离合器毕业论文.docx

离合器毕业论文.docx

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离合器毕业论文

离合器毕业论文

Theclutchistheimportantassemblyofmanualvariablespeed,anditsgoodandbadrelationshipiswhetherthecarcanstartandchangesmoothly.Theclutchislocatedintheengineandgearboxbetweentheflywheelshell,withscrewwillbefixedintheclutchassemblyaftertheflywheelplane,istheinputshaftfromthegearboxoutputshaftofclutch.Intheprocessofthecar,thedrivercanuseontheorreleasetheclutchpedal,theengineandgearboxtemporaryseparationandjointgradually,tocutoffortransfertheenginetothetransmissioninputpower.Thispapermainlystudiesthecommonfailureofthedf-carclutch,andanalyzesandsolvesit.Ithasarealisticmeaningfortheuseandmaintenanceofcars.Thispaperintroducesthefunctionofdongfengautomobileclutch（makecarssmoothstart,interrupttodrive,function,structure,andbytheeastwindpower,cooperatetoshift,preventoverload）automobilerepairclutchasanexample,thetypicalanalysisofdongfengautomobileclutchfailure（clutchslippage,clutchisnotcomplete,difficultgear,clutchjointingshake,thesoundoftheclutch,clutch）noiseandvibrationcauses,solutions,maintenanceway,andhowtocorrectlyuse,mattersneedingattentionwhenusing,avoidfailureofclutch,prolongservicelife.Keywords:

clutch;Dongfengmotor;Faultanalysis;Theoryoffrictionplatemeshrecordthechapter1mio...1,1.1theclutchisintroduced...Thedevelopmentof1,1.2theclutch...Theoverviewoftheclutchinchapter2...32.1thefunctionoftheclutch...Thestructureoftheclutchofthedongfengcar...Thetypeofworkingprincipleoftheclutchandtherequirements...Thetypeofclutch...Howtheclutchworks...Thebasicrequirementsthatthefrictionclutchshouldmeet...Thecomparisonofthespringclutchwiththespringclutchofthespringclutch.Chapter3:

commonfailureanalysisandmaintenanceofthedongfengcarclutch...3.1clutchgliders...133.2clutchseparationnotcomplete,hanginginthedifficulty...143.2.1faultphenomenon...143.2.2troubleshooting...Whentheclutchjoinstheclutch...163.3.1faultphenomenon...1623.3.2rainfalldistributionon10-12reasonandrepair...163.4clutchsound...163.4.1trackmalfunctionphenomenon...Reasonsandprocessing...173.5clutchnoiseandvibration...183.5.1leadbearing（sleeve）damage...183.5.2separatebearingdamage...183.5.3separatebearings,gearboxfirstaxis,flywheel,clutchcoverdifferentheart...3.5.4flywheel-clutchassemblyisunbalanced...36clutchinspection...

...Thedismantlementanddecompositionofthe3.6.1clutchmaincylinder...Thedismantlinganddecompositionofthe3.6.2clutchworkingcylinder...3.6.3maincylinder,workingVATcheck...3.6.4clutchmaincylinder,workingcylinderassembly...Theairinthehydraulicsystemof203.6.5...Chapter4thecaseofthedongfengautomobileclutchmaintenancecase...Thecaseofclutchslidemaintenance...224.4.1faultsymptoms...224.1.2overhaulmethod...2234.2clutchmaintenancecases...232faultsymptoms...234.2.2testmethod...24"theory...25tothank......27references...Inthecourseoftherapiddevelopmentofthenationaleconomy,thevolumeofautomobileproductionincreasedyearbyyear,andby2011ithadreachedmorethan10millionvehicles.Chinahasmoreandmorecarsandmoreandmorecars.Especiallytherapiddevelopmentoftechnology,somenewtechnology,newmaterialwidelyusedinautomobile,toincreasecertaindifficultytoautomobilefailurediagnosisandelimination,clutchisanimportantassemblymanualtransmissioncaressential.Withoutaclutchmanual,thecarwillnotbeabletostart,anditwillbedifficulttoimplementthestoptransform.Inthecaruse,theclutchinevitablyappearssuch,suchafailure,directlyaffectsthenormaloperationofthecar.Nowthatcarsaremovingquicklyintohomesandcarsarebeingprivatized,carfailuresaregoingtoaffectusall.Itisofgreatandrealisticsignificancetoanalyzethephenomenonofclutchfailure,thecause,theremovalmethodoftheclutchfailureandthemaintenanceprocessoftheclutch.Thispaperfocusesonthediscussionofthefailureoftheseriesoftruckclutchindongfengseries,andthefaultofclutchiscorrectlyrecognized,andtheclutchisbetterusedandmaintained.1.1introducestheclutchislocatedintheengineandgearboxbetweentheflywheelshell,withscrewwillbefixedintheclutchassemblyaftertheflywheelplane,istheinputshaftfromthegearboxoutputshaftofclutch.Duringthecourseofthecar,thedrivercanstepdownorloosentheclutch.Theengineistemporarilyseparatedfromthegearboxandgraduallycoalescedinordertocutortransfertheengineinputtothetransmission.,inthecarclutchismanualandautomatedmechanicaltransmissioniselectronicallycontrolledshiftcartransmissionisanimportantassemblyof1,istomakesurethiscarcanstartandshiftamust-have1independentcomponents.Figure1-1of1.2clutchgeneralsituationofthedevelopmentTodaymorepiecesofthepioneerofplatetypeclutchuseddiscclutch,itisuntilafter1925.Themainadvantageofmulti-discclutchisthatwhenthecarstartstheclutchisrelativelysmoothandunimpactable.Bytheendofthe1920s,untilthe1930s,therewereonlyanumberofclutchesforcars,cars,andhigh-poweredcars.Manyyearsofpracticalexperienceandtechnicalimprovementtomakepeoplegraduallyinclinetoandpreferredmonolithicdryfrictionclutch,becauseithasaslaveunitmomentofinertiaofsmall,goodheatdissipation,simplestructure,convenientadjustment,theadvantagesofcompactsize,thoroughseparation,andtakeactiononthestructure,hasbeenabletodojointsmooth,sonowitiswidelyusedinlarge,mediumandsmallvariousmodels.

