液压防折弯系统对有轨电车曲线通过性能影响研究

Influence of Hydraulic Anti-kink System on Curving Performance of Tram

依据有轨电车液压防折弯系统工作原理,基于流量连续性方程和力平衡方程,并详细考虑缓冲阀工作状态判断依据,建立有轨电车液压防折弯系统动态模型,分析液压防折弯系统的动态响应特性。基于液压防折弯系统动态模型,建立考虑液压防折弯系统的四模块单车型独立轮对低地板有轨电车协同仿真动力学模型,研究液压防折弯系统对有轨电车曲线通过性能的影响。结果表明,与传统无液压防折弯系统的有轨电车相比,安装液压防折弯系统可使车辆同一单元内前、后模块车体的摇头角趋于一致,同时有效减小车辆最大摇头角及横向偏移量;防折弯系统控制液压缸作用力不同,前车靠近导向轮一侧控制液压缸作用力最大;液压防折弯系统改善车辆曲线通过性能,提高整个车辆的安全性。

According to the action principle of tram hydraulic anti-kink system, based on the flow continuity equation and force balance equation, and considering the judgment basis for the working condition of the buffer valve in detail, a dynamic model of the tram hydraulic anti-kink system is established, and the dynamic response characteristics of hydraulic anti-kink system is analyzed. Based on the dynamic model of hydraulic anti-kink system, the collaborative dynamics simulation model of the tram with 4 modular single carbodies and independently rotating wheels and the hydraulic anti-kink system is established to investigate the influence of the hydraulic anti-kink system on the running performance of tram. The results indicate that: compared with the traditional tram without hydraulic anti-kink system, the installation of hydraulic anti-kink system can make the carbody yaw angle of the front and rear modules in the same unit of the tram tend to be consistent, and effectively reduce the maximum of carbody yaw angle and lateral offset of the tram;the forces applied on anti-kink control cylinders are different and the maximum of the forces is on the control cylinders closed to guide wheel of the front module;hydraulic anti-kink system improves the curving performance and increases safety of the whole tram.