CN108612664A - A kind of automatic detection of surge in centrifugal compressors, regulating system - Google Patents
A kind of automatic detection of surge in centrifugal compressors, regulating system Download PDFInfo
- Publication number
- CN108612664A CN108612664A CN201810417888.7A CN201810417888A CN108612664A CN 108612664 A CN108612664 A CN 108612664A CN 201810417888 A CN201810417888 A CN 201810417888A CN 108612664 A CN108612664 A CN 108612664A
- Authority
- CN
- China
- Prior art keywords
- surge
- noise
- compressor body
- plc controller
- regulating valve
- 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.)
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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
- F04D27/0292—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses a kind of automatic detections of surge in centrifugal compressors, regulating system, including compressor body, regulating valve, noise analyzer, PLC controller, admission line, discharge duct, regulating valve is in parallel with compressor body, noise analyzer is connect with compressor body, PLC controller respectively with noise analyzer, regulating valve, compressor body connects, the frequency of the decibels and noise that send out noise to compressor body by noise analyzer judges, if meeting the condition of surge, noise analyzer sends out alarm signal, and alarm signal is transferred to PLC controller；After PLC controller detects alarm signal, PLC controller sends out signal, regulating valve is opened to an initial opening A, the air-flow of discharge duct reaches admission line at this time, compressor body stops surge, and then, PLC controller sends out signal, the aperture of regulating valve is gradually turned down, until completely closing.
Description
Technical field
The present invention relates to automatic control technology fields, and in particular to a kind of automatic detection of surge in centrifugal compressors is adjusted
Section system.
Background technology
Centrifugal compressor is widely used in the industries such as oil, chemical industry, metallurgy, and safe and reliable operation is to industrial production
There is very important meaning.However, centrifugal compressor is more sensitive to the pressure of gas, flow, temperature change, easily breathe heavily
It shakes.Surge is a kind of intrinsic phenomenon of centrifugal compressor, and surge Producing reason is when centrifugal compressor flow is reduced to most
When small value, outlet pressure can decline suddenly, and manifold pressure is higher than outlet pressure instead, and then gas backflow returns in machine, until
Outlet pressure increases again to until pipeline gas；When the pressure recovery in pipeline is to original pressure, flow is again
It reduces, air in pipeline generates refluence again, a kind of unstable operating mode so generated in cycles, and unit will produce strongly
Vibration, be simultaneously emitted by abnormal pneumatic noise, surge has larger harmfulness, is that the main of centrifugal compressor damage lures
One of because.
Invention content
In order to solve the problems, such as surge in centrifugal compressors harmfulness, needing can be accurate in time when surge occurs for compressor
It really is detected, and takes rapid effective method that compressor is made to avoid surge area, come back to normal working condition,
The present invention proposes a kind of automatic detection of surge in centrifugal compressors, regulating system, and the present invention can detect compressor automatically
Surge and automatically adjust the parameter of compressor, to effectively enable compressor come back to stable operating status.
The object of the present invention is achieved like this：
A kind of automatic detection of surge in centrifugal compressors, regulating system, including compressor body, regulating valve, noise point
There is admission line, discharge duct, the regulating valve to connect air inlet by branch pipe for analyzer, PLC controller, the compressor body
Pipeline, discharge duct, formation is in parallel with compressor body, and the noise analyzer is connect with compressor body, for analyzing pressure
Contracting machine ontology sends out the decibels of noise and the frequency of noise, the PLC controller respectively with noise analyzer, regulating valve, pressure
Contracting machine ontology connects, and the automatic detection of compressor surge, adjusting method include the following steps：
The automatic detection of S1, compressor surge
The frequency of the decibels and noise that send out noise to compressor body by noise analyzer judges, if compression
Machine ontology sends out the condition that the decibels of noise meet surge with frequency simultaneously, and noise analyzer sends out alarm signal, and will
Alarm signal is transferred to PLC controller；
The automatic adjustment of S2, compressor surge
After PLC controller detects alarm signal, PLC controller sends out signal, and regulating valve is opened to one initially
Aperture A, initial opening A are less than full gate degree, and the air-flow of discharge duct directly reaches admission line by branch pipe, regulating valve at this time,
The pressure of discharge duct is set to decline, the flow of admission line increases, and eliminates the factor for causing surge, and compressor body stops asthma
It shakes, then, PLC controller sends out signal, and the aperture of regulating valve is gradually turned down, until completely closing, regulating valve completely closes
Afterwards, if surge no longer occurs for compressor body, that is, the automatic adjustment of surge is completed.
Preferably, in S2, if during closing regulating valve, surge, PLC controller hair occur again for compressor body
Go out signal, control valve opening is reopened to initial opening A, after machine ontology to be compressed stops surge, PLC controller sends out letter
Number, then again gradually turn down the aperture of regulating valve, until completely closing.
Preferably, in S1, if：The noise decibel number sent out when compressor body surge is Zc, frequency Fc；Compressor sheet
The noise decibel number sent out when body normal operation is Zy, frequency Fy；When meeting Zc >=Zy_max+5, Zy_max is compressor sheet
The maximum decibels of noise, 1≤Fc≤30 are sent out when body normal operation, and when Fy >=32, noise analyzer sends out alarm signal
Number.
