轴承失效分析 毕业论文外文翻译

《轴承失效分析 毕业论文外文翻译》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、外文翻译翻译题目：轴承失效分析姓名学号20091210专业过程装备与控制工程指导教师北方民族大学教务处制BEARINGLIFEANALYSISABSTRACTNatureworkshardtodestroybearings,buttheirchancesofsurvivalcanbeimprovedbyfollowingafewsimpleguidelines.Extremeneglectinabearingleadstooverheatingandpossiblyseizureor,atworst,anexplosio

2、n.Butevenafailedbearingleavescluesastowhatwentwrong.Afteralittledetectivework,actioncanbetakentoavoidarepeatperformance.KEYWORDS:bearings,failures,life1.WHYBEARINGSFAILAnindividualbearingmayfailforseveralreasons;however,theresultsofanendurancetestseriesareonlymea

3、ningfulwhenthetestbearingsfailbyfatigue-relatedmechanisms.Theexperimentermustcontrolthetestprocesstoensurethatthisoccurs.Thefollowingparagraphsdealwithafewspecificfailuretypesthatcanaffecttheconductofalifetestsequence.theinfluenceoflubricationoncontactfatiguelife

4、isdiscussedfromthestandpointofEHLfilmgeneration.Therearealsootherlubrication-relatedeffectsthatcanaffecttheoutcomeofthetestseries.Thefirstisparticulatecontaminantsinthelubricant.Dependingonbearingsize,operatingspeed,andlubricantrheology,theoverallthicknessofthelu

5、bricantfilmdevelopedattherollingelement-racewaycontactsmayfallbetween0.05and0.5m.Solidparticlesanddamagetheracewayandrollingelementsurfaces,leadingtosubstantiallyshortenedendurances.Therefore,filtrationofthelubricanttothedesiredlevelisnecessarytoensuremeaningfult

6、estresult.Thedesiredlevelisdeterminedbytheapplicationwhichthetestingpurportstoapproximate.Ifthisdegreeoffiltrationisnotprovided,effectsofcontaminationmustbeconsideredwhenevaluatingtestresults.Themoisturecontentinthelubricantisanotherimportantconsideration.Ithaslo

7、ngbeenapparentthatquantitiesoffreewaterintheoilcausecorrosionoftherollingcontactsurfacesandthushaveadetrimentaleffectonbearinglife.However,thatwaterlevelsaslowas50-100partspermillion(ppm)mayalsohaveadetrimentaleffect,evenwithnoevidenceofcorrosion.Thisisduetohydro

8、genembrittlementoftherollingelementandracewaymaterial.Amaximumof40ppmisconsiderednecessarytominimizelifereductioneffects.Thechemicalcompositionofthetestlubrica