旋轉(zhuǎn)機(jī)械永磁軸承的失效模式與加速壽命試驗(yàn)研究.pdf

1、⑧天事大謦碩士學(xué)位論文J●■【n■_NL“O]L“W一一■i_■L■J■學(xué)科專(zhuān)業(yè)：測(cè)試計(jì)量技術(shù)及儀器作者姓名：姚江偉指導(dǎo)教師：張國(guó)雄教授T：啦J_出工TT由止Ⅱ亡ABSTRACTPermanentmagneticbearingisanimportantpartinrotatinglIlachineBasedonthefunctionandreliabilitythedesignprincipleforthepermanentmagnet

2、icbearinginrotatingmachineisputforwardFailureModeEffectandCriticalityAnalysis(FMECA)iSstudiedforthepermanentmagneticbearing，andcorrespondingdesignsformagneticbearingaremadetoenhancethereliabilityInaddition，themainfailure

3、modeandfailurecausesarefoundbyFMECAitisfoundthattheadditionalalternatemagneticfieldwithinthemachinecausingthepermanentmagnettodemagnetizeisthemainfailuremodeofthepermanentmagneticbearinginrotatingmachineBasedontheanalysi

4、softhefailuremodeandmechanism，apermanentmagnetacceleratedlifetestingmethodisputforwardandatestbedisdesignedandsetup，onwhichthestateofpermanentmagnetbeingdemagnetizedbytheactionofalternatemagneticfieldisinvestigatedBymean

5、softhetestbed，anexperimentequivalentto162yearsoperationoftherotatingmachineundernormalworkingconditioncanbecarriedoutinarelativelyshorttimeThevariationsoftheaxialmagneticattractionandradialrigidityofthepermanentmagnetare

6、determinedThemathematicmodelofthedecreaseofaxialmagneticattractionwithtimeiSestablishedAnexperimentalbaseforlifedesignoftherotatingmachinepermanentmagneticbearingisprovided1hemaincreativeworkbeinginvolvedinthethesisis：Ba

7、sedonthepermanentmagnetacceleratedlifetestingmethodwhichiSputforwardandbymeansofthetestbedwhichiSdesignedandsetup，theacceleratedlifetestingisstudiedforthepermanentmagneticbearing，andvaluableresearchresultisacquiredKeywor