轻轨转向架分离设备液压升降平台的改进

轻轨转向架分离设备液压升降平台作为轻轨车辆的检修维护设备,已在重庆市轻轨二号线中投入使用,经过一段时间使用,发现该升降平台存在基准面对位精度差的缺陷。针对该液压升降平台对位精度不足的问题,在充分吸收原有设备优点的基础上,采用带位置检测的液压缸和比例阀来替代原液压系统中所采用的三级油缸和普通电磁换向阀,同时运用闭环同步控制技术,完善了该液压系统的同步控制策略,对该升降平台液压系统进行了优化改进。研究结果表明,改进后该液压升降平台的沉降梁基面与水泥地面梁基面对位精度达到水平错位小于2 mm,左、右错位小于3 mm,对位精度满足该设备的设计性能要求,可实现该液压升降平台的高精度、平稳和可靠运行,可为轻轨车辆连续运营提供可靠保证。

Improvement on hydraulic lifting platform of light rail bogie separation equipment

Aiming at poor positional error problem arisen in the course of using the hydraulic lifting platform （a kind of bogie separation devices has been employed in the light rail No.2 line of Chongqing Municipality as the key maintenance equipment for light rail vehicles） , a set of corresponding solutions were introduced to improve the hydraulic system of the lifting platform, the advantages of original system were retained, hydraulic cylinders with position detection and proportional valves and the closed loop synchronous control technology were used in the improved system, the multi-stage hydraulic cylinders and ordinary electromagnetic valves in the original hydraulic system were replaced. The results indicate that the horizontal plane positional error between the lifting beam and the track beam is less than 2 mm, the side plane positional error is less than 3 mm after the improvement, the lifting platform could run smoothly in a reliable status with high accuracy, ensure the continuous operation of the light rails.