CN2545370Y - Device for widening stable running zone of multi-stage axial-flow compressor - Google Patents
Device for widening stable running zone of multi-stage axial-flow compressor Download PDFInfo
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- CN2545370Y CN2545370Y CN 02238702 CN02238702U CN2545370Y CN 2545370 Y CN2545370 Y CN 2545370Y CN 02238702 CN02238702 CN 02238702 CN 02238702 U CN02238702 U CN 02238702U CN 2545370 Y CN2545370 Y CN 2545370Y
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- axial flow
- frequency sound
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Abstract
The utility model relates to a device for widening stable running zone of a multi-stage axial-flow compressor. A plurality of high frequency sound dynamic pressure sensors collect a dynamical stress signal when a compressor runs, and are in series connected with a signal preamplifier, a low pass filtering module, an analog-digital converter, a plurality of number value signal processors DSP, a digital to analog converter, a high frequency sound pressure conveying controlling valve, a pressure stabilization tank, a plurality of micro discharge rate electromagnetic controlling valve and a plurality of micro nozzles. The utility model controls less high pressure stream which is jetted by the micro nozzles, and consequently changes unsteady characteristic of the gas which flows in a moving blade passage, and defers the critical flow which correspond to occurrence of the phenomenon of rotating stall. The utility model has the advantages that based on that the utility model does not change the steady-state performance of the system, the running efficiency and the main structural parts of the compressor, the utility model widens the stable running zone of the multi-stage axial-flow compressor.
Description
Technical field
The utility model relates to a kind of device of widening gas compressor stable operation zone, refers in particular to the device of a kind of expanding multi-stage, axial flow gas compressor stable operation zone.
Background technique
Axial flow compressor is used in aeroengine and the industrial production in a large number.When multistage, axial flow compressor close on the stall border, variation has taken place in the non-linear coupling mechanism of inner suction surface boundary layer flow segregation phenomenon of blade path and stability couplings at different levels, under the inducing of system or local flow unstability factor, cause gas compressor to rotate the stall phenomenon, just, stall group appears in blade path inside, this class rotating stall group is with 60 40 percent to percent magnitude counter-rotating of rotor speed, the destruction that causes the inner proper flow rule of blade path.The destructiveness that is produced is mainly reflected in pressure ratio and sharply descends, and gas compressor low-frequency vibration phenomenon is serious.
Center on the mobile unstable phenomenon (surge and rotating stall) in the above-mentioned gas compressor running, carried out many ground-breaking research work over past ten years in the world.But present control mode all adopts passive control mode, i.e. the mode that final stage venting and casing are handled adopts on aeroengine and reduces fuel injection quantity, thereby reduces the mode of motor operating load.But this mode has reduced the operational efficiency of unit on the one hand, also has influence on the stable operation of system on the other hand, will cause system's generation surge when serious, causes catastrophic failure.From the application prospect of present rotating stall active control technology, because the limitation of the time variation of the high frequency sound of the robustness of its control mechanism, actuator and feedback control model has hindered the practical application of this technology on gas compressor.
The model utility content
The purpose of this utility model provides and is not a kind ofly influencing the range of flow of widening its stable operation under the situation of multistage, axial flow compressor operational efficiency, the device of expanding multi-stage, axial flow gas compressor stable operation zone.
For achieving the above object, the utility model provides the device of a kind of expanding multi-stage, axial flow gas compressor stable operation zone, comprising:
A plurality of high frequency sound dynamic pressure transducers, one is positioned at casing place multistage, axial flow compressor afterbody stator blade trailing edge, and all the other install one at each casing place, movable vane top;
A signal preamplifier is connected with these high frequency sound dynamic pressure transducer output terminals;
A low-pass filtering module is connected with the output terminal of this signal preamplifier;
An analog-digital converter is connected with the output terminal of this low-pass filtering module;
A plurality of numerical signal processor DSP (Digital Signal Processor) are connected with the output terminal of this analog-digital converter respectively in parallel, and the number of numerical signal processor is identical with high frequency sound dynamic pressure transducer number;
A digital to analog converter is connected jointly with the output terminal of above-mentioned these numerical signal processors;
A high frequency sound strength is carried control valve, electrically connects this digital to analog converter, in order to the flow of gas in the control tracheae;
One root timber matter is that the tracheae of Stainless Steel Tube is communicated with multistage, axial flow compressor, this high frequency sound strength is installed carries control valve, and that the air pipe inlet place is positioned at is multistage, the downstream of last row's stator blade of axial flow compressor;
A surge tank links to each other with the outlet port of this tracheae, draws the bronchus that a plurality of materials are Stainless Steel Tube, and the bronchus number is identical with high frequency sound dynamic pressure transducer number;
A plurality of little discharge rate solenoid electric valves electrically connect this digital to analog converter, are installed in respectively on these bronchuses, and each bronchus is installed one;
A plurality of micro nozzles are installed in these bronchial outlet ports respectively, are positioned at multistage, axial flow compressor first order movable vane leading edge place.
