HydraulicPower航空工程技術英語AbbreviationsandAcronyms1.AC?alternatingcurrent2.ALT?alternate3.APU?auxiliarypowerunit4.AUTO?automatically5.BAT?battery6.CLSD?closed7.CONT?control8.CT?currenttransformer9.DC?directcurrent10.EDP?engine?drivenpump11.ELCU?electricalloadcontrolunit12.ELEC?electrical13.ELEV?elevator14.EMDP?electricmotor?drivenpump15.ENG?engine16.EXCH?exchanger17.FWD?forward18.GPM?gallonsperminuteAbbreviationsandAcronyms19.HYD?hydraulic20.FLT?flight21.GND?ground22.KG?kilograms23.KTS?knots24.LE?leadingedge25.LT?left26.MLG?mainlandinggear27.NLG?noselandinggear28.NORM?normal29.PRESS?pressure30.PSI?poundspersquareinch31.PTU?powertransferunit32.QTY?quantity33.RT?right34.RUD?rudder35.STBY?standby36.SW?switchHydraulicPowerSystemThreeseparateandindependenthydraulicsystemareprovidedtopowertheflightcontrols,landinggear,andthrustreversers.SystemAandsystemBarefull-timeoperatingsystemduringflightthatshareresponsibilityforallhydraulicallypoweredcomponents.Thestandbysystemisoperatedonlyondemand.HydraulicPowerSystem目錄CONTENTSHydraulicSystemA01HydraulicSystemB02StandbySystem03Maintenance04HydraulicSystemAPART011.HydraulicSystemASystemAhydraulicpoweroperatesthefollowingsystems:LandinggearNosewheelsteeringLeftthrustreverserAilerons–powercontrolunitandautopilotactuatorElevators–powercontrolunitandautopilotactuator.Elevatorfeel1.HydraulicSystemASystemAhydraulicpoweroperatesthefollowingsystems:RudderInboardflightspoilers3and6GroundspoilersAlternatebrakesPowertransferunit1.HydraulicSystemASystemApressureisprovidedbyoneenginedrivenpump(EDP)andoneelectricmotordrivenpump（EMDP).A28vdcmotoroperatedshutoffvalveinthesupplylinebetweenthereservoirandtheenginedrivenpumpisnormallyopen.thisvalveisclosedandstopstheflowofhydraulicfluidtotheenginewhenthefirehandleispulled.1.HydraulicSystemANormalsystemconfigurationiswithbothpumpsoperatingtooutputfluidpressurizedto3000psithroughthepressuremoduletotheusingsystem.Thepressuremodulecontainspressurefilter,lowpressureswitches,checkvalvesandapressurereliefvalve.Coolingandlubricatingfluidfromthepumpsisfilteredandroutedthroughaheatexchangerinthenumberonefueltankbeforeenteringthereservoir.Returnfluidfromthesuingsystemsisfilteredatthereturnmodulebeforeenteringthereservoir.HydraulicSystemBPART022.HydraulicSystemBHydraulicsystemBprovidesfluidunderpressureof3000psitoportionsoftheflightcontrol,landinggear,andthrustreversersystems.SystemBhydraulicpoweroperatesthefollowingsystem:MainwheelbrakesRightthrustreverserAilerons–powercontrolunitandautopilotactuatorElevators–powercontrolunitandautopilotactuator.2.HydraulicSystemBElevatorfeelRudderOutboardflightspoiler2and7TrailingedgeflapsLeadingedgeflapsandslatsAlternatelandinggearretractionAlternatenosewheelsteering2.HydraulicSystemBSystemBhydraulicpressureisprovidedbytwohydraulicpumps,anEDP(enginedrivenpump)andanEMDP(electricmotordrivenpump).thepumpsaresuppliedwithfluidfromareservoirpressurizedwithpneumaticair.Outputofthepumpsisroutedtoapressuremoduleandfromtheretotheusingsystems.Returnfluidfromtheusingsystemisroutedthroughareturnfiltermodulethentothereservoir.Drainfluidfrombothpumpsisroutedthroughaheatexchangerbeforegoingtothereservoir.StandbySystemPART033.StandbySystemThestandbysystemhydraulicpumpsuppliespressurizedfluidondemandto:standbyrudderactuatortheleadingedgedevicesthethrustreversersasrequiredMaintenancePART044.MaintenanceTherearethreeindependenthydraulicsystemsthatsupplyhydraulicpowerforusersystems.Warning:Hydraulicfluid,bms3-11,cancauseinjurytopersons.Ifyouget