor to be out of the surge state or not can be recorded, and the regulation and control success rate is calculated to obtain the second power generation rate.
Step 503, determining a first probability of selecting a mode of opening the air compensating valve 3 and a second probability of selecting a mode of increasing the valve opening of the exhaust valve 5 based on the first power forming rate and the second power forming rate;
in this step, the ratio of the first probability and the second probability may be calculated according to the first power cost and the second power cost, such as: the first power factor is 60%, the second power factor is 40%, then 60%/40% =6/4, then the first probability may be 0.6, and the second probability may be 0.4.
And step 504, controlling the gulp valve 3 to open or increase the valve opening of the exhaust valve 5 according to the first probability and the second probability.
In this step, the preset data range may be divided according to a first probability and a second probability, for example: the preset data range is 0-9, wherein 0-5 corresponds to a mode for controlling the opening of the air compensating valve 3, 6-9 corresponds to a mode for increasing the opening of the exhaust valve 5, any random number in 0-9 can be randomly generated, if the random number is 3, the mode for controlling the opening of the air compensating valve 3 is selected, and if the random number is 8, the mode for controlling the opening of the air compensating valve 3 is selected.
The embodiment of the invention can determine the first probability and the second probability according to the historical success rate of the mode of controlling the opening of the air replenishing valve and the mode of increasing the opening of the exhaust valve, and then select which mode to use to adjust the opening of the valve according to the probabilities.
In still another embodiment of the present invention, there is also provided an air compressor control device for controlling the air compressor according to the foregoing embodiment, as shown in fig. 3, the air compressor control device including:
the acquisition module 11 is configured to acquire a plurality of exhaust pressure values acquired by the pressure sensor 4 in a disconnected state of the branch gas supply pipe 2;
the determining module 12 is used for determining whether the change situation of the plurality of exhaust pressure values meets a preset surge condition;
and the control module 13 is used for controlling the air make-up valve 3 to open and/or increasing the valve opening of the exhaust valve 5 if the change situation of the exhaust pressure value meets the preset surge condition.
Optionally, the determining module includes:
the frequency spectrum analysis unit is used for carrying out frequency spectrum analysis on the plurality of exhaust pressure values to obtain pressure frequency spectrum signals;
the first determination unit is used for determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range;
and the second determining unit is used for determining that the change conditions of the plurality of exhaust pressure values meet the preset surge condition if the fluctuation condition of the pressure spectrum signal is outside the preset fluctuation range.
Optionally, the first determining unit is configured to:
extracting a frequency spectrum maximum value, a frequency spectrum minimum value and a frequency spectrum mean value from the pressure frequency spectrum signal;
subtracting the minimum frequency spectrum value from the maximum frequency spectrum value to obtain the fluctuation amplitude;
subtracting the minimum value of the frequency spectrum from the average value of the frequency spectrum to obtain deviation amplitude;
judging whether the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude or not;
and if the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude, determining that the fluctuation condition of the pressure frequency spectrum signal is positioned outside a preset fluctuation range.
Optionally, the controlling module, controlling the opening of the air make-up valve or increasing the opening of the exhaust valve, includes:
the first acquisition unit is used for acquiring the current valve opening of the exhaust valve;
the opening unit is used for opening the air supply valve if the current valve opening of the exhaust valve is the maximum opening;
and the increasing unit is used for increasing the valve opening of the exhaust valve if the current valve opening of the exhaust valve is not the maximum opening.
Optionally, the controlling module controls the opening of the air make-up valve and increases the opening of the exhaust valve, and includes:
and the first control unit is used for determining that the change situation of the exhaust pressure value meets a preset surge condition and controlling the opening of the air supplementing valve and increasing the valve opening of the exhaust valve if the control increases the valve opening of the exhaust valve and the increased valve opening of the exhaust valve is not the maximum opening.