The device of above-mentioned expanding multi-stage, axial flow gas compressor stable operation zone, wherein said digital to analog converter are 16 figure place weighted-voltage D/A converters.
The device of above-mentioned expanding multi-stage, axial flow gas compressor stable operation zone, wherein said numerical signal processor DSP is the FFT Arithmetic Processing Chip.
By the device of above-mentioned expanding multi-stage, axial flow gas compressor stable operation zone as can be seen, the utility model has following advantage: utilize in multistage, axial flow compressor movable vane import leading edge and arrange the controllable air flow injection apparatus, spray the micrometeor high pressure draught and widen stability of a system operation area.Change the UNSTEADY FLOW feature (near the regularity of distribution of the dynamic loading separation trend in the flowing law of movable vane top leakage vortex, movable vane suction surface boundary layer, the movable vane top) of movable vane channel interior by the dynamic effect of little discharge rate air-flow, inhibition system and local flow unstability disturbance factor increase progressively trend, widen the system stability zone and improve the gas compressor pressure ratio.Be exactly in brief: on the basis that does not change systematic steady state characteristic, gas compressor operational efficiency, gas compressor main structural components, widened stable operation zone multistage, axial flow compressor.
Description of drawings
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is a control flow chart of the present utility model.
Embodiment
Be clearer description the utility model, present embodiment is an example with the level Four axial flow compressor.
As shown in Figure 1, 2, provide power by motor 20, level Four axial flow compressor 5 sucks gas, and flow through movable vane 6 and stator blade 6a gas are compressed, through the gas flow and the pressure of outlet regulating valve 7 control ejections.
Four high frequency sound dynamic pressure transducers 8,9,10,11, sensor are differential pressure type, the high frequency sound pressure transducers of the XCS-190 series of U.S. KULITE Sensitive Object production, and the sensor Dynamic response is 150KHz.Sensor 8,9,10 is installed in casing place, movable vanes at different levels top, and axial position is at the leading edge place of movable vane, and sensor 11 is installed on the casing of stator blade trailing edge of afterbody.Dynamic pressure signal when these high frequency sound dynamic pressure transducers are gathered the gas compressor operation; These high frequency sound dynamic pressure transducers are connected to a signal preamplifier 12 jointly, the signal input and the simulation that collect are amplified, maximum pressure value when the gain of signal preamplifier is selected with gas compressor stable operation is the upper limit, and CLV ceiling limit value is chosen on 4.5 volts the magnitude; The other end of this signal preamplifier 12 is connected to a low-pass filtering module 13, with high-frequency signal, white noise signal and control circuit self oscillations signal cutout and isolation, obtains to gather signal medium and low frequency pulsation feature; The other end of this low-pass filtering module 13 is connected to 16 analog-digital converters 14, and analog-signal transitions is become numerical signal; The other end of these 16 analog-digital converters has four road parallel branchs, be connected to four numerical signal processor DSP15,16,17,18, this numerical signal processor is selected the FFT Arithmetic Processing Chip for use, the numerical signal of Synchronization Analysis analog-digital converter 14 inputs, analyze the variation characteristic of mobile unstability tendency signal one order harmonics of gas compressor operating conditions, and finish the power spectrum of gathering signal and search for, if do not find to meet the requirement that preestablishes an order harmonic frequency amplitude, then do not send control signal, proceed the collection of the dynamic signal of gas compressor; After if the power spectrum search finishes, find to meet the requirement that preestablishes an order harmonic frequency amplitude, then according to predefined threshold values, send the control output signal; The other end of these numerical signal processors is connected to a digital to analog converter 19 jointly, and the numerical control signal transition is become simulation control output signal; The other end of this digital to analog converter 19 has five parallel branchs, and branch is connected to the high frequency sound strength and carries control valve 4, and all the other four branches are connected to four little discharge rate solenoid electric valves 2 (among the figure with a signal); This high frequency sound strength carries control valve 4 to be installed on the tracheae 21, and these tracheae 21 materials are Stainless Steel Tube.Air-flow behind high frequency sound strength conveying control valve 4 acknowledge(ment) signals in the control tracheae 21; Tracheae 21 is communicated with multistage, axial flow compressor, and that its ingress is positioned at is multistage, the downstream of last row's stator blade of axial flow compressor, to avoid too high flow disturbance; Tracheae 21 outlet ports connect a surge tank 3, this surge tank is drawn four bronchuses 22, these four bronchus 22 materials are Stainless Steel Tube, this surge tank 3 is according to the requirement of operating conditions, set the pressure stable value, high pressure draught is transported to little discharge rate solenoid electric valve 2 by bronchus, and this little discharge rate solenoid electric valve 2 just is installed on these bronchuses 22; Four micro nozzles 1 are installed in the bronchus outlet port respectively, micro nozzle 1 all is arranged in first order movable vane leading edge place, axial position is before movable vane, by control stream pressure and speed, make it to eject high pressure draught less than the micrometeor of the millesimal scope of gas compressor design discharge, thereby change the non-permanent feature of movable vane channel interior gas flow, realize the purpose in expanding multi-stage, axial flow compressor stable operation zone.
