CN102707739A - Working state control system and control method for pumping oil supply simulation chamber - Google Patents
Working state control system and control method for pumping oil supply simulation chamber Download PDFInfo
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- CN102707739A CN102707739A CN2012101886487A CN201210188648A CN102707739A CN 102707739 A CN102707739 A CN 102707739A CN 2012101886487 A CN2012101886487 A CN 2012101886487A CN 201210188648 A CN201210188648 A CN 201210188648A CN 102707739 A CN102707739 A CN 102707739A
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Abstract
The invention belongs to the technical field of aviation, and relates to a working state control system and a working state control method for a pumping oil supply simulation chamber. The control system comprises an air inlet electro-hydraulic servo regulating valve, an air exhaust electro-hydraulic servo regulating valve, a magnetostrictive liquid level sensor, an electric centrifugal pump, a computer control system and corresponding connecting pipelines. The control method comprises the following steps that: air pressure in the simulation chamber is regulated, so that the inlet pressure or flow of a low-pressure pump of an engine meets simulation requirements; fuel oil enters the simulation chamber from an oil supply pipeline to raise an oil level; when the oil level is raised to the highest point, the magnetostrictive liquid level sensor and the computer control system jointly starts the electric centrifugal pump to discharge the oil; when the oil level is lowered to the lowest point, the magnetostrictive liquid level sensor and the computer control system jointly stops the electric centrifugal pump to stop discharging the oil; and in the whole test process, the oil level in the simulation chamber is repeated between the highest point and the lowest point to keep a pumping oil supply working state. Problems about the simulation of low-pressure pumping oil supply test conditions of a plurality of engines are solved.
Description
Technical field
The invention belongs to the aeronautical technology field, relate to a kind of suction fuel feeding simulation box operation status control system and control method thereof.
Background technology
Usually, the simulation of the aircraft fuel system suction fuel feeding test condition cover simulation device realization formed by a simulation box, a cover computer measurement and control system (comprising hardware, software two parts), hydraulic oil source, pumped vacuum systems and system pipeline.Wherein simulation box is used for simulated engine (or APU) low-lift pump inlet pressure or flow, and the fuel oil that flows out from engine (or APU) low-lift pump porch when taking up the test of suction fuel feeding.This just requires in whole aircraft fuel system suction fuel feeding simulation test procedure, and simulation box remains existing certain gas-phase space can carry this duty of fuel oil that flows into continually wherein again.For large aircraft, need simulate many engines and APU suction fuel feeding state simultaneously, and the suction fuel supply flow rate of every engine reaches thousands of kg/h, at least 1 hour whole test duration.Because the space, test site is limited, this simulation box volume is limited, can not be infinitely great, if effectively do not control, fuel oil can be full of simulation box very soon in test when not finishing as yet.
Summary of the invention
The objective of the invention is: a kind of control system that can make the limited simulation box of volume keep big flow suction fuel feeding duty for a long time is provided.
In addition, the present invention also provides a kind of control method of aspirating fuel feeding simulation box duty.
The technical scheme that the present invention takes is: a kind of suction fuel feeding simulation box operation status control system; It comprises air inlet electro-hydraulic servo variable valve, the electro-hydraulic servo variable valve of bleeding, magnetostriction type level sensing, electric centrifugal pump, ball valve, flowmeter, oil pressure sensor, computer control system and corresponding connecting line; Wherein, Air inlet electro-hydraulic servo variable valve is installed in the simulation box top with the electro-hydraulic servo variable valve of bleeding; The directly logical atmosphere of air inlet electro-hydraulic servo variable valve, the electro-hydraulic servo variable valve of bleeding links to each other with pumped vacuum systems; Said magnetostriction type liquid level sensor is vertically mounted on the simulation box top, and its measuring staff length equals the height of simulation box at least, and measuring staff is provided with the ball float that variation along with liquid level fluctuates and can produce corresponding current signal; Said electric centrifugal pump is arranged on the simulation box bottom, and its inlet port is positioned at simulation box, and the oil pump outlet is communicated with return line, and the pump oil mass is greater than the oil feed line oil inlet quantity; Said computer control system and air inlet electro-hydraulic servo variable valve, bleed electro-hydraulic servo variable valve and engine suction fuel feeding simulation pipeline link to each other the formation closed-loop control; In addition, computer control system links to each other with magnetostriction type liquid level sensor and electric centrifugal pump, constitutes closed-loop control.
