CN107701344A - A kind of intelligent fuel pump with measure control function - Google Patents
A kind of intelligent fuel pump with measure control function Download PDFInfo
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- CN107701344A CN107701344A CN201710956978.9A CN201710956978A CN107701344A CN 107701344 A CN107701344 A CN 107701344A CN 201710956978 A CN201710956978 A CN 201710956978A CN 107701344 A CN107701344 A CN 107701344A
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- pressure difference
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- fuel
- oil circuit
- metering section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/232—Fuel valves; Draining valves or systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of intelligent fuel pump with measure control function, it includes：Intelligent control unit, servomotor, gear pump, pressure difference scanning and measuring apparatus, differential pressure pickup, oil circuit selects control valve, wherein pressure difference scanning and measuring apparatus is located at the outlet of gear pump, the suitable restriction of circulation area is gated according to range of flow, with higher flow measurement sensitivity while ensureing compared with low voltage difference, pressure difference is scaled real-time traffic by intelligent control unit, according to the rotating speed for the deviation control servomotor for it is expected flow and real-time traffic, so that gear pump pumps out required amount of fuel, oil circuit selection control valve is used for the major-minor oil circuit for gating fuel nozzle, meet the fuel feeding demand of the less flow of engine startup.Fuel feeding on demand can be achieved in the present invention, has the advantages that measuring accuracy is high, the pressure loss is small, compact-sized, easy to use, may be conveniently used the fuel oil control of aero-engine and gas turbine.
Description
Technical field
The invention belongs to aero-engine fuel control system field, relates generally to a kind of fuel metering based on electrodynamic pump
Method.Specifically a kind of electrodynamic pump with intelligent control function, can the accurate fuel oil of real-time output flow on demand, be applicable
In aero-engine, the occasion of the accurate fuel feeding of needs such as combustion chamber fuel feeding of gas turbine.
Background technology
Aero-engine and gas turbine are burnt by fuel oil, are produced heat content and are promoted turbine acting or sprayed from jet pipe high
Fast air-flow obtains thrust.Therefore, for aero-engine and gas turbine, main control device be exactly by adjust into
Enter the amount of fuel of fuel nozzle.The working condition of engine is different, and the amount of fuel needed for it is also different.How efficiently, essence
Really realize amount of fuel adjust, be aero-engine and gas turbine control in it is main the problem of.
Existing aero-engine and gas turbine typically take the regulative mode of oil return after pump, are specially lived using metering
The fuel regulation system that door (FMU), differential pressure valve, oil return valve (FRV) are formed, differential pressure valve ensure the pressure before and after metering valve
Difference maintains a constant value, and the unnecessary amount of fuel of fuel pump output returns to the entrance of pump by oil return valve, real
Border amount of fuel is controlled by the aperture of metering valve.Oil return adjustment mode causes very big power loss after this pump.
In addition, also there is the shortcomings of complicated, weight is big, and cost is high in the fuel system of oil return adjustment.
For this it is a series of the problem of, patent No. CN201310614184.6 proposes a kind of combustion gas wheel based on electrodynamic pump
Machine fuel metering method.The patent proposes area and inlet outlet pressure differential the calculating fuel flow using throttling arrangement, utilizes pressure limiting
Device controls the inlet outlet pressure differential of throttling arrangement, to realize the accurate supply of fuel oil.
But this mode orifice size that the patent proposes is certain, when fuel flow is smaller, there is that pressure difference is too small to be not easy
The problem of measurement, when fuel flow is larger, the problem of crushing is excessive be present.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention proposes a kind of with measure control function
Intelligent fuel pump, using pressure difference scanning and measuring apparatus obtain fuel flow caused by pressure difference, when needing multichannel measurement, using point
When the method that scans obtain pressure difference caused by fuel flow, flow is scaled using intelligent control unit, and then motor is carried out
Control, can accurately realize fuel feeding on demand, and it is excellent to have that measuring accuracy is high, the pressure loss is small, compact-sized, easy to use etc.
Point.
