1原因分析我段地处湖南湘西山区，自1991年全面使用东风4型机车担负湘黔线娄底至玉屏432km客货牵引任务以来，因运行区段具有坡道起伏大，弯道多且曲线半径小等特点，长期以来造成ZQDR－410型牵引电机（以下简称410电机）通风帆布卡变型、弯曲和脱落现象。通过对配属的64台机车 1 Analysis of the reasons I paragraph is located in the western Hunan mountainous areas, since the full use of Dongfeng 4 locomotive in Hunan and Hunan Province in 432 km to Yuping 432km passenger and cargo towing tasks since the running section with ramp ups and downs, more curves and curve radius Small and so on, has long caused ZQDR-410 traction motor (hereinafter referred to as 410 motor) ventilation canvas card variants, bending and shedding phenomenon. Through the associated 64 locomotives