Said every engine suction fuel feeding simulation pipeline is formed by ball valve, flowmeter, oil pressure sensor and oil feed line; Ball valve one end links to each other with simulation box; One end links to each other with the flowmeter outlet; The flowmeter import links to each other with the engine low-lift pump inlet end of oil feed line, and oil pressure sensor is installed in engine low-lift pump porch, and flowmeter all links to each other with computer control system with oil pressure sensor.
Fuel level is provided with two reference mark in the simulation box: the oil level highs and lows, and wherein, the above gas-phase space volume of oil level peak is at least 3% of simulation box total measurement (volume); The pasta of oil level minimum point is higher than electric centrifugal pump inlet port 50mm at least.
When many engine suction fuel feeding states of needs simulation and its state consistency, every engine suction fuel feeding simulation pipeline is merged at the end of ball valve near simulation box, so only need a simulation box just can simulate many engine suction fuel feeding states;
A kind of suction fuel feeding simulation box duty control method, it comprises the steps:
Step 1: regulate the simulation box internal gas pressure
Make engine low-lift pump inlet pressure or flow satisfy the simulation requirement;
Step 2: fuel oil gets into simulation box from oil feed line, and oil level rises;
Step 3: when the simulation box oil level rises to peak, send the current corresponding signal to computer control system, start electric centrifugal pump 4, the fuel oil in the simulation box is discharged by electric centrifugal pump by computer control system by magnetostriction type liquid level sensor 3;
Step 4: because electric centrifugal pump pump oil mass is greater than the oil inlet quantity of oil feed line; Therefore oil level constantly descends; When oil level drops to minimum point; Send the current corresponding signal by the magnetostriction type liquid level sensor to computer control system, close electric centrifugal pump, stop to drain the oil by computer control system;
Step 5: however under the continuous oil-feed of oil feed line, oil level constantly rises in the simulation box; During to peak, drained the oil by the computer control electric centrifugal pump, so circulation repeatedly again; Thereby in whole experiment, keep big flow suction fuel feeding duty.
Advantage of the present invention is: the present invention makes suction fuel feeding simulation box leave certain gas-phase space all the time in long-time process of the test; Can many engines of real time modelling (or APU) low-lift pump inlet pressure; Can load again and in time emit the fuel oil in the continuous inflow simulation box, the limited and very big difficult problem of suction fuel supply flow rate of the simulation box volume that has run into when having solved big aircraft fuel system suction fuel feeding test.
Description of drawings
Fig. 1 aspirates fuel feeding simulation box operation status control system synoptic diagram for the present invention;
Fig. 2 aspirates the process flow diagram of fuel feeding simulation box duty control method for the present invention,
Wherein, bleed electro-hydraulic servo variable valve, 3-magnetostriction type liquid level sensor, 4-electric centrifugal pump, 5-ball valve, 6-flowmeter, 7-oil pressure sensor of 1-air inlet electro-hydraulic servo variable valve, 2-.
Embodiment
Specify embodiment of the present invention below in conjunction with accompanying drawing:
See also accompanying drawing 1, it is that the present invention aspirates fuel feeding simulation box operation status control system synoptic diagram.Said suction fuel feeding simulation box operation status control system comprises air inlet electro-hydraulic servo variable valve 1, the electro-hydraulic servo variable valve 2 of bleeding, magnetostriction type level sensing 3, electric centrifugal pump 4, ball valve 5, flowmeter 6, oil pressure sensor 7, computer control system and corresponding connecting line; Wherein, Air inlet electro-hydraulic servo variable valve 1 is installed in the simulation box top with the electro-hydraulic servo variable valve 2 of bleeding; The directly logical atmosphere of air inlet electro-hydraulic servo variable valve 1, the electro-hydraulic servo variable valve 2 of bleeding links to each other with pumped vacuum systems; Said magnetostriction type liquid level sensor 3 is vertically mounted on the simulation box top, and its measuring staff length equals the height of simulation box at least, and measuring staff is provided with the ball float that variation along with liquid level fluctuates and can produce corresponding current signal; Said electric centrifugal pump 4 is arranged on the simulation box bottom, and its inlet port is positioned at simulation box, and the oil pump outlet is communicated with return line, and the pump oil mass is greater than the oil feed line oil inlet quantity; Said every engine suction fuel feeding simulation pipeline is formed by ball valve 5, flowmeter 6, oil pressure sensor 7 and oil feed line; Ball valve 5 one ends link to each other with simulation box; One end links to each other with flowmeter 6 outlets; Flowmeter 6 imports link to each other with the engine low-lift pump inlet end of oil feed line, and oil pressure sensor 7 is installed in engine low-lift pump porch; Said computer control system links to each other with oil pressure sensor 7 with air inlet electro-hydraulic servo variable valve 1, the electro-hydraulic servo variable valve 2 of bleeding, flowmeter 6, and constitutes closed-loop control; In addition, computer control system links to each other with magnetostriction type liquid level sensor 3 and electric centrifugal pump 4, constitutes closed-loop control.
