24环境技术/EnvironmentalTechnology环境试验nvironmentalTestingE摘要:某型航空直流接触器在使用中出现主触头输入端烧毁故障。通过故障树综合分析,采用模拟烧毁试验手段对送检的接触器开展故障原因分析。结果表明,主触头输入端被烧毁的原因主要是接触器接触片表面氧化、接触处有污物,导致接触片与外接导线的接线片之间的接触电阻过大。在实际使用过程中,应结合定期检查工作,对接触器的螺母紧固、接触片的表面状态是否存在氧化发黑等情况进行外观检查,视情更换接触器,避免主触头接触片发生烧毁故障。关键词:航空接触器;主触头;输入端;接触电阻;烧毁故障中图分类号:TM572.1文献标识码:A文章编号:1004-7204(2023)02-0024-05航空接触器主触头输入端烧毁故障及原因分析FailureandCauseAnalysisofMainContactInputEndBurnoutofAviationContactor张元峰1,张秋生2,于春风1,张溪3(1.海军航空大学青岛校区,青岛266041;2.92635部队,青岛266041;3.95866部队,保定071051)ZHANGYuan-feng1,ZHANGQiu-sheng2,YUChun-feng1,ZHANGXi3(1.QingdaoCampusofNavalAeronauticalEngineering,Qingdao266041;2.92635Troops,Qingdao266041;3.95866Troops,Baoding071051)Abstract:ThemaincontactinputterminalofacertaintypeofaviationDCcontactorwasburntoutinuse.Throughfaulttreecomprehensiveanalysis,thefaultcausesofthecontactorsubmittedforinspectionwereanalyzedbymeansofsimulatedburningtest.Theresultsshowthatthemaincontactinputendisburntmainlybecausethecontactpiecesurfaceofthecontactorisoxidizedandthereisdirtatthecontactpoint,resultinginexcessivecontactresistancebetweenthecontactpieceandthelugoftheexternalwire.Intheactualuseprocess,incombinationwiththeregularinspectionwork,thefasteningofthecontactornutandtheappearanceinspectionofthecontactstripsurfaceforoxidationandblackeningshouldbecarriedout,andthecontactorshouldbereplacedasappropriatetoavoidburningfailureofthemaincontactstrip.Keywords:aviationcontactor;maincontact;inputterminal;contactresistance;burnoutfailure引言航空接触器具有电路通断控制功能,主要用于控制交流、直流主电路或大容量电路通断的控制开关,其可靠性直接决定控制系统工作的稳定性[1-2]。一直以来,由于航空接触器故障而影响飞机飞行安全的事件很多[3-4]...