A kind of aircraft fuel systemTechnical field
The present invention relates to airplane design manufacturing technology, particularly a kind of aircraft fuel system.
Background technology
Aircraft fuel oil system inherits fuel oil system major design, and whole fuel oil is all stored in 27 rubber flexible bags.These fuel tanks are divided into 10 groups, and each engine installation has 5 groups.The fuel tank often organized all is connected with each other, and forms a total connection fuel tank group.Often organize in fuel tank and all have to consume a fuel tank.
Certain fuel system pressure refuels, engine oil, and fuel dump function introduction:
Certain aircraft fuel system has followed its series aircraft fuel oil system, mainly through check valve, priming valve (comprise and add oil break switch and fixed flow-limiting orifice plate), fule shut-off valve, fuel and electric motor switch, oil feed line, pressure filling pipeline etc., ensure that fuel oil flows in specific pipeline, realize engine oil, pressure filling and fuel dump function.
Ground pressure-refueling system is used for carrying out pressure filling to nosing fuel tank, aft body fuel tank, port wing fuel tank, starboard wing fuel tank.Because mode is that priming valve opens and closes, accurately measure continuously although achieved, the flow in pipeline, pressure are all unadjustable.Therefore, refueling time is long, and each oil mass is selected to refuel all needs about about 20 minutes, is unfavorable for that aircraft support is safeguarded, when especially repacking refueled aircraft into, air refuelling process will be unusual acid test to aviator; Engine fuel system by left and right two independently fuel delivery system form, respectively to left and right driving engine, auxiliary power unit fuel feeding.The connecting line of left and right fuel delivery system is also equipped with coupling cock, by two independently fuel delivery system connections, fuel oil can be supplied with arbitrary fuel delivery system to every platform driving engine or auxiliary power unit, thus the object of intersection fuel feeding can be realized.Due to engine consumption difference, it is different that the left and right group of fuel tank that fuel tank installation site is caused carries oil, for ensureing that aircraft weight balances in certain limit, is difficult to the fuel oil simultaneously exhausted in each group of fuel tank.
At present, computer measurement control system is a large amount of to be adopted in aircraft fuel system design, and certain aircraft domestic is as the great remodeling in its series, and its fuel oil system Survey control achieves Computer management and control.Due to, design funds, timing node and other reason, fuel oil system total performance improvement is little.The present invention is intended to propose a kind of brand-new mentality of designing, based on the basis adopting computer measurement to control, improves aircraft fuel system function, under adapting to modern war condition, meets the requirement of aircraft fuel system.
Summary of the invention
The object of the invention is the deficiency for above-mentioned fuel oil system designing technique and propose the design of a kind of new fuel oil system, design can meet aircraft utilization requirement, improve by existing control device simultaneously and add speed oil, balanced engine fuel feeding, effectively improve fuel oil system efficiency.
A kind of aircraft fuel system, comprises fuel tank, oil feed line for engines, pressure filling pipeline, fuel tank delivery conduit, supplies oil transportation house steward, fuel tank is many groups, is arranged on leading portion and the back segment of wing and fuselage respectively, comprises wing nearside tank group, wing offside tank group, nosing fuel tank group, aft body fuel tank group, left Center Wing Tank, right median wing fuel tank, each fuel tank is connected with confession oil transportation house steward with pressure filling pipeline by two parallel fuel tank delivery conduits, fuel oil enters for after oil transportation house steward, through pressure filling pipeline flow dividing to each fuel tank, fuel tank is full of, need for driving engine fuel oil is provided time, fuel oil in each fuel tank enters for oil transportation house steward by fuel tank delivery conduit after fuel charger pressurization, by entering driving engine and auxiliary power unit for the oil feed line for engines fule shut-off valve of oil transportation house steward central authorities, pressure filling pipeline is provided with adjustable throttling and pressure sensor, when to aircraft pressure filling, regulate wing nearside tank group simultaneously, wing offside tank group or nosing fuel tank group, aft body fuel tank group fuel flow, ensure center of gravity of airplane invariant position, and can refuel to one or more groups fuel tank individually or simultaneously, fuel tank delivery conduit is provided with adjustable throttling and pressure sensor, when to aero-engine fuel feeding, regulate wing nearside tank group simultaneously, wing offside tank group or nosing fuel tank group, aft body fuel tank group fuel flow, ensure center of gravity of airplane invariant position.
