机车车轴疲劳问题分析与对策

通过对机车车轴常见故障及车轴的疲劳问题进行探讨,对车轴的疲劳裂纹、疲劳强度进行分析,提出了在机车车轴设计,材料、工艺选择以及运用维护中应采取的对策。     

内燃机车柴油机振动烈度评定方法探讨

从机车在"0位"时柴油机晃动现象入手,对"柴油机振动烈度评定方法"进行了分析探讨。重点对测量点、测量参数计算、评定准则进行了阐述,重新提出了"柴油机振动烈度评定方法",同时给出了振动位移的控制值。     

HXD2型大功率交流传动电力机车车体

介绍了HXD2型大功率交流传动电力机车车体的结构特点、参数、主要部件的结构设计.     

轨道牵引辅助变流系统中变压器绝缘强度的研究

简述了电晕放电的产生机理,结合实际对HXD1电力机车130 kVA辅助变压器的绝缘结构进行了理论分析和计算,并用试验数据说明了绝缘结构的可靠性.     

重载铁路牵引供电方案与接触网载流能力的分析

针对重载铁路以及交流传动机车的特点,对新建重载铁路牵引供电方案与接触网载流能力的关系进行了细致的分析,逐步深入的介绍了重载铁路牵引供电方案设计的几个关键步骤,以及详细的计算方法,并提出了设计中应注意的问题。     

HXD2型大功率交流传动货运电力机车牵引电传动系统

介绍HXD2型大功率交流传动货运电力机车牵引电传动系统的电气原理、技术参数、性能特点和结构组成,对牵引电传动系统的各关键部件和装置组成进行了详细的功能描述。     

牵引模式对C0-C0架悬式机车粘着性能的影响

分析了牵引模式对C0-C0架悬式机车粘着性能的影响.通过对牵引装置不同布置方式进行比较,指出机车的轴重转移量以车体中央截面成对称分布,对应轮对上的粘着质量利用率之和为定值;并提出牵引点高度对机车粘着性能影响较大,而牵引装置布置方式对其影响较小,机车设计时需根据悬挂特性选择合适的牵引点高度.     

The effects of wheelset driving system suspension parameters on the re-adhesion performance of locomotives

In this study, in order to examine the effects of a wheelset driving system suspension parameters on the re-adhesion performance of locomotives, the stick–slip vibration was analysed according to theoretical and simulation analysis. The decrease of the slip rate vibration amplitude improved the stability of the stick–slip vibration and the re-adhesion performance of locomotives. Increasing the longitudinal guide stiffness of the wheelset and the motor suspension stiffness were proposed as effective measures to improve the re-adhesion performance of locomotives. These results showed that the dynamic slip rate was inversely proportional to the series result of the square root of the longitudinal guide and motor suspension stiffness. The larger the motor suspension stiffness was, the smaller the required longitudinal guidance stiffness was at the same re-adhesion time once the wheel slip occurred, and vice versa. The simulation results proved that the re-adhesion time of the locomotive was approximately proportional to amplitude of the dynamic slip rate. When the stick–slip vibration occurred, the rotary and the longitudinal vibrations of the wheelset were coupled, which was confirmed by train's field tests.     

Coupler jackknifing and derailments of locomotives on tangent track

A number of derailments occurred in recent years due to coupler jackknifing, some of them were reported on tangent tracks where conventionally thought to be the safer sections. This article studied coupler jackknifing behaviour and its implications for locomotive safety on tangent tracks from the experience of China heavy haul. Three types of coupler systems were modelled and simulated regarding coupler jackknifing behaviour. Two typical locomotive derailments occurred on tangent tracks were analysed. From the derailment experience, coupler angle self-lock behaviour was introduced and simulated. An approach to determine coupler angles in the jackknifed position was derived and validated with a self-coded program and SIMPACK. Methods to prevent coupler jackknifing were also evaluated with regard to locomotive stability.     

适用于中亚铁路的机车转向架设计

本文摘要介绍了中亚铁路的现状,提出了机车型谱平台搭建的概念,介绍了适用于中亚铁路的机车转向架的设计思路和结构特点。