某城市轨道交通车辆柔性拖车转向架的研制

Study on Flexible Trailer Bogie for Urban Rail Transit

介绍了一种用于城市轨道交通永磁直驱列车的柔性拖车转向架,该转向架采用了小轴距、小轮径的设计方法。转向架的构架采用“交叉板式”横梁实现柔性,能提供较低的扭转刚度和合适的抗菱刚度,适应线路不平顺的能力更强。对构架进行强度计算和疲劳试验之后,发现测试结果满足标准要求。对拖车柔性转向架的扭曲减载性能进行了测试,发现该转向架的轮重减载率较传统转向架偏低。同时对拖车柔性转向架的构架模态进行了测试,更加全面地掌握了该转向架的特性。最终得到结论:该新型转向架的各项指标均满足设计和标准要求,满足线路实际运用要求。

This article introduces a flexible trailer bogie for permanent magnet direct-drive trains in urban rail transit.The bogie adopts a design method of small wheelbase and small wheel diameter.The bogie frame adopts the"cross-plate"beam for flexibility,which can provide lower torsional stiffness and appropriate diamond stiffness,and has a stronger adaptability to line irregularities.After the strength calculation and fatigue test of the frame,it is found that the test results meet the standard requirements.The torsion load reduction performance of the trailer's flexible bogie is tested,and it is found that the wheel load reduction rate of the bogie is lower than that of the traditional bogie.At the same time,the frame mode of the trailer's flexible bogie is tested,and the characteristics of the bogie are more comprehensively grasped.Finally,it is concluded that all the indicators of the new bogie meet the design and standard requirements and meet the actual application requirements of the line.