人字槽径向气体动压润滑轴承特性分析.pdf

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1、2014年9月润滑与密封Sep．2014第39卷第9期LUBRICATIONENGINEERINGVo1．39No．9DOI：10．3969／j．issn．0254—0150．2014．09．015人字槽径向气体动压润滑轴承特性分析董玛莉李松生鲁豫鑫邵娟(上海大学机电工程与自动化学院，上海市智能制造及机器人重点实验室上海200072)摘要：建立人字槽径向气体动压润滑轴承的数学模型，采用局部积分有限差分法在不连续求解域内推导出气体润滑Reynolds方程的差分形式，通过求解获得轴承间隙内的气膜厚度、气膜压力、轴承承载力等状态特性，并分析径向间隙、螺旋角、槽深比、

2、槽宽比和槽数等轴承几何结构参数以及转速等工况条件变化对轴承承载能力的影响规律。结果表明：人字槽轴承的压力在圆周方向呈锯齿形分布，人字形压力带环抱在轴颈上，使轴承在各个方向上均能承载，从而提高了轴承的抗振性和平稳性；增大偏心率，减小气膜间隙，增大螺旋角，减小槽深，增加槽宽比，适当增加槽数，均可提高轴承承载力；人字槽结构能够更好地实现气体动压润滑轴承动压效应，提高了轴承的承载能力和稳定性能。关键词：人字槽轴承；动压润滑；气体润滑；承载能力中图分类号：TH123文献标识码：A文章编号：0254—0150(2014)9—074—5CharacteristicsAnal

3、ysisofHerringboneGroovedRadialAerodynamicLubricationBearingsDongMallLiSongshenflLuYuxinShaoJuan(ShanghaiKeyLaboratoryofIntelligentManufacturingandRobotics，SchoolofMechatronicEngineeringandAutomation，ShanghaiUniversity，Shanghai200072，China)Abstract：Themathematicmodelofherringbonegroo

4、vedradialaerodynamiclubricationbearingswasestablished，andthedifferentialformofReynoldsequationofgaslubricationunderobliquecoordinatesystemwasdeducedbyusingfinitedifferentialmethod．Thecharacteristicssuchasthefilmthickness，filmpressureandloadcapacityinsidetheclearanceofbearingwereobta

5、inedusingnumericalintegralmethod，andtheeffectsofthebearinggeometricalstructuralparametersofthebearingradialclearance，spiralangle，groovedepth，groovewidthrateandnumberofgroove，androtatespeedofvari—OUSworkingconditionsonbearingcapacitywereanalyzed．Theresultsshowthatthepressureofherring

6、bonegroovedbear—ingisdistributedinhackleincircumferencedirection，andtheherringbonepressurebandisencircledontheneckofshaft，whichmakesthebearingtoachievebearingloadinalldirections，therebyimprovesitsstablenessandanti-vibra—tion．Theloadcapacityofbearingcanbeimprovedallbyincreasingtheecc

7、entricity，reducingaverageclearanceofgasfilm，increasingspiralangle，decreasinggroovedepth，increasinggroovewidthrateandsuitablyincreasingnumberofgroove．Theherringbonegroovedstructurecanbetterachievethedynamiceffectofaerodynamiclubricationbearings，andimprovestabilityandloadcapacityofthe

8、bearings．Keywords：h