5000字翻译.docx

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5000字翻译

DesignandAnalysisoftheGeminiChainSysteminDualClutch

TransmissionofAutomobile

Abstract

Chaindrivesystemiswidelyusedintheconditionsofhigh-speed,overload,variablespeedandload.Manystudiesarefocusedonthemeshingtheoryandwearcharacteristicsofchain

drivesystem,butsystemdesign,analysis,andnoisecharacteristicsofthechaindrivesystemareweak.SystemdesignandnoisecharacteristicarestudiedforanewtypeGeminichainofdual-clutchautomatictransmission.Basedonthemeshingtheoryofsilentchain,thedesignparametersoftheGeminichainsystemarecalculatedandthemathematicalmodelsanddynamicanalysismodelsoftheGeminichainsystemareestablished.DynamiccharacteristicsoftheGeminichainsystemissimulatedandthecontactforceofplateandpin,plateandsprockets,thechaintensionforces,thetransmissionerrorandthestressofplatesandpinsareanalyzed.AccordingtothesimulationresultsoftheGeminichainsystem,thenoiseexperimentaboutsystemiscarriedout.Thenoisevaluesaretestedatdifferentspeedandloadandspectralcharacteristicsareanalyzed.Theresultsofsimulationandexperimentalshowthatthecontactforcesofplateandpin,plateandsprockets

aresmallerthantheallowablestressvalues,thechaintensionforceislessthanultimatetensionandtransmissionerrorislimitedin1.2%.Thenoisevaluescanmeettherequirementsofindustrialdesign,anditisprovedthatthedesignandanalysis

methodoftheGeminichainsystemisscientificandfeasible.

Thedesignandtestsystemisbuiltfromanalysistotestof

Geminichainsystem.Thisresearchpresentedwillprovidea

correspondingtheoreticalguidaneeforthedesignanddynamiccharacteristicsandnoisecharacteristicsofchaindrivesystem.

Keywords:

Geminichain,systemdesign,noisecharacteristic,dynamiccharacteristic,transmissionerror.

1Introduction

Transmissionsystemisthecorecomponentoftheautomotivepowertrain.Itsexcellentperformaneeandperfection,playdecisiverolesintheautomobilepowerperformanee,economy,comfortableandreliability.Dualclutchtransmission（DCT）cantransmitpowerwithoutinterruption.Thustheshifttimeisshortenedandtheshiftqualityiseffectivelyimproved.DCThasinheritedmanyadvantagesofthemanualtransmission,suchashightransmissionefficiency,compactinstallationspace,lightweight,lowcostetc.Soitisthedevelopmentdirectionintheautomatictransmissionindustry.

DCTavailableinautomotivetechnologyisshowninFig.1.Theroundpinsilentchaintransmissionsystemisappliedinthechaintransmissionsystemstudiedinthispaper.Uptonow,manyscholarshavedonealotofresearchinrelatedareas.Basedonthemeshingtheoryofsilentchainandsprocket,MENGFanzhong,etal[1-4],presentedamethodwhichcan

calculatetheparametersofplateandsprocket.Themeshingdesignsystemofchainplate-sprocket-hobwhenplateandsprocketismeshingwasstudiedinthosepapers.Andthemultivariatevariationcharacteristicofsilentchainplateandsprocketisexpounded.Basedonthesilentchainsimulationmodels,FENGZengming,etal[5-6],researchedthemeshingcharacteristicofchaindrivesystembyanalyzingthecontactforceandstressofplateandpinindifferentmeshingperiod.Basedontheabrasiontestofchaindrivesystem,CHENGYabing,etal[7-9],studiedtheabrasionpositionsurfacemorphologyofplate,sprocketandpin.Thetransversefluctuationsofaxialmovingofsilentchainusingmulti-bodydynamicswereanalyzedbyZHANGWM,etal[10].Thewearcharacteristicsof

automotivechaindrivesystemfromthemicroscopicviewandanalyzedtheforcecharacteristicsofchainplateandpinattheNano-levelwasstudiedbyLIBaolin,etal[11].MicrostructureandperformanceofcontactsurfacesofthetoothchainplateafterquenchinginthemicroscopewasresearchedbyFUZhenming,etal[12].DynamicresponseofthechaintransmissionsystemincompositeandalternatingconditionswasstudiedbyXULixin,etal[13].BasedonthemeshingmechanismofchainplateandsprocketwithinvolutetoothproposedbyXUEYunna,etal[14-15],WANGYong,etal[16],

analyzedthemodificationcoefficientofsprocketwhilethechainplateandsprocketmeshing.Theyhaveachievedthechangerulesofdifferenttoothprofilefromthemodificationcoefficientchanges.Newdoublepitchrocker-pinsilentchainforconveyorsandsprockettoothprofilewerestudiedbyWANGWencheng,etal[17],SUNWei,etal[18],theyproposedanewtypeofdoublepitchrocker-pinsilentconveyorchainandstudiedsprockettoothprofileandinvolutesprockettoothprofileforeffectsondynamictensionofchainsinthesilentchaindrive.

