高速铁路电弧灼伤钢轨和绝缘节问题研究

Research on Reducing Burn of Insulated Rail Joints by Electric Arcs on High Speed Railways

现场采集切断点处("一头堵")绝缘节两端的电压、电流和电弧录像,对电弧的特征和机理进行研究,详细分析影响电弧的四个要素、五个地面场景因素。发现降低动车组牵引电流和切断点绝缘节两端电压、切断点连通、低牵引等级、绝缘节厚度大于轮轨接触踏面横向长度能减弱电弧对钢轨及绝缘节的灼伤。

Based on onsite collection of the videos of the voltage, current and electric arc at both ends of an insulated rail joint at the cut-off point, the paper provides a research on the features and mechanisms of electric arcs and analyzes in detail the factors that influence the arcs and the five trackside scenarios. It is found that the following methods can reduce the burn of insulated rail joints by electric arcs, including lowering the traction current of EMU and the voltage of both ends of the insulated rail joint at the cut-off point, connecting cut-off points, adopting lower traction levels and applying insulated rail joints whose thickness is greater than the lateral length of the wheel-rail contact section.