It all is components and parts that extensively adopt in machinery and control field that above-mentioned involved micro nozzle 1, little discharge rate solenoid electric valve 2, surge tank 3 and high frequency response strength carried control valve 4, and common engineers and technicians all can understand and mate.Wherein little discharge rate solenoid electric valve 2 is four solenoid electric valves, and its running principle is that the direct current square signal of accepting a 0-5 volt triggers solenoid valve work, makes it open little discharge rate solenoid electric valve by predefined aperture.The high frequency response strength carries control valve 4 running principles identical with it.
When axial flow compressor is other progression, increase or reduce the number of high frequency sound dynamic pressure transducer accordingly, the casing place of casing place, every grade of movable vane top and afterbody stator blade trailing edge installs one; Numerical signal processor DSP, little discharge rate solenoid electric valve 2, bronchus 22, micro nozzle 1 and electric connection circuit also increase or reduce number accordingly.
Claims (3)
1, the device of a kind of expanding multi-stage, axial flow gas compressor stable operation zone is characterized in that comprising:
A plurality of high frequency sound dynamic pressure transducers, one is positioned at casing place multistage, axial flow compressor afterbody stator blade trailing edge, and all the other install one at each casing place, movable vane top;
A signal preamplifier is connected with these high frequency sound dynamic pressure transducer output terminals;
A low-pass filtering module is connected with the output terminal of this signal preamplifier;
An analog-digital converter is connected with the output terminal of this low-pass filtering module;
A plurality of numerical signal processor DSP are connected with the output terminal of this analog-digital converter respectively in parallel, and the number of numerical signal processor is identical with high frequency sound dynamic pressure transducer number;
A digital to analog converter is connected jointly with the output terminal of above-mentioned these numerical signal processors;
A high frequency sound strength is carried control valve, electrically connects this digital to analog converter;
One root timber matter is that the tracheae of Stainless Steel Tube is communicated with multistage, axial flow compressor, this high frequency sound strength is installed carries control valve, and that the air pipe inlet place is positioned at is multistage, the downstream of last row's stator blade of axial flow compressor;
A surge tank links to each other with the outlet port of this tracheae, draws the bronchus that a plurality of materials are Stainless Steel Tube, and the bronchus number is identical with high frequency sound dynamic pressure transducer number;
A plurality of little discharge rate solenoid electric valves electrically connect this digital to analog converter, are installed in respectively on these bronchuses, and each bronchus is installed one;
A plurality of micro nozzles are installed in these bronchial outlet ports respectively, are positioned at multistage, axial flow compressor first order movable vane leading edge place.
2, the device of expanding multi-stage according to claim 1, axial flow gas compressor stable operation zone is characterized in that: wherein said digital to analog converter is 16 figure place weighted-voltage D/A converters.
3, the device of expanding multi-stage according to claim 1, axial flow gas compressor stable operation zone is characterized in that: wherein said numerical signal processor DSP is the FFT Arithmetic Processing Chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02238702 CN2545370Y (en) | 2002-06-13 | 2002-06-13 | Device for widening stable running zone of multi-stage axial-flow compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02238702 CN2545370Y (en) | 2002-06-13 | 2002-06-13 | Device for widening stable running zone of multi-stage axial-flow compressor |
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| Publication Number | Publication Date |
|---|---|
| CN2545370Y true CN2545370Y (en) | 2003-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02238702 Expired - Lifetime CN2545370Y (en) | 2002-06-13 | 2002-06-13 | Device for widening stable running zone of multi-stage axial-flow compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082344B (en) * | 2002-08-23 | 2010-06-16 | 约克国际公司 | Method for detecting rotating stall in a centrifugal compressor |
| CN102022351A (en) * | 2010-12-08 | 2011-04-20 | 北京航空航天大学 | Method for widening stable working range of high-load axial flow gas compressor |
-
2002
- 2002-06-13 CN CN 02238702 patent/CN2545370Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082344B (en) * | 2002-08-23 | 2010-06-16 | 约克国际公司 | Method for detecting rotating stall in a centrifugal compressor |
| CN102022351A (en) * | 2010-12-08 | 2011-04-20 | 北京航空航天大学 | Method for widening stable working range of high-load axial flow gas compressor |
| CN102022351B (en) * | 2010-12-08 | 2012-06-27 | 北京航空航天大学 | Method for widening stable working range of high-load axial flow gas compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120613 Granted publication date: 20030416 |