traction gear meaning in English

牵引装置

At one time complex structure and area of weariness crack ( including whole suspension hollow axis of swivel , half suspension adopted axletree , substituting holistic grinding steel wheels for wheel - hoop compounded wheels , different wheel - axletree structure of different locomotives , different transmission chamfer machining step of axletresses and driven traction gear etc . . ) centralizing make wave clutter and repeat to disturb recognition of real fault wave
同时，由于全悬挂空心轴、半悬挂抱轴承等复杂结构车轴的使用和整体碾钢轮陆续替代轮箍组装式车轮，各型机车轮轴结构不同，车轴加工台阶和过渡圆角不同，从动牵引齿轮与车轴采用过盈装配等，在这些结构复杂且疲劳裂纹产生集中的区域，探伤时极易发生波形交织和重复，难以识别真正缺陷波。