电气化铁路接触网软横跨定位器、悬吊滑轮电气烧损原因与对策

针对5起接触网软横跨牵引电流分流烧损定位器、悬吊滑轮故障进行分析研究。采用模拟电力机车在不同位置取流的方法,按照电路学原理,结合各自设备特性进行分析,找出各自产生分流的原因,并分别制定对策,实施后均收到良好效果。将5起故障原因进行综合分析,找出共同的根源性原因,即主导电回路不完备。为了解决此类问题,提出一项校验主导电回路完备性的原则,供设计、运营人员参考使用。

Causes and Countermeasures for Electric Burn-down of Headspan Suspension Steady Arm and Suspension Pulley of Electrified Railway Overhead Contact System

This paper focuses on five failures of headspan suspension in overhead contact system due to dispersion of traction current of headspan suspension that burns down the steady arm and suspension pulley. By simulating the electric locomotive collecting current at different locations,these failures are analyzed to trace the causes for the dispersion according to the principle of electric circuit and the characteristics of each device. Countermeasures are formulated and implemented with good results.Comprehensive analysis of these five failures is conducted to find out the common causes and it is the insufficiency of the main circuit that proves to be the very cause for the failures. In order to solve this kind of problem,the author proposes the principle for inspecting the insufficiency of the main circuit,which may provide reference for designers and operators.