《飞机机电专业英语》课件-B737NG燃油系统

FuelStorageFuelStorageIntroduction

Theprimarypurposeoffuelsysteminclude:storeandsupplyfuel

Therearemanysubsystemoffuelsystem:Fuelstorage【燃油储存】andpressurefueling【压力加油】Fuelfeed(engine&APU)【供油（发动机及APU）】Defuel【抽油】Fuelquantityindicatingsystem(FQIS)【油量指示系统】Fueltemperatureindication【燃油温度指示】FuelStorageUsingthewetwingconcept,allfuelisstoredinthreetanks,maintank1,maintank2,andcentertank,whichareconstructedoftheprimarywingstructure.使用湿机翼的理念，所有的燃油都储存在三个油箱中，由基本机翼结构所构成的1号、2号主油箱和中央油箱。Frontandrearspars,topandbottomwingskinsandselectedwingribsaresealedinternally【adv.内地；内心地】toformthetanks.Thecentertankisinthefuselageandtheleftandrightwingroot.FuelStorageFuelStorageThemaintanksarelocatedoutboard【adj.外侧的】ofthecentertank.Thesurgetanks【防波（通气）油箱】,designedtocollectfueloverflow,areoutboardofeachmaintank.FuelStorageHowmanytanksofthe737NG?Andhowmanytanksusedtostorefuel?Whataboutothers?

Onecentertank,leftandrightmaintank,twosurgetanksWhichcomponentsconstructthefueltank?

Frontandrearspars,topandbottomwingskins,andselectedwingribsFuelStorageSomepartsinthefueltank:accesspanels,wingribs,cutouts【切口】,checkvalves,andsumpdrainvalves【集油放泄活门】FuelStorageWingfueltankaccesspanels【接近盖板】permitentryintoeachfuelandsurgetank.Thewingfueltankaccesspanelsareonthebottomwingskin.FuelStorageWingribsdividethefueltanksintobays【n.设备舱，机舱】.Wingfueltankaccesspanelsarebetweenthewingribs.Accessacrosswingribstoadjacent【adj.相邻，相邻的】baysisthroughcutouts【n.切口，断流器】.Wingrib8,inmaintank1andmaintank2,hascheckvalves【单向活门】.Thecheckvalvesletfuelflowinboardbutdonotletfuelflowoutboard.FuelStorageThesump【n.污水坑，集油槽】drainvalvesletfuel,water,andcontamination【n.污染】drainfromeachfueltank.Sumpdrainvalvesareatthelowpointofeachtank.FuelVentSystemThefuelventsystemkeepsthepressureofthefueltanksneartheambientpressure.Toolargeapressuredifferencecancausedamagetothewingstructure.Flamearrestors【阻焰器】makesureexcessiveheatdoesnotenterthefuelventsystem.Aclogged【n.&v.堵塞，障碍】flamearrestorcausesthepressurereliefvalve【释压活门】inthesurgetanktoopen.Whenopen,thepressurereliefvalvebecomesanotherventforthefuelventsystem.Stringersandtheupperwingskinmaketheventchannels.FuelVentSystemTheventchannelshavedrainfloatvalves【放泄浮子活门】inthecentertank.Venttubesattachtoventchannels.Eachventtubehasadrainfloatvalve.Afuelventfloatvalveisontheoutboardfueltankendribinmaintank1andmaintank2.Asurgetankdraincheckvalveisontheoutboardfueltankendribinmaintank1andmaintank2.Theventscoop【通气斗】andpressurereliefvalveareonanaccessdoorineachsurgetank.FuelVentSystemFuelVentSystemWhatisthefunctionoffuelventsystem?Keepthepressureofthefueltanksneartheambientpressure.Listthemaincomponentsoffuelventsystem.Andthefunction,locationofeachcomponents.Ventscoop,flamearrestor,pressurereliefvalve,stringer,ventchannel,venttube,drainfloatvalve,floatvalve

