液压英文文献翻译.docx

液压英文文献翻译.docx

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液压英文文献翻译

Hydraulicsystem

Chapter1Introduction

HydraulicPumpStationalsoknownasthestationsareindependenth-ydraulicdevice.

Itrequestedbytheoilgradually.Andcontrollingthehydraulicoilflowdirection,pressureandflowrate,appliedtothemainframeandhy-draulicdevicesseparabilityofhydraulicmachinery.

Userswillbeprovidedafterthepurchasehydraulicstationandhostofimplementingagencies（motoroilorfueltanks）connectedwithtubing,Hydraulicmachinerycanberealizedfromthesemovementsandtheworkcycle.

Hydraulicpumpstationisinstalled,Manifoldorvalvecombination,t-anks,acombinationofelectricalboxes.

Functionalcomponents:

Pumpdevice--isequippedwithmotorsandpumps,hydraulicstationisthesourceofpower.tomechanicalenergyintohydraulicoilpressurecanbe.

Manifold--fromhydraulicvalvebodyandchannelassembled.Rightdirectionforimplementationofhydraulicoil,pressureandflowcontrol.

Valveportfolio--platevalveisinstalledinupboardafterboardconn-

ectswiththesamefunctionalIC.

Tank--plateweldingsemi-closedcontainers,alsoloadedwithoilfilteringnetwork,airfilters,usedoil,oilfiltersandcooling.

Electricalboxes--atthetwopatterns.Asetofexternalfuseterminalplate;distributionofafullrangeofelectricalcontrol.

HydraulicStationprinciple:

motordrivenpumprotation,whichpumpoilabsorptionfromtheoiltank.tomechanicalenergyintohydraulicpressuretothestation,hydraulicoilthroughManifold（orvalvecombinations）realizedthedirection,pressure,Afteradjustingflowpipeandexternaltothecylinderhydraulicmachineryormotoroil,soastocontrolthedirectionofthemotivefluidtransformationforcethesizeandspeedthepaceofpromotingthevariousactinghydraulicmachinery.

1.1Adevelopmentcourse

ChinaHydraulic（includinghydraulic,thesamebelow）,pneumaticandsealsindustrialdevelopmentprocesscanbebroadlydividedintothreephases,namely:

20early1950stotheearly1960s,theinitialstage;60'sand70forspecializedproductionsystem;80~90'sgrowthstagefortherapiddevelopmentstage.Which,hydraulicindustryintheearly1950sfromthemachinetoolindustryproductionoffakeSu-grinder,broachingmachine,copyinglathe,andotherhydraulicdrivestarted,HydraulicComponentsfromtheplanthydraulicmachineshop,self-occupied.Afterenteringthe1960s,theapplicationofhydraulictechnologyfromthemachinegraduallyextendedtotheagriculturalmachineryandmechanicalengineeringfields,attachedtotheoriginalvelocityofhydraulicshopsomestandoutaspiecesofhydraulicprofessionalproduction.Tothelate1960s,early1970s,withthedevelopmentofmechanizedproduction,especiallyinthesecondautomobilefactoryinprovidingefficient,automatedequipment,alongwiththeHydraulicComponentsmanufacturinghasexperiencedrapiddevelopmentofthesituation,agroupofSMEshavebecomeprofessionalhydraulicpartsfactory.1968China'sannualoutputofhydrauliccomponentshavenearly200,000in1973,machinetools,agriculturalmachinery,mechanicalengineeringindustries,theproductionofhydraulicpartsfactoryhasbeentheprofessionaldevelopmentofmorethan100andanannualoutputmorethanonemillion.anindependenthydraulicmanufacturingindustryhasbeguntotakeshape.Then,hydraulicpiecesoffakeproductsfromtheSovietUnionfortheintroductionoftheproductdevelopmentandtechnicaldesigncombiningtheproductstothepressure,Hypertension,andthedevelopmentoftheelectro-hydraulicservovalvesandsystems,hydraulicapplicationareasfurtherexpanded.Aerodynamicthanthestartoftheindustrialhydraulicyearslater,in1967begantoestablishprofessionalpneumaticcomponentsfactory,PneumaticComponentsonlyascommodityproductionandsales.Sealedwithrubberandplastics,mechanicalsealsandsealingflexiblegraphitesealingindustry,theearly1950sfromtheproductionordinaryO-rings.rubberandplasticsextrusion,suchasoilsealsealingandsealasbestosproductsstarttotheearly1960s,begunproductionofmechanicalsealsandflexiblegraphitesealingproducts.1970s,theburningoftheformerMinistry,aMinistry,theMinistryofAgriculturalMechanizationSystem,agroupofprofessionalproductionplantshavebeenestablished,andtheofficialestablishmentofindustriestosealindustrialdevelopmenthaslaidthefoundationforgrowth.

