铁路货车轴端发电机技术研究

Research on Technology of Railway Freight Car Shaft End Generator

在我国铁路货车重载提速的背景下,采用电空制动、智能电子监测及运行安全在线监测的需求日益突显。但是受我国铁路货车运用维护体制制约,既有车辆均未安装供电装置,致使电子设备无法应用。因此提出一种安装于车轴端部的轴端发电机技术解决方案,但由于车轴端部冲击振动大、发电机体积限定要求高、发电机轻量化要求高、外部环境恶劣、温升要求苛刻、可靠性要求高等难点,严重制约了轴端发电机的应用。文章针对以上轴端发电机开发中的难点,通过电磁-热-结构多物理场仿真,定转子高防护等级结构设计,研制了一款轴端发电机,并完成了样机试制。通过轴端发电机试验平台的搭建,完成了样机型式试验及滚动台试验,试验结果满足要求。

Under the background of speed-up and heavy load of railway freight car in China, the demand for electro pneumatic braking, intelligent electronic monitoring and on-line operation safety monitoring is increasingly prominent. However, restricted by the operation and maintenance system of China’s railway freight car, the existing vehicles are not equipped with power supply devices, resulting in that the electronic equipment cannot be applied. A technical solution for the shaft end generator installed at the end of the axle was put forward. However, due to the high impact vibration at the end of the axle, the high requirements of the generator volume and lightweight, the bad external environment, and the harsh requirements for the temperature rise and the reliability, the application of the shaft end generator would be seriously restricted. Aiming at the above difficulties in the development of shaft end generator, through electromagnetic-thermal-structure multi-physical field simulation and high protection level structure design of stator and rotor, a shaft end generator was developed, and the prototype trial production was completed. With the construction of shaft end generator test platform, the prototype type test and rolling platform test were completed, which met the requirements.