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1、2014年9月潤滑與密封Sep．2014第39卷第9期LUBRICATIONENGINEERINGVo1．39No．9DOI：10．3969／j．issn．0254—0150．2014．09．015人字槽徑向氣體動壓潤滑軸承特性分析董瑪莉李松生魯豫鑫邵娟(上海大學(xué)機電工程與自動化學(xué)院，上海市智能制造及機器人重點實驗室上海200072)摘要：建立人字槽徑向氣體動壓潤滑軸承的數(shù)學(xué)模型，采用局部積分有限差分法在不連續(xù)求解域內(nèi)推導(dǎo)出氣體潤滑Reynolds方程的差分形式，通過求解獲得軸承間隙內(nèi)的氣膜厚度、氣膜壓力、軸承承載力等狀態(tài)特性，并分析徑向間隙、螺旋角、槽深比、
2、槽寬比和槽數(shù)等軸承幾何結(jié)構(gòu)參數(shù)以及轉(zhuǎn)速等工況條件變化對軸承承載能力的影響規(guī)律。結(jié)果表明：人字槽軸承的壓力在圓周方向呈鋸齒形分布，人字形壓力帶環(huán)抱在軸頸上，使軸承在各個方向上均能承載，從而提高了軸承的抗振性和平穩(wěn)性；增大偏心率，減小氣膜間隙，增大螺旋角，減小槽深，增加槽寬比，適當(dāng)增加槽數(shù)，均可提高軸承承載力；人字槽結(jié)構(gòu)能夠更好地實現(xiàn)氣體動壓潤滑軸承動壓效應(yīng)，提高了軸承的承載能力和穩(wěn)定性能。關(guān)鍵詞：人字槽軸承；動壓潤滑；氣體潤滑；承載能力中圖分類號：TH123文獻標識碼：A文章編號：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