The present invention is a kind of new fuel oil system design produced in conjunction with computer measurement Volume control, mainly by computing machine, the real-time measurement of each group of fuel tank fuel quantity and line pressure are contrasted, the whole process of pressure filling and engine oil is regulated and controled, thus shorten refueling time under realizing various pressure filling condition, ensure the change of the engine oil process center of gravity of airplane, reduce unavailable amount of fuel.Major advantage is as follows:
1, pressure refuelling system adopts adjustable throttling to replace former certain priming valve adopted and set current limiting plate, flow regulating valve opening degree can be regulated according to left and right with group fuel tank entrance pressure in refueling process, ensure wing nearside tank group 4, wing offside tank group 3 or nosing fuel tank group 1, that aft body fuel tank group 2 adds speed oil is equal, both ensured center of gravity of airplane change within a location, aircraft refuelling process weight balances.
2, the priming valve adopting adjustable throttling and pressure sensor to replace certain type machine former to adopt and set current limiting plate, according to the volume read-out of each fuel tank actual needs, in conjunction with fuel oil Measurement &control computer to the adjustment of oiling whole process supervision, accomplish to refuel to one group or several groups and the whole fuel tank of aircraft simultaneously, ensure these fuel tanks full oil simultaneously, shorten refueling time.This is best, the fastest oiling method.Also before, system cannot realize.
3, the priming valve adopting adjustable throttling and pressure sensor to replace certain type machine former to adopt and set current limiting plate, coupled computer management controls, and can organize fuel tank situation of refueling and control in real time, ensure weight balancing to each; And need not stop when there is weight overbalance refueling, adopt manual mode to supplement oil mass, ensure weight balancing.
4, engine fuel system design no longer adopt certain type machine left and right two independently fuel delivery system composition, respectively to left and right driving engine, auxiliary power unit fuel feeding, cancel coupling cock.Using left and right group of fuel tank as a fuel tank simultaneously to two engine oils.According to pressure sensor display pressure by regulating left and right by path adjustable throttling and fuel charger horsepower output, thus changing the flow of fuel tank output, ensureing that left and right fuel tank consumes equivalent fuel oil simultaneously, can ensure that aircraft weight balances without the need to manually participating in.
5, by oil tank fuel delivery conduit pressure sensor force value and fuel tank fuel quantity value, about changing, group oil tank fuel pump horsepower and adjustable throttling opening degree regulate each fuel tank oil-supply speed, thus ensure that nearside tank group, offside tank group, nosing fuel tank group, aft body fuel tank group run out of whole fuel oil simultaneously.Regulate pressure according to calculated value, and through the test of machine upper ground surface and in-flight test checking, should to record in computer systems, which.This function is different and elimination left and right engine consumption difference mainly for front and back fuel tank pool-size.In the past, when sending oily signal to the greatest extent in arbitrary group of fuel tank in individual mailbox group, system proceeds to next group fuel feeding automatically.
5, adopt a main line to be connected with engine fuel system by pressure refuelling system, complete pressure filling and engine oil function.Reduce conduit quantity, simplify design of pipe networks.
6, because oil feed line and pressure filling pipeline are incorporated on a main line, when former fuel dump is as re-used this pipeline, can affect engine oil when fuel dump, therefore, former nosing fuel tank group, aft body fuel tank group fuel dump need from new design.
7, adopt native system method of designing, function pipeline structure single before changing calculates, and adds and is operating as main calculating, by continuous experiment calculation, stores optimum data, performs according to these data programings, improve systemic-function.
