外文1HydraulicSystemforPre-presserAbstractThepaperintroducesthecomposition,operationprincipleandfeaturesofthepro-pressershydraulicsystem,andalsothemaintenanceofthesystemindetail.Keywordshydraulicsystem,maintenanceofhydraulicsystemAtpresent,high-pressurehydraulictechnologyinachievingtheflowandhighefficiency,durabilityandahighdegreeofintegration,andotherrequirementshavemadesignificantprogress,isincreasinglyshowtheirvitality.Tobaccoindustryintheapplicationareverywide.1.Packingahydraulictransmissionunitandthecompositionoftheworkingprinciple1.1packingprinciplehydraulictransmissionunitPre-pressurehydraulicsystemisthecoreofthepackageunit,hydraulicsystem,theECwillhaveadirectimpactonsurchargingpackingunitperformance.Twoofthehydraulicpress-hydraulicsystem(Figure1)fromthemainhydraulicPumpingStation,hydraulicpipelinesystemsandcomponents,suchasfueltanks,hydraulicpumpstationandfromfueltanks,hydraulicpumpgroup,controlvalveblock,filtercoolingsystemcomponents,pre-pressurefueltanksandtoupgradethefueltankmovementsrelyingonliquidpressuretoachieve.whenthefueltanksdonotwork,theoilpumppressurereliefvalvecanbeelectromagneticorreversingvalvefunctiontothemedianunloading.electromagnetwhenDT15(or16DT)forelectricity,No.64.1(or64.2)hydrauliccontrolvalveopened,thefueltankcouldsurchargingformeddifferentialcircuit,thewhereaboutsoffreedomfastdownlinkcapabilities,inafreewhereaboutsstageliquid-filledtankfilledthroughthevalve(68.1orserialnumber68.2)tothemastercylinderonthecavityquicklyaddoil.surchargingamulti-pumpfueltankswereunloadingoilandtheformofpre-pressurefueltankstoachieverapid,slowspeed,andotherrequirementsoftheone-wayexpenditurethefueltankvalveadjustablespeedbufferorspeed,thecoolingsystemcanstrictlycontroltheoiltemperature,sophisticatedfiltersystemcanimprovethecleanlinessofhydraulicoil,whichareguaranteedhydraulicsystemisreliableandeffectivemeasures.belowtothe1stsurchargingMachineasanexampletoillustrate:Startpumpmotor,theoil-absorbingoilbytheOilFilter19.1,20.1closingvalves,joints21.1avoidvibration,22.1pumps,theone-wayvalve34.1,36.1one-wayvalve,71high-pressurehose,72high-pressurehose,46thereturnofelectromagneticreliefvalvetank.whenthefueltanksonthetriponthe1st,at46reliefvalveelectromagnetintheelectromagneticpower,62.1inthetwofour-wayreversingvalveelectromagneticpower,tocontroloilby73high-pressurehose,high-pressure79Hose,48valvehydraulicvalveto68.1,68.1hydromechanicalvalveisopened,hydraulicoil,asoil-absorbingOilFilter19.1,20.1closingvalves,joints21.1avoidvibration,22.1pumps,theone-wayvalve34.1,36.1valve,71high-pressurehose,72high-pressurehose,73high-pressurehose,aone-wayvalveplate58.1,59.1-throttleone-way,one-way60.1-throttleintothecavityunderthefueltank,thefueltankcavityOil68.1hydromechanicalvalvetothetankfilled,increasedfueltanksatthistime,whenonthestrokeattheendof46reliefvalveelectromagneticpower,62.12StoneSOLENOIDVALVEpower,hydraulicoilby46electromagneticoverflowthereturnvalvetank.Pistonsdownwhenoiltanks,fueltanksoftherequirementsoftheoilpressurethanpistontobaccoreactedlessfueltanksDetroitPistonsbarsandtheweightofthefueltankdownlinkthereforecanbedividedintofourstages:thefirstonePressurestageistheinitialstageofthefirstdownlink,andthenbecauseofpressurehead,rod,rod-oriented,suchasgreaterweight,andmechanicalandelectricalequipmenttostart-tripairisnottheresistancetotobacco,tobaccopressureheadstartcontactssincethenTobaccoisveryloosely,andsmallresistance,therebypressureheadcompletelyonthemselvesunderpressure,pre-cavitypressureonthefueltankofavacuum.whereaboutsofthisstagethatfreestage.liquid-fueltankattheatmosphericpressureintheroleofoilthrough68.1onthefueltankintothecavity,66.1electromagneticballvalvesfortwotothreelinkswillbe64.1cartridgevalveisopened,theinferiorvenacavathroughthedifferentialoiltothefueltankcavity,thepumpprovidedbytheoilpressurereliefvalvethroughtheelectromagnetic46inthefueltanks,enteredthesuperiorvenacava.Thesecondphase,duetobreathingcompressedtablets,thefirstdownwardpressuregrowingresistance,thisresistancewhenpressureisgreaterthanthefirst,andthentheweightofthepistonrod,thecavitypressuretothefueltankpressure,thepressureatthistimefirstontheoilpressuretopushthePistonstodownlink.filledat68.1valveclosedcavityundertheoildifferentialprogressivecavitytoreturn,thepumpprovidedbytheoilpressurereliefvalveintheelectromagneticthrough46,tocontinueintothecavityonthefueltank,Asthispressureless-pressurehydraulicpumpstationtothefueltanktoprovidethemaximumflowofhydraulicoilunderpressurerelativelyfastpace,sothisstage,knownasrapidpressurestage.Thethirdstage,whenthesmoke-compressedtoacertainextent,thegradualincreaseinpressure,thenusingaslowerspeed,andpressedthisstage,knownasSlowstage.Cavityundertheoilatthistimedifferentialprogressivecavitytoreturn,thepumpprovidedbytheoilpressurereliefvalveintheelectromagneticthrough46,tocontinueintothecavityonthefueltank,thereliefvalve35.1,35.2ofelectromagneticpower,willpump2,thepressureoftheoilpump4tounloadingtank.Thefourthstage,whenpressureheadpressuretotherequiredsize,thepressureheadtostayforaperiodoftimeinordertopreventexcessivesmoke-reboundthisphaseknownasthepackingstage.Atall,thesolenoidvalveinthepower,allPumppressureunloadingoiltothefueltank.Thisisthemainfueltankofthebasiccourseofaction.Canbeseenfromthecasesofhydraulictransmissioncharacteristics:(1)Pre-Pressthemainfueltanksuseddifferentialcircuitandliquid-fueltankintheformofdownwardpressureheadmakesfastworkofsmooth,supportingashorttime,thehighefficiencyandreducedenergyconsumption.(2)hydraulicsystemuseshydraulicoilcoolingdeviceinstalledHydraulicOilandfiltersystemssothattheworkofhighreliabilityequipment.(3)designofthefueltankandhydraulicoilcoolerelectricheatingsystemmakesthismachinehasawiderangeofadaptability.(4)amulti-gradeoilunloadingpumpmodel,thefueltanktoachievethevariouspistonspeed.(5)TheownerCircuitplateusingsoftswitchingmodes,reducingtheimpactofthehydraulicandhydraulicvibration.1.2packingunithydraulicsystemhydrauliccomponentsHydraulicpackingunitfromthehydraulicsystemhydraulicpumpstationsandhydraulicpiping外文3systemcomponents,hydraulicpumpstationandfromfueltanks,hydraulicpumpgroup,controlvalveblock,filtercoolingsystemcomponents.1.2.1FuelTankArectangulartankstructure,theeffectivevolumeofabout3.5m3aroundontheroofinstalledwithairfilter,airfilterUnscrewthetopofthetankisrefueledmouth.Onthesideofthetankwasopenedholesfortheworkerstoentercleaningtank.alsoinstalledatankwiththesurfacetemperatureshowdisplays,thetwoelectricalcontactsandathermometerliquidlevelcontroller.RangeOilFilterinstalledintheboxonthewall,thedischargeofoil-absorbingfilterremovedwillbecoveredOilFilterCore.filterinsideisaone-wayvalve,filterout,theone-wayvalvewillbeclosedquicklyOilFilter,inthecircumstancesbuildsitsoilfilterwillnotremoveoilspills.1.2.2PumpUnitThehydraulicsystemusestwopumps,eachpumpingsystemsfromamotordrivenadouble-vanepump,surchargingthelargestsupplyofthefueltankto342.3l/min,feedbinenhancethesupplyofcylinderto70.3l/minhydraulicsystemusestheflangeofthevalve,pressurereliefvalve,electromagneticReliefValve,theorderofone-wayvalvesandvalvesetswereinstalledinthepumpoutoilatthesite,thedesignofthisstructuretoamorecompacthydraulicpumpstation.1.2.3upgradecontrolofthefueltankvalveblockThevalveblockwiththetwofirsttwoelectro-hydraulicdirectionalcontrolvalveandthesuperpositionoftwoone-waythrottle,fueltanksinstalledinthepumpingstation,thecontrolofgroupactivitiesexpectedmeraisefueltankmovementsandsuperpositionofone-wayexpectedmethrottlecontrolrateofdecline.1.2.4ofthecoolingsystemofhydraulicfiltrationsystemusesanindependentcoolingsystemfiltersfromthevanepump,safety,finefilters,coolersandsoon.Thisvanepumpform.coolertheflowof82.8L/min,finefilterfilteringaccuracyof10coolinganareaof7.0m2,withthecirculatingwatercoolingofthesystemcanimprovethecleanlinessofoil,butalsotoensurethefullloadofoiltemperatureofnotmorethan50.2hydraulicsystemmaintenance2.1SummaryPracticeshowsthatthehydraulicoilcontaminationofhydraulicsystemfailureisthemainreason,ithasseriouslyaffectedthereliabilityofthehydraulicsystemcomponentsandthelife.Duetohydraulicoilpollution,theactuallifeofhydrauliccomponentsoftenmuchlowerthanthedesignlife.thereforetheproperuseofhydrauliccomponents,management,aswellaspollutioncontrol,istoimprovesystemreliabilityandextendtheservicelifeofimportantcomponentsmeans.2.2pollutantsandthetypesofhazardsHydraulicSystemofpollutants,isincludedinthesolidparticlesintheoil,water,air,chemicals,micro-organismsandpollutionenergy,anddebris.Hydraulicoilpollution,andthecomponentsofthesystemhavethefollowingadverseeffects:(1)solidparticlesacceleratedcomponentwear,andplugthegapOilFilter,pump,valveperformancedecreasenoise.(2)waterimmersionacceleratetheoxidationofoilandadditivesplayaroleandhaveaviscousresin,filterplugging.(3)airmixedwiththevolumeofoillowermodulusofelasticity,causecavitation,loweroillubrication.(4)solvents,surfactants,suchaschemicalcompoundstometalcorrosion.(5)thegenerationthatmicrobialoildegenerate,reducinglubricationperformance,acceleratedcorrosioncomponents.Highwater-basedhydraulicoilofthemoredangerous.Addition,theimproperheat,electrostaticenergy,magneticfieldandradiationcanoftenOilisconsideredthepollution,theyhavetooiltemperatureexceedsthelimit,resultinginoildegeneration,whileothersareincurredfire.2.3pollutioncauses(1)NewOilPollution:Peoplebelievethatthepurchaseofanewhydraulicoilmustbeclean.Fact,thisunderstandingisnotcorrect,therearealsonewoilpollution,suchascontainersQicengandcoating,oilinghoserubberanddustintheatmosphere,andsolikelytobeoil.(2)thenewsystemofpollution:hydraulicsystemanditscomponentsinthemanufacture,assembly,storageandhandlingprocess,thesand,chip,abrasives,weldingslag,dustandrust-suchasworkinginthehydraulicsystemhasnotyetenteredthesystembefore.(3)theuseofthehydraulicsystemintheprocess,throughthereciprocatingmotionofthepistonrod,theoilinjectionsystem,theflowofairinthefueltank,thatmayorcondensationdroplets,thereturnofthefueltankleakageandotherpollutantsthatenterthesystem.(4)Hydraulicsysteminthecourseoftheirworkandcontinuetoproducemetalsealthewearparticles,particlefiltermateriallossorfiber,suchaspeelingpaintdebris.(5)Maintenancebroughtintotheprocess,suchasdustandVelveteen.(6)Oildegenerateafterachemicalreaction,sothatmetalcorrosion,Emergingparticles,rustfilmtoensureoilpollution.2.4Oilpollutionstandardsandtestmethods2.4.1pollutionOilpollutionandwhetheritcancontinuetouse,theremustbeastandardtestmethods.Regularontheinternationa