液压剪板机的液压系统设计外文文献翻译中英文翻译外文翻译.docx

液压剪板机的液压系统设计外文文献翻译中英文翻译外文翻译.docx

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液压剪板机的液压系统设计外文文献翻译中英文翻译外文翻译

Hydraulicplateshearshydraulicsystemdesign

Hydraulicpresserdriveandairpressuredrivehydraulicfluidasthetransmissionismadeaccordingtothe17thcentury,Pascal'sprincipleofhydrostaticpressuretodrivethedevelopmentofanemergingtechnology,theUnitedKingdomin1795•BramanJoseph（JosephBraman,1749-1814）,inLondonwaterasamediumtoformhydraulicpressusedinindustry,thebirthoftheworld'sfirsthydraulicpress.Mediaworkin1905willbereplacedbyoil-waterandfurtherimproved.

AftertheWorldWarI（1914-1918），becauseoftheextensiveapplicationofhydraulictransmission,especiallyafter1920,morerapiddevelopment.Hydrauliccomponentsinthelate19thcenturyabouttheearly20thcentury,20years,onlystartedtoentertheformalphaseofindustrialproduction.1925Vickers（F.Vikers）theinventionofthepressurebalancedvanepump,hydrauliccomponentsforthemodernindustrialorhydraulictransmissionofthegradualestablishmentofthefoundation.Theearly20thcenturyG•Constantimscofluctuationsoftheenergycarriedoutbypassingtheoreticalandpracticalresearch;in1910onthehydraulictransmission（hydrauliccoupling,hydraulictorqueconverter,etc.）contributions,sothatthesetwoareasofdevelopment.

TheSecondWorldWar（1941-1945）period,intheUnitedStates30%ofmachinetoolapplicationsinthehydraulictransmission.ItshouldbenotedthatthedevelopmentofhydraulictransmissioninJapanthanEuropeandtheUnitedStatesandothercountriesfornearly20yearslater.Beforeandafterin1955,therapiddevelopmentofJapan'shydraulicdrive,setupin1956,"HydraulicIndustry."Nearly20to30years,thedevelopmentofJapan'sfasthydraulictransmission,aworldleader.

Hydraulictransmission.Therearemanyoutstandingadvantages,itiswidelyused,suchasgeneralindustrialuseofplasticsprocessingmachinery,thepressureofmachinery,machinetools,etc.;operatingmachineryengineeringmachinery,constructionmachinery,agriculturalmachinery,automobiles,etc.;ironandsteelindu-strymetallurgicalmachinery,liftingequipment,suchasrolleradjustmentdevice;civilwaterprojectswithfloodcontrolanddamgatedevices,bedliftsinstallations,bridgesandothermanipulationofinstitutions;speedturbinepowerplantinstallations,nuclearpowerplants,etc.;shipfromthedeckheavymachinery（winch）,thebowdoors,bulkheadvalve,sternthruster,etc.;specialantennatechnologygiantwithcontroldevices,measurementbuoys,movementssuchasrotatingstage;military-industrialcontroldevicesusedinartillery,shipanti-rollingdevices,aircraftsimulation,aircraftretractablelandinggearandruddercontroldevicesandotherdevices.

Acompletehydraulicsystemconsistsoffiveparts,namely,powercomponents,theimplementationofcomponents,controlcomponents,auxiliarycomponentsandhydraulicoil.

Theroleofdynamiccomponentsoftheoriginalmotivefluidintomechanicalenergytothepressurethatthehydraulicsystemofpumps,itistopowertheentirehydraulicsystem.Thestructureoftheformofhydraulicpumpgearsaregenerallypump,vanepumpandpistonpump.

Implementationofcomponents（suchashydrauliccylindersandhydraulicmotors）whichisthepressureoftheliquidcanbeconvertedtomechanicalenergytodrivetheloadforastraightlinereciprocatingmovementorrotationalmovement.

Controlcomponents（thatis,thevarioushydraulicvalves）inthehydraulicsystemtocontrolandregulatethepressureofliquid,flowrateanddirection.Accordingtothedifferentcontrolfunctions,hydraulicpressurecontrolvalvecanbedividedintovalves,flowcontrolvalvesanddirectionalcontrolvalve.Pressurecontrolvalvesaredividedintobenefitsflowvalve（safetyvalve）,pressurereliefvalve,sequencevalve,pressurerelays,etc.;flowcontrolvalvesincludingthrottle,adjustingthevalves,flowdiversionvalvesets,etc.;directionalcontrolvalveincludesaone-wayvalve,one-wayfluidcontrolvalve,shuttlevalveandsoon.Underthecontrolofdifferentways,canbedividedintothehydraulicvalvecontrolswitchvalve,controlvalveandsetthevalueoftheratiocontrolvalve.

Auxiliarycomponents,includingfueltanks,oilfilters,tubingandpipejoints,seals,pressuregauge,oillevel,suchasoildollars.

Hydraulicoilinthehydraulicsystemistheworkoftheenergytransfermedium,thereareavarietyofmineraloil,emulsionoilhydraulicmoldingHopcategories.

Theroleofthehydraulicsystemistohelphumanitywork.Mainlybytheimplementationofcomponentstorotateorpressureintoareciprocatingmotion.

