轴向窜动就是指电机的轴在工作中沿轴线方向不可避免的微小移动。轴心方向就是轴的方向，垂直于轴心方向就是轴的圆柱面的方向。
齿轮套不得有轴向窜动。
磨体产生了轴向窜动，且窜动与磨机的冷热状态密切相关。
The grinding machine produces the movement of the oriented shaft, moreover, there is a close relationship between the movement and the grinding machine's sate of cold and hot.
介绍转筒干燥机的工作原理，结构特点及检修过程中轴向窜动的调整方法。
The working principle and the structure feature of rotary drum drier, and the way how to adjust axial displacement in service procedure are introduced.
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