CN115467851B - A method for monitoring and preventing air compressor surge - Google Patents
A method for monitoring and preventing air compressor surge Download PDFInfo
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- CN115467851B CN115467851B CN202211148446.XA CN202211148446A CN115467851B CN 115467851 B CN115467851 B CN 115467851B CN 202211148446 A CN202211148446 A CN 202211148446A CN 115467851 B CN115467851 B CN 115467851B
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- air compressor
- vibration
- upper computer
- air
- turning
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000011156 evaluation Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
本发明涉及机械振动的测量，具体是一种监测和预防空压机喘振的方法，在空压机本体上加装振动传感器，在空压机的电机母线上加装电流表，在空压机出气口加装风量传感器和电控阀门，还包括适于在计算设备上运行并与振动传感器、电流表、风量传感器和电控阀门相连的上位机，并按照11个步骤进行监测和预防空压机喘振。与现有技术相比，本发明通过振动、电流和风量三个参考量进行综合评估，能防止误报喘振的问题发生，有效地避免高速离心空压机在喘振工况下运行，保护空压机自身安全及操控人员人身安全。
The present invention relates to the measurement of mechanical vibration, specifically a method for monitoring and preventing air compressor surge, which includes installing a vibration sensor on the air compressor body, installing an ammeter on the motor bus of the air compressor, installing an air volume sensor and an electric control valve on the air compressor outlet, and also includes a host computer suitable for running on a computing device and connected to the vibration sensor, the ammeter, the air volume sensor and the electric control valve, and monitoring and preventing air compressor surge according to 11 steps. Compared with the prior art, the present invention performs a comprehensive evaluation through three reference quantities of vibration, current and air volume, which can prevent the occurrence of false alarm surge problems, effectively avoid the high-speed centrifugal air compressor from operating under surge conditions, and protect the air compressor itself and the personal safety of the operator.
Description
Technical Field
The invention relates to measurement of mechanical vibration, in particular to a method for monitoring and preventing surge of an air compressor.
Background
When the air compressor is started, the air outlet is in a non-pressure state, low-frequency self-vibration can occur under the drive of the motor, after the air compressor is started, the pressure of the air outlet is increased, the low-frequency self-vibration is eliminated, the flow is reduced to lift the air pressure by gradually closing the valve to achieve higher output air pressure, but when the pressure of the air outlet exceeds the surge limit value of the air compressor, the air compressor is in a low-frequency large-amplitude vibration state, and the self safety of the air compressor and the personal safety of operators can be endangered.
Disclosure of Invention
In order to avoid the operation of the high-speed centrifugal air compressor under the surge working condition and protect the self safety of the air compressor and the personal safety of operators, the invention provides a method for monitoring and preventing the surge of the air compressor, which adopts the following technical scheme:
install vibration sensor additional on the air compressor machine stabilizer blade, install the ampere meter additional on the motor bus of air compressor machine, install air quantity sensor and automatically controlled valve additional at the air compressor machine gas outlet, still including being suitable for on computing equipment and with vibration sensor, ampere meter, air quantity sensor and automatically controlled valve continuous upper computer, monitor and prevent the air compressor machine surge according to following step:
S1, presetting a vibration limit value to an upper computer;
s2, starting an air compressor, and starting the air compressor to work;
S3, the ammeter monitors the current of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received current data;
s4, the vibration sensor monitors vibration of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received vibration data;
S5, the air quantity sensor monitors the air quantity of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received air quantity data;
S6, judging whether the current is reduced, if not, turning to S8, and if yes, turning to S9;
s7, judging whether the air outlet quantity is greatly reduced, if not, turning to S8, and if yes, turning to S10;
s8, the upper computer sends out an instruction, gradually reduces the opening of the electric control valve, and continues the pressurizing work;
s9, judging whether the current suddenly drops, if not, turning to S8, and if so, turning to S10;
s10, judging whether the vibration value exceeds the preset limit value of S1, if not, continuing to monitor the vibration value by S2, and if so, turning to S11;
and S11, the upper computer sends out a command, gradually increases the opening of the electric control valve until the vibration value is smaller than the preset limit value of S1, and then the monitoring is continued by S2.
