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洗車機（1.中車南京浦鎮車輛有限公司，江蘇 南京 210031；2.西南交通大學 牽引動力國家重點實驗室，四川 成都 610031）
摘要：介紹了一種用于城市軌道交通永磁直驅列車的柔性拖車轉向架，該轉向架采用了小軸距、小輪徑的設計方法。轉向架的構架采用“交叉板式”橫梁實現柔性，能提供較低的扭轉剛度和合適的抗菱剛度，適應線路不平順的能力更強。對構架進行強度計算和疲勞試驗之后，發現測試結果滿足標準要求。對拖車柔性轉向架的扭曲減載性能進行了測試，發現該轉向架的輪重減載率較傳統轉向架偏低。同時對拖車柔性轉向架的構架模態進行了測試，更加全面地掌握了該轉向架的特性。*終得到結論：該新型轉向架的各項指標均滿足設計和標準要求，滿足線路實際運用要求。
關鍵詞：洗車機；拖車轉向架；柔性構架；永磁直驅列車
中圖分類號：U270.33            文獻標志碼：A            doi：10.3969/j.issn.1006-0316.2022.02.004
文章編號：1006-0316 (2022) 02-0022-08
Study on Flexible Trailer Bogie for Urban Rail Transit
MA Xiaoguang1，XIAO Yao1，JIN Xiongfeng1，WANG Kang2
( 1.CRRC Nanjing Puzhen Co., Ltd., Nanjing 210031, China; 2.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China )
Abstract：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.
Key words：trailer bogie；flexible frame；permanent magnet direct-drive train