混凝土泵车液压系统的认识外文文献翻译、中英文翻译

附录附录AUnderstandingofconcretepumphydraulicsystemPumpingHydraulicsystemBoomhydraulicsystemOutriggerhydraulicsystemHydraulicsystemdiagramDailycheckandmaintenanceofthehydraulicsystemThefunctionsofthetruckmountedconcretepump,hydraulicsystemcanbedividedintopumpinghydraulicsystem,boomhydraulicsystem,outriggerhydraulicsystem.PumpingHydraulicsystemIsdividedintothreeparts:mainpumpingsystem,distributionandlubricatingsystem,mixingandcoolingandcleaningsystem.MainpumpingsystemTherearetwohydraulicloops:openandcloseloop.TheOpenloop:usesanA11VLO190variabledisplacementofaxialpistonpump.Itisfittedwithaconstantpowercontroldevice,pressurecut-offvalveandelectricalstrokelimiterwithproportionalsolenoid.Theconstantpowercontroldevicehasbeensetinthefactory.Thedisplacementcanbeadjustedfrom0toMaximumbyturningtheoilpumpdisplacementpotentiometeronthecontrolpanelfromlowtohigh.Fig.1A11VLO190Suctionport(withchargingpump)35Theotheristhecontrolline,whichcanchangetheflowdirectionandthedisplacementofmainpumpthroughconstantpowervalve,proportionalsolenoidpressurereducingvalve,directionalcontrolvalveandservovalveofmainpump.TheClosedloop:Thereisanauxiliarypumpwithreliefvalvethatthesettingpressureis3.5MpainA4VG180.Theauxiliarypumphastwooutputways.Oneisthechargeoilline,whichconnectswithsuctionlineofmainpumpthroughthecheckvalveintwopressurereliefvalvesandaddoiltomainpump.Atthesametimeexcessivehydraulicoilreturntooiltankthroughflushingvalveandcoolertorealizeheatexchangeforclosedloop.A,BServicelineportsSAE11/4",highpressureseries420barT1CasedrainorfillingportT2CasedrainM33×2;18deepMA,MBPressuregauge-operatingpressureA,BRAirbleedSBoostsuctionportX1,X2Controlpressureports(beforetheorifice)GPressureportforauxiliarycircuitPSControlpressuresupplyFaFilteroutletFa1Filteroutlet(filterassembly)FeFilterinletM33×2;18deepFSPortfromfiltertosuctionline(coldstart)MHPortforbalancedhighpressureY1,Y2Remotecontrolports(onlyforHDcontrol)FlushingvalveUsedforclosedlooptopreventexcessiveheatbuild-upinclosedcircuitoperation.Thesettingpressureofflushingvalveis3.0MPaPressurereducingvalvewithproportionalsolenoidUsedforclosedloop.TheOutputpressureisconnectedwiththeremotecontrolportofmainpumptocontrolthedisplacementandiscontrolledbyaproportionalcurrentsignalandconstantpowervalve.Thedisplacementcanbeadjustedfrom0toMaximumbyturningthedisplacementadjustingpotentiometer.ConstantpowervalvePowersettingUsedforclosedloop.Whenthehydraulicsystempressureisoverthesettingpressure,thevalveworkstoreducetheoutputpressureofthepressurereducingvalveandmaintaintheconstantpower.PowersettingPilotpressuresettingPilotpressuresettingFig.3ConstantpowervalveMainpumpsuctionfilterOpenloop:filtrationfineness100u.Closeloop:filtrationfineness20u.Whentheindicatorinthevacuumgaugeexceedsthesafeareaortheelectricsignalinstrumentgivesawarning,thecartridgemaybeblocked.Itshouldbecleanorreplacefiltercartridgepromptly.Filterfiltrationfinenessis20uinopenloop.Whenthereadingpressureofthevacuumgaugeexceeds0.35Mpa,thecartridgemaybeblocked.ItshouldbecleanorReturnfilterreplacefiltercartridgepromptly.Filterfiltrationfinenessis10uinclosedloop.Whentheelectricitydeliverreportstothepolice,thecartridgemaybeblocked,itshouldbecleanorreplacefiltercartridgepromptly.DistributionandlubricatingsystemConstantpressurepumpSettingscrewforpressurecontrolzero/Strokepressure Fig.4ConstantpressurepumpSettingscrewforpressurecontrolzero/StrokepressureAnA10VO28constantpumpisusedforthedistributionsystemofsupplyoil.Thesettingofthepressurecontrolvalveofthepumpis16Mpa.Oncethesystempressureisreached,thebumpwillkeepthispressurethendecreasethedisplacement.Thereisapressurereliefvalveinthedistributioncircuittoactasasafetyvalve,whichissetto18Mpa.Plateballvalve(shut-offvalve)Usedtodischargetheaccumulator.Itmustberotatedtheleverofshut-offvalveanti-clockwisewhenthepumpingfinishesorstoppedformaintenance,inordertodischargethepressureoftheaccumulator.(Pressuregaugeofdistributionsystemiszero)AccumulatorInflationpressureis8-9Mpa.UseOnlyNitrogentofilltheaccumulator.Chargingpressureshouldnotexceedthesefigures.LubricatingsystemTherearetwotypes.Oneisreciprocatingcentralizedlubricationthatisdrivenbyoilfromtheswingcylindersofdistributionsystemincludeslubricatingsinglepump(ordoublepump),distributor,damperandfilter.TheotherisautomaticcentralizedlubricationthatisdrivenbyaD.Cmotorwithanindependentgreasetankandindependentfromthehydraulicsystem.Theintervaltimeoflubricationiscarriedoutinthefactory.Thelubricationsystemworksautomaticallywhenpumping.Mixing,cooling,cleaningsystemOnlytheMixing,cooling,cleaningsystemaredrivenbymotorinopenloop.GearpumpGearpumpsuppliesoiltothemixing,cooling,cleaningsystem.SandwichtypereliefvalveThepressureissetto14Mpa.RessurerelayIfthemixingbladeisstuck,thesystempressurewillraise.Whenthepressureexceedsthesettingvalue(usually10Mpa),thepressurerelaywillgiveawarning.TheSolenoiddirectionalcontrolvalvechangesdirectiontoletthemixingmotortorotateanti-clockwise.After6secondthesolenoidvalvewillreset,andthemixingmotorwillrotateclockwiseagain.ReturnfilterThefiltrationfinenessis10uinclosedloop.Thecartridgemaybeblockedwhentheelectricalarmsounds.Itshouldbereplacepromptly.BoomhydraulicsystemBoompumpBoomandoutriggerusethesamepump