Technical scheme：A kind of intelligent fuel pump with measure control function, including intelligent control unit, servomotor, tooth
Wheel pump, the metering section group with throttle orifice, differential pressure pickup, pressure difference scanning survey switching valve group and oil circuit selection control valve group, institute
Stating pressure difference scanning survey switching valve group includes N number of pressure difference scanning survey switching valve, and the oil circuit selection control valve group includes N number of oil
Road selects control valve, and the metering section group with throttle orifice includes N number of metering section with throttle orifice, and N is the natural number more than 1,
The gear pump, the metering section group with throttle orifice and oil circuit selection control valve group are sequentially connected, and it is defeated that the gear pump pumps out fuel oil
The metering section group with throttle orifice is given, the fuel oil after the metering section group with throttle orifice selects control valve group, stream by oil circuit
Enter the major-minor fuel nozzle of engine；The servomotor is connected with gear pump, for driving the gear pump；The pressure difference passes
Sensor is flowed through in the metering section group with throttle orifice by the metering with throttle orifice of oil circuit selection control valve gating for measuring fuel oil
Duan Qianhou pressure differential, and pressure differential is fed back into intelligent control unit；Described in the pressure difference scanning survey switching valve group connection
Differential pressure pickup and the metering section group with throttle orifice, are controlled by intelligent control unit, connection differential pressure pickup and the band being strobed
The metering section of throttle orifice；The oil circuit selection control valve group controls oil circuit to select opening for control valve by intelligent cell control unit
It is logical, according to traffic demand signal behavior oil circuit, fuel oil is flowed into the major-minor fuel nozzle of engine；The intelligent control unit is used
In the pressure difference signal for traffic demand signal and the differential pressure pickup feedback for receiving input, through being calculated motor control signal and
Oil circuit selection signal, the conducting of the oil circuit selection control valve of servomotor rotating speed and corresponding flow is controlled respectively；And according to current
The oil circuit of selection, pressure difference scanning switching valve corresponding to control pressure difference scanning switching valve group gating.
Further, the flow rate calculation module in the intelligent control unit receives the pressure difference letter of differential pressure pickup input
Number, and the fluid passage selection signal fed back according to pressure difference scanning handover module, the pressure difference stream based on the corresponding metering section demarcated in advance
Magnitude relation, by flow rate calculation program, and according to the gated information of pressure difference scanning survey switching valve, current differential pressure is scaled and worked as
Preceding flow Q, with the traffic demand Qr of outside input relatively after, obtain flow deviation Δ Q；Δ Q is calculated by flow-control module
To motor speed demand nr, it is nr to control the actual speed of servomotor by motor control module.
Further, multiple metering section can gate in the metering section group with throttle orifice, intelligent control unit timesharing choosing
The corresponding valve with selected logical metering section in logical pressure difference scanning survey switching valve group, i.e., gating different single pressure differences at different moments
Scanning survey valve, to measure pressure difference all the way, scanning survey is each in this period to obtain per pressure difference all the way in a short time
Road flow pressure-difference information, the flow information of each oil circuit is measured, while total flow is equal to the aisled flow of institute being strobed
With.
Further, multiple oil circuit selection control valves can be turned in the oil circuit selection control valve group to gate fuel nozzle
Multiple oil circuits, multiple oil circuits can be major-minor oil circuit, meet the less fuel flow of engine startup fuel feeding demand and
The fuel feeding demand of larger fuel flow during normal work, make the fuel oil regulation of engine more convenient.
Further, the intelligent control unit includes flow rate calculation module, in the metering section group with throttle orifice not
Pressure difference and discharge relation with metering section are demarcated in advance, form the fit correlation of pressure difference and flow
Beneficial effect：Intelligent fuel pump of the present invention with measure control function, may be directly applied to aeroplane engine
Machine and gas turbine fuel system, also available for the occasion for needing accurate fuel feeding that other are given by flow, using intelligent control
Unit, the metering section with throttle orifice of pressure difference needed for gating satisfaction, it is ensured that low voltage difference, accurately measure.There is multichannel
When metering section is strobed, corresponding pressure difference scanning survey is cut in intelligent control unit timesharing gating pressure difference scanning survey switching valve group
Valve is changed, ensures effective measurement of pressure difference, fuel feeding on demand can be achieved in the present invention, has measuring accuracy height, the pressure loss is small, structure is tight
The advantages that gathering, be easy to use, for system in aero-engine and gas turbine fuel system, can be made to take into account reliability, again
Amount, cost and complexity, significantly improve the overall performance of fuel system or even aero-engine and gas turbine.
