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1、附录AHydraulicsystemC.J.Sexton,S.M.LewisandC.P.PIeaseUniversityofSouthampton,UKAbstract:Acompletehydraulicsystemconsistsoffiveparts,namely,powercomponents,actuators,controlcomponents,auxiliarycomponents(accessories)andhydraulicoil.Thefunctionofhydraulicsystemistohelphumanwork,mainlythroughthei
2、mplementationofcomponentsintothepressureofrotationorreciprocatingmovement.Otheradvantagesofthehydraulicsystemincludebi-directionalmovement,overloadprotection,andvariablespeedcontrol.Inanyoftheexistingpowertrainsystems,thehydraulicsystemalsohasthelargestunitmasspowerratio.Sealsandsealsareanim
3、portantpartofhydraulicequipment.Itsreliabilityandservicelifeisanimportantindextomeasurethequalityofhydraulicsystem.Keywords:Apowerelement;anactuatingelement;acontrolelement;anauxiliaryelement;hydraulicfluidGenerally,thereareonlythreebasicwaystotransmitpower:electrical,mechanical,andhydraulic
4、.Mostapplicationsactuallycombinethethreemethodsintothemostefficientandcomprehensivesystem.Inordertoreasonablydeterminewhichmethodtotake,itisimportanttounderstandthesalientfeaturesofthevariousmethods.Forexample,thehydraulicsystemtransmitspowermoreeconomicallyoveralongdistancethanamechanicalsy
5、stem.Thehydraulicsystem,however,hasashortertransmissiondistancethantheelectricalsystem.Hydraulictransmissiontherearemanyoutstandingadvantages,itiswidelyused,suchasthegeneralindustrialuseofplasticsprocessingmachinery,pressuremachinery,engineeringmachinery,machinetoolsandothermechanicalequipme
6、nt;applicationofconstructionmachinery,agriculturalmachinery,automobileandothermetallurgicalmachinery;ironandsteelindustry,liftingmachinery,arolleradjustmentdevice;controlgatedeviceinthewaterconservancyproject,riverbedliftingdevice,bridgesandotheroperatingmechanism;highspeedturbinepowerplante
7、quipment,suchasnuclearpowerplants;shipdeckwithcrane(winch),bowdoor,bulkheadvalvesternthruster;specialtechnologygiantantennawithcontroldevicesmeasurementbuoysmovementssuchasrotatingstage;militaryindustrialcontroldevicesusedinartilleryshipantirolling
