資源描述：
《軸承壽命分析外文翻譯》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫。
1、猶方民族丈醪早坐殺針外夂輸鋅翻鋅軀目/軸承失數(shù)今斬般名向璉標曇號20091210專地過程裝備與控制工程指導教師猶方民族？;醪教務(wù)處制BEARINGLIFEANALYSISABSTRACTNatureworkshardtodestroybearings,buttheirchancesofsurvivalcanbeimprovedbyfollowingafewsimpleguidelines.Extremeneglectinabearingleadstooverheatingandpossiblyseizureor
2、,atworst,anexplosion.Butevenafailedbearingleavescluesastowhatwentwrong?Afteralittledetectivework,actioncanbetakentoavoidarepeatperformance.KEYWORDS:bearings,failures,life1?WHYBEARINGSFAILAnindividualbearingmayfailforseveralreasons;however,theresultsofanendur
3、ancetestseriesareonlymeaningfulwhenthetestbearingsfailbyfatigue-relatedmechanisms.Theexperimentermustcontrolthetestprocesstoensurethatthisoccurs.Thefollowingparagraphsdealwithafewspecificfailuretypesthatcanaffecttheconductofalifetestsequence.theinfluenceoflu
4、bricationoncontactfatiguelifeisdiscussedfromthestandpointofEHLfilmgeneration.Therearealsootherlubrication-relatedeffectsthatcanaffecttheoutcomeofthetestseries.Thefirstisparticulatecontaminantsinthelubricant.Dependingonbearingsize,operatingspeed,andlubricantr
5、heology,theoverallthicknessofthelubricantfilmdevelopedattherollingelement-racewaycontactsmayfallbetween0.05and0.5“m?Solidparticlesanddamagetheracewayandrollingelementsurfaces,leadingtosubstantiallyshortenedendurances.Therefore,filtrationofthelubricanttothede
6、siredlevelisnecessarytoensuremeaningfultestresultThedesiredlevelisdeterminedbytheapplicationwhichthetestingpurportstoapproximate.Ifthisdegreeoffiltrationisnotprovided,effectsofcontaminationmustbeconsideredwhenevaluatingtestresults-Themoisturecontentinthelubr
7、icantisanotherimportantconsideration.Ithaslongbeenapparentthatquantitiesoffreewaterintheoilcausecorrosionoftherollingcontactsurfacesandthushaveadetrimentaleffectonbearinglife?However,thatwaterlevelsaslowas50-100partspermillion(ppm)mayalsohaveadetrimentaleffe
8、ct,evenwithnoevidenceofcorrosion.Thisisduetohydrogenembrittlementoftherollingelementandracewaymaterial?Amaximumof40ppmisconsiderednecessarytominimizelifereductioneffects.Thechemicalcompositionof