Brief description of the drawings
Fig. 1 is the flow chart of the intelligent fuel pump of the invention with measure control function,
Fig. 2 is the circuit flow chart of the intelligent control unit of the intelligent fuel pump of the invention with measure control function；
Fig. 3 is the control principle block diagram of the intelligent fuel pump of the invention with measure control function；
Fig. 4 is that the pressure difference scanning survey of the intelligent fuel pump of the invention with measure control function switches the schematic diagram of valve group；
Fig. 5 is the measuring section group flow area with throttle orifice and pressure of the intelligent fuel pump of the invention with measure control function
Graph of a relation drops.
Wherein, 1 is intelligent control unit, and 2 be servomotor, and 3 be gear, and 4 be the metering section group with throttle orifice, and 5 be pressure
Gap sensor, 6 be that pressure difference scanning survey switches valve group, and 7 be that oil circuit selects control valve.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the present invention.
It is as shown in Figure 1 the intelligent fuel pump with measure control function, including：Intelligent control unit 1, servomotor 2, tooth
Wheel pump 3, the metering section group 4 with throttle orifice, differential pressure pickup 5, pressure difference scanning survey switching valve group 6 and oil circuit selection control valve group
7.In Fig. 1, thin arrow represents non-hydraulic signal path, the block arrows such as electric or moment of torsion, rotating speed and represents hydraulic pressure or fluid passage.Band
The metering section group 4 of throttle orifice, equipped with differential pressure pickup 5, differential pressure pickup and metering section switch valve group 6 by pressure difference scanning survey
Connection, pressure difference scanning survey switching valve group are controlled by intelligent control unit, and can making differential pressure pickup, metering section connects all the way with certain
It is logical, to measure the pressure difference of the road metering section；Do not go the same way metering section throttle hole area it is different, therefore can be different with large-range measuring
Pressure difference under flow, and the pressure loss is relatively low.When can meet different flow respectively, in the case of ensureing low voltage difference, pressure difference passes
The measurement accuracy of sensor；Differential pressure pickup measuring section runner both ends pressure difference simultaneously feeds back to intelligent control unit, to control
The gating of motor speed and pressure difference scanning survey switching valve group.Oil circuit selects control valve 7, is selected by the oil circuit of intelligent control unit
Control module controls, can be gated by traffic demand in the metering section group 4 with throttle orifice some or certain several make pressure difference suitable
Metering section, the measurement of voltage supply gap sensor, so-called suitable pressure difference refers to both will not be because having caused crushing is excessive to exceed during big flow
The range of differential pressure pickup, pressure difference is too small when again will not be because of low discharge causes differential pressure pickup measurement inaccurate；Pressure difference scanning survey
Switch valve group pressure difference scanning survey control module control in by intelligent control unit, the corresponding meter for being currently needed for measuring pressure difference of gating
The pressure difference scanning survey switching valve of section is measured, so as to realize the measurement to this road binders road pressure difference.When traffic demand is larger, it is necessary to multichannel
Gated to pressure difference scanning handover module timesharing when path gates, in intelligent control unit corresponding in pressure difference scanning survey switching valve group
The pressure difference scanning survey switching valve of multiple metering section, realize the Time share scanning measurement of pressure difference；Oil circuit selection control valve 7 can also be selected
The major-minor oil circuit of logical fuel nozzle, meets larger when the fuel feeding demand and normal work of the less fuel flow of engine startup
The fuel feeding demand of fuel flow, make the fuel oil regulation of engine more convenient.
Servomotor 2 shown in Fig. 1, from permanent magnet synchronous servo motor, motor driver receives the PWM arteries and veins of controller
Rotation speed servo control is realized in punching.Drive pump to rotate, hydraulic power, the selected rating of machine parameter such as institute of table 1 are provided for system
Show.
| Power | 400W |
| Rated voltage | 200V |
| Control mode | Position analog rate control |
| Rated speed | 3000RPM |
Table 1
Gear pump 3 shown in Fig. 1, by motor driven, from high precision gear wheel pump, imitated by known displacement and volume
Rate, calculated using intelligent control unit, intelligent control unit output pwm control signal, controlled motor drives gear pump, accurately
The fuel oil of certain flow is exported on demand, and its amount of fuel pumped out mainly meets relation by the rotating speed control of servomotor：
Q=f (nr, q, η) (a)
In formula (a), nr is the rotating speed of motor output, and q is gear pumpage, and η is gear pump volumetric efficiency.The rotating speed of motor
Controlled by intelligent control unit, the fuel oil that gear pump pumps out is conveyed to pressure difference scanning survey mechanism, is measured.
