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1、2006年9月润滑与密封Sep12006第9期(总第181期)LUBRICATIONENGINEERINGNo19(serialNo1181)3线接触弹流润滑综合数值分析尹昌磊杨沛然杨萍(青岛理工大学机械工程学院山东青岛266033)摘要:应用多重网格法和多重网格积分法数值求解了Newton流体和Ree2Eyring流体线接触等温和热弹流润滑问题,分析了滑滚比对摩擦因数的影响,指出了润滑油的流变性和热效应对线接触弹流润滑油膜粘度的影响,以及不同滑滚比时压力、膜厚和温度的分布规律。结果表明:等温润滑时的摩擦因数随着滑滚比的增加而增加,热弹流润滑时的摩擦因数随着滑滚比的增加先增加后
2、减小,热效应和非牛顿流体的剪稀作用均会使润滑油的等效粘度降低,从而影响摩擦因数;热效应的存在使油膜变薄,且在所讨论的工况条件下Newton流体的膜厚比Ree2Eyring流体的稍薄,热效应使第二压力峰变矮,且Ree2Eyring流体的第二压力峰矮于Newton流体的第二压力峰;纯滚动时,Ree2Eyring流体的温度比Newton流体的温度高,有滑滚比时,Newton流体的温度比Ree2Eyring流体的温度高,且油膜的温度随滑滚比的增加而增加。关键词:Newton流体;Ree2Eyring流体;线接触;等温和热弹流润滑中图分类号:TH11712文献标识码:A文章编号:0254
3、-0150(2006)9-070-4GeneralAnalysisofLineContactElastohydrodynamicLubricationYinChangleiYangPeiranYangPing(Dept.ofMechanicalEngineering,QingdaoTechnologicalUniversity,QingdaoShandong266033,China)Abstract:TheisothermalandthermallinecontactelastohydrodynamiclubricationwithNewtonianandRee2Eyringm
4、odelswereinvestigatednumericallywiththemultigridmethodandthemulti2levelmulti2integrationmethod.Theinfluenceoftheslide2rollratioonthefrictionalcoefficientwasanalyzed,andtheinfluenceoftherheologicalpropertyandthethermaleffectontheviscosityoftheoilandthedistributionsofthepressure,filmthicknessa
5、ndtemperaturewithvariousslide2rollratioswereindicated.Theresultsshowthat,astheslide2rollratioincreases,thefrictionalcoefficientpredictedbytheisothermalsolutionsincreasesmonotonously,whereasthefrictionalcoefficientpredictedbythethermalsolutionfirstincreasesandthendecreases.Boththethermalandth
6、enon2Newtonianshearthinningeffectscanreducetheeffectiveviscosityofthelubricant,sotheyaffectthefrictionalcoefficient.Theexistenceofthermaleffectcanreducethefilmthickness,andthefilmthicknesspredictedbytheNewtoniantheoryisalittlesmallerthanthatpredictedbytheRee2Eyringtheoryunderthediscussedoper
7、atingconditions,meanwhile,thermaleffectcanreducetheheightofthepressurespike,andthespikeobtainedbytheRee2EyringsolutionislowerthanthatobtainedbytheNewtoniansolution.Underpurerollingconditions,thefilmtemperatureofferedbytheRee2Eyringsolutionishighert
