CN106678069B - The detection method that centrifugal compressor anti-surge occurs - Google Patents
The detection method that centrifugal compressor anti-surge occurs Download PDFInfo
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- CN106678069B CN106678069B CN201710145330.3A CN201710145330A CN106678069B CN 106678069 B CN106678069 B CN 106678069B CN 201710145330 A CN201710145330 A CN 201710145330A CN 106678069 B CN106678069 B CN 106678069B
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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
Abstract
The invention discloses centrifugal compressor anti-surge occur detection method, including 1. acquisition wheel nose pressure values and by pressure value transmission DSP data acquisition processing systems handled；Whether pressure value surge by computing judgement compressor and send data iatron to be stored the result after processing by 2.DSP data acquisition processing systems occurs；3. data iatron will store, data are shown by display interface and draw pressue-graph, and curve map compares when will occur with normal operation and surge, draws comparative result.4. curve aperiodicity fluctuates, then compressor operating is normal, and no surge occurs；There is abnormal period fluctuation in curve, then surge will occur for compressor；5. take measures to prevent surge.The present invention improves the speed and precision of measurement, judgement surge in centrifugal compressors phenomenon that can be promptly and accurately, avoids judgement not in time, the generation of inaccurate phenomenon.
Description
Technical field
The present invention relates to centrifugal compressor preventing surge technology field, occurs more particularly to centrifugal compressor anti-surge
Detection method.
Background technology
Centrifugal compressor is a kind of vane compressor, steady with aerodynamic quality compared with constant volume type compressor
The characteristics of fixed, with small vibration, noise is low.Centrifugal compressor is divided into the forms such as low speed multistage, high-speed, multi-stage, high speed single-stage.Tying
On structure, multistage high speed, multistage low-speed centrifugal formula compressor use motor direct-drive, multistage by way of impeller plural serial stage
Supercharging, single-stage high-speed centrifugal compressor need to improve wind pressure by way of speed increasing mechanism transmission.At present, centrifugal compressor is wide
It is general to be applied to the domestic and international industry such as major sewage disposal and petrochemical industry pharmacy.
Surge is shaking under a kind of damage that centrifugal compressor is occurred when flow is reduced to a certain extent
It is dynamic.Centrifugal compressor is a kind of form of turbo-compressor, and surge has very serious harm for centrifugal compressor,
Industrial safety and stability is seriously affected.Various mechanical properties after presently mainly being occurred by surge, gas
Dynamic characteristic goes to detect, searching problem the reason for occurring and proposes solution, but this method is remedying of being taken after surge occurs
Measure, can not prejudge surge in advance, can not also take appropriate measures when surge will occur for equipment
The generation of surge is avoided, therefore, it is necessary to take a kind of detection method that can be prejudged compressor in advance and surge occurs, to compressor
Surge is detected and is controlled by, so that the generation of pre- anti-surge.
The content of the invention
The purpose of the present invention is for can not be prejudged in advance to surge in the prior art, can not also take in advance
Measure avoids the problem that surge, there is provided the detection method that a kind of centrifugal compressor anti-surge occurs, this method by from
The mechanical property of (or early stage occurs for surge), aerodynamic characteristic when surge will occur for core type compressor, using being arranged on impeller chimney
Pressure sensor in housing measures wheel nose pressure value and sends DSP data acquisition processing systems to, is adopted by DSP data
Collect the high-speed data collecting and processing of processing system, finally form pressue-graph in data storage section, normally transported with compressor
Pressue-graph when row and surge will occur compares, and achievees the purpose that pre- anti-surge occurs.