Below in conjunction with specific embodiment and accompanying drawing, this application is described in further detail:
Accompanying drawing explanation
Certain type machine fuel oil system schematic diagram under Fig. 1 computer management
Numbering title in figure: 1, nosing fuel tank group 2, aft body fuel tank group 3, port wing fuel tank group 4, starboard wing fuel tank group 5, driving engine 6, right 6# fuel tank (right V group of fuel tank) 7, left 6# fuel tank (left V group of fuel tank) 8, auxiliary power unit 9, fuel charger 10, pressure sensor 11, adjustable throttling 12, fule shut-off valve 13, oil feed line for engines 14, oil tank fuel delivery conduit 15, pressure filling pipeline 16, confession oil transportation house steward
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, a kind of aircraft fuel system, comprises fuel tank, oil feed line for engines 13, pressure filling pipeline 15, fuel tank delivery conduit 14, supplies oil transportation house steward 16, fuel tank is many groups, is arranged on leading portion and the back segment of wing and fuselage respectively, comprises wing nearside tank group 4, wing offside tank group 3, nosing fuel tank group 1, aft body fuel tank group 2, left Center Wing Tank 7, right median wing fuel tank 6, each fuel tank is connected with for oil transportation house steward 16 with pressure filling pipeline 15 by two parallel fuel tank delivery conduits 14, fuel oil enters for after oil transportation house steward 16, each fuel tank is diverted to through pressure filling pipeline 15, fuel tank is full of, need for driving engine fuel oil is provided time, fuel oil in each fuel tank enters for oil transportation house steward 16 by fuel tank delivery conduit 14 after fuel charger 9 pressurizes, by entering driving engine 5, auxiliary power unit 8 for oil feed line for engines 13 fule shut-off valve 12 of oil transportation house steward 16 central authorities, pressure filling pipeline 15 is provided with adjustable throttling 11 and pressure sensor 10, when to aircraft pressure filling, regulate wing nearside tank group 4 simultaneously, wing offside tank group 3 or nosing fuel tank group 1, aft body fuel tank group 2 fuel flow, ensure center of gravity of airplane invariant position, and can refuel to one or more groups fuel tank individually or simultaneously, fuel tank delivery conduit is provided with adjustable throttling 11 and pressure sensor 10, when to aero-engine fuel feeding, regulate wing nearside tank group 4 simultaneously, wing offside tank group 3 or nosing fuel tank group 1, aft body fuel tank group 2 fuel flow, ensure center of gravity of airplane invariant position.
According to the requirement of China's design, aircraft finished product presses the customization of finished product protocol requirement, the current Domestic Aircraft fuel oil system of adjustable throttling there is no the precedent of employing, adjustable throttling and stop valve structure are distinguished not quite, and existing post core shutoff valve or the centre of sphere shutoff valve stepping motor that changes the outfit can be adopted to carry out regulable control and be transformed into adjustable throttling.
The present invention is a kind of design newly that fuel oil system adopts computer management generation, newly-increased element two, pressure sensor and adjustable throttling.According to water conservancy industry experience, adjustable throttling and stop valve structure do not have much difference, and ball core valve or post core can be adopted in conjunction with stepping motor structure.According to the universal law of China's aircraft system design, the way that system element all adopts re-bid to design, these two kinds of elements all have ready-made design finished product in current finished product producer, therefore, there is not the problem that cannot manufacture.Another critical elements of this system is exactly fuel oil computing machine, and this element uses on certain type machine aircraft, just increases function.Be exactly finally that pipeline need rearrange arrangement through general design, from schematic diagram, new figure pipeline trend is close with former figure, and pipeline is more simpler than former figure, and appropriate location should be had to arrange.
The using value of this invention
The present invention mainly controls to improve to the pressure refuelling system in fuel oil system and engine fuel system; Be that the whole operating process of pressure refuelling system and engine fuel system can control timely and effectively, this is also the main development direction of future aircraft fuel oil system.Especially, in the complicated fuel oil system design of large aircraft, self-control and the control ability of fuel oil system can be improved, reduce pilot operator burden.The particularity of following bomber fuel oil system Aircraft Load and flight range requirement, aircraft fuel oil inevitably will adopt the complicated fuel oil system similar with certain type machine aircraft, and this fuel oil system is obviously that the method concentrating on a consumption fuel tank fuel feeding generally adopted now cannot meet.
Improve add speed oil especially modern military aircraft pursue target, due to each fuel tank installation site and fuel flow rate requirement, each fuel tank all can not reach the flow same with oiling house steward, wants to realize each oil mass refueling time the shortest, and it is current best bet that each oiling fuel tank expires oil simultaneously.Realizing each group of fuel tank Dynamic controlling fuel consumption balance is also optimal way.