The specifications parameter of the gear pump of use is as shown in table 2；
Table 2
The circuit flow chart of the intelligent control unit of the intelligent fuel pump with measure control function is illustrated in figure 2, successively
Including：
Power supply circuit (DC-DC), filter circuit, signaling conversion circuit (I/V conversion), Amplification and insulation circuit (voltage with
With), intelligent control chip, serial communication interface, Ethernet interface, PWM output interfaces, IO output interfaces.
Wherein, power supply circuit selects DCDC chips Ws RB2405S, it is possible to achieve 24V control sources, 5V voltage outputs, with full
Sufficient signal conversion, isolation amplification, the power demands of intelligent control chip；Filter circuit is by the way of LPF, to filter off
Voltage signal it is unstable；Signaling conversion circuit realizes that I/V is changed using precision resistance and TLV2221 operational amplifiers；Isolation
Amplifying circuit realizes voltage follow using TLV2221；Intelligent control chip selects TM4C1294NCPDT, can be conveniently by
Programming, realizes various control functions；And TM4C1294NCPDT carries serial communication, Ethernet and PWM outputs and IO output works
Can, by the configuration of peripheral circuits, it can easily meet use demand.After upper electricity, outside given flow signal, stream are received
Measuring the input mode of signal can be inputted with the one form of which of electric current, voltage or digital quantity, respectively from signaling conversion circuit,
Filter circuit or serial line interface, or from host computer by Ethernet input intelligent control chip, voltage signal is directly given or adopted
After collection, amplification chip is inputed to after filtering, then is inputted into control chip, for example 0V is corresponded to and corresponded to max-flow without flow, 2V
Amount, has linear relationship with flow；Electric current is 4~20mA, 0~2V voltages can be converted to by I/V, therefore be also with voltage
Correspond, electric current is not readily susceptible to disturb in transmitting procedure, and is adapted to long-distance transmissions and unattenuated, Ethernet and serial
Data signal, it is to replace a flow, such as 00000000 representative to represent max-flow without flow, 11111111 with binary coding
Amount, is then corresponded；The pressure signal of differential pressure pickup feedback can be in the form of curtage respectively from signal simultaneously
Change-over circuit or filter circuit input intelligent control chip；Pressure difference signal and flow signal can be in intelligent control chips by not
With port input, be distinguish between, such as it is flow to define A0 mouths input voltage, A1 mouths input voltage is pressure difference, and chip can be with
Identification；I/O signals can be controlled to scanning survey switching valve, oil circuit selection control valve.
Intelligent control chip passes through built-in program module, realizes flow rate conversion, flow control, PWM outputs, oil circuit respectively
The function such as selection control, pressure difference scanning survey control；Wherein flow rate conversion and flow control is completed in chip internal, and is exported
Pwm signal, as the control signal of motor, by PWM output modules, conversion can direct controlled motor pwm signal, export
To motor；Oil circuit selection control is according to the change of the range of needs of present flow rate, the shut-off of control oil circuit selection control valve, selection
One or more suitable oil circuit, makes fuel oil flow through suitable metering section, to ensure suitable pressure difference；Pressure difference scanning survey controls
According to the oil circuit and the pressure difference of feedback currently selected, a certain valve of gating pressure difference scanning survey switching valve group, realize to corresponding
The measurement of metering section pressure difference all the way, when needing to measure multichannel pressure difference, it is corresponding to gate multichannel to the control timesharing of pressure difference scanning survey
Pressure difference scanning survey switching valve, with realize the Time share scanning of pressure difference measure.Time share scanning refers to different in gating at different moments
Single pressure difference scanning survey valve, to measure pressure difference all the way, scanning survey is per pressure difference all the way in a short time, during obtaining this section
Interior every flow pressure-difference information all the way, to obtain the differential pressure flow that each oil circuit is measured per flow pressure-difference information all the way
Information.
