电力机车新型风道继电器的优化设计

风道继电器作为重要信号转换装置,在我国主力电力机车四大通风系统的七条风道中都安装使用。但目前广泛使用的膜片式风道继电器在使用中暴露出的寿命低,可靠性差,触头烧蚀和随机失效等问题和缺陷较普遍。经分析发现继电器触头烧蚀的根本原因是产生振频烧蚀。随机失效的原因是冰雪异物堵塞。针对以上缺陷设计了微压膜片与负逻辑微动开关结合的新结构继电器。并对进气口进行自洁防堵设计,对接线螺柱进行了新型接线夹紧螺旋结构设计。经过对继电器动触头的动态参数优化,得到了优化解,对触头弹性系数和几何结构参数的确定提供了依据。经实际装车验证,新型风道机电器解决了存在的缺陷和问题,各项性能指标优良,运行稳定可靠。

Optimization on the New Type Air Duct Relay in Electric Locomotive

Air duct relays,as an important signal conversion device,are installed in the seven wind tunnel of our four main ventilation system electric locomotive.However,the problems and deficiencies are more common with the widely used diaphragm air channel relays exposed in use,low life,poor reliability and random failure of the contact erosion.Through the analysis it is found that ablation of the root causes of relay contacts is vibration frequency ablation.Random failures are due to ice blockage.In response to th...