To achieve these goals, present invention employs following technical scheme：
The detection method that centrifugal compressor anti-surge occurs, comprises the following steps：
The first step, pressure sensor is installed in compressor impeller case, obtains the pressure value of wheel nose and by institute
The pressure value of collection sends DSP data acquisition processing systems to, using DSP Quick Acquisition handle data capability, to data into
Row processing；
The pressure value collected is judged that centrifugal compressor is by second step, DSP data acquisition processing systems by computing
Result after processing is simultaneously sent data iatron to be stored by no generation surge by serial communication；
The data of storage are shown pressure value by display interface and draw out pressure by the 3rd step, data iatron
Curve map, pressue-graph when will occur with compressor normal operation and surge compare, and draw comparative result；
4th step, the pressue-graph when pressue-graph drawn out and normal operation compare, curve aperiodicity ripple
It is dynamic, then judge that compressor operating is normal, no surge occurs；There is abnormal period fluctuation in the pressue-graph curve drawn out,
Then judge that surge will occur for compressor；
5th step, surge will occur, and system sends alarm signal, and DSP data acquisition processing systems send control signal,
Take measures to prevent surge；
Pressure sensor in the step 1 is provided with two, is installed perpendicular to impeller chimney housing；
The pressure sensor is located on the same section of impeller chimney housing；
DSP data acquisition processing systems in the step 2 are handled the pressure value of collection, according to lower column operations
Method carries out computing：
The first step：The 1# sensor sample cycles are t0, and the T moment gathers pressure value PT, the T-t0 moment gathers pressure value and is
PT-to, it is P that the T+t0 moment, which gathers pressure value,T+t0, in pressure ascent stage PT-PT-t0Value must be more than zero or less than zero；Pressing
Power decline stage, PT-PT-t0Value must also be less than zero or more than zero, and remember the time value T of peak pointB, same method is successively
Go out adjacent several cycle peak point E, H, K ..., and time value TE、TH、TK..., and the difference for calculating them is respectively TE-B、
TH-E、TK-H..., 2# sensors are gathered by same processing, draw T(E-B)2、T(H-E)2、T(K-H)2..., if TE-B≈TH-E
≈TK-H≈ ..., T(E-B)2≈T(H-E)2≈T(K-H)2≈ ..., then carry out following judgement；
Second step：When centrifugal compressor is tested, value P1, the 2# sensor of 1# sensors under different rotating speeds is recorded in
Value P2, as reference, the undulating value of P1, P2 is more than record during experiment, if when centrifugal compressor is run, some when
The state at quarter, which meets the first step and also complies with second step, then judges surge.
Preferably, the bypass by compressor outlet pipeline is opened in the measure taken in the step 5 for operating personnel
Valve, prevents surge from further occurring.
Beneficial effects of the present invention：By setting pressure sensor in impeller cover, directly measure at wheel nose
Pressure value, the mechanical property in short-term and air dynamic behaviour of surge will occur by compressor, utilize DSP high speed acquisitions
Treatment characteristic, carries out high speed acquisition processing by gathered data, improves the speed and precision of measurement, judgement that can be promptly and accurately
Surge in centrifugal compressors phenomenon, avoids judgement not in time, the generation of inaccurate phenomenon.
Brief description of the drawings
Fig. 1 is the work flow diagram of the present invention；
Fig. 2 is pressure sensor scheme of installation；
Pressure change oscillogram when Fig. 3 is nominal situation；
Pressure change oscillogram when Fig. 4 is surging condition.
Reference numeral
In attached drawing, 1, air inlet pipe；2 impellers；3rd, pressure sensor；4th, DSP data acquisition processing systems；5th, data are deposited
Store up display；
Embodiment
The present invention is described in further details with reference to embodiment and attached drawing.
Referring to the detection method that shown in Fig. 1 and Fig. 2, centrifugal compressor anti-surge occurs, by connecting before the compressor
The air inlet pipe 1 at end, the impeller 2 being arranged in compressor chamber body, the pressure sensor 3 being arranged in compressor impeller case and
DSP data acquisition processing systems 4 and data iatron 5 are detected centrifugal compressor anti-surge, including following step
Suddenly：
The first step, pressure sensor 3 is installed in compressor impeller case, and the pressure value of 2 front end of acquisition impeller simultaneously will
The pressure value gathered sends DSP data acquisition processing systems 4 to and is handled；
The pressure value collected is judged that centrifugal compressor is by second step, DSP data acquisition processing systems 4 by computing
Result after processing is simultaneously sent data iatron 5 to be stored by no generation surge by serial communication；
The data of storage are shown pressure value by display interface and draw out pressure by the 3rd step, data iatron 5
Force curve figure, pressue-graph when will occur with compressor normal operation and surge compare, and draw comparative result.
