旋轉(zhuǎn)機械永磁軸承的失效模式與加速壽命試驗研究.pdf

1、⑧天事大謦碩士學位論文J●■【n■_NL“O]L“W一一■i_■L■J■學科專業(yè)：測試計量技術(shù)及儀器作者姓名：姚江偉指導教師：張國雄教授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