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时间:2020-03-25
《弓网振幅对纯碳及浸金属碳滑板载流摩擦磨损性能的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2015年9月润滑与密封Sep.2015第40卷第9期LUBRICATIONENGINEERINGVo1.40No.9DOI:10.3969/j.issn.0254—0t50.2015.09.005弓网振幅对纯碳及浸金属碳滑板载流摩擦磨损性能的影响陈伟陈光雄李红周培勇(西南交通大学牵引动力国家重点实验室摩擦学研究所四川成都610031)摘要:应用环一块式摩擦磨损试验机研究不同弓网振动幅值下纯碳/铜合金和浸金属碳/铜合金2种摩擦副的载流摩擦磨损行为。试验结果表明:弓网之间在不间断地发生近似正弦规律的振动。2种摩擦副的电弧功率都随着振动幅值
2、的增大呈现先增大后减小的趋势,纯碳滑块更容易发生起弧现象,电弧功率更大;2种摩擦副的摩擦因数都随着振动幅值的增大而减小,浸金属碳有更好的耐磨性。使用扫描电镜对滑块的磨损形貌进行观察,结果表明:在一定范围内,随着振动幅值的增大,电弧对纯碳和浸金属碳2种滑块材料的烧蚀程度均加剧;纯碳滑块电弧侵蚀的表现形式为烧蚀坑和热应力裂纹,浸金属碳滑块电弧侵蚀的表现形式为犁沟、材料剥离和烧蚀麻点。关键词:振动幅值;摩擦;磨损;电弧中图分类号:TH117文献标志码:A文章编号:0254—0150(2015)09—025—05EfectofVibration
3、AmplitudeofPantographonTribologicalBehaviorofPureCarbonandMetal—impregnatedCarbonStripswithElectricCurrentChenWeiChenGuangxiongLiHongZhouPeiyong(StateKeyLaboratoryofTractionPower,TribologyResearchInstitute,SouthwestJiaotongUniversity,ChengduSichuan610031,China)Abstract:F
4、rictionandwearbehaviorsoftwofrictioncouples,thepurecarbon/copperalloycontactwireandthemetal—impregnatedcarbon/copperalloycontactwirewerestudiedexperimentallyonaring-·on-blockfrictionweartesterunderdif-ferentvibrationamplitudes.Thetestresultsindicatethatanapproximatesinus
5、oidalvibrationofthestripOccurscontinuous—ly.Thearcdischargepowerconsumptionoftwofrictioncouplesisfirstlyincreasedandthendecreasedwiththeincreasingofvibrationamplitude,andthepurecarbonstripeasilycreatesarcdischarge,whichhasahigherarcpowerconsumption.Thefrictioncoefficient
6、oftwofrictioncouplesisdecreasedwiththeincreasingofvibrationamplitude,andmetal-impregnatedcarbonhasgoodwearresistancethanpurecarbon.SEMobservationofthewornsurfacesofthestripsshowsthatarcerosionsofpurecarbonandmetal-impregnatedcarbonareaggravatedwithincreasingvibrationampl
7、itudewithinacertainrange.Ero—sionpitsandthermalstresscrackingsaretwomainarcerosionmechanismsofthepurecarbonstrip.Alargenumberoffur-rows,pittingsandspallinglayerscanbeobservedonthewornsurfaceofthemetal-impregnatedcarbonstrip.Keywords:vibrationamplitude;friction;wear;arc目前
8、,电气化牵引已经成为最广泛的铁路牵引方损的因素很多,如法向压力、速度、表面粗糙度、温式。在实际应用中,由于自然因素和材料因素,弓网度、电场等¨]。现阶段关于弓网振动因素对载流摩发生振动产生接触不连续的现象是
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