货车大型化条件下驼峰峰高设计中难行车质量确定方法探讨

Quality determination method of hard rolling cars in height design of hump under large-size car developing condition

近年来,随着23 t轴重货车的应用,编组站在解体作业中出现驼峰偏高、超速连挂等不适应问题,降低峰高是编组站驼峰适应货车大型化发展的趋势.基于此,本文分析了驼峰设计的"三难条件(难行车、难行气候、难行线)",提出在驼峰选址及平面设计确定的条件下,"车辆因素"成为峰高设计的变化因素,并以此分析了既有驼峰设计规范中以总重30 t不满载关门窗的滑动轴承P50作为驼峰设计"难行车"的不合理性.在此基础上,给出了"基于三难条件出现概率"的"难行车"质量确定方法,并设置一定的"三难条件"出现概率,计算出相应的"难行车"质量,为峰高设计中"难行车"质量的确定提供参考.

In recent years,with the application of 23 t axle load freight cars,the marshalling at the hump yard shows adaptability problems such as the higher hump height and coupling over-speed in disassembly work,the paper points out that lowering the hump＇s height is a trend to adapt hump with the larger size development of the freight car.Based on this,the ＂three difficult conditions＂（＂hard rolling cars＂,＂difficult climate＂ and ＂difficult lines＂） in the design of hump is analyzed,and the ＂factor of cars＂ is considered to be the variational factor in the height design of hump when the location and graphic design of hump are determined,and the shortage of taking bearing P50 with a total weight of 30 t not fully loaded shutting windows as ＂hard rolling cars＂ is pointed out in the existing design criterion of hump.Based on this,a quality determination method of ＂hard rolling cars＂ based on ＂probability of three difficult conditions＂ is proposed.By setting a certain occurrence probability of ＂three difficult conditions＂,the quality of hard rolling cars is calculated which provides reference to determine the quality of hard rolling cars in the height design of hump.