The control principle block diagram of the intelligent fuel pump with measure control function is illustrated in figure 3, its control structure is as follows：
Intelligent control unit be divided into flow-control module, motor control module, flow rate calculation module, oil circuit selecting module,
Pressure difference scans five modules of handover module.
Wherein motor control forms motor speed closed loop with motor, and its control instruction is given by flow-control module.
Flow control, motor speed closed loop, pump and metering section collectively form flow control closed loop forward path, sensor and
Flow rate calculation forms flow control closed feedback loop, and the control instruction of flow control closed loop is referred to by required external flow
Order is given；
Oil circuit selecting module is instructed by traffic demand and controlled, and oil circuit corresponding to selection selects control valve, suitable to gate
Oil circuit, fuel oil is set to flow through corresponding metering section；
Pressure difference scans the selected oil circuit information that handover module is provided by sensor signal and oil circuit selection and controlled, timesharing
Pressure difference scanning switching valve corresponding to ground gating, so that the pressure difference of the corresponding metering section of sensor measurement.
The control principle block diagram control flow of the intelligent fuel pump of measure control function shown in Fig. 3 is as follows：
The major function of flow rate calculation module is to receive the pressure difference letter of differential pressure pickup feedback wherein in intelligent control unit
The selected oil circuit information that number Δ P and oil circuit selection control module provide, according in advance to the metering section group with throttle orifice
The pressure difference and the fit correlation of flow that the demarcation that middle different metering section pressure differences and discharge relation are carried out is formed, are scaled pair
The accurate current flow signal Q answered, and it is transferred to the flow-control module of inside.
Flow-control module obtains flow by comparing the traffic demand signal Qr and current flow signal Q of outside input
Deviation of signal Δ Q.By incremental timestamp algorithm, the input signal n of motor speed closed loop is converted tor, it is transferred to motor control
Molding block.
Motor control module is by by FAST methods or FOC methods, FAST methods gather rotor flux, flux angle, thorn
The status information such as pain speed and axle moment of torsion, obtains current rotating speed；FOC methods are to be worked as using Field orientable control from what motor obtained
Preceding tach signal n, by with speed demand signal nrCompare, obtain rotating speed deviation delta n.By incremental timestamp algorithm,
Rotating speed deviation delta n is converted into controlled motor tachometer value, recycles position analog rate control planning, is converted to required PWM letters
Number, controlled motor rotating speed, the flow of demand is pumped out by motor driven pump；
Position analog rate control, i.e., worked by pwm signal control servomotor in the form of stepping, each standard arteries and veins
Rush stepping once, therefore PWM signal frequency meets relation with actual rotating speed per minute：
In formula (b), N represents that motor speed rpm per minute, f represent the frequency of pwm signal, and k expressions pre-set each
Turn required number of steps.
Oil circuit selecting module receives the traffic demand control signal of input, selects under present flow rate, ensures suitable pressure
The required oil circuit of difference, and control the conducting that oil circuit is corresponded in oil circuit selection control valve group so that pressure difference is in suitable model all the time
Enclose, its excessive range beyond differential pressure pickup will not be both caused because of big flow, it will not be caused too small to cause because of low discharge again
Differential pressure pickup measurement is inaccurate.
Pressure difference scanning handover module receives the pressure difference signal of differential pressure pickup measurement, and according to current oil circuit selecting module institute
The oil circuit of selection, intelligently pressure difference scanning switching valve corresponding to timesharing conducting, makes differential pressure pickup Time share scanning difference oil circuit meter
Measure the pressure difference of section；The handover module of pressure difference scanning simultaneously now will pass to flowmeter by corresponding pressure difference scanning switching valve gated information
Unit is calculated, to ensure that flow rate calculation unit calculates flow exactly by pressure difference.
Fig. 4 show the schematic diagram of the pressure difference scanning survey switching valve group of the intelligent fuel pump with measure control function, adopts
By the use of the reversal valve of Electromagnetic Control as pressure difference scanning survey valve, pressure difference scanning handover module control in by intelligent control unit,
Can only have all the way that oil circuit gating, this oil circuit are connected to differential pressure pickup a unified moment, the differential pressure pickup other end is connected to public
End, makes differential pressure pickup synchronization to measure the pressure difference of metering section all the way.
