接触网系统受流质量及浸金属碳载流磨损特性试验研究

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1、西南交通大学硕士学位论文接触网系统受流质量及浸金属碳载流磨损特性试验研究姓名：李灵敏申请学位级别：硕士专业：机械设计及理论指导教师：陈光雄20080501AbstractWithChina，Surbanization，moreandmoreattentionispaidtoanelectrifiedrailroadowingtoitspredominanceinenvironmentalprotection，energysaving,economy,safetyandSt)on．Thecontactnetworksyste

2、misoneofthethreedifficultproblemsfbranelectrifiedrailroad．Therefore，thestudyoncurrent·receivingqualityofcontactnetworksystemsandweal?behaviorwithelectriccurrentisofsignificanceineconomicbenefitsandindevelopmentofrailwaytransportations．Aseriesoftestsonthecurrent-re

3、ceivingqualityofacontactnetworksystemandthewearbehaviorofstainlesssteel316／copper-impregnatedmetallizedcarbonwithelectriccurrentwerestudiedonahighspeedpin—on-discfrictionandweartester．Thefactorsaffecting’thecurrent-receivingqualityofthecontactnetworksystemwereanal

4、yzedbasedonthevoltagesignalscollectedbyadynamicdataacquisitionsystem．Theweal"masslossofpinspecimenswasweightedbyapreciseelectronicbalance．WommorphologyofthespecimensWasobservedbymeansofOpticalMicroscopy(OM)，LaserConfocalScanningMicroscopy(LCSM)andSEM．Thee五fectsofi

5、nitialcurrent，contactforce，stiffness，thepolarityofpinspecimens，slidingspeed，etconweal"behaviorwerestudied．Theresultswereasfololows：．1．Thecurrent．receivingqualityofacontactnetworksystemkeepsstableatlowspeedanditwouldbecomebadwithanincreaseinspeed．Furthermore，vibrat

6、ioncharacteristicsofthecontactnetworksystemandsurfacecharactedsticsofslidingfrictionpairsalsoaffecttheperformanceofthecurrent—receivingquality．2．Inthetestparameters，thelargerthecontactnormalforce，thebetterthecurrent．receivingqualitybecomesandthehighertheslidingspe

7、edcorrespondingtogoodcurrent．receivingquality．Thecurrent-receivingqualitywhenthepinspecimensalesupportedbyspringelementsbecomesbetterthanthatwithoutspringsupports·3．Forastainlesssteel316／copper-impregnatedmetaUizedcarboncouple，theweal"rateofpinspecimenswithoutelec

8、triccurrentexhibitsamonotoneincreasewithincreasingspeed．Thewearmechanismismainlyattributedtoadhesionandabrasion·西南交通大学硕士研究生学位论文第1lI页l__l—-l___I__●l_l●l_