The present invention aspirates electric centrifugal pump 4 startups of fuel feeding simulation box operation status control system and the restriction that normal running conditions does not receive environmental pressure, and its pump oil flow is greater than the summation of many engines suction fuel supply flow rates.In addition, fuel level is provided with two reference mark in the suction fuel feeding simulation box: the oil level highs and lows.Wherein, confirming of oil level peak: the above gas-phase space volume of this oil level is at least 3% of simulation box total measurement (volume).Confirming of oil level minimum point: the pasta of this oil level is higher than electric centrifugal pump 4 inlet port 50mm at least.
Like this, in aircraft fuel system suction fuel feeding process of the test, when the fuel level that flows to simulation box arrived peak, computer control system started electric centrifugal pump 4, and the fuel oil in the simulation box is drained; When oil level drops to minimum point, computer control system is closed electric centrifugal pump 4, causes oil pump to be done changeing impaired in case its inlet port exposes pasta.Therefore the present invention makes suction fuel feeding simulation box leave certain gas-phase space all the time in long-time process of the test; Can many engines of real time modelling (or APU) low-lift pump inlet pressure; Can load again and in time emit the fuel oil in the continuous inflow simulation box, the limited and very big difficult problem of suction fuel supply flow rate of the simulation box volume that has run into when having solved big aircraft fuel system suction fuel feeding test.
See also Fig. 2, provide the implementation process that the present invention aspirates fuel feeding simulation box duty control method below, its idiographic flow is following:
Step 1: regulate the simulation box internal gas pressure
Make engine low-lift pump inlet pressure or flow satisfy the simulation requirement;
Step 2: fuel oil gets into simulation box from oil feed line, and oil level rises;
Step 3: when the simulation box oil level rises to peak, send the current corresponding signal to computer control system, start electric centrifugal pump 4, the fuel oil in the simulation box is discharged by electric centrifugal pump 4 by computer control system by magnetostriction type liquid level sensor 3;
Step 4: because electric centrifugal pump 4 pump oil masses are greater than the oil inlet quantity of oil feed line; Therefore oil level constantly descends; When oil level drops to minimum point; Send the current corresponding signal by magnetostriction type liquid level sensor 3 to computer control system, close electric centrifugal pump 4, stop to drain the oil by computer control system;
Step 5: however under the continuous oil-feed of oil feed line, oil level constantly rises in the simulation box; During to peak, drained the oil by computer control electric centrifugal pump 4, so circulation repeatedly again; Can in entire test, keep big flow suction fuel feeding duty.
The present invention promptly can be applicable to aircraft fuel system suction fuel feeding test simulation, also can be applicable to aerial fuel dump test simulation, and on certain series aircraft, is well used, and has produced positive technique effect.
Claims (5)
1. one kind is aspirated fuel feeding simulation box operation status control system; It is characterized in that: comprise air inlet electro-hydraulic servo variable valve (1), the electro-hydraulic servo variable valve (2) of bleeding, magnetostriction type liquid level sensor (3), electric centrifugal pump (4), every engine suction fuel feeding simulation pipeline, computer control system and corresponding connecting line; Wherein, The air inlet electro-hydraulic servo variable valve (1) and the electro-hydraulic servo variable valve (2) of bleeding are installed in the simulation box top; The directly logical atmosphere of air inlet electro-hydraulic servo variable valve (1), the electro-hydraulic servo variable valve (2) of bleeding links to each other with pumped vacuum systems; Said magnetostriction type liquid level sensor (3) is vertically mounted on the simulation box top, and its measuring staff length equals the height of simulation box at least, and measuring staff is provided with the ball float that variation along with liquid level fluctuates and can produce corresponding current signal; Said electric centrifugal pump (4) is arranged on the simulation box bottom, and its inlet port is positioned at simulation box, and the oil pump outlet is communicated with return line, and the pump oil mass is greater than the oil feed line oil inlet quantity; Said computer control system and air inlet electro-hydraulic servo variable valve (1), bleed electro-hydraulic servo variable valve (2) and engine suction fuel feeding simulation pipeline link to each other the formation closed-loop control; In addition, computer control system links to each other with magnetostriction type liquid level sensor (3) and electric centrifugal pump (4), constitutes closed-loop control.