Sincethe1980s,inthecountry'sreformandopeninguppolicyguidelines,withthedevelopmentofthemachineryindustry,basedmainframepiecesbehindtheconflictshavebecomeincreasinglyprominentandattractedtheattentionoftherelevantdepartments.Tothisend,theMinistryoftheoriginalonein1982,formedthebasisofcommonpiecesofIndustry,willbescatteredintheoriginalmachinetools,agriculturalmachinery,mechanicalengineeringindustriescentralizedhydraulic,pneumaticandsealsspecializedfactories,placingthemundercommonmanagementinfrastructurepiecesBureau,sothattheindustryintheplanning,investment,technologyandscientificresearchanddevelopmentinareassuchasinfrastructurepiecesBureauofguidanceandsupport.Sincethenenteredaphaseofrapiddevelopment,hasintroducedmorethan60itemsofadvancedtechnologyfromabroad,includingmorethan40itemsofhydraulic,pneumatic7.Afterdigestionandabsorptionandtransformation,nowhavemassproduction,andindustry-leadingproducts.Inrecentyears,theindustryincreasedthetechnologicaltransformationefforts,in1991,Localenterprisesandtheself-financingtotalinputofabout20billionyuan,ofwhichmorethan1.6billionyuanHydraulic.Throughtechnologicaltransformationandtechnologyresearch,andanumberofmajorenterprisestofurtherimprovetheleveloftechnology,techniqueandequipmenttobegreatlyimproved.Inordertoformahigherstartingpoint,specialization,andrunproductionhaslaidagoodfoundation.Inrecentyears,manycountriesinthedevelopmentofcommonownershipguidelines,underdifferentownershipSMEsrapidriseshowinggreatvitality.Withthefurtheropeningup,three-fundedenterprisesrapiddevelopmentofindustrystandardsforimprovingandexpandingexportsplayanimportantrole.Today,ChinahasandtheUnitedStates,Japan,Germanyandothercountriesfamousmanufacturersjointventuresorwholly-ownedbyforeignmanufacturerstoestablishapistonpump/motor,planetaryreductiongears,steeringgear,hydrauliccontrolvalve,hydraulicsystem,hydrostatictransmission,hydraulicCasting.pneumaticcontrolvalve,cylinder,gasprocessingtriplepieces,mechanicalseals,rubberandsealproductsmorethan50productionenterprises,attractingforeigninvestmentover200millionU.S.dollars.

1.2thecurrentsituation

1.21BasicProfiles

After40yearsofefforts,Chinahydraulic,pneumaticandsealingindustryhasformedarelativelycompletecategories.acertainleveloftechnicalcapacityandtheindustrialsystem.Accordingtothe1995ThirdNationalIndustrialCensusstatistics,hydraulic,Pneumaticsealsandindustrial370,000annualsalesincomeof100millionyuaninstate-owned,village-run,privateandcooperativeenterprises,individual,"threecapital"enterpriseswithatotalofmorethan1,300,ofwhichabout700hydraulic,Pneumaticsealsandtheapproximately300thousand.By1996withtheinternationaltradestatistics,thetotaloutputvalueofChina'sindustryhydraulic2.348billionyuan,accountingfortheworld's6;Pneumaticindustryoutput419millionyuan,accountingforworldNo.10.

1.22thecurrentsupplyanddemandprofiles

Throughtheintroductionoftechnology,independentdevelopmentandtechnologicalinnovation,andhigh-pressurepistonpump,gearpumps,vanepump,GeneralMotorshydraulicvalves,tanks,Non-lubricatedaerodynamicpiecesandvarioussealsofthefirstlargetechnologyproductshasincreasednoticeably.stabilityofthemassproductionmay,forvariousmainframeproductsprovidealevelofassurance.Inaddition,hydraulicandpneumaticcomponentsoftheCADsystem,pollutioncontrol,proportionalservotechnologyhasscoredsomeachievements,andisalreadyinproduction.Currently,hydraulic,pneumaticandsealsproductstotalabout3,000species,morethan23,000specifications.Amongthem,thereare1,200hydraulicvarieties,morethan10,000specifications（includinghydraulicproducts60varieties500specifications）;Pneumaticare1,350varieties,morethan8,000specifications;Rubberseal350speciesmorethan5,000specificationshavebeenbasicallycatertothedifferenttypesofmainframeproductstothegeneralneeds,completesetsofequipmentformajorvarietiesofmatchingratewasover60%,andstartedasmallamountofexports.

1998piecesofhomemadehydraulicoutput4.8million.salesofabout28billion（ofwhichabout70%mechanicalsystems）;aerodynamicpiecesyield3.6million.salesofabout5.5billion（ofwhichabout60%ofmechanicalsystems）;Sealsoutputofabout800million.salesofabout10billion（ofwhichabout50%mechanicalsystems）.AccordingtotheChinaHydraulicPneumaticSealsIndustryAssociation1998annualreport,hydraulicproductsalesrateof97.5%（101%forhydraulic）,pneumatic95.9%,98.7%sealed.Thisfullyreflectsthebasicmarketingconvergence.

Myhydraulic,pneumaticandsealingindustryhasattainedagreatdealofprogress,butwithmainframedevelopmentneeds,andtheworld'sadvancedlevel,therearestillmanygaps,mainlyreflectedintheproductvariety,performanceandreliability,andsoon.Hydraulicproductsasanexample,productsabroadonlyone-third,lifeforhalfabroad.Inordertomeetkeymainframe,andmainframeimportsofmajortec