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人工心脏泵要求体积小、质量轻、功耗低。为契合上述要求,实现人工心脏泵转子的五自由度全悬浮,采用径向永磁轴承和轴向电磁轴承相结合的磁悬浮系统,在对轴流式人工心脏泵转子受力分析的基础上,提出了低功耗和单轴向电磁轴承这两种磁悬浮轴承系统结构设计方法,给出了采用这两种方法进行结构设计时,径向永磁轴承和轴向电磁轴承的设计原则。比较来看,采用单轴向电磁轴承结构设计方法虽然会增加电磁轴承的功耗,但是大大降低了系统的体积和质量;简化系统结构和电磁轴承的控制复杂性,更具优势。根据单轴向电磁轴承设计方法,设计并加工一台轴流式磁悬浮人工心脏泵原型机,成功实现转子的五自由度稳定悬浮,验证了所提方法的可行性,为磁悬浮人工心脏泵的结构设计提供参考依据。
Artificial heart pump requires small size, light weight, low power consumption. In order to meet the above requirements, the five-degree-of-freedom full-suspension of artificial heart pump rotor is realized. Based on the magnetic suspension system combining radial permanent magnet bearing and axial electromagnetic bearing, on the basis of axial force analysis of axial-flow artificial heart pump rotor, The design methods of two kinds of magnetic bearing systems with low power consumption and uniaxial electromagnetic bearing are put forward. The design principles of radial permanent magnet bearing and axial electromagnetic bearing are given when using these two methods. In contrast, the use of single axial electromagnetic bearing structural design method will increase the power consumption of the electromagnetic bearing, but greatly reduce the volume and quality of the system; simplify the system structure and control complexity of the electromagnetic bearing, more advantages. According to the design method of single axial electromagnetic bearing, an axial flow magnetic suspension artificial heart pump prototype is designed and processed, and the rotor’s five degrees of freedom stable suspension is successfully achieved. The feasibility of the proposed method is verified. The structure of the magnetic suspension artificial heart pump Design provides a reference.