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1、HydraulicSystemHydraulicpresserdriveandairpressuredrivehydraulicfluidasthetransmissionismadeaccordingtothe17thcentury,Pascal'sprincipleofhydrostaticpressuretodrivethedevelopmentofanemergingtechnology,theUnitedKingdomin1795•BramanJoseph(JosephBraman,1749-1814
2、),inLondonwaterasamediumtoformhydraulicpressusedinindustry,thebirthoftheworld'sfirsthydraulicpress.Mediaworkin1905willbereplacedbyoil-waterandfurtherimproved.AftertheWorldWarI(1914-1918),becauseoftheextensiveapplicationofhydraulictransmission,espec-iallyafte
3、r1920,morerapiddevelopment.Hydrauliccomponentsinthelate19thcenturyabouttheearly20thcentury,20years,onlystartedtoentertheformalphaseofindustrialproduction.1925Vickers(F.Vikers)theinventionofthepressurebalancedvanepump,hydrauliccomponentsforthemodernindustrial
4、orhydraulictransmissionofthegradualestablishmentofthefoundation.Theearly20thcenturyG•Constantimscofluct-uationsoftheenergycarriedoutbypassingtheoreticalandpracticalresearch;in1910onthehydraulictrans-mission(hydrauliccoupling,hydraulictorqueconverter,etc.)con
5、tributions,sothatthesetwoareasofdevelo-pment.TheSecondWorldWar(1941-1945)period,intheUnitedStates30%ofmachinetoolapplicationsinthehydraulictransmission.ItshouldbenotedthatthedevelopmentofhydraulictransmissioninJapanthanEuropeandtheUnitedStatesandothercountri
6、esfornearly20yearslater.Beforeandafterin1955,therapiddevelopmentofJapan'shydraulicdrive,setupin1956,"HydraulicIndustry."Nearly20to30years,thedevelopmentofJapan'sfasthydraulictransmission,aworldleader.HydraulictransmissionTherearemanyoutstandingadvantages,iti
7、swidelyused,suchasgeneralindustr-ialuseofplasticsprocessingmachinery,thepressureofmachinery,machinetools,etc.;operatingmachineryengineeringmachinery,constructionmachinery,agricultural22machinery,automobiles,etc.;ironandsteelindu-strymetallurgicalmachinery,li
8、ftingequipment,suchasrolleradjustmentdevice;civilwaterprojectswithflo-odcontrolanddamgatedevices,bedliftsinstallations,bridgesandothermanipulationofinstitutions;speedturbinepowerplantinstallatio
