ZK4型电空转辙机与ZK3-A型的比较

电空转辙机是铁路驼峰编组场主要的道岔转换设备,目前驼峰编组场使用的电空转辙机有 ZK3-A 型和 ZK4型两种机型,ZK3系列电空转辙机在八十年代初投入使用,虽经过多次改进,在使用中仍然存在一系列问题,正在逐步被 ZK4型电空转辙机所替代。     

ZS224开关电源输入滤波器的电磁兼容性设计

对ZS224开关电源在实际使用时存在的电磁兼容性问题进行了分析,提出并讨论了改进方法,引入了一种非常简便的滤波器计算方法。试验验证该设计计算方法切实可行。     

Design optimisation of switch rails in railway turnouts

Inspired by a manufacturing process of switch rails for railway turnouts, a method for the optimisation of switch rail profile geometry is presented. The switch rail profile geometry is parameterised with four design variables to define a B-spline curve for the milling tool profile, and two design variables to prescribe the deviation from the nominal vertical path of the milling tool. The optimisation problem is formulated as a multi-objective minimisation problem with objective functions based on the contact pressure and the energy dissipation in the wheel–rail contact. The front of Pareto optimal solutions is determined by applying a genetic type optimisation algorithm. The switch rail profile designs are evaluated by simulations of dynamic train–turnout interaction. It is concluded that the obtained set of Pareto optimal solutions corresponds to a rather small variation in design variables where increased profile height and increased profile shoulder protuberance are preferred for both objectives. The improvement in the objectives comes at the cost of an earlier wheel transition to the switch rail and thus increased vertical loading at a thinner rail cross-section. The performance of the optimised geometry is evaluated using a set of 120 measured wheel profiles, and it is shown that the optimised geometry reduces damage also for this large load collective. It is concluded that accurate limits on switch rail loading need to be established to determine the feasible design space for switch rail geometry optimisation.     

窄轨电机车无触点司机控制器的设计

文章介绍了无触点窄轨电机车司机控制器的设计方案,该司机控制器采用槽型光电开关为初始信号发射源,产生的开关信号经过单片机处理后,通过光电耦合器送给变频器达到执行司机控制命令的作用,实践证明本设计大大提高了整个系统的可靠性。     

机车故障隔离开关切换控制装置

文章介绍了用于电力机车单司机操作的故障隔离开关切换控制装置的设计要求、技术参数、工作原理、型式试验及运行考核状况。     

关于38号道岔信号工程设计

结合京秦线双桥站更换38号提速道岔工程设计,介绍了关于38号道岔信号工程设计的要点,并提出了2点需要注意的问题.     

既有线有关大号码道岔的技术改造

以保障动车组行车安全,满足运输需要为基本设计原则,结合沪昆线潭岗站大号码道岔改造和动车组侧向通过的运输作业模式,对既有线关于满足大号码道岔侧通速度的列控系统设计方案进行了研究和阐述,具体解决方案在工程实践中得到成功应用.     

《汽车电器与电子设备》教学方法的思考

通过"线圈加铁心"和"线圈加开关"这两句话,分析汽车电器课程中的电源系、起动系和点火系的相互联系,用启发式的教学方法把这3部分的内容展现给学生,激发学生的学习兴趣,以达到良好的教学效果。     

提速道岔1DQJ电路混线实例分析及改进

对提速道岔1DQJ电路中存在的问题进行分析，并提出相应的改进建议。     

到发线中间出岔闭环电码化电路分析与改进

针对带有中间出岔的股道闭环电码化电路,存在当办理至该股道的下行（上行）接车进路,列车顺序占用各区段,经机车摘挂作业后,再次办理该股道的上行（下行）发车进路时,中间出岔股道的3个区段的QMJ无法正常励磁,造成发码通道被切断,机车信号收不到码的问题,提出可行的电路修改方案予以解决。