Optionally, the controlling module, controlling the opening of the air make-up valve or increasing the opening of the exhaust valve, includes:
the second acquisition module is used for acquiring first power generation capacity for enabling the air compressor to be separated from a surge state through opening of the air supplementing valve;
the third acquisition module is used for acquiring second power which enables the air compressor to be separated from a surge state by increasing the opening degree of the exhaust valve;
a third determination unit for determining a first probability of selecting a manner of opening the air compensation valve and a second probability of selecting a manner of increasing the valve opening of the exhaust valve based on the first power generation rate and the second power generation rate;
and the second control unit is used for controlling the opening of the air replenishing valve or increasing the opening of the exhaust valve according to the first probability and the second probability.
In another embodiment of the present invention, an electronic device is further provided, which includes a processor 1110, a communication interface 1120, a memory 1130, and a communication bus 1140, wherein the processor, the communication interface 1120, and the memory 1130 complete communication with each other through the communication bus 1140;
a memory 1130 for storing computer programs;
the processor is configured to implement the air compressor control method according to any one of the foregoing method embodiments when the computer program stored in the memory 1130 is executed.
According to the electronic equipment provided by the embodiment of the invention, the processor executes the program stored in the memory to control the opening of the air supplementing valve and/or increase the valve opening of the exhaust valve when the change situation of the exhaust pressure value meets the preset surge condition, namely, judge whether the air compressor surges or not, and when the air compressor surges, the opening of the air supplementing valve and/or increase the valve opening of the exhaust valve is controlled, so that the surge of the air compressor can be quickly and automatically judged and responded in time, the air compressor is quickly separated from the surge operation state, the continuous and stable operation of the air compressor is ensured, each structure of the air compressor is protected, and the service life of the air compressor is prolonged.
The communication bus 1140 mentioned in the above electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 1140 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 4, but that does not indicate only one bus or one type of bus.
The communication interface 1120 is used for communication between the electronic device and other devices.
The memory 1130 may include a Random Access Memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The processor 1110 may be a general-purpose processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the integrated circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components.
In still another embodiment of the present invention, a computer-readable storage medium is further provided, which has a program of an air compressor control method stored thereon, and when the program of the air compressor control method is executed by a processor, the program of the air compressor control method realizes the steps of the air compressor control method according to any one of the foregoing method embodiments.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely illustrative of particular embodiments of the invention that enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A control method of an air compressor is characterized by being used for controlling the air compressor, and the air compressor comprises the following steps: the air compressor comprises an air compressor main body and a branch air supplementing pipe, wherein one end of the branch air supplementing pipe is communicated with an air inlet of the air compressor main body, and the other end of the branch air supplementing pipe is communicated with an air outlet of the air compressor main body; a pressure sensor and an exhaust valve are arranged at an exhaust port of the air compressor main body, an air supplement valve is arranged on the branch air supplement pipe, and the branch air supplement pipe is disconnected when the air supplement valve is in a closed state;
the air compressor control method comprises the following steps:
in the disconnection state of the branch air supply pipe, acquiring a plurality of exhaust pressure values acquired by a pressure sensor;
determining whether the change conditions of the plurality of exhaust pressure values meet preset surge conditions or not;
if the variation condition of the exhaust pressure value meets a preset surge condition, controlling the opening of the air replenishing valve or increasing the valve opening of the exhaust valve;
recording whether the air compressor is successfully separated from the surge state through the opening regulation of the air supply valve, and calculating the regulation success rate of the air compressor separated from the surge state to obtain first success rate;
recording whether the air compressor is successfully separated from the surge state by increasing the valve opening regulation of the exhaust valve, and calculating the regulation success rate of separating the air compressor from the surge state to obtain a second performance;
determining a first probability of selecting a mode of opening an air compensating valve and a second probability of selecting a mode of increasing the opening degree of an exhaust valve based on the ratio of the first power forming rate and the second power forming rate;
and selecting according to the first probability and the second probability, and further controlling the opening of the air replenishing valve or increasing the opening of the exhaust valve.
2. The air compressor control method of claim 1, wherein determining whether a change in the plurality of discharge pressure values satisfies a predetermined surge condition comprises:
carrying out spectrum analysis on the plurality of exhaust pressure values to obtain pressure spectrum signals;
determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range;
and if the fluctuation condition of the pressure frequency spectrum signal is outside a preset fluctuation range, determining that the change condition of the plurality of exhaust pressure values meets a preset surge condition.