Further, the preset vibration limit value in the step S1 is determined by the following method that before the air compressor leaves a factory, a vibration sensor is additionally arranged on a supporting leg of the air compressor, a manual valve is additionally arranged at an air outlet of the air compressor, the air compressor is started, after the air compressor normally operates, the opening degree of the manual valve is manually and gradually reduced, the air compressor is manually made to enter a surge area, and the vibration frequency corresponding to the surge area just entering the surge area is the vibration limit value.
Further, a vibration sensor is additionally arranged on each supporting leg of the air compressor, and when the upper computer judges whether the vibration value exceeds the preset limit value of S1, the vibration value is the average value of monitoring data transmitted by the vibration sensors.
Compared with the prior art, the invention carries out comprehensive evaluation through three reference amounts of vibration, current and air quantity, can prevent the problem of false alarm surge, effectively avoids the operation of the high-speed centrifugal air compressor under the surge working condition, and protects the self safety of the air compressor and the personal safety of operators.
Drawings
Fig. 1 is a schematic flow chart of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The inventor finds that in the idle process of the air compressor, the bus current of the motor of the air compressor can be increased along with the rotating speed, in the loading process after the rotating speed is stable, the bus current can be increased according to a parabolic curve, and reaches the maximum value of the bus current at a pressure value, after the pressure value, the bus current can be reduced, and the bus current can be greatly reduced before the surge point, and the slope can be greatly increased. Meanwhile, in the continuous pressure increasing process of the air compressor, the air quantity at the air outlet is continuously reduced, the reduction amplitude has a fixed slope, and when the slope fluctuates greatly, the air compressor enters a surge area. However, if the bus current drops greatly and/or the slope fluctuates greatly, the surge is not necessarily generated, and if the bus current drops greatly or the slope fluctuates greatly, the problem of false alarm is generated, so the invention also introduces the reference quantity of real-time vibration monitoring, and only 3 reference quantities are simultaneously provided, the real-time control is performed, thereby accurately monitoring and preventing the surge of the air compressor, and the air compressor is always in the optimal working condition.
The concrete method for monitoring and preventing the surging of the air compressor is that a vibration sensor is additionally arranged on each supporting leg of the air compressor, an ammeter is additionally arranged on a motor bus of the air compressor, an air quantity sensor and an electric control valve are additionally arranged at an air outlet of the air compressor, an upper computer is connected with the vibration sensor, the ammeter, the air quantity sensor and the electric control valve, and the upper computer is suitable for running on a computing device and is used for monitoring and preventing the surging of the air compressor according to the following steps:
the method for presetting the vibration limit value comprises the steps of additionally installing a vibration sensor on a support leg of an air compressor before the air compressor leaves a factory, additionally installing a manual valve at an air outlet of the air compressor, starting the air compressor, gradually reducing the opening of the manual valve manually after the air compressor normally operates, and enabling the air compressor to enter a surge area artificially, wherein the vibration frequency corresponding to the surge area just entering the surge area is the vibration limit value.
S2, starting an air compressor, and starting the air compressor to work;
S3, the ammeter monitors the current of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received current data;
s4, the vibration sensor monitors vibration of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received vibration data;
S5, the air quantity sensor monitors the air quantity of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received air quantity data;
S6, judging whether the current is reduced, if not, turning to S8, and if yes, turning to S9;
s7, judging whether the air outlet quantity is greatly reduced, if not, turning to S8, and if yes, turning to S10;
s8, the upper computer sends out an instruction, gradually reduces the opening of the electric control valve, and continues the pressurizing work;
s9, judging whether the current suddenly drops, if not, turning to S8, and if so, turning to S10;
S10, judging whether the vibration value exceeds a preset limit value of S1, if not, turning to S2 to continue monitoring, if so, turning to S11, wherein the vibration value is the average value of monitoring data transmitted by the vibration sensor on each supporting leg;
and S11, the upper computer sends out a command, gradually increases the opening of the electric control valve until the vibration value is smaller than the preset limit value of S1, and then the monitoring is continued by S2.
The details of this embodiment are not described in the prior art or common general knowledge in the art.
