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外文翻译--自卸车举升系统设计浅谈.doc

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外文翻译--自卸车举升系统设计浅谈.doc

附录附录A英文原文ABriefDescriptionofLiftTruckSystemDesignMartinW.CrouseAbstractInthispaper,dumptruckthroughabriefdesignanalysis,inviewofthelengthofthelargerfeaturesofheavydutydumptruck,liftingthesystemfromnodeStructuredesignandhydraulicdesignofthecorrespondingmeasuresfortheliftingofheavytruckdesignacertainguidingfunction.Keywordsheavydutyliftingsystem1.ThemainstructureofdumptruckDumptruck,includingthestructureofthemainliftsystem,chassis,frame,vice,componentcompartments,2.liftingbodydesignandanalysisHeavydutydumptruckliftingsysteminthedesignprocessofthemainissuesthatneedtobeaddressedincludeliftingformsofselection,intheliftcarintheprocessofstability,beforeandafterthebridge,thereasonablenessofaxleloaddistributionandhydraulicsystemreliability.Chassisbyfollowingthedesignof7.2metersonconcreteexamplesofthedumptruck,dumptruckliftingmechanismonthegeneralideaofsystemdesign.2.1CompartmentvolumetodetermineinitialChassisinaccordancewiththeparametersWheelbase3900mm1350mm,rearoverhang900mm,setthequalityof17500kg,andthewhole1600mmrearoverhangfortherequesttodeterminecarsize5600mm2300mm1500mm.Determinetheinitialcarpositioninthechassisforthecarbackoutofthebackendchassisframe870mm.Indeterminingtheformoflifting,theneedforfurtheranalysisofCountbeforeandafterthebridgeandaxleloaddistributionofthecartoverifythelocationofthevehicleinthesecondcategoryisreasonable.2.2determinetheformofliftingLifttruckusedmainlyintheformofFtype,Tstyle,frontstraighttopform.InFtype,Tstyle,frontstraighttopthreeidentifiedintheformofliftingoneofthemostsuitable,weneedthreeconditionsontheanalysisofcalibration.Lifttheformofthethreehasitsownadvantagesanddisadvantagesofprestraighttopcompactstructure,liftingandhighefficiency.Simpleprocesswithlowcosts.However,afterliftingthestabilityofpoorroadconditionsonthehigherFtypeandTtypeliftingmechanismagooddegreeofcrosscuttingsteel,smoothliftingsmoothrotation,thefueltankoftheworkpistonshorttrip,buttheliftcoefficientthantheGreat.Inordertodeterminewhetherthechoiceofwhatkindofliftingthemostappropriateform,theauthorofthreecasesweredoneonthetheoreticalanalysis.IftheselectedFtypeandTtypeliftingform,themostimportantofitscalculatedliftcoefficientcomparison.BycalculatingtheFtypeformsofliftingliftingthesmallestcoefficientis1.751,Ttypeliftingthesmallestformofliftforcecoefficientis1.799,itisnotidealusuallyliftcoefficientof1.6to1.7whentheeffectofbetter.ThefrontstraighttopedgeliftingthefueltankTisgreaterthan8tonsofit.TakingintoaccounttheuseofFtypeorTtypeliftingmechanism,veryeasylifting,liftingtheneedforlargetanks,butalsotothetriangulararm,suchasdemandinganddifficulttoachieve.Combinationoftheforegoinganalysis,decidedtoadopttheprefixformofstraightLifttop.Liftingmeasurestoimprovethestabilityof2.3Duetothedesignofthelengthofthelargercar,atthesametime,theuseofprestraightliftingtopform,sothestabilityofcarisveryimportant,needtotakemeasurestoimprovetheprocessofliftingcarriagevehiclestability,preventtheoccurrenceofvehiclerollover.DumpTruckcarnormallyusedtoconnectthedesignofhingeaxisandsubframeconnection,theDeputyframethroughtheUboltsandconnectthemainframestructure.Thedesignwehaveadoptedanewstructure,flatsteel,throughweldingatthesideoffixedwithboltsonthemainframe,thusgreatlyreducingthevehiclescenterofgravitytoincreasestability.AsthecarthroughthehingeaxisandthehingeaxistoachievetheliftingBlockrotation,hingeaxisblocksnowhaveahighdegreeofflatsteeltoreplacetheVicetrailerswillneedtoinstallseathingeaxisframeinthemainbeamonthewingsurfacebelowthemainFramebackendneedtoinstallaZshapedbeamstosupportBlockafterthehingeaxis,Zshapedbeamthroughtheboltassemblybackendfixedintheframe,whilethetwoaxishingeasmuchaspossiblethedistancebetweenblockstoincreasetoincreasethecarexampleorstability.Duetothelengthofthelargercar,thedesignwouldhavetoconsiderthestabilityofdevicesusedtoincreasevehiclestability,thestabilityofthecentralunitinstalledontheinsideofthelocationoftheformerside.Carsafetydesignintheframearoundpolebetweenthelongeron,theformofsimple,safe,reliable,easytooperate.Aftertakingintoaccounttheliftingcarriage,BlockDepartmenthingeaxisforceisverylarge,andthereforehingeaxisintheBlockOffice,tostrengthenmeasurestobeadoptedtoincreasethehingeaxisofthesupportseatedge.3.HydraulicLiftSystemDesignPrestraighttopstyle,includingthedumpingofhydraulicgearpumps,hydrauliccylinder,controlvalvelift,valvelift,hydraulictanks,piping,liftingmechanism.Hydraulicsystemweuseanadvancedthreeloopsystem.Hydrauliccontrolsystemschematics,.Thedumptruckinthethreeloopsystem,theoilwillflowtothefueltankthroughthevalveassemblytoreturntotheonlycircuitintheoilreturntotank,thepumpwillhelptoguidethevalvethroughaseparateoilcircuitonlybeusedasareturncircuit,becauseinmostexcellentcircuitdesign,thereturnwillbeinstalledincircuitcapacity100gpmusefilterstofilterthedirttoenterthepumptoextendtheuseofpumppartslife.Threeloopsystem,themainadvantagesaretoensurethatcleanoilwillalwayssupplypumps,andnotwhenthedumptruckinthepositionortomaintainonlytherelianceontheoilpumpintheinternalvolumerotation.3.1ThemaincomponentstochooseHydraulicsystemismainlyusedhiwasseesystems,hydrauliccylinderhiwasseeselectedmultilevelcylindersleeve.3.2hydrauliccylinderinstallationtodeterminethelocationTheinstallationofhydrauliccylinderstraighttopcarandthedriversrequestthereisenoughroombetweenthathavingstudiedthearrangementofsecondclasschassis,thecabbehindtheneedtomovethelocationofmuffler.TheabolitionoftheViceframe,hydraulicoiltanksneedtoinstallabeaminthemainframebetweenthetwo,usingtheholeonthemainframe,thedesignoftheinstallationofahydrauliccylinderassemblyseat.Blockwithboltsinstalledinthemainframeaboutafixedbeam,thehydrauliccylindersupportshaftandtheninstalledintheinstallationofseat,hydrauliccylinderbracketsbeforetheboardinthecar.4.ConcludingremarksThesearethelifttrucksystemdesignprocess,themainfeaturesofthedesignisthelengthofthevehicleusedinlargedumptruckfrontstraighttopliftingbody,thehydraulicsystemforthethreeloopsystem,theuseofpumpvalveallinonestructure,workingprincipleofsimpleandnovelstructureAtthesametime,throughtheintroductionofnewstructurestosolvetheprocessofliftingthecarstability.Throughmorethanaspecificmodeloftheliftingsystemofthedesignprocess,thelifttruckcanalsoreflectthegeneraldesignofthesystem.

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