PressureFuelingSystemThepressurefuelingsystemletsyourefuelalltanks.Youalsousethesystemduringfueltransferfromtanktotank.Alltanksfillfromthefuelingstationattherightwing.Thefuelingstationhasthesecomponents:Fuelingpanel,Fuelingmanifold,Fuelingreceptacle,andFuelingshutoffvalves.加油工作站由以下部件组成：加油面板，加油总管，加油接头和加油关断活门。PressureFuelingSystemWhereyoucanrefueltanksandtransferfromtanktotank?Thefuelingstationattheleadingedgeofrightwing.Thefuelingstationhasthesecomponents:Fuelingpanel,Fuelingmanifold,Fuelingreceptacle,Fuelingshutoffvalves.PressureFuelingSystemThesolenoid【n.螺线管，线圈】forafuelingshutoffvalveenergizes【v.通电】whenyouputthecontrolswitchtotheOPENposition.Thevalveopensiffuelpressureisavailable.Afloatswitchremovespowertothefuelingshutoffvalvewhenthetankisfull.YoualsoremovepowerwhenyouputthecontrolswitchtotheCLOSEposition.Withoutelectricalpower,thevalvecloses.Thereisalsoamanualoverrideplunger【n.柱塞，撞针杆】oneachfuelingshutoffvalve.Theplungerandfuelpressureletyouopenthevalveifthesolenoidfails.PressureFuelingSystemPressureFuelingSystemWhatarethemaincomponentsoftheP15fuelingpanel?

Fuelingvalveopenlights,Fuelingindicationtestswitch,Fuelingvalvecontrolswitch,Fuelindicators,Fuelingpowercontrolswitch.Whichcomponentsyoucanusedtocontrolthefueling?Fuelingshutoffvalve——controlswitch,floatswitch,overrideplungerEngineFuelFeedTheenginefuelfeedsystemusesthesecomponentstosupplyfueltotheengines:Centertankboostpumps【增压泵】(2),ForwardandAftboostpumps(4),Bypassvalve(2),Crossfeedvalve【交输活门】,Enginefuelsparvalve(2),Waterscavenge【v.清除污物，打扫】ejectorpump(4).EngineFuelFeedLetuslookatthecomponentsusedtosupplyfueltoengines:EngineFuelFeedYoumustknowthefunctionofthefollowingcomponents:SwitchesBypassvalveSparvalveCrossfeedvalveThewaterscavengejetpumps【引射泵】EngineFuelFeedTheswitchesonthefuelsystempanelcontroleachcentertankboostpumpandeachforwardandaftboostpumpformaintank.Theswitchescontrolelectricalpowertothepumps.Abypassvalvesuppliesasecondaryfuelflowpathtotheengines.EngineFuelFeedThebypassvalvesoperateautomatically.Theenginefuelsparvalvescontrolfuelflowtotheengines.Theenginestartleversandtheenginefireswitchescontroltheenginefuelsparvalves.发动机起动手柄和发动机灭火电门控制着发动机燃油翼梁活门。EngineFuelFeedThecrossfeedvalvepermitsasinglefueltanktosupplyfueltobothengines.Thewaterscavengejetpumpsremovewaterfromthelowpointsofeachtanktopreventcorrosion【n.腐蚀，锈蚀】.EngineFuelFeedInthewheelwells,themaintankaftboostpumps,andcentertankboostpumpsarelocatedontherearspar.Themaintankforwardboostpumpsaremountedon【安装在】thefrontspar.Eachofboostpumpsinmaintankisinterchangeable.Themaintankboostpumpsarenotinterchangeablewiththecentertankboostpumps.EngineFuelFeedWithfuelinallthreetanksandallpumpoperating,thecentertankboostpumpsprovidebackpressure,whichmakethemaintankboostpumpcheckvalvesclosed,ensuringthecentertankfuelisusedfirst.在3个油箱都有油且所有的泵都正常运行的前提下，中央油箱增压泵向主油箱增压泵的单向活门提供反向压力并使其关闭，从而确保中央油箱的燃油最先被使用。Afterthecentertankisempty,theboostpumpsprovidefuelfromthemaintanks.EngineFuelFeedIntheeventthatboostpumpsarenotoperating,suctionflowfrommaintanksisavailablethroughabypassvalve.Suctionflowisnotpossiblefromcentertank,asthereisnobypassvalve.Acrossfeedvalveinterconnects【v.相互连接】theleftandrightsidecrossfeedmanifolds.Thisallowsanytankstofeedeitherpowerplant.EngineFuelFeedSomequestionsaboutenginefuelfeedoperation:Wherearetheseboostpumps?Canyouinterchangethemaintankboostpumps?Whataboutmaintankpumpsandcentertankpumps?Ifeverythingisok,whichtankfuelisusedfirst?Andhowtoensure?Whenthebypassvalvebegintowork?Cantheleftmaintankfeedrightengine?APUFuelFeedTheAPUfuelfeedsystemhasthesecomponents:APUfuelfeedline,APUfuelfeedlineshroud,APUfuelshutoffvalve,APUdcboostpump.TheAPUfuelfeedlinestartsintankNo.1,goesthroughthecentertankthenafttotheAPU.APU供油管路起始于1号主油箱，经过中央油箱，然后向后供给APU.APUFuelFeedTheAPUfuelfeedsystemsuppliesfuelfromanytanktotheAPU.ThecentertankboostpumpsortheboostpumpsinmaintankNo.1andmaintankNo.2supplyfueltotheAPU.Iftheboostpumpsareoff,theAPUsuctionsfuelfrommaintankNo.1.TheAPUfuelfeedlineshroudisaroundtheAPUfuelfeedline.TheshroudcollectsfuelleaksfromtheAPUfuelfeedline.Theshroudsendsthefueloverboardthroughadrain【v.排水】