Claims (1)
1. The method for monitoring and preventing the surging of the air compressor is characterized in that a vibration sensor is additionally arranged on a body of the air compressor, an ammeter is additionally arranged on a motor bus of the air compressor, an air quantity sensor and an electric control valve are additionally arranged at an air outlet of the air compressor, and the method further comprises an upper computer which is suitable for running on computing equipment and is connected with the vibration sensor, the ammeter, the air quantity sensor and the electric control valve, and the surging of the air compressor is monitored and prevented according to the following steps:
S1, presetting a vibration limit value to an upper computer;
s2, starting an air compressor, and starting the air compressor to work;
S3, the ammeter monitors the current of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received current data;
s4, the vibration sensor monitors vibration of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received vibration data;
S5, the air quantity sensor monitors the air quantity of the air compressor, and transmits monitoring data to the upper computer in real time, and the upper computer processes the received air quantity data;
S6, judging whether the current is reduced, if not, turning to S8, and if yes, turning to S9;
s7, judging whether the air outlet quantity is greatly reduced, if not, turning to S8, and if yes, turning to S10;
s8, the upper computer sends out an instruction, gradually reduces the opening of the electric control valve, and continues the pressurizing work;
s9, judging whether the current suddenly drops, if not, turning to S8, and if so, turning to S10;
s10, judging whether the vibration value exceeds the preset limit value of S1, if not, continuing to monitor the vibration value by S2, and if so, turning to S11;
S11, the upper computer sends out a command, gradually increases the opening of the electric control valve until the vibration value is smaller than the preset limit value of S1, and then the monitoring is continued after S2;
The preset vibration limit value in the S1 is determined by the following method that before the air compressor leaves the factory, a vibration sensor is additionally arranged on the air compressor body, a manual valve is additionally arranged at the air outlet of the air compressor, the air compressor is started, after the air compressor normally operates, the opening degree of the manual valve is gradually reduced manually, the air compressor is manually made to enter a surge area, and the vibration frequency corresponding to the surge area just enters the surge area is the vibration limit value;
And a vibration sensor is additionally arranged on each body of the air compressor, and when the upper computer judges whether the vibration value exceeds the preset limit value of S1, the vibration value is the average value of monitoring data transmitted by the vibration sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211148446.XA CN115467851B (en) | 2022-09-21 | 2022-09-21 | A method for monitoring and preventing air compressor surge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211148446.XA CN115467851B (en) | 2022-09-21 | 2022-09-21 | A method for monitoring and preventing air compressor surge |
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| Publication Number | Publication Date |
|---|---|
| CN115467851A CN115467851A (en) | 2022-12-13 |
| CN115467851B true CN115467851B (en) | 2025-01-21 |
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| CN202211148446.XA Active CN115467851B (en) | 2022-09-21 | 2022-09-21 | A method for monitoring and preventing air compressor surge |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075749A (en) * | 2019-12-27 | 2020-04-28 | 湖南泛航智能装备有限公司 | Intelligent anti-surge device of ultrahigh-speed centrifugal fan |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002061593A (en) * | 2000-08-18 | 2002-02-28 | Mitsubishi Heavy Ind Ltd | Surge avoiding operation control system for compressor |
| 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 |
| CN204061256U (en) * | 2014-06-20 | 2014-12-31 | 三一能源重工有限公司 | A kind of surge measurement structure and compressor |
| EP3401524A4 (en) * | 2016-03-08 | 2018-12-26 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Surge avoidance control method and surge avoidance control device for exhaust turbine turbocharger |
| CN207989375U (en) * | 2018-03-23 | 2018-10-19 | 合肥欧也自动化科技有限公司 | A kind of preventing fan from surging device |
| CN210159582U (en) * | 2019-04-30 | 2020-03-20 | 金通灵科技集团股份有限公司 | Petroleum industry tail gas pressurization recovery system |
| CN213628117U (en) * | 2020-08-17 | 2021-07-06 | 四川锦宇装备有限公司 | Anti-surge system for valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075749A (en) * | 2019-12-27 | 2020-04-28 | 湖南泛航智能装备有限公司 | Intelligent anti-surge device of ultrahigh-speed centrifugal fan |
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| CN115467851A (en) | 2022-12-13 |
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