外文翻译--关于大型绞车制动系统最佳设计方面的研究.doc

英文原文Winchbrakesystemonlarge-scaledesignofthebestRedPhosphorusTechnicalInstituteoftheChineseRedPhosphorusMuroranInstituteofTechnologyMuroranJapanHitachiMachineryMotorcyclelaboratoryTsugaruStraitJapanAbstractInordertoadaptlikethetowermoldingmachine,makesthewinchasfaraspossiblesmallandlightisveryimportant.Therefore,thisarticlereportedbrakingsystemsoptimumdesign.Becauseofbrakingsystemsprecisecontrollabilityandsoon,thedispositionbrakingsystemscanimprovethesystemsoperationthesecurity.Theauthorstudiedonekindtoinstallonthe1000kwwinchbrakediscspliersdiscbrake,thiskindofwinchhadthe10m/sfluctuationspeed.Preface:Inordertodoasmuchaspossibletowinchthesmallandlightisveryimportant.Inthisareaofahoistareusuallyequippedwithdiscbrakes.However,inordertoachievethisobjectivebytryingtoimprovethebrakingsystem,particularlytheimprovedallocationofabrakewinchsafetyoftheoperation.Winchisconnectedwithatraditionalbrakediscbrakes.Spring-frictionwiththepressureinthebrakedisc,andpressureonthesizeofthedeviceinstalledinthebrakingpressureonthehydrauliccylindercontrol.Ifanyoilhydrauliccylindersealsbroken,thefilmwillbeexposedtothefrictioninthemist.Thiswillresultinadangerousresults-reducethepressureonthebrake.Toavoidthispotentialdanger,theauthorofthestudyindicativeofanewtypeofbrake,peoplefromthemaintainabilityoftheviewtostudythisnewtypeofbrakeagencies.Asbrakeinstitutionsshouldalsobeverysmall,20MPAisconsideredtheworkpressure.Inordertofindthebestsystemforustostudythecharacteristicsofsystemdynamics.BrakingSystemWetakeatypicalwinch(1000kw)asastudyexample.Therearetwobrakediscandfourgroupsofinstitutionstargetedinthebrakedisc.Themaximumtorqueiswhentheemergenciesoccurs,isalsowhenthemaximumbrakingtorqueneedstodrop,themaximumbrakingtorqueexpressestheequality12111)(*)21()(*)22(DppddvDMDITtVwb(1)IntheformulawI=revolvingcomponentsmomentofinertia(2kgm)VM=componentsquality(kg)1D=winchspooldiameter(m)v=velocityofwhirl(sm/)1p=whenloadingropespullingforce(n)2p=whenunloadingropespullingforce(n)Inthiscase,whenwinchspoweris1000speedsis100,theequilibriumvalueisnot100,therefore,biggestbrakingtorque=250hasthefollowingresearchinstitutetodecide.PliersdiscbrakeThedemonstrationsuchnewstylebrakingsystemhasapairofclamp.Theclampclampsthebrakediscwiththebrakepad.Aonhydrauliccylinderusesforlocatedatsidethebrakepadoppositiontocontrolinstallsintheabovespringpressure.Wheneightbrakingmechanismssimultaneouslyaffectonwinchstime,equatesaffectsa32knmbrakingtorquewhichinthebrakepadcenter29knproduces,iffrictioncoefficient=0.4.Canseetwopairofpliersplatesseparatelybythepinsealinandthefeatherpieceisfixedtogetheronthewinch.Tenhelicalspringsplaceinthetogetherspringassemblycanexert24knthestrength.Thestrengthcanthroughestablishadjustsintheabovescrewrod,inordertoonmanykindsofspecificationwinchsbrakingsystemasfaraspossiblewidespreadapplication.Throughcontrolshydrauliccylindersflowingtubingheadpressureasapriminghydrauliccylindertocontrolthebrakingtorque.Becausebrakingtorqueshysteresis(isoppositeincontrolsignal)isbecauserubscauses,Thereforeprimingbyveryprecisedesignsothateliminatespistonsresistance.Theelastomermaterialisplacedtogetherbetweeneachbrakepadandthepliersplate,thegoalisobtainsthesamecontactforce.Agroupofpliersplatebrakeisplacednearbybrakediscstwo.Theirrelationscanlook.Lookslikesuchwhichinthechartdemonstratedthatisloadedwiththenewstylepliersplatebrakeandthewinchhastheverygoodunion.ControlsystemThebrakingmechanismadjustsunderthesafepremise,withtheaimofusingfullyfromhydrauliccylinderspressureoilappliesthebrake.Twobrakevalveconnectsonthehydrauliccylinder；Oneisasafetyvalve,onetreadonsthevalve.Becauseintheworldwidescalemustincreasetheworkload,winchspowerandthewinchmovementsspeedisgettingquickerandquicker.Underthiskindofenvironment,tomaintainwinchssecurity,brakingmechanismscharacteristicshouldimprove.Wehadalreadystudiedcontrolsystemsdynamics.ControlsystemsdynamicsimulationTheinputsignalgivesthemagnetcoilcontrollingspringimpelsthepressurecontrolvalvebythis(servicebrake)pressureF1.ValvesoutputP2anddrivinginfluenceF1isbecomestheproportionunderthesteadystate,achievesthesteadystatethroughnegativefeedbackP2andthepressureF1inverseproportionrelations.Onewiththenegativefeedbackconnectionsaccumulator,itsroleisusesfortoremove,becausetheoilpressuresleepsvalvesmisalignmentquantitywhichthenaturecauses.Simultaneouslythissystemalsohasaphaseangleofadvance.Therelatedequationisasfollows:incircuitdiagramstrengthequation,0)(211101111pAkxxxxm(2)InductsthefeedbackroompressureP2)/exp(1112Ttpp(3)TriestohittheT1=time-constant,pressurizeP2,butneedscurrentcapacityQ121QQQS21111/)(2ppxdcs(4)TriestohittheC=leakagecoefficient,=fluiddensity,inflowprimingcurrentcapacity11/)(RppQaSabpaaaaapKKAKxAV)/(/)(2（5）TriesthemediumoilcoefficientofvolumeKatohavepressurePatocause,R1istheelasticitycoefficient,flowstofeedbackroomcurrentcapacityQ2212/)(RppQa（6）Aboutprimingstrengthequation0)()(00apbabbaaaaaaxkFxkFpAxxm（7）Moreoverinhere,impelsthebrakepadstrengthFbis,abbbxkFF0（8）Infact,qualityMaandthedisplacementmeasureXatobesmall,mayneglectintheequality7inertiaandtheviscousfrictionintheactualsystem.Asaresultofthisreason,theinstructionbrakingtorqueTbresponsewhichpressurePaitselfcanbeapproximate.Wesimultaneouslyaretryingwithmathematicsmethodsolutionequationset(2)-(8),hasthe32Knmbrakingtorquetwobrakesbyeachtotakeagroup.Inviewofappliesinthebrakesituationroutinecalculationresult,wheninputsignalinsteppedchanges,pressurePafasttoinstallationvaluechange.Onoursexperience,brakescontrolsystemhascertainlyabestresponse-fastresponsenottocausetheharmfulvibration.Thebestresponsewasconsideredthatshouldbeforeapplyingthebraketheconstant,thebestvalueis0.3second.(1)Isrevolvingtheconstant0.3changecurvearoundsome,theresidehasnotradiatedhasnotbeenabletocausetheobvioustimelagwhichthesystemstabilitygoesbad.Compareswiththecomputationresult,hasotheronenottoaffecttheresult.Itistheobviousaccumulator,notonlythetimelagwasquiteshortmoreoverthecurvecharacteristicalsotoobtaintheimprovement.ConsiderationThisdiscbrakeneedsaflexiblematerialtoobtainthesamebrakepadcontactpressure.Usually,thebrakepadmustexposeinthebrakeprocessinthehightemperatureair.Asaresultofthisreason,usesinthiskindofsituationflexiblematerial,musthavethestrictlimit.ConclusionHasanalyzedthediscbrakeanditscontrolsysteminhereus,theseanalysisresultissummarizedforbelow:a(1)winchstopassemblysmethod；Thediscbrakewasalreadyincludedtheplan.Thiskindofoptimumdesignandthemachinematchareverygood,althoughthebrakehadalreadyacceptedspringthistype,simultaneouslyitscompatibilityalsoobtainedtheconsideration.(2)throughcontrolsthebrakepadusingtheflexiblematerialthecontactpressure,causesthecontactpressuretheassignmentisthesame,buttheflexiblematerialschoiceneedsthecarevery.the(3)brakingforcessizehasthefunctiononpistonsflowingtubingheadpressuretodecidethatthebrakingforceandthespringstrengthareopposite.Theaccumulatorandbrakevalvesnegativefeedbackconnectsintogether,affectsthebrakethestability.ThanksTheauthorhoped(theMurorani.tstudent)gentlemanexpressessincerethankstoM.Kodo,M.Kodointheseresearchperiodhasgiventheverybighelp.中文译文关于大型绞车制动系统