Thus, Calculating the critical rotational speed of the helix ditching machine.
由此，推导出立轴柱形变螺距螺旋开沟机的临界转速。
The critical rotational speed of multiple plate structure is up to one time higher than that of general structure.
与普通结构比较，多层结构的允许转速提高一倍多。
Through changing the structural parameters of the principal axis system, we can obtain the effect of each parameter on the critical rotational speed.
并针对立轴系统各结构参数的改变，得到了分离机立轴系统各结构参数对其临界转速的影响。
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