球轴承外圈剥落初期双冲击现象IAS建模

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关键词：球轴承；故障机理建模；初期局部剥落；弹性四分之一空间方法；双冲击现象 中图分类号：TH133.33；TH113.1 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202306056

Modeling of dual-impulses phenomenon of incipient spalled outerraceball bearing

LIChao 1，2 ，GUO Yu’，LUO Maolin³，CHEN Xin'

（1.FacultyofMechanicaland ElectricalEngineering，Kunming UniversityofScienceand Technology，Kunming6505，China;

2.YunnanCommunications Vocationaland Technical Colege，Kunming 6505oo，China;3.SchoolofAdvanced Manufacturing Engineering，Chongqing University of Posts and Telecommunications，Chongqing 4Ooo65，China）

Abstract：Analysis of theinstantaneous angular speed（IAS）has beenproven to efectivelydetect bearing faults.To investigate thegeneration mechanismofIASsignaldouble-impulses phenomenon inballbearings，adynamic model isproposedinthis paper basedonthecouplingcharacteristicsbetwentheormal，tangentialforcesandthetimevaryingimpactexcitation，inwhichtheinfluencesoftherollngresistanceandthesharpedgesoflocaldefectonthedynamicbehaviorareconsidered.Inthismodel，theelas ticquarterspace methodisadoptedtocalculatetheadditionaldeformationinducedbythelocalspalededgesanditscorresponding time-varyingdisplacementexcitationmodelisdeduced.Aditioalcontactforcesandtievaryingdisplacementexcitatiosarecon sideredwhensteelballenterintoandexitfromthedefect.Thedisturbancesofnormalandtangentialforcesinthebearingunder sharpedgeexcitationsoflocalfaultarestudied，andthetimevaryingtangentialforceexcitationmodelisalsodeduced.Thenolin eardynamicequationsets aresolved using the Runge-Kutanumerical integration method.Comparisons between thesimulationre sultsandtheactual measuredresultsofouterracelocalfaultbearingsshowtheestablished dynamic modelcanefectivelyrevealthe mechanism of double-impulses phenomenon based on IAS signals.

Keywords：ballbearing；faultmechanismmodeling;initiallocalspall;elasticquarterspacemethod;dualimpulsephenomenon

动力学建模能够从机理上阐释故障球轴承的动力学行为，并指导轴承状态监测方法的研究。（剩余10381字）