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1、重庆大学硕士学位论文英文摘要ABSTRACTTheresearchsubjectofthethesisstemsfromthesubtopic―KeyTechnologiesandtheIndustrializationoftheMarineGearbox‖whichbelongstotheproject―Thestudyofkeytechnologiesofhigh-speedheavy-dutyprecisetransmission‖(2006BAF01B07-02)intheNationalScienceandTechnol
2、ogyPillarProgramduringtheEleventhFive-yearPlanPeriodofChina.High-speedmarinegearboxwithsmalldown-anglecanmeettherequirementsofaheadrunningforvesselsbyusingintersectedinvolutebeveloidgears.However,theoretically,themaindisadvantageinintersectedaxisapplicationisthecontac
3、tpathispoint-wisewhichtendstocauselowertransmissionefficiency,lowerduration,highernoiseandvibrationandseriouswearproblems,limitingthebearingcapacityseriously.Forabove-mentioned,consideringthelinecontactcondition,basedonthestructuralcharacteristics,thespatialgearingthe
4、ory,geometrydesignmethods,theprecisionmanufacturingtheoryandmeshingcharacteristicsofintersectedinvolutebeveloidgearsareinvestigatedwhichhasgreatpracticalvaluesandindustrialsignificance.Themaincontentsofthisthesisareshownasfollows:①Onthebasisofspatialgearingtheory,them
5、eshingtheoryofpitchconedesignforintersectedbeveloidgearsusedinmarinegearboxwithsmallshaftangleisdeveloped.Basedonmechanicaldesigntheoryandgearmeshingtheory,consideringthefactorsincludingundercuttingphenomenon,pointingphenomenon,toothinterferencephenomenonandnon-backla
6、shmeshing,themodificationcoefficientsofbeveloidgearsarecalculated.Bythehobbingtheory,arackcutterisusedtogeneratethebeveloidinvolutegearsandthecorrespondingMatlabGUIprogramiswrittentogeneratethegearsurfacepointset.CombinedwithPro/E,the3-dimentionalsolidmodelofbeveloidg
7、eariscreated.②Thecorrectmeshingconditionsforbeveloidgearsareproposed.TheTCAmodelisbuiltbasedonthetangentcontactconditionstoresearchtheinfluencesofprofile-shiftcoefficients,shaftangleerrorandaxialpositionerroronthecontactpath.Theformulastotransformpointcontacttolinecon
8、tactarederivedandtheinfluencesofgeometricalparametersonfirstprincipaldirections(FPD)angleareresearched.Accordingtothelengtho
