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1、NASATechnicalMemorandum86958eii'LubricationandPerformanceofHigh-,dSpeedRolling-Element.Bearings"iLI-{_ASA-TM-66958)10BRZCATICNINDPRRPORMA_CEN85-21658ORHIGB-SP_DRCLZING-RL_BEN2_IEZNGS-;(liPS,)19pBCAO2/B_E01CSCL131I',-__Oncla=I,__G3/3714528i-'ErwinV.Zaretsky,FredrickT.SchuUer,_iandHaroldH.Coe"":
2、_LewisResearchCenteri_.,.Cleveland,OhiolitPreparedforthe1985AnnualMeetingofthe,,,r,,r-_-._,AnzericanSocietyofLubricationEngineers_"."_''_-''.LasVegas,Nevada,May6-9,1985/_.A0_7es_L&+''1iILUBRICATIONANDPERFORHANCEOFHIGH-SPEEDROLLING-ELEHENTBEARINGSiErwlnV.Zaretsky,FredrlckT.Schuller,andHaroldH.C
3、oeiNatlonalAeronauticsandSpaceAdmlnlstratlonLewlsResearchCenterrCleveland,Ohto44135ABSTRACT_ITrendstnalrcraftengtneoperatingspeedshavedtctatedtheneedforrolling-elementbearingscapableofspeedsto3m1111onDN.Areviewofhigh-speedrolling-elementbeartngstate-of-the-artperformanceandlubricationts_presen
4、ted.Throughtheuseofunder-racelubricationand"BearingThermali:c_0_Management"beartngoperationcanbeobtatnedtospeedsof3mtlltonDNJet_i-,m0_1lubricatedballbeartngsare11mttedto2.5mt111onONforlargeborestzesand::_to3mt111onDNforsmallborestzesCurrentcomputerprogramsareabletopredtctbeartngthermalperforma
5、nce.tINTRODUC1IONrCurrentproductionengtnebeartngsgenerallyoperateatspeedslessthanc,i2.3mtlltonDNmandattemperaturesgenerallylessthan490K(425°F).Becausecompressororturbtnebladettpspeedsanddtskburststrengthsbegini;to11mttthemaxtmumspeedofrotattngcomponents,abearingspeedof3mt111onONIs_qulvalenttot
6、hepractlcalllmltofalrcraftenglneoperation.Conven-ttonallubricationmethodologygenerally11mttedbearingspeedstolessthan,i2mt111onDN._iAproblemassociatedwtthoperatingbearingsathtghspeedlstheneedtoadequatelycoolthebeartngcomponentsbecauseofrelativelyhighheatgenera-i',tton.Onemethodusedsuccessfullyt
7、o3mtlltonDNIstoapplycoolinglubrt-;cantundertherace(ref.1).Lubricanttscentrifugallyln3ectedthroughthez:splltInnerraceandshouldersofanangular-contactballbeartngthroughapluralityofradtalholes.Asaresult,boththecoollngandlubricantfunc-tionts
