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1、2006年9月潤滑與密封Sep12006第9期(總第181期)LUBRICATIONENGINEERINGNo19(serialNo1181)3線接觸彈流潤滑綜合數(shù)值分析尹昌磊楊沛然楊萍(青島理工大學機械工程學院山東青島266033)摘要:應用多重網(wǎng)格法和多重網(wǎng)格積分法數(shù)值求解了Newton流體和Ree2Eyring流體線接觸等溫和熱彈流潤滑問題,分析了滑滾比對摩擦因數(shù)的影響,指出了潤滑油的流變性和熱效應對線接觸彈流潤滑油膜粘度的影響,以及不同滑滾比時壓力、膜厚和溫度的分布規(guī)律。結(jié)果表明:等溫潤滑時的摩擦因數(shù)隨著滑滾比的增加而增加,熱彈流潤滑時的摩擦因數(shù)隨著滑滾比的增加先增加后
2、減小,熱效應和非牛頓流體的剪稀作用均會使?jié)櫥偷牡刃д扯冉档?從而影響摩擦因數(shù);熱效應的存在使油膜變薄,且在所討論的工況條件下Newton流體的膜厚比Ree2Eyring流體的稍薄,熱效應使第二壓力峰變矮,且Ree2Eyring流體的第二壓力峰矮于Newton流體的第二壓力峰;純滾動時,Ree2Eyring流體的溫度比Newton流體的溫度高,有滑滾比時,Newton流體的溫度比Ree2Eyring流體的溫度高,且油膜的溫度隨滑滾比的增加而增加。關(guān)鍵詞:Newton流體;Ree2Eyring流體;線接觸;等溫和熱彈流潤滑中圖分類號:TH11712文獻標識碼:A文章編號: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
