中低速磁浮牵引车的轴重转移研究

Research on axle load transfer of low-medium speed maglev tractor

为了研究中低速磁浮牵引车的轴重转移情况,推导了磁浮牵引车的轴重转移理论计算公式,得到了准静态工况下磁浮牵引车的轴重转移结果。同时,通过磁浮牵引车的动力学模型,分析了不同因素对磁浮牵引车轴重转移的影响规律。对比2种方法在理想工况下得到的轴重转移结果,两者差异比较小,说明动力学方法能够用于评估牵引车的轴重转移情况。基于动力学方法得到的轴重转移结果表明,牵引点高度越高,磁浮牵引车的黏着利用率越低,当牵引点高度高于车钩高度时,这种趋势更明显;车体纵向偏载对黏着利用率的影响非常大,最佳的控制范围不大于0.1 m;一系悬挂系统的布置方式应采用轴箱弹簧对称布置的悬挂系统或转臂朝向一致的转臂式悬挂系统;磁浮牵引车悬挂系统的垂向刚度对黏着利用率的影响很小。

In order to study the axle load transfer of low-medium speed maglev tractor,the theoretical calculation formula of axle load transfer of maglev tractor was derived,and the axle load transfer results of maglev tractor under quasi-static condition were obtained..At the same time,through the dynamic model of maglev tractor,the influence rule of different factors on the axle load transfer of maglev tractor was analyzed.By comparing the axle load transfer results obtained by the two methods under ideal working conditions,the difference is comparatively small,it shows that the dynamic method can be used to evaluate the axle load transfer of tractor.The results of axle load transfer based on dynamic method show that:the higher the traction point height is,the lower the adhesion availability of maglev tractor,and this trend is more obvious when the height of traction point is higher than that of couplers;the longitudinal partial load of car body has a great influence on adhesion availability and the best control range is less than or equal to 0.1 m;the arrangement of primary suspension system shall adopt the suspension with symmetrical axle box spring arrangement or the rotating arm positioning suspension system with consistent orientation;The vertical stiffness of suspension system of maglev tractor has little effect on adhesion availability.