mast【n.竖管；直立柱】.APUFuelFeedThewholenameofAPU:auxiliarypowerunitThemaincomponentsofAPUfuelfeedsystem:fuelfeedline,fuelfeedlineshroud,fuelshutoffvalve,DCboostpumpThepressureofAPUfuelfeedcomesfrom:centertankandmaintankboostpumps,suctions,DCboostpump.ThefunctionofAPUfuelfeedlineshroudis:tocollectfuelleaksfromtheline,andsendtheleakageoverboardthroughadrainmast.APUFuelFeedDefuelThehighlightsofdefuel:Therearetwowaystodefuelthefueltanks:pressuredefuelandsuctiondefuel.Thedifferentbetweenthetwowaysintheiroperation.Thedefuelsystemcantransferfromonefueltanktoanotherontheground.FuelIndicatingThefuelquantityindicatingsystem(FQIS)measurefuelweightinthefueltanks.Thecommondisplaysystem(CDS)【公共显示系统】andthefuelingpanelshowfuelquantity.FuelIndicatingThefuelquantityprocessorunitsendsexcitationtoandreceivessignalsfromthetankunitsandthecompensators.Thefuelquantityprocessorunitusesthesesignalstocalculatefuelquantityineachtank.燃油量处理组件发出激励信号给油箱组件和补偿器，同时接收它们的返回信号。燃油量处理器使用这些返回信号来计算每个油箱的燃油量。Thereare32tankunitsinthefueltanks.Thereare12tanksunitsinmaintank1and12tankunitsinmaintank2.Thereare8tankunitsinthecentertank.FuelIndicatingTankunitcapacitancevariesasafunctionofthefuellevelinthetank.Thereisonecompensatorineachtank.Compensatorprovidereferencecapacitancesignaltoallowtheprocessortodeterminethefueldielectric【n.电介质；绝缘体】constant.Thedielectricconstantandtankcapacitanceareusedtocalculatefuelvolumeanddensity.FuelIndicatingThefuelquantityisshowedontwopositions:

CDS(commondisplaysystem)andfuelingpanelThemaincomponentsinthefuelindicating:

fuelquantityprocessorunit,tankunits,compensatorsThefunctionofthetankunitsandcompensators.Thefuelquantityshowsinweight.FuelIndicatingFuelTemperatureIndicatingSystemCanthe737NGshowtheallfueltanktemperature?Whichcomponentusedtomeasuretemperature?Doyouneeddefueltank,ifyouwanttoremovetemperaturebulb?FuelMeasuringStickYoumanuallymea