城轨列车轮缘固态润滑系统设计与应用

Design and Application of Solid Rail Lubrication System for Urban Rail Train Rim

针对当前轨道列车轮缘润滑技术中常用的车载轮缘润滑、车载钢轨轮润滑两种方式存在油液喷涂润滑时轮缘根部承受高负荷、高温,导致液体油膜容易遭到破坏反使轮轨之间丧失润滑能力、黏着系数下降、轮对空转等问题,提出一种轮缘固态润滑方案。利用轮轨直线运行时摩擦因数较小,曲线弯道运行时摩擦因数较大的运行特点,基于多传感器信息融合的列车定位技术实现列车运行至曲线位置时进行重点润滑的控制。通过试验验证,系统达到了润滑膜较为稳定、避免液态润滑剂非预想迁移、润滑点位置精确控制等良好效果。

In view of the high load and high temperature on the wheel flange root during oil spray lubrication, which were commonly used in the wheel flange lubrication technology of the rail train at present, the liquid oil film was easy to be damaged, which results in the loss of lubrication ability between the wheel and rail, the decrease of adhesion coefficient, and the wheel set idling, etc., a solid-state lubrication scheme for the wheel flange was proposed. Based on the characteristics of small friction coefficient in straight line running and large friction coefficient in curve curve running, the train positioning technology based on multi-sensor information fusion realizes the control of key lubrication when the train runs to the curve position. Through the test, the system has achieved good results, such as relatively stable lubricating film, avoiding unexpected migration of liquid lubricant and precise control of lubricating point position.