.37mand40mtruckmountedconcretepumps:A2FO23fixeddisplacementpump44mand47mtruckmountedconcretepumps:A7VO55LRDSvariabledisplacementpump,orA7VO55DRSvariabledisplacementpump46mand49mtruckmountedconcretepumps:A7VO55LRDSvariabledisplacementpumpFig.5A7VO55DRSFig.6A7VO55LRDSFig.7A2FO23BoomproportionaldirectionalspoolvalveTheproportionaldirectionalspoolvalvewithelectro-hydraulicconsistsofpressurereliefvalve,pressurereducingvalve,andflowcontrolvalve,andcanbecontrolledmanualorbyremotecontrol. Fig.8BoomproportionaldirectionalspoolvalveLoad-holdingvalveLoad-holdingvalvehasthreefunctions.(1)Itactsasalockwhenthecylinderisn’tmoving.(2)Load-holdingvalvehastwicerelieffunctiontoprotectboomagainstvibrating.Itwillbeadjustedinthefactory.(3)WhentheboommovesdownwardasSlewingload-holdingvalvegravityload,itcanlimitspeedtopreventtheboomfallingtooquicklyandshaking.Therearethreemainfunctions.Lock,overloadprotectionandspeedlimiting.OutriggerhydraulicsystemOutriggerhydraulicsystemandboomhydraulicsystemareusedthesamepumptosupplyoil.Outriggersshouldbesetupbeforetheboomisoperatedbythecontrolleversorelectriccontrolbuttononbothsidesofthetruckmountedconcretepump.OutriggerproportionaldirectionalspoolvalveItisanintegratedunitwithareliefvalveinsidetocontrolmaximumpressureoftheoutriggerhydraulicsystem.PressurereliefvalvePressurereliefvalveFig.9OutriggerproportionaldirectionalspoolvalveOutriggerhydrauliclockItisusedtolocktheoutriggercylindersandpayattentiontotheverticalmovingoftheoutriggercylinderwhenworking.附录B混凝土泵车液压系统的认识泵送单元液压系统臂架液压系统支腿液压系统液压原理图液压系统的日常保养及维护泵车液压系统按泵车功能可划分为泵送单元液压系统、臂架液压系统、支腿液压系统。泵送单元液压系统：泵送单元液压系统按功能可分为三大部分：主泵送油路系统；分配及润滑油泵驱动系统；搅拌、冷却、清洗油路系统。主泵送油路系统：主泵送系统按油液循环方式分为开式液压回路和闭式液压回路两种。图1泵A11VLO190图1泵A11VLO190（其他情况下油口G堵住）闭式液压回路：采用A4VG180双向周向变量柱塞泵，该泵带内置补油泵，补油溢流阀调定压力3.5MPa，其出口油路可分为两路：第一路为补油油路，通过两高压溢流阀内的单向阀，始终与主泵吸油油路相通，对主泵送油路进行补油，同时多余的油液经冲洗阀、冷却器流回油箱，实现对闭式油路系统的热交换。第二路为控制油路，经恒功率阀、电磁比例减压阀、换向阀及泵内伺服缸伺服阀，实现主泵的变量及液流流动方向的改变。图2油泵A4VG180A,B工作油口SAE11/4"高压系列420barT1壳体泄油或注油口T2壳体泄油口M33×2，深18MA,MB压力表、工作压力A，BRS吸油口X1,X2控制压力口（在节流孔前）G辅助回路压力口PS控制压力供油口Fa过滤器出口Fa1过滤器出口（装配过滤器）Fe过滤器进口M33×2，深18FS从过滤器到吸油管的接口（冷启动）MH平衡高压油口Y1,Y2遥控口（仅对于HD控制）冲洗阀仅用于闭式液压回路，用于实现闭式回路油液的交换。冲洗阀的设定压力为3.0MPa电磁比例减压阀仅用于闭式液压回路，其出口压力接主油泵远程控制口，控制油泵排量。出口压力受比例电流及恒功率阀的控制。遥控器或电控柜面板上油泵排量旋钮由小变大范围内调节时，主油泵排量在0～最大范围内变化。恒功率阀仅用于闭式回路，当回路工作压力超过设定压力时，恒功率阀起作用。图3恒功率阀主泵吸油滤油器开式回路：过滤精度为100μ闭式回路：过滤精度为20μ当真空表指示超出安全区或电发讯器报警时，滤芯可能堵塞，应及时清洗或更换。回油滤油器开式回路：过滤精度为20μ。当真空压力表超过0.35MPa时，滤芯可能堵塞，应及时清洗或更换。闭式回路：回油过滤精度为10μ。电发讯器报警时，滤芯可能堵塞，应及时清洗或更换。分配及润滑油泵驱动系统恒压泵分配系统采用A10VO28恒压泵供油，其自带的压力控制阀设定压力为16Mpa。用于零点压力设定的控制螺杆报警压力图4恒压泵用于零点压力设定的控制螺杆报警压力当系统压力达到设定压力时，泵保持设定压力不变，但油泵排量减小，仅供图4给执行元件所需流量。分