In this paper, analytical method is utilized on calculation the first critical speed of the agitating shaft in a 300 t KR desulphurization station.Also investigate the reasons caused the violent lateral vibration, which are the operating speed approaching the first critical speed, and much bigger centrifugal force because of the abnormal slag accumulation on the blades.Next, Solutions are presented as follow, ①reduce the maximum operating speed, ②improve the whole rigidity of the lifting device, ③optimize the blades shape, ④optimize the agitator total height.%本文利用解析法计算某厂300吨级KR法脱硫站机械搅拌设备搅拌轴的一阶临界转速,分析出搅拌轴产生剧烈横向振动的原因,主要原因包括机械搅拌设备工作转速经常接近于一阶临界转速、搅拌桨经常出现异常结渣导致产生更大的离心惯性力等,针对这些原因提出相应的解决措施,措施如下:(1)降低最大工作转速;(2)提高升降小车整体刚度;(3)优化搅拌桨桨形;(4)优化搅拌桨总高度.
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