MT-2缓冲器初压力理论计算
马磊,王自力
(西南交通大学 牵引动力国家重点实验室,四川 成都 610031)
摘要:通过分析MT-2缓冲器在装车以后缓冲器各主要元件位移量间的几何关系,并推导此缓冲器阻抗力计算公式和结合落锤实验数据,得出其初压力的理论计算公式,并反推静摩擦系数、分析几何接触角对初压力的影响。研究发现,考虑复原弹簧力与否所得出的初压力是有一定差距的。在精确计算初压力时,最好把复原弹簧力考虑在内。不论是否考虑复原弹簧力,初压力都分别随静摩擦系数、各几何接触角的增加而增加。另外,各几何接触角对初压力的影响是不同的。
关键词缓冲器;理论计算;初压力
中图分类号:O31          文献标识码:A            文章编号:10060316 (2012) 100017-05
Theoretical calculation of initial pressure of MT-2 draft gear
MA Lei,WANG Zi-li
(Traction Power State Key Laboratory , Southwest Jiaotong University , Chengdu 610031, China )
Abstract:The geometric relationships among the displacements of MT-2 draft gear’s main parts after its installation are calculated ,and its impedance forces formulas are deduced ,combined with drop hammering experimental data, theoretical calculation formulas of its initial pressure are provided and inverse method is adopted to calculate static friction coefficient and the effect of geometric contact angle on initial pressure is discussed .The results show that there is a certain gap between initial pressure with release spring force and that without release spring force. It’s better to take release spring force into account when accurate initial pressure is required.Whether release spring force is considered or not, initial pressure increases with static friction coefficient and geometric contact angle respectively. In addition, the effect of geometric contact angle on initial pressure is different.
Key wordsdraft geartheoretical calculationinitial pressure

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收稿日期:2012-03-10
作者简介:马磊(1987-),男,山东邹城人,硕士研究生,主要研究方向为列车纵向动力学;王自力(1963-),湖北老河口人,副教授,主要研究为列车纵向动力学、列车优化与操纵等。

 

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