直升机专业英语

直升机工程英语航空机电设备维修（直升机）专业A109EHelicopterLesson1TheA109EFuselageFig1-1A109EHelicopterTEXT•[1]TheA109Eisahigh-speed,high-performance(性能),multi-purpose（多用途）helicopterpoweredbytwoengines,with:•—Four-bladed（桨叶）,fullyarticulated（全铰接式）mainrotor•—Titanium（钛）/composite（复合材料）mainrotorheadwithelastomericbearings（橡胶轴）•—Two-bladedtailrotor（双叶尾桨）•—Retractabletricycle-typelandinggear（三轮车伸缩式起落架）.TEXT•[2]Thehelicopterisdesignedtofulfillmanyroles,whichincludetransportofpersonnel,equipmentandcargo.Itmayalsobeusedforaerialsupplyandrescueoperations（空中作业和救援）.Optionalequipmentmaybefittedforspecificmissions(ambulanceduties,transportofexternalloads,etc).TEXT•[3]Theairframeconsistsoftwomajorassemblies:theforwardfuselageandtheaftfuselage(tailboom).Theforwardfuselagecomprisesthenosesection,thecabinandtherearsection（机头部分，座舱和车尾部分）.•[4]Thenosesectionincludesanuppercompartment{仓}fortheelectricandelectronicequipment,andalowercompartmentwhichaccommodatesthehydraulicsystemaccumulators液压系统蓄能器,thenoselandinggearandotherhydrauliccomponents前起落架液压元件及其他.TEXT•[5]Thecabinincludesthecrew（机组）compartment(cockpit)andthepassenger（乘客）compartment.Ahingeddoor,onbothsidesofthecabin,permitsdirectaccesstothecockpit,andalargehingeddoorislocatedonbothsidesofthecabinforaccesstothepassengercompartment.Seatingisprovidedforthepilot(rightside)andapassenger(orcopilot)inthecockpit,andsixpassengersintherelevantcompartment.TEXT•[6]Therearsectionaccommodates可容纳thefueltanks,themainlandinggearcompartments,thebaggagecompartmentandtheelectricandelectronicequipmentcompartments.•[7]Theupperdeck,locatedaboveandaftofthecabinarea,accommodatesthehydraulicsystemreservoirsandfiltergroups,themaintransmission,themaintransmissionandengineoilcoolers冷却andtherelevantfans,andtheengines.Theupperdeckisenclosedbyremovablefairingsandcowlings上层是封闭的可移动整流罩和整流罩.TEXT•[8]Thetailboomisboltedtotheforwardfuselageandsupportsthetailrotor尾桨andtherelevantdrivesystem.Thetailboomincludestheelevators,theverticalfin,thetailskidandthetailcone.•[9]Thefuselageisdividedintothreereferenceplanesmeasuredinmillimeters.Thisprovidesameansofidentifyingthelocationofcomponentsorparticularpoints.AirframeReferenceLinesTEXT•STATIONLINES(STA)•Thestationlinesareverticalplanesperpendicularto,andmeasuredalongthelongitudinalaxisofthehelicopter.Thestationlinesaremeasuredinmillimetersfromareferencepoint(STA0).STA0is3362mmforwardofthemainrotorheadcenter.TEXT•WATERLINES(WL)•Thewaterlinesarehorizontalplanesperpendicularto,andmeasuredalongtheverticalaxisofthehelicopter.Thewaterlinesaremeasuredinmillimetersfromareferencepoint(WL0).WL0is2494mmbelowthemainrotorheadcenter.TEXT•BUTTLINES(BL)•Thebuttlinesareverticalplanesperpendicularto,andmeasuredtotheleftandrightalongthelateralaxisofhelicopter.BL0istheplaneoftheverticalcenterlineofthehelicopter.Lesson2AirDistributionSystemFigure2-1AirDistributionSystemTEXT•[1]Theairconditioningsystemincludestheairdistributionsystem,theoptionalenvironmentalcontrolsystemandtheheatingsystem.Theairdistributionsystemconsistsoftwoindependentsub-systems:•—Thecabinventilating-windshielddefoggingsystem•—Thepassengercompartmentventilatingsystem.•Theschematicoftheairdistributionsystemisillustratedinfigure2-1.TEXT•[2]Thecabinventilation-windshielddefoggingsystemconsistsmainlyofanairintakelocatedonthefuselagenose.Fromtheairintaketheramairisductedtoeightdiffusersandtwooutletvalves.•[3]Theairflowfromthenoseairintakeiscontrolledbythegatevalve,installedintheairmixingbox,mechanicallyconnectedtotheVENTknobontherightsideofthefrontconsole.Theairflowfromthenoseairintakemaybeincreasedbymeansofanelectricalfaninstalledbetweentheairintakeandtheairmixingbox.TEXT•[4]TheelectricalfaniscontrolledbytheVENTCKPTtoggle-typecircuitbreaker(switch)locatedontheelectricalcontrolpaneloftheoverheadconsole.Thefanelectricalcircuitispoweredbythe28Vdcno2busbarthroughtheVENTCKPTcircuitbreakerontheoverheadconsole.OperationofthefanisindicatedbytheVENTONadvisorylegendonEDU2.TEXT•[5]Thepassengercompartmentventilatingsystemconsistsmainlyofanairscoop,locatedontheupperdeckandconnectedtoaflexibleductinstalledontheceilingofthecompartment.Fromtheairscoop,matingwiththeairintakeobtainedinthetransmissionfrontfairing,theramairenterstheflexibleductonwhichareinstalledsixairvalves.Whenthehelicopterisprovidedwiththeenvironmentalcontrolsystem,theairscoopisnotinstalledandtheflexibleductonthepassengercompartmentisconnectedtotheenvironmentalcontrolsystem.Lesson3EnvironmentalControlSystemEnvironmentalControlSystemEnvironmentalControlSystemAirConditioningUnit-SchematicTEXT•[1]ThefunctionoftheEnvironmentalControlSystem(ECS)istosupplyatemperaturecontrolledairflow,underalightpressure,tothecabininordertomaintainacomfortabletemperatureinthecockpitandinthepassengercabin.TheECSconsistsofenginebleedaircircuit,airconditioningunitandairdistributioncircuit.TEXT•[2]Theenginebleedaircircuitsuppliescompressedair,bledfromtheengines,totheairconditioningunit.Fromthetwobleedconnectionsofeachengine,thecompressedairisdirectedthroughtwolinesandshut-offvalves,toaY-shapedtube.FromtheY-shapedtubethecomp