In this example, exemplified by the present invention is used for into certain type gas turbine fuel system, pressure difference scanning survey is specifically introduced
Device.
Certain type gas turbine fuel system, start-up course fuel feeding 100kg/h；Unloaded maximum (top) speed fuel feeding 300kg/h；It is maximum
Load fuel feeding 600kg/h；The pressure difference of the metering section with throttle orifice is set to be arrived respectively in 100kg/h to 200kg/h processes A, 300kg/h
600kg/h process B, pressure difference are below 50Kpa, so both will not be because having caused crushing excessive during big flow beyond pressure more than 10Kpa
The range of gap sensor, pressure difference is too small when again will not be because of low discharge causes differential pressure pickup measurement inaccurate.
In this example, the metering section group with throttle orifice with two-way oil circuit can be selected, i.e.,：1.100kg/h arrive
200kg/h processes A uses oil circuit A；2.300kg/h to 600kg/h processes B uses oil circuit B.Two processes use two different oil circuits
Pressure difference is set to be more than 10Kpa less than 50Kpa respectively.
Through calculating, throttling hole length be unified for 2mm in the case of, process A, should select metering section throttle diameter d for
1.25mm, area 1.23mm2；During process B, metering section throttle diameter d should be selected as 2mm, area 3.14mm2.Pressure difference-flow closes
System is as shown in table 3, and as can be seen from the table, being satisfied by pressure difference during A, B two respectively will more than 10Kpa less than 50Kpa
Ask.
Fig. 5 is delineated in table 3, flow area, the relation between flow and pressure drop, and control can be intuitive to see from figure
The different flow areas of adjustable differential pressure metrological service processed, when can meet different flow demand respectively, ensure pressure difference suitable
In the range of.
Table 3
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of intelligent fuel pump with measure control function, it is characterised in that including intelligent control unit (1), servomotor
(2), gear pump (3), the metering section group (4) with throttle orifice, differential pressure pickup (5), pressure difference scanning survey switching valve group (6) and oil
Road selection control valve group (7), the pressure difference scanning survey switching valve group (6) include N number of pressure difference scanning survey switching valve, the oil
Road selection control valve group includes N number of oil circuit selection control valve, and the metering section group (4) with throttle orifice includes N number of band throttle orifice
Metering section, N is natural number more than 1, and the gear pump (3), the metering section group (4) with throttle orifice and oil circuit select control valve
Group (7) is sequentially connected, and the gear pump (3) pumps out fuel oil and is conveyed to the metering section group (4) with throttle orifice, by with throttle orifice
Fuel oil after metering section group selects control valve group (7) by oil circuit, flows into the major-minor fuel nozzle of engine；The servomotor
(2) it is connected with gear pump, for driving the gear pump (3)；The differential pressure pickup (5) flows through band throttling for measuring fuel oil
The pressure differential before and after the metering section with throttle orifice of control valve (7) gating is selected in the metering section group (4) in hole by oil circuit, and will pressure
Power difference feeds back to intelligent control unit；The pressure difference scanning survey switching valve group (6) connects the differential pressure pickup (5) and belt segment
The metering section group (4) of discharge orifice, is controlled by intelligent control unit, connection differential pressure pickup (5) and the meter with throttle orifice being strobed
Measure section；The oil circuit selection control valve group (7) controls oil circuit to select the open-minded of control valve by intelligent control unit, according to flow
Desired signal selects oil circuit, fuel oil is flowed into the major-minor fuel nozzle of engine；The intelligent control unit (1) is defeated for receiving
The traffic demand signal entered and the pressure difference signal of differential pressure pickup feedback, selected by motor control signal and oil circuit is calculated
Signal, the conducting of the oil circuit selection control valve of servomotor (2) rotating speed and corresponding flow is controlled respectively；And according to currently selecting
Oil circuit, pressure difference scanning switching valve corresponding to control pressure difference scanning switching valve group gating.