3. The air compressor control method according to claim 2, wherein determining whether the fluctuation condition of the pressure spectrum signal is outside a preset fluctuation range comprises:
extracting a frequency spectrum maximum value, a frequency spectrum minimum value and a frequency spectrum mean value from the pressure frequency spectrum signal;
subtracting the minimum frequency spectrum value from the maximum frequency spectrum value to obtain the fluctuation amplitude;
subtracting the minimum value of the frequency spectrum from the average value of the frequency spectrum to obtain deviation amplitude;
judging whether the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude;
and if the fluctuation amplitude is larger than the product of a preset coefficient and the deviation amplitude, determining that the fluctuation condition of the pressure frequency spectrum signal is positioned outside a preset fluctuation range.
4. The utility model provides an air compressor machine controlling means which characterized in that for control air compressor machine, air compressor machine includes: the air compressor comprises an air compressor main body and a branch air supplementing pipe, wherein one end of the branch air supplementing pipe is communicated with an air inlet of the air compressor main body, and the other end of the branch air supplementing pipe is communicated with an air outlet of the air compressor main body; a pressure sensor and an exhaust valve are arranged at an exhaust port of the air compressor main body, an air supplement valve is arranged on the branch air supplement pipe, and the branch air supplement pipe is disconnected when the air supplement valve is in a closed state;
the air compressor control device includes:
the acquisition module is used for acquiring a plurality of exhaust pressure values acquired by the pressure sensor in a disconnected state of the branch air supply pipe;
the determining module is used for determining whether the change conditions of the plurality of exhaust pressure values meet preset surge conditions or not;
the control module is used for controlling the opening of the air supplementing valve or increasing the valve opening of the exhaust valve if the change situation of the exhaust pressure value meets a preset surge condition;
the determining module is further used for recording whether the air compressor is successfully separated from the surge state through the opening regulation of the air replenishing valve, and calculating the regulation success rate of the air compressor separated from the surge state to obtain first success rate;
the determining module is further used for recording whether the air compressor is successfully separated from the surge state by increasing the valve opening degree regulation of the exhaust valve, and calculating the regulation success rate of separating the air compressor from the surge state to obtain second finished power;
the determining module is further used for determining a first probability of selecting a mode of opening an air compensating valve and a second probability of selecting a mode of increasing the opening degree of an exhaust valve based on the proportion of the first power generation rate and the second power generation rate;
and the control module is also used for selecting according to the first probability and the second probability so as to control the opening of the air replenishing valve or increase the opening of the exhaust valve.
5. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the air compressor control method according to any one of claims 1 to 3 when executing the program stored in the memory.
6. A computer-readable storage medium, characterized in that a program of an air compressor control method is stored thereon, which when executed by a processor, implements the steps of the air compressor control method according to any one of claims 1 to 3.
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| CN206429370U (en) * | 2016-12-29 | 2017-08-22 | 武汉钢铁有限公司 | A kind of automatic compression device |
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| EP0024823A1 (en) * | 1979-08-22 | 1981-03-11 | Imperial Chemical Industries Plc | Compressor surge control method and apparatus |
| JP2004316462A (en) * | 2003-04-11 | 2004-11-11 | Ishikawajima Harima Heavy Ind Co Ltd | Method and device for controlling displacement of centrifugal compressor |
| CN102518598A (en) * | 2011-12-31 | 2012-06-27 | 北京时代科仪新能源科技有限公司 | Centrifugal air compressor and control method and system thereof |
| CN102635565B (en) * | 2012-03-30 | 2014-10-15 | 西安陕鼓动力股份有限公司 | Method for dynamically biasing anti-surge curve of turbine compressor |
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| CN103133386A (en) * | 2011-12-02 | 2013-06-05 | 诺沃皮尼奥内有限公司 | Method and equipment for detecting rotating stall and compressor |
| CN206429370U (en) * | 2016-12-29 | 2017-08-22 | 武汉钢铁有限公司 | A kind of automatic compression device |
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