4th step, the pressue-graph when pressue-graph drawn out and normal operation compare, curve aperiodicity ripple
It is dynamic, then judge that compressor operating is normal, no surge occurs；There is abnormal period fluctuation in the pressue-graph curve drawn out,
Then judge that surge will occur for compressor,
5th step, surge will occur, and system sends alarm signal, and DSP data acquisition processing systems send control signal,
Take measures to prevent surge.
In the present embodiment, it is compared for the ease of two groups of data of measurement more, more accurately judges whether that surge occurs,
The pressure sensor 3 is provided with two, is installed perpendicular to impeller chimney housing, and be arranged on same in impeller cover body
On section, ensure that the pressure for the surge pressure group that pressure sensor 3 senses is identical, it is ensured that the accuracy of measurement data.
In the present embodiment, the DSP data acquisition processing systems 4 are handled the pressure value of collection, and are detected
Whether pressure value, by contrast, judges whether and centrifugal compressor in periodically pulsing and the frequency of pulsation and direction
Mechanical property when will enter surging condition is consistent with air dynamic behaviour, so as to judge whether compressor will be breathed heavily
Shake.Computing is carried out according to following operation method：
The first step：The 1# sensor sample cycles are t0, and the T moment gathers pressure value PT, the T-t0 moment gathers pressure value and is
PT-to, it is P that the T+t0 moment, which gathers pressure value,T+t0, in pressure ascent stage PT-PT-t0Value must be more than zero or less than zero；Pressing
Power decline stage, PT-PT-t0Value must also be less than zero or more than zero, and remember the time value T of peak pointB, same method is successively
Go out adjacent several cycle peak point E, H, K ..., and time value TE、TH、TK..., and the difference for calculating them is respectively TE-B、
TH-E、TK-H..., 2# sensors are gathered by same processing, draw T(E-B)2、T(H-E)2、T(K-H)2..., if TE-B≈TH-E
≈TK-H≈ ..., T(E-B)2≈T(H-E)2≈T(K-H)2≈ ..., then carry out following judgement；
Second step：When centrifugal compressor is tested, value P1, the 2# sensor of 1# sensors under different rotating speeds is recorded in
Value P2, as reference, the undulating value of P1, P2 is more than record during experiment, if when centrifugal compressor is run, some when
The state at quarter, which meets the first step and also complies with second step, then judges surge.
As shown in Figure 3, Figure 4, pressure change oscillogram when Fig. 3 is centrifugal compressor normal operating conditions, before impeller 2
The pressure at end tends to be steady, and no larger waveform occurs.Fig. 4 is pressure change ripple when surge will occur for centrifugal compressor
Shape figure, when the early period of surge occurs for compressor, stall can occur for impeller 2, and the ripple of high frequency periodic occurs in 2 forefront pressure of impeller
It is dynamic, and pressure oscillation area can rotate counterclockwise, according to this characteristic, at 4 high speed acquisition of DSP data acquisition processing systems
The ability of data, high speed acquisition and the data for handling two pressure sensors 3 are managed, the data sensed to sensor compare
Compared with the fluctuation of this pressure cycle just can be measured, and the pressure value after processing is passed through serial ports by DSP data acquisition processing systems 4
The mode of communication sends data iatron 5 to, and draws out pressure curve, if it find that meeting pressure change ripple in Fig. 4
Surge rule shown by shape figure, then judge that surge will occur for centrifugal compressor, system sends alarm signal, DSP data
Acquisition processing system can send control signal, remind the by-passing valve opened by compressor outlet pipeline, prevent the further of surge
Occur.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the utility model is described in detail, however, those skilled in the art should understand that, can
Various changes are made to it in the form and details, the model that is limited without departing from claims of the present invention
Enclose.