Preferably, the regulating valve is butterfly valve.
Preferably, when the noise analyzer sends out alarm signal, it is simultaneously emitted by alarm, the automatic adjustment of surge is complete
Cheng Hou, PLC controller send out signal, and noise analyzer stopping sends out alarm.
Preferably, the initial opening A is less than full gate degree.
By adopting the above-described technical solution, the present invention has the advantages that：
The present invention is Automatic Control mode, and can be timely and accurately detected to surge and judge and make effectively
Regulation against surge, in this way one side can be accomplished unattended, liberate labour, avoid judging by accident because of human factor, another party
Face can to avoid mode is watched because of traditional shutdown caused by produce stopping, preventing the increase of various fringe costs, manpower and materials
Huge waste, it is especially more preferable to large-scale compressor unit effect.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the automatic overhaul flow chart of surge；
Fig. 3 is that surge automatically adjusts flow chart.
Reference numeral
In attached drawing, 1 is compressor body, and 2 be noise analyzer, and 3 be butterfly valve, and 4 be PLC rack, and 5 be admission line, and 6 be row
Feed channel, 7 be branch pipe.
Specific implementation mode
The automatic detection of surge in centrifugal compressors a kind of, regulating system structural schematic diagram are as shown in Figure 1, system is mainly wrapped
Include the compositions such as compressor body 1, noise analyzer 2, butterfly valve 3, PLC rack 4, admission line 5, discharge duct 6 and branch pipe 7, PLC rack
PLC controller is set in 4.Wherein, noise analyzer has the function of the frequency of the decibels of Analyze noise and noise；Butterfly valve is
One ratio adjusting valve, accurately controls the opening size of valve；PLC rack has with noise analyzer, butterfly valve, compressor body
Communication transfer signal.
The automatic testing principle of surge and method of compressor are as follows：
When surge occurs for compressor, abnormal pneumatic noise can be sent out, noise when comparing unit normal operation is much larger,
And the noise sent out when surge is usually low frequency (1~30Hz) noise, and the corresponding frequency of unit working speed is typically all height
Frequently, therefore, the decibels of noise and the frequency of noise can be judged by noise analyzer, if decibels and frequency are simultaneously
The condition for meeting surge, that is, transmit a signal to PLC rack, carries out the operation of next step.It is assumed that the noise decibel sent out when surge
Number is Zc, and noise decibel number when unit normal operation is Zy, and the frequency of noise is Fc when surge, unit Hz, and unit is normally transported
The frequency of noise is Fy, unit Hz when row, when meeting Zc >=Zy_max+5,1≤Fc≤30, and when Fy >=32, i.e. triggering alarm
Signal simultaneously beeps, and sends the alarm signal to PLC, the following Fig. 2 of particular flow sheet by noise analyzer.
The surge automatic principle of compensation and method of compressor are as follows：
When surge occurs for compressor, the air-flow in discharge duct can pour in down a chimney along spiral case and impeller to impeller inlet, therefore can
Discharge duct to be directly connected to admission line, air-flow is avoided to be recycled inside compressor.Specifically regulation flow process is：When
After PLC detects surge alarm signal, a signal is sent out immediately, and by the opening of butterfly valve 3 to certain initial opening A, (such as 50% is full
Aperture, specific aperture can be determined according to the related real-time parameter of compressor), the air-flow of compressor air-discharging pipeline directly passes through at this time
The aperture of valve reaches admission line, declines to the pressure of discharge duct, and the flow of admission line increases, and air-flow is just pressed normal
The case where when operation is the same to be compressed into outlet side by input end impeller of entering, and completes normal compression process.Work as discharge duct
In cause the factor of surge to be eliminated after, just the aperture of valve is gradually turned down, it is last fully closed, if surge no longer occurs, that is, complete
The automatic adjustment of surge eliminates alarm buzzer simultaneously；If during closing valve, surge occurs again for unit, at once by valve
Door aperture is adjusted to initial opening again, readjusts valve again after surge elimination, particular flow sheet is as shown in Figure 3.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (6)
1. a kind of automatic detection of surge in centrifugal compressors, regulating system, it is characterised in that：Including compressor body, adjust
There is admission line, discharge duct, the regulating valve to pass through branch for valve, noise analyzer, PLC controller, the compressor body
Pipe connects admission line, discharge duct, and formation is in parallel with compressor body, and the noise analyzer is connect with compressor body,
Send out the decibels of noise and the frequency of noise for analyzing compressor body, the PLC controller respectively with noise analyzer,
Regulating valve, compressor body connection, the automatic detection of compressor surge, adjusting method include the following steps：
The automatic detection of S1, compressor surge
The frequency of the decibels and noise that send out noise to compressor body by noise analyzer judges, if compressor sheet
Body sends out the condition that the decibels of noise meet surge with frequency simultaneously, and noise analyzer sends out alarm signal, and will alarm
Signal transmission is to PLC controller；
The automatic adjustment of S2, compressor surge
After PLC controller detects alarm signal, PLC controller sends out signal, and regulating valve is opened to an initial opening
A, at this time the air-flow of discharge duct directly by branch pipe, regulating valve reach admission line, so that the pressure of discharge duct is declined, air inlet
The flow of pipeline increases, and eliminates the factor for causing surge, and compressor body stops surge, and then, PLC controller sends out signal,
The aperture of regulating valve is gradually turned down, until completely closing, after regulating valve completely closes, if compressor body is no longer breathed heavily
It shakes, that is, completes the automatic adjustment of surge.