A kind of 2. intelligent fuel pump with measure control function according to claim 1, it is characterised in that the intelligence control
Flow rate calculation module in unit (1) processed receives the pressure difference signal of differential pressure pickup input, and scans handover module according to pressure difference
The fluid passage selection signal of feedback, based on the differential pressure flow relation for the corresponding metering section demarcated in advance, by flow rate calculation program, and
According to the gated information of pressure difference scanning survey switching valve, current differential pressure is scaled present flow rate Q, needed with the flow of outside input
After seeking Qr relatively, flow deviation Δ Q is obtained；Motor speed demand nr is calculated by flow-control module in Δ Q, by motor control
It is nr that module, which controls the actual speed of servomotor (2),.
A kind of 3. intelligent fuel pump with measure control function according to claim 2, it is characterised in that the band throttling
Multiple metering section can gate in the metering section group (4) in hole, intelligent control unit (1) timesharing gating pressure difference scanning survey switching valve group
(6) correspond to the valve with selected logical metering section in, i.e., gating different single pressure difference scanning survey valves at different moments, with measurement
Pressure difference all the way, scanning survey is per pressure difference all the way in a short time, to obtain per flow pressure-difference information all the way, each oil of measurement
The flow information on road, while total flow is equal to each road flow sum.
A kind of 4. intelligent fuel pump with measure control function according to claim 1, it is characterised in that the oil circuit choosing
Multiple oil circuits selection control valves can be turned on to gate multiple oil circuits of fuel nozzle by selecting in control valve group (7), multiple oil circuits can be with
It is major-minor oil circuit, larger fuel flow during meeting the fuel feeding demand of the less fuel flow of engine startup and normal work
Fuel feeding demand.
A kind of 5. intelligent fuel pump with measure control function according to claim 2, it is characterised in that the intelligence control
Unit (1) processed includes flow rate calculation module, and the pressure difference and flow to different metering sections in the metering section group (4) with throttle orifice close
System is demarcated in advance, forms the fit correlation of pressure difference and flow.
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| CN201710956978.9A CN107701344A (en) | 2017-10-16 | 2017-10-16 | A kind of intelligent fuel pump with measure control function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426710A (en) * | 2018-05-22 | 2018-08-21 | 广州飞机维修工程有限公司 | Civil aircraft accessory power system Fuel Flow Regulator test device and method |
| CN110486194A (en) * | 2018-05-15 | 2019-11-22 | 现代自动车株式会社 | Canister purge control method for vehicle |
| CN111878272A (en) * | 2020-06-30 | 2020-11-03 | 潍柴动力股份有限公司 | Exhaust device and exhaust method for high-pressure oil pump |
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| CN116146357A (en) * | 2023-02-27 | 2023-05-23 | 贵州航天林泉电机有限公司 | Feedforward control method of electric fuel pump |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110486194A (en) * | 2018-05-15 | 2019-11-22 | 现代自动车株式会社 | Canister purge control method for vehicle |
| KR20190130744A (en) * | 2018-05-15 | 2019-11-25 | 현대자동차주식회사 | Method for canister purge control of vehicle |
| KR102484937B1 (en) | 2018-05-15 | 2023-01-04 | 현대자동차주식회사 | Method for canister purge control of vehicle |
| CN108426710A (en) * | 2018-05-22 | 2018-08-21 | 广州飞机维修工程有限公司 | Civil aircraft accessory power system Fuel Flow Regulator test device and method |
| CN108426710B (en) * | 2018-05-22 | 2024-04-30 | 广州飞机维修工程有限公司 | Testing device and method for fuel flow regulator of auxiliary power system of civil aircraft |
| CN111878272A (en) * | 2020-06-30 | 2020-11-03 | 潍柴动力股份有限公司 | Exhaust device and exhaust method for high-pressure oil pump |
| CN115788692A (en) * | 2022-11-10 | 2023-03-14 | 中国航发北京航科发动机控制系统科技有限公司 | High-precision fuel metering electronic control device and method |
| CN116146357A (en) * | 2023-02-27 | 2023-05-23 | 贵州航天林泉电机有限公司 | Feedforward control method of electric fuel pump |
| CN116146357B (en) * | 2023-02-27 | 2023-09-26 | 贵州航天林泉电机有限公司 | Feedforward control method of electric fuel pump |
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Application publication date: 20180216 |