Claims (2)
1. the detection method that centrifugal compressor anti-surge occurs, it is characterised in that comprise the following steps：
The first step, pressure sensor is installed in compressor impeller case, the pressure value of wheel nose is obtained and will be gathered
Pressure value send DSP data acquisition processing systems to, using DSP Quick Acquisition handle data capability, at data
Reason；
The pressure value collected is judged whether centrifugal compressor is sent out by second step, DSP data acquisition processing systems by computing
Result after processing is simultaneously sent data iatron to be stored by raw surge by serial communication；
The data of storage are shown pressure value by display interface and draw out pressure curve by the 3rd step, data iatron
Figure, pressue-graph when will occur with compressor normal operation and surge compare, and draw comparative result；
4th step, the pressue-graph when pressue-graph drawn out and normal operation compare, the fluctuation of curve aperiodicity, then
Judge that compressor operating is normal, no surge occurs；There is abnormal period fluctuation in the pressue-graph curve drawn out, then judges
Surge will occur for compressor；
5th step, surge will occur, and system sends alarm signal, and DSP data acquisition processing systems send control signal, take
Measure prevents surge；
Pressure sensor in the step 1 is provided with two, is installed perpendicular to impeller chimney housing；
The pressure sensor is located on the same section of impeller chimney housing；
DSP data acquisition processing systems in the step 2 are handled the pressure value of collection, according to following operation method
Carry out computing：
The first step：The 1# sensor sample cycles are t0, and the T moment gathers pressure value PT, it is P that the T-t0 moment, which gathers pressure value,T-to,T+
It is P that the t0 moment, which gathers pressure value,T+t0, in pressure ascent stage, PT-PT-t0Value must be more than zero or less than zero；Drop under stress
Stage, PT-PT-t0Value must also be less than zero or more than zero, and remember the time value T of peak pointB, same method draws adjacent successively
Several cycle peak point E, H, K ..., and time value TE、TH、TK..., and the difference for calculating them is respectively TE-B、TH-E、
TK-H..., 2# sensors are gathered by same processing, draw T(E-B)2、T(H-E)2、T(K-H)2..., if TE-B≈TH-E≈
TK-H≈ ..., T(E-B)2≈T(H-E)2≈T(K-H)2≈ ..., then carry out following judgement；
Second step：When centrifugal compressor is tested, the value of value P1, the 2# sensor of 1# sensors under different rotating speeds is recorded in
P2, as reference, the undulating value of P1, P2 are more than record when testing, if when centrifugal compressor is run, sometime
State, which meets the first step and also complies with second step, then judges surge.
2. the detection method that centrifugal compressor anti-surge according to claim 1 occurs, it is characterised in that：The step
The by-passing valve by compressor outlet pipeline is opened in the measure taken in five for operating personnel, prevents surge from further occurring.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107202028B (en) * | 2017-05-31 | 2019-03-29 | 北京理工大学 | A kind of turbocharger centrifugal compressor surge recognition methods |
| CN113624498B (en) * | 2020-05-09 | 2024-01-16 | 中国航发商用航空发动机有限责任公司 | Device, method and simulation system for measuring signal of pulse pressure sensor |
| CN113944650B (en) * | 2020-07-16 | 2024-03-19 | 麦克维尔空调制冷(武汉)有限公司 | Control method and control device of compressor and heat exchange system |
| CN114542501A (en) * | 2020-11-24 | 2022-05-27 | 麦克维尔空调制冷(武汉)有限公司 | Control method and control device of compressor and heat exchange system |
| CN113239956B (en) * | 2021-04-08 | 2024-01-19 | 深圳市银宝山新科技股份有限公司 | Injection mold state diagnosis method, device, computer equipment and storage medium |
| CN116447155A (en) * | 2022-01-10 | 2023-07-18 | 重庆美的通用制冷设备有限公司 | Method and device for detecting surge of compressor and electronic equipment |
| CN114688067B (en) * | 2022-04-12 | 2023-07-25 | 重庆美的通用制冷设备有限公司 | Method and device for detecting surge of compressor and electronic equipment |
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| NO324581B1 (en) * | 2006-01-26 | 2007-11-26 | Dynatrend As | Method and apparatus for determining when rotating stall is present in a compressor turbine blade II |
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| US5095714A (en) * | 1989-12-25 | 1992-03-17 | Daikin Industries, Ltd. | Surging prediction device for a centrifugal compressor |
| US5275528A (en) * | 1990-08-28 | 1994-01-04 | Rolls-Royce Plc | Flow control method and means |
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