面向高速无油节能环保型流体机械技术的实际需求，重点对某一电磁轴承-空心轴-离心叶轮转子系统的支撑刚度、临界转速和叶轮强度进行了有限元分析。研究表明：该电磁轴承的支撑刚度为813000~7317000 N/m；在设计转速下，转轴为刚性轴，可采用刚性轴的电磁轴承控制方案，离心叶轮强度满足材料要求。%Aiming at the practical requirement of high speed, oil free, energy saving and environment conservation fluid machinery technology, this paper is focused on the supporting stiffness of magnetic bearing, the critical speed of rotor system and the strength of rotating impeller based on finite element method. The results show that the stiffness of the designed magnetic bearing ranges within 813 000~7 317 000 N/m. At the design speed, the rotor system is a rigid one and the electronic- magnetic control strategy for rigid shaft can be used. The stress of the centrifugal impeller meets the requirement of material strength.
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