Nowthesingle-discdryfrictionclutchisquiteperfectinthedesignofthestructure.Thesmoothnessoftheclutchjointisimprovedbyusingamovingdiscwithaxialelasticity.Torsionalvibrationdamperareinstalledintheclutchplatenassemblyandtopreventthetransmissionoftorsionalresonances,reducedthetransmissionnoiseanddynamicload,withtheimprovementofpeopleofautomobilecomfortrequirements,theclutchhasbeenimproved,onthebasisoftheoriginalpassengercarincreasinglyusingtorsionaldamperwithdualmassflywheel,effectivelyreducingthenoiseofthetransmissionsystem.Chapter2,anoverviewofthefunctionoftheclutch2.1clutchinstalledbetweentheengineandtransmission,usedtoseparateorjointdynamiccontactbetweenbeforeandafter.Itsfunctionis:

first,preventthetransmissionlineoverload.Whenthevehicleduringemergencybraking,ifthereisnoclutch,theenginewillsharplyreducethespeedbyanddrivetrainrigidconnection,thusallmovingpartswillproduceverybiginertiamoment（itsnumericalcouldsignificantlymorethanthenormalworkoftheenginemaximumtorqueof）,onthebearingcapacityofthedrivetrainmorethanitsload,andmakethepartsdamaged.Withtheclutch,itcanbeeliminatedbytherelativemotionbetweentheactivepartoftheclutchandthemovingpart.Therefore,weneedtheclutchtolimitthemaximumtorqueandsafetyofthedrivingsystem.Second,interruptthedrivingforceandchangegears.Inthecourseofthecar,thedrivingsystemoftenneedstochangethegearforthechangingdrivingconditions.Realizetheshiftofthegeartransmission,general6gearorothershift,maketheoriginallaunchofagearpairwithgear,makeanothergeargearpairintothework.Mustbeforetheshiftontheclutchpedal,interruptpowertransmission,easytomaketheoriginalgearmeshingpairoff,atthesametimemakethespeedofnewgearmeshingpairmeshingareagraduallyinclinetosynchronization,soenterthemeshingimpactcanbegreatlyreduced,achieveasmoothshift.Third,makethecarstartsmoothly.Thisistheprimaryfunctionoftheclutch.Beforethecarstarts,itisnaturaltostarttheengine.Whenthecarstarts,thecaracceleratesfromacompletelystaticstate.Ifthedrivetrain（whichislinkedtothewholecar）andenginetocontactrigidity,hangupagear,transmission,carswillbesuddenlyrushedforward,butitdoesnotstart.Thisisbecausethecarhasalotofinertiawhenitcomestothefront,causingalotoftorquetotheengine.Undertheeffectoftheinertiatorque,theenginespeedintransienttimefellsharplytotheloweststablespeed（generallybelow300-500RPM）,theengineisshutdownandcannotwork,carcan'tstart,ofcourse.Therefore,weneedthehelpoftheclutch.Beforethestartaftertheenginestarting,thecar,thedriverontheclutchpedal,clutch,maketheengineandtransmissionsystemoff,thenhanguptransmissiongear,thengraduallytheclutchpedal,clutchjointgradually.Stuckintheprocessofjoint,theenginetorqueincreasesgradually,therefore,shouldbegraduallyontheacceleratingpedalatthesametime,thegradualincreaseofenginefuelsupply,therotatingspeedoftheenginekeepon4minimumstabilityspeed,withoutstalling.Atthesametime,duetotheclutchjointclosedegreeincreasesgradually,theenginebytransmissiontodrivethewheeltorquewillincreasegradually,thetractionenoughtoovercometheinitialresistance,thecarisstartingfromthestaticmovementandgraduallyacceleratedguaranteeingthetransmissionshiftworkflat2.2.2thestructureofdongfengautomobileclutchAneastwindcaristoadoptthehydrauliccontrolsystem,ratherthanusingthecabletype,nowmostofthelargecaradoptshydrauliccontrolsystemhasasmallfrictionresistance,convenientarrangementandcombinationofsoft,andcantransfertheenginemaximumtorque,inthelong-ter