客专线道岔曲股开通时长短心轨轨腰与顶铁间隙变化规律  

Variation Laws of Gap Between Long and Short Center Rail Waist and Top Iron During Opening of Curved Track of Passenger Dedicated Line

作　　者：蒋荣国 JIANG Rongguo(Turnout Branch,China Railway Construction Heavy Industry Corporation Limited,Zhuzhou Hunan 412005,China)

机构地区：[1]中国铁建重工集团股份有限公司道岔分公司,湖南株洲412005

出　　处：《铁道建筑》2024年第8期35-38,共4页Railway Engineering

摘　　要：道岔曲股开通时,可动心辙叉的长短心轨轨腰与顶铁间隙过大会对长短心轨组件的受力造成不利影响。采用有限元软件,对曲股开通时客专线12号、18号道岔长短心轨轨腰与顶铁的间隙进行模拟分析,研究间隙的变化规律,为厂内道岔组装执行TB/T 3307.1-2020《高速铁路道岔制造技术条件第1部分:制造与组装》标准提供理论参考。结果表明:有限元分析结果与厂内实测数据基本相符,采用有限元模拟可动心辙叉由直股到曲股开通时轨腰与顶铁的间隙变化情况是可行的。考虑客专线12号道岔长短心轨115#顶铁间隙曲股开通时变化超过了3 mm,建议对客专线12号道岔长短心轨结构进一步研究及优化。When the turnout is opened with a curved track,the excessive gap between the long and short center rail waist of the movable frog and the top iron will have a negative impact on the stress of the long and short center rail components.Using finite element software,simulation analysis was conducted on the gap between the long and short center rails and the top iron of the No.12 and No.18 turnouts of the passenger dedicated line during the opening of the curved track.The variation law of the gap was studied,providing theoretical reference for the assembly of turnouts in the factory according to TB/T 3307.1-2020 Technical Conditions for Manufacturing High speed Railway Turnouts Part 1:Manufacturing and Assembly.The results show that the finite element analysis results are basically consistent with the measured data in the factory,and it is feasible to use finite element simulation to investigate the gap changes between the rail waist and the top iron when the movable frog is opened from straight to curved track.At the same time,due to the change is over 3 mm in the gap between the 115#top iron of the long and short center rails of the No.12 turnout on the passenger dedicated line when it is opened,it is recommended to further study and optimize the structure of the long and short center rails of the No.12 turnout on the passenger dedicated line.

关 键 词：客专线道岔 有限元分析 曲股开通 长短心轨 顶铁 间隙 

分 类 号：U213.62[交通运输工程—道路与铁道工程]