2. suction fuel feeding simulation box operation status control system according to claim 1; It is characterized in that: said every engine suction fuel feeding simulation pipeline is formed by ball valve (5), flowmeter (6), oil pressure sensor (7) and oil feed line; Ball valve (5) one ends link to each other with simulation box; One end links to each other with flowmeter (6) outlet; Flowmeter (6) import links to each other with the engine low-lift pump inlet end of oil feed line, and oil pressure sensor (7) is installed in engine low-lift pump porch, and flowmeter all links to each other with computer control system with oil pressure sensor.
3. suction fuel feeding simulation box operation status control system according to claim 2; It is characterized in that: fuel level is provided with two reference mark in the simulation box: the oil level highs and lows; Wherein, the above gas-phase space volume of oil level peak is at least 3% of simulation box total measurement (volume); The pasta of oil level minimum point is higher than electric centrifugal pump inlet port 50mm at least.
4. suction fuel feeding simulation box operation status control system according to claim 3; It is characterized in that: when many engine suction fuel feeding states of needs simulation and its state consistency; Every engine suction fuel feeding simulation pipeline is merged at the end of ball valve (5) near simulation box, thereby only need a simulation box just can simulate many engine suction fuel feeding states.
5. a suction fuel feeding simulation box duty control method is characterized in that, comprises the steps:
Step 1: regulate the simulation box internal gas pressure
Make engine low-lift pump inlet pressure or flow satisfy the simulation requirement;
Step 2: fuel oil gets into simulation box from oil feed line, and oil level rises;
Step 3: when the simulation box oil level rises to peak; Send the current corresponding signal by magnetostriction type liquid level sensor (3) to computer control system; Start electric centrifugal pump (4) by computer control system, the fuel oil in the simulation box is discharged by electric centrifugal pump (4);
Step 4: because electric centrifugal pump (4) pump oil mass is greater than the oil inlet quantity of oil feed line; Therefore oil level constantly descends; When oil level drops to minimum point; Send the current corresponding signal by magnetostriction type liquid level sensor (3) to computer control system, close electric centrifugal pump (4), stop to drain the oil by computer control system;
Step 5: however under the continuous oil-feed of oil feed line, oil level constantly rises in the simulation box; During to peak, drained the oil by computer control electric centrifugal pump (4), so circulation repeatedly again; Thereby in whole experiment, keep big flow suction fuel feeding duty.
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| CN201210188648.7A CN102707739B (en) | 2012-06-08 | 2012-06-08 | Working state control system and control method for pumping oil supply simulation chamber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102926882A (en) * | 2012-10-24 | 2013-02-13 | 哈尔滨东安发动机（集团）有限公司 | Engine ground test start oil supply control system |
| CN105003341A (en) * | 2015-06-23 | 2015-10-28 | 中国航空工业集团公司西安飞机设计研究所 | Regulation and control system and control method for oil supply amount of engine |
| CN107076297A (en) * | 2014-11-06 | 2017-08-18 | 奥迪股份公司 | Method and corresponding fluid guiding equipment for running fluid guiding equipment |
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| CN2258608Y (en) * | 1995-09-28 | 1997-07-30 | 北京航空航天大学 | Measuring instrument for airplane fuel quantity |
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| CN202033073U (en) * | 2011-03-23 | 2011-11-09 | 景博 | Semi-physical simulation platform for digital fuel oil measuring system |
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| CN2258608Y (en) * | 1995-09-28 | 1997-07-30 | 北京航空航天大学 | Measuring instrument for airplane fuel quantity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926882A (en) * | 2012-10-24 | 2013-02-13 | 哈尔滨东安发动机（集团）有限公司 | Engine ground test start oil supply control system |
| CN107076297A (en) * | 2014-11-06 | 2017-08-18 | 奥迪股份公司 | Method and corresponding fluid guiding equipment for running fluid guiding equipment |
| CN107076297B (en) * | 2014-11-06 | 2019-06-14 | 奥迪股份公司 | For running the method and corresponding fluid guidance equipment of fluid guidance equipment |
| CN105003341A (en) * | 2015-06-23 | 2015-10-28 | 中国航空工业集团公司西安飞机设计研究所 | Regulation and control system and control method for oil supply amount of engine |
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