Kcvurscaciir4〔hgear\2ndgcar^nn.rln

Fig.1.SchematicofDCTtransmissionsystem

Manyotherfamousscholarshaveconductedin-depthresearchinthechaintransmissionrelatedfields.PERAIRACM,etal[19],presentedamethodtoestablishmulti-bodydynamicsmodelofachaindrivesystemwithgeometricmathematics,andanalyzed

thelinkvelocity,acceleration,forceandtrajectory.YOUNG

JD,etal[20],proposedanarrangementofanon-symmetricandalternatingengagementtoothprofile,andamethodforinstallingthedampingrubberringintheoutsidesprockettoreducemeshingimpactandvibrationofrollerchaindrive

system.FUJIMOTON,etal[21],developedamethodtoachievechainnoisereductionbychangingmeshingtoothprofileoftheplateandthechainsprocket.MATSUDAal[22]presentedanewsilentchainanddevelopedasilentchainwithdouble-sidedengagement,whichcanachievemultiaxisdriveinspace.BasedonbyTROEDSSOI,Netal[23],presentedamathematicalmodel,anddevelopedamathematicalmodel.Bythismodel,oscillationandforceofthechaintransmissionsystemcanbecalculateddirectly.ThechoralactionandtransmissionerrorsofasimplesilentchainsystemwasinvestigatedbyHUANGC,etal[24],theyanalyzedthechoralactionbasedonthetoothcontactanalysisofthechainwiththedrivingsprocket.

DCTtransmissionsystemstudiedinthispaperisanewtypeGeminichainsystemofDCTbasedonanimprovedDCTchain

transmissionsystem.Basedonthemeshingtheoryofsilentchain,anewGeminichaintransmissionsystemisdesignedandthedynamicanalysismodelisestablished.BasedonRecurDynsoftware,thedynamiccharacteristicsareanalyzedandevaluated.ThenoisecharacteristicsoftheGeminichaintransmissionsystemareanalyzedthroughnoiseexperimental.Theinnovationofthispaperisthefirsttimecombinedthedesign,simulationanalysisandnoiseexperimentalwhichcanimprovethedesignandsimulation.Wecanverificationtherationalofdesignthroughsimulationanalysisand

experimental.

2MathematicModelingEstablished

2.1Parametersdesignofplate

Accordingtothemeshingtheoryofsilentchainand

sprocketandthedesignconditionsofGeminichainsystemindualclutchtransmission,theplatedesignoftheDCTGeminichaintransmissionsystemisshowninFig.2.Themain

parametersare:

holepitch

a,apothemf,halfangleoftooth

profilea.

Fig.2.Plateparameter

2.2Parametersdesignofsprocket

ThesprocketdesignoftheDCTGeminichaintransmissionsystemisshowninFig.3.Themainparametersare:

teethnumberZ,

pitchp,pitchdiameterd,tipdiameterdaandrootdiameterdf,measurementoverpinshR,measuringpindiameterdR.The

Geminichainsystemconsistsofcrankshaftsprocket（Gemini

sprocket）,clutchsprocket1

clutchsprocket2,chain1and

chain2.ThedesignparametersofsprocketsareshowninTable

1.

Fig.3.Sprocketparameter

Tabl^L”Designparametersofsprockets

Par^iiietfT

Geminisprocket

Clutch

sprocket1

Clutch

sprocket2

ToothnunibtTI

24

42

56

Pitchpy'nim

S.O

30

&Q

Pitchdiamtier（tmni

603

105,S

141,1

Rootdiameter击'nun

512

96.3

Bl7

Tipdiamerer4/nirn

554

105

140.4

Nleaiucemwitoverpms

DLUl

632

109

144.4

Nkasumgpmdiameter

血；mm

5.0

SO

5.0

2.3Parametersdefinition

（1）Accordingtothedesignrequirements,thespeedrangeofGeminisprocketisdefinedfrom0to6500r/min.

（2）ThenumberofwholechainlinksmustbecalculatedintheprocessofdesignandcalculationofDCTGeminichainsystem.Bycalculation,thenumberofchainlinksbetweenGeminisprocketandclutchsprocket1（chain1）is70,thenumberofchainlinksbetweenGeminisprocketandclutchsprocket2（chain2）is88.

（3）Relativecoordinatecentersofthethreesprocketsare:

theGeminisprocket（0,0,0）,clutchsprocket1（75.79,76.94,0）,theclutchsprocket2（203.79,76.94,0）。

（4）Accordingtoabovecalculation,thelengthofthechain1isL1=0.55m.Thelengthofchain2isL2=0.70

m[22-23]。

3SystemDynamicCharacteristicsAnalysis

3.1Systemdynamicmodel

AccordingtotheaboveparameterscalculationofGeminiplateandsprockets,thethree-dimensional（3D）modelwasestablishedinCATIAasbelow.Theplate3DmodelisshowninFig.4（a）withplatematerial50CrVA.Thepindiameteris2.98mmwithpinmaterial20CrMnMo.The3DmodelofGeminisprocketisshowninFig.4（b）.Itsteethnumberis24andtheworkingtoothprofileisinvolutewithsprocketmaterial40Cr.The3D

modelofclutchsprocket2isshowninFig.4（c）.Thetooth

numberis42andtheworkingtoothprofileisinvolutewithsprocketmaterial40Cr.The3Dmodelofclutchsprocket1isshowninFig.4（d）.Thetoothnumberis56andtheworkingtoothprofileisinvolutewithsprocketmaterial40Cr.ThematerialpropertiesareshowninTable2.

3.2Systemdynamiccharacteristics

Accordingtothestructureandlayoutofthedualclutch,

theGeminicha