对数螺旋锥齿轮啮合仿真与强度计算分析

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1、内蒙古科技大学硕士学位论文AbstractInmodernindustry,geartransmissionhasbeenwidelyusedasatraditionalformoftransferingmovementandpower.Geardesignandmanufacturingtechnologycontinuestomoveforward.Thelogarithmicspiralbevelgearhasauniqueadvantagethatthehelixanglesofeachpointfortoo

2、thlineareequaleverywhere.Thisnewformofgearcaneffectivelysolvesomeissuesforinstancethetransmissionisnotsmoothandtheefficiencyofpowertransmissionislow,whicharebroughtbythereasonthatthehelixangleisn’tequal.Thusitisnecessarytodeeplystudythiskindofgearinthedesignand

3、meshingrespects.Basedonthenumberofgeometriccharacteristicsoflogarithmicspiralbevelgear,thispaperpresentsanewmodelingmethodandsuccessfullyconstructsthemeshingmodeloflogarithmicspiralbevelgear.Basedonthis,thegearmeshingsimulationanalysisisoperatedwithANSYS/LS-DYN

4、Asoftwareinordertoobtainstressdistributionintheprocessoftoothcontact.Thetoothcontactstressandtoothrootbendingstressmagnitude,stressdistributionandvariationofcloudareanalyzed.Accordingtotheoperationresultofthenumericalsimulation，thepaperderivestheformulasoftooth

5、surfacecontactstressandtoothrootbendingstress.Thisresearchworksmainlyinthefollowingaspects:1.Basedonthemeshingtheoryanddesigntheoryoflogarithmicspiralbevelgear,apairofthree-dimensionalmodelofmeshinggearswillbecreated.Thearticleproposesanewmodelingmethodwhichinc

6、ludesthreeinnovationspots.First,usingtwoconicallogarithmicspiralofwhichtheincludedangleis360/2Ztodeterminethespacepositionoftoothprofilecurve,theinvolutecurvecanbepreciselylocated.Second,theconicallogarithmicspiralwhichcoiledaroundinthepitchconesurfaceisusedass

7、weptintothetrajectorysothattoothprofilecanbeguaranteedaccurately.Third,thescanningmixsectionisestablishedinthenormalplaneofsweptintothetrajectorysothatthetoothprofileofeachpointnormalplaneforgeartoothisthestandardtoothprofile.2.Basedonthis,thegearmeshingsimulat

8、ionanalysisisoperatedwithANSYS/LS-DYNAsoftwareinordertoobtainstressdistributionintheprocessoftoothcontact.Thetoothcontactstressandtoothrootbendingstressmagnitude,stressdistr