Copyright: Wafangdian City Shan Bao Bearing Manufacturing Co., Ltd. Powerby：300.cn 辽ICP备00000号
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Failure judgment of angular contact ball bearing
Whethertheangularcontactballbearingcanbeusedismainlydeterminedbyconsideringthedamagedegree,mechanicalproperties,importance,operationconditionsandthenextmaintenanceperiod.Iftherearethefollowingdefects,itcannotbeusedanymore,andthethrustballbearingmustbereplacedwithanewone.Therearecracksornotchesonanyoneoftheinnerring,outerring,rollingelementandcage.Wearfailureisoneofthecommonfailuremodesofallkindsofbearings,whichcanbedividedintothemostcommonabrasivewearandadhesivewear.Wecanjudgewhetherthebearinghasreachedwearfailurebythefollowingtechnologies: 1.Oilfilmresistancediagnosistechnology Features:thesameevaluationstandardcanbeusedfordifferentworkingconditions.Theresultsofdiagnosisofsurfacepeeling,indentationandcrackarepoor Applicationscope:itissuitablefortheoccasionwheretherotatingshaftisexposed. 2.Vibrationdiagnosistechnology Features:vibrationdiagnosistechnologyiswidelyused;onlinemonitoringcanberealized;diagnosisisfastanddiagnosistheoryismature. Applicationscope:itisespeciallysuitableforfaultmonitoringofangularcontactballbearinginrotatingmachinery. 3.Ferrographydiagnosistechnology Features:themachinedoesnotneedtobedisassembled;theinvestmentislowandtheeffectisgood;theearlyfatiguefailureofoil-freebearingcanbefound;thewearmechanismcanbestudied. Applicationscope:itissuitableforthefaultdiagnosisofangularcontactballbearinglubricatedwithlubricatingoil,anditisdifficultforbearinglubricatedwithgrease. 4.TemperatureDiagnosisTechnology Features:thediagnosisissimple,andtheeffectofjudgmentisgood. Scopeofapplication:itissuitableforsimpleconventionaldiagnosisofbearingsinmachines. 5.Opticalfibermonitoringanddiagnosistechnology Features:highsensitivityofopticalfiberdisplacementsensor;directextractionofsignalfromoil-freebearingsurfacetoimprovethesignal-to-noiseratio;candirectlyreflectthemanufacturingquality,surfacewear,load,lubricationandclearanceofangularcontactballbearing. Applicationscope:suitableforthemachinethatcaninstallthesensorinthebearingseat. 6.Acousticemissiondiagnosistechnology Features:rapidandsimplediagnosis,on-linemonitoring. Applicationscope:thenewtechnologydevelopedinrecentyearsisseldomusedinbearingconditionmonitoring. Intheprocessoftesting,whentheoil-freebearingisdirectlytakenbyhand,thesweatonthehandshallbefullywashedoff,andtheoperationshallbecarriedoutaftertheapplicationofhigh-qualitymineraloil.Inrainyseasonandsummer,specialattentionshallbepaidtorustprevention.Undersomespecialoperatingconditions,thelifeofangularcontactballbearingcanbelongerthanthatoftraditionalcalculation,especiallyunderlightload.Thesespecialoperatingconditionsarewhentherollingsurface(trackandrollingelement)iseffectivelyseparatedbyalubricatingoilfilmandlimitsthepossiblesurfacedamagecausedbypollutants.Infact,underidealconditions,theso-calledpermanentbearinglifeispossible. Whentheangularcontactballbearingrotatesandtheracewaysurfacebetweentheinnerringandtheouterringisinrollingcontactwiththerollingbody,therunningtrackisadarksurface.Therunningtrackattachedtotheracewaysurfaceisnotabnormal,sotheloadconditionscanbeknown.Therefore,whendisassemblingtheoil-freebearing,pleasepaycloseattentiontoandobservetherunningtrackoftheracewaysurface.
2020-04-19
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