滚动轴承寿命计算中当量动载荷确定

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:ZZHD.chinajournal.net.cnE2mail:[e-mail]:(1977),,,,,,,(,442002):,:;;:TH133.33:B:167125276(2010)0220068203DefinitionofEquivalentDynamicLoadforCalculatingLifetimeofRollingBearingsWANGHuan,WANGHong2xia,LIUQiang(DepartmentofMechanicalEngineering,HubeiAutomotiveIndustriesInstitute,Shiyan442002,China)Abstract:Thelifetimeofrollingbearingsisanimportantindexbywhichthecarryingcapacityofrollingbearingcanbejudged.Thecalculationoftheequivalentdynamicloadisacoreproblemincalculatingthelifetimeofrollingbearings.Themethodforcalculatingoftheequivalentdynamicloadisdifferentinvarioussortofbearings.Generalprocessanddifficultyofthecalculationofequivalentdy2namicloadofrollingbearingsareemphaticallyintroducedinthisarticle.Keywords:rollingbearings;lifetime;equivalentdynamicload0,,,,,,1,,,,,,,LundergPalmgren[1](),90%[2]:Lh=16667nCPh:P;C;,=10/3,=3100(106)h,,,2P,[2]:P=xFr+yFa,2.1,,P=Fr,,P=Fa,P=xFr+yFa2.2,,,86©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2):6870:16310,Fa=1450N,Fa1=0;Fa2=1450N[3]6310Cr=47500N,C0=35600NFa2C0=145035600=0.04e=0.24[2]Fr1/Fa1Fr2/Fa2,e,x,y,P1P212.3(),,,,,,Fr,()Fs1Fs2,FrFa,:a):,Fr1Fr2;b):Fa1Fa2Fs,Fs=Fr/2y,yFa/Frey(),,,,,2(a),12;2(b)122c):,[4]:1):,,()(),,,,2):Fa1Fa2,:Fa1=Fs1Fs2Fa(FaFs2,);Fa2=Fs2Fs1Fa(FaFs1,),,:Fa1=Fs1=680Fa1=Fs2-Fa=340-1200=-860NFa1=680NFa1=680N,Fa1=860N,d):Fr1/Fa1Fr2/Fa2e,x,y,P1P23:3.1(),(),396©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:ZZHD.chinajournal.net.cnE2mail:[e-mail]3,,:(),,2,,,,,3.2e,(10000)(30000)e,e,ef0Fa/C0r;=15,eFa/C0;=25=40,e,0.681.143.31):,()(),,,,,,,2):Fa1Fa2,Fa1Fa2,Fa1Fa2,,3.4x()xiFa/C0r,,,,,,,(x=1,y=0),Fa,,,200N,,,iFa/C0rFaC0r/i,C0r/iiFa/C0re[5]4,,:[1]GB/T639122003[S].2003,11.[2],.[M].:,2006.[3],,.[M].:,2003.[4],.[M].:,2003.[5],.[M].:,2005.:2009082707