2. a kind of automatic detection of surge in centrifugal compressors according to claim 1, regulating system, it is characterised in that：
In S2, if during closing regulating valve, surge occurs again for compressor body, and PLC controller sends out signal, by regulating valve
Aperture is reopened to initial opening A, and after machine ontology to be compressed stops surge, PLC controller sends out signal, then will adjust again
The aperture of valve gradually turns down, until completely closing.
3. a kind of automatic detection of surge in centrifugal compressors according to claim 1, regulating system, it is characterised in that：
In S1, if：The noise decibel number sent out when compressor body surge is Zc, frequency Fc；It is sent out when compressor body normal operation
The noise decibel number gone out is Zy, frequency Fy；When meeting Zc >=Zy_max+5, Zy_max is sent out when being compressor body normal operation
Go out the maximum decibels of noise, 1≤Fc≤30, and when Fy >=32, noise analyzer sends out alarm signal.
4. a kind of automatic detection of surge in centrifugal compressors according to claim 1, regulating system, it is characterised in that：
The regulating valve is butterfly valve.
5. a kind of automatic detection of surge in centrifugal compressors according to claim 1, regulating system, it is characterised in that：
When the noise analyzer sends out alarm signal, it is simultaneously emitted by alarm, after the completion of the automatic adjustment of surge, PLC controller
Signal is sent out, noise analyzer stopping sends out alarm.
6. a kind of automatic detection of surge in centrifugal compressors according to claim 1, regulating system, it is characterised in that：
The initial opening A is less than full gate degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810417888.7A CN108612664A (en) | 2018-05-04 | 2018-05-04 | A kind of automatic detection of surge in centrifugal compressors, regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810417888.7A CN108612664A (en) | 2018-05-04 | 2018-05-04 | A kind of automatic detection of surge in centrifugal compressors, regulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108612664A true CN108612664A (en) | 2018-10-02 |
Family
ID=63662067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810417888.7A Withdrawn CN108612664A (en) | 2018-05-04 | 2018-05-04 | A kind of automatic detection of surge in centrifugal compressors, regulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108612664A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925233A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Compressor surge fault diagnosis method based on acoustic signals |
| CN114754020A (en) * | 2022-04-18 | 2022-07-15 | 合肥通用机械研究院有限公司 | Compressor surge monitoring system and monitoring method based on intake noise characteristics |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3605958A1 (en) * | 1986-02-25 | 1987-09-03 | Fraunhofer Ges Forschung | Device for detecting and eliminating separation vibrations on compressor blades |
| JPH04301200A (en) * | 1991-03-29 | 1992-10-23 | Hitachi Ltd | Control method of surging of fluid machinery |
| CN101178074A (en) * | 2006-11-08 | 2008-05-14 | 财团法人工业技术研究院 | Pre-judging method for compressor surge |
| CN101629572A (en) * | 2008-07-18 | 2010-01-20 | 通用电气公司 | Stall and surge detection system and method |
| CN105626566A (en) * | 2011-10-03 | 2016-06-01 | 株式会社Ihi | Centrifugal compressor machine and method for preventing surge therein |
-
2018
- 2018-05-04 CN CN201810417888.7A patent/CN108612664A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3605958A1 (en) * | 1986-02-25 | 1987-09-03 | Fraunhofer Ges Forschung | Device for detecting and eliminating separation vibrations on compressor blades |
| JPH04301200A (en) * | 1991-03-29 | 1992-10-23 | Hitachi Ltd | Control method of surging of fluid machinery |
| CN101178074A (en) * | 2006-11-08 | 2008-05-14 | 财团法人工业技术研究院 | Pre-judging method for compressor surge |
| CN101629572A (en) * | 2008-07-18 | 2010-01-20 | 通用电气公司 | Stall and surge detection system and method |
| CN105626566A (en) * | 2011-10-03 | 2016-06-01 | 株式会社Ihi | Centrifugal compressor machine and method for preventing surge therein |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925233A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Compressor surge fault diagnosis method based on acoustic signals |
| CN114754020A (en) * | 2022-04-18 | 2022-07-15 | 合肥通用机械研究院有限公司 | Compressor surge monitoring system and monitoring method based on intake noise characteristics |
| CN114754020B (en) * | 2022-04-18 | 2024-02-02 | 合肥通用机械研究院有限公司 | Compressor surge monitoring system and monitoring method based on intake noise characteristics |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181002 |
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| WW01 | Invention patent application withdrawn after publication |