Hydraulicsystemandhydraulicpowercontrolsignaliscomposedoftwoparts,thesignalcontrolofsomepartsofthehydraulicpowerusedtodrivethecontrolvalvemovement.

Partofthehydraulicpowermeansthatthecircuitdiagramusedtoshowthedifferentfunctionsoftheinterrelationshipbetweencomponents.Containingthesourceofhydraulicpump,hydraulicmotorandauxiliarycomponents;hydrauliccontrolpartcontainsavarietyofcontrolvalves,usedtocontroltheflowofoil,pressureanddirection;operativeorhydrauliccylinderwithhydraulicmotors,accordingtotheactualrequirementsoftheirchoice.

Intheanalysisanddesignoftheactualtask,thegeneralblockdiagramshowstheactualoperationofequipment.Hollowarrowindicatesthesignalflow,whilethesolidarrowsthatenergyflow.

Basichydrauliccircuitoftheactionsequence-Controlcomponents（twofour-wayvalve）andthespringtoresetfortheimplementationofcomponents（double-actinghydrauliccylinder）,aswellastheextendingandretractingthereliefvalveopenedandclosed.Fortheimplementationofcomponentsandcontrolcomponents,presentationsarebasedonthecorrespondingcircuitdiagramsymbols,italsointroducedreadymadecircuitdiagramsymbols.

Workingprincipleofthesystem,youcanturnonallcircuitstocode.Ifthefirstimplementationofcomponentsnumbered0,thecontrolcomponentsassociatedwiththeidentifieris1.Outwiththeimplementationofcomponentscorrespondingtotheidentifierfortheevencomponents,thenretractingandimplementationofcomponentscorrespondingtotheidentifierfortheoddcomponents.Hydrauliccircuitcarriedoutnotonlytodealwithnumbers,butalsotodealwiththeactualdeviceID,inordertodetectsystemfailures.

DINISO1219-2standarddefinitionofthenumberofcomponentcomposition,whichincludesthefollowingfourparts:

deviceID,circuitID,componentIDandcomponentID.Theentiresystemifonlyonedevice,devicenumbermaybeomitted.

Practice,anotherwayistocodeallofthehydraulicsystemcomponentsfornumbersatthistime,componentsandcomponentcodeshouldbeconsistentwiththelistofnumbers.Thismethodisparticularlyapplicabletocomplexhydrauliccontrolsystem,eachcontrollooparethecorrespondingnumberwiththesystem

Withmechanicaltransmission,electricaltransmissioncomparedtothehydraulicdrivehasthefollowingadvantages:

（1）avarietyofhydrauliccomponents,caneasilyandflexiblytolayout.

（2）lightweight,smallsize,smallinertia,fastresponse.

（3）tofacilitatemanipulationofcontrol,enablingawiderangeofsteplessspeedregulation（speedrangeof2000:

1）.

（4）toachieveoverloadprotectionautomatically.

（5）thegeneraluseofmineraloilasaworkingmedium,therelativemotioncanbeself-lubricatingsurface,longservicelife;

（6）itiseasytoachievelinearmotion/

（7）itiseasytoachievetheautomationofmachines,whenthejointcontroloftheuseofelectro-hydraulic,notonlycanachieveahigherdegreeofprocessautomation,andremotecontrolcanbeachieved.

Theshortcomingsofthehydraulicsystem:

（1）asaresultoftheresistancetofluidflowandleakageofthelarger,soless

efficient.Ifnothandledproperly,leakageisnotonlycontaminatedsites,butalsomaycausefireandexplosion.

（2）vulnerableperformanceasaresultoftheimpactoftemperaturechange,it

wouldbeinappropriateinthehighorlowtemperatureconditions.

（3）themanufactureofprecisionhydrauliccomponentsrequireahigher,more

expensiveandhencetheprice.

（4）duetotheleakageofliquidmediumandthecompressibilityandcannotbe

strictlythetransmissionratio.

（5）hydraulictransmissionisnoteasytofindoutthereasonsforfailure;theuseandmaintenancerequirementsforahigherleveloftechnology.

Inthehydraulicsystemanditssystem,thesealingdevicetopreventleakageoftheworkofmediawithinandoutsidethedustandtheintrusionofforeignbodies.Sealsplayedtheroleofcomponents,namelyseals.Mediumwillresultinleakageofwaste,pollutionandenvironmentalmachineryandevengiverisetomalfunctioningmachineryandequipmentforpersonalaccident.Leakagewithinthehydraulicsystemwillcauseasharpdropinvolumetricefficiency,amountingtolessthantherequiredpressure,cannotevenwork.Micro-invasivesystemofdustparticles,cancauseorexacerbatefrictionhydrauliccomponentwear,andfurtherleadtoleakage.

Therefore,sealsandsealingdeviceisanimportanthydraulicequipmentcomponents.Thereliabilityofitsworkandlife,isameasureofthehydraulicsystemanimportantindicatorofgoodorbad.Inadditiontotheclosedspace,aretheuseofseals,sothattwoadjacentcouplingsurfaceofthegapbetweentheneedtocontroltheliquidcanbesealedfollowingthesmallestgap.Inthecontactseal,pressedintoself-seal-styleandself-styledself-tightseal（ie,sealedlips）two.

Thethreehydraulicsystemdiseases

（1）asaresultofheattransmissionmedium（hydraulicoil）intheflow