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时间:2020-04-24
《重载货车作用下固定辙叉心轨磨耗分析-论文.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、第36卷第7期铁道学报V01.36NO.72014年7月JoURNAL0FTHECHINARAILWAYS0CIETYJuly2o14文章编号:1001—8361(2014)07—0030—06重载货车作用下固定辙叉心轨磨耗分析于淼,张军,鹿广清,马贺(1.大连交通大学交通运输工程学院,辽宁大连116028;2.中铁山桥集团有限公司,河北秦皇岛066205)摘要:针对大秦铁路75kg/m钢轨12号高锰钢固定辙叉心轨处的磨耗问题,基于Kalker简化理论,建立车辆一道岔系统动力学模型。分析比较重载Cs。型货车侧向通过道岔辙
2、叉区时,不同车轮和道岔型面匹配下的轮轨蠕滑力、轮轨接触斑面积、车轮滚动圆半径与车轮磨耗功率间的关系以及轮轨型面匹配程度和变化规律。结果表明:当车辆从翼轨行进到心轨时,其标准车轮滚动圆半径的突变值在4~5mm之间,相对于标准车轮,磨耗车轮的值降低了5O,对心轨的垂向冲击较小;轮对由翼轨过渡到心轨时,其左右磨耗车轮的滚动圆半径差值小于标准车轮,磨耗车轮的纵向蠕滑力相对标准车轮减低了45~63;磨耗功率大小与车轮滚动圆半径以及轮轨型面匹配程度有关。关键词:重载货车;固定辙叉;心轨磨耗;滚动圆半径;轮轨型面中图分类号:U213.
3、6.2:U270.1文献标志码:Adoi:10.3969/j.issn.1001-8361.2014.07.005AnalysisonWearofUnmovableFrogNoseRailundertheActionofHeavy—-haulFreightCarYUMiao,ZHANGJun,LUGuang—qing,MAHe(1.SchoolofTrafficandTransp0rtation,DalianJiaotongUniversity,Dalian116028,China2.ChinaRailwayShanha
4、iguanBridgeGroupCo.,Ltd.,Qinghuangdao066000,China)Abstract:ForanalysisonwearofNo.12highmanganesesteelunmovablefrogwith75kg/mrailusedontheDatong—QinhuangdaoHeavy-haulRailwayLine,thevehicle—turnoutdynamicmodelwasestablishedaccordingtothesimplifiedKalkertheory.There
5、lationshipsandchanginglawofcreepforces,contactspotareasandfric—tionpowerwereanalyzedcorrespondingtothesituationwhentheC8oheavy—dutywagonpassedthecrossingar—eafromthelateralsideunderdifferentwheel—railmatchingandtheirfurtherrelationshipswiththechangingrollingcircl
6、eradiusandwheel—railmatchingdegreewerestudied.Theresultsindicateasfollows:Therollingradiusmutationvalueofthestandardwheeloccurringaftertransitionfromwingrailtonoserailisintherangeof4~5mmwhilethatofthewornwheeliSreducedby50andhaslessverticalimpactonthenoserail;aft
7、erthewheel—setundergoestransitionfromwingrailtonoserail,therollingradiusdifferenceoftheleftandrightwornwheelsissmallerthanthatofthestandardwheels,SOthelongitudinalcreepslidingforcesofthewornwheelsarereducedby45~63relativetothestandardwheels;themagnitudeoffriction
8、powerisrelatedtotherollingcircleradiusandthewheel—railmatchingdegree.Keywords:heavy—haulfreightcar;unmovablefrog;wearofnoserail;rollingradius;wheel—railprofile
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