一种轴流式血泵用磁悬浮支承系统设计及仿真.PDF

一种轴流式血泵用磁悬浮支承系统设计与仿真 [任永武] [武汉理工大学，430070] [ 摘 要 ] 植入式人工心脏泵（简称血泵），能够帮助人体血液循环，减轻心脏压力，为治疗心衰开辟了 一条有效的新途径。为进一步降低磁悬浮支承系统的能耗，减少发热，降低控制器复杂程度， 我们提出一种径向永磁轴承和轴向混合磁轴承相结合的磁悬浮支承系统。所设计的磁悬浮支承 系统的主动控制自由度只有一个，降低了控制系统的复杂性，血泵的整体体积减少，能够降低 功耗和发热。通过有限元软件 ANSYS 对径向永磁轴承和轴向混合磁轴承的支承特性进行分 析。研究结果表明：所设计的磁悬浮轴承在径向和轴向上刚度满足要求，能够将叶轮转子回复 到中心平衡处。本文能够为血泵磁悬浮支承系统的设计和优化提供理论依据。 [ 关键词 ] 支承特性 磁悬浮 血泵 轴流式 Design and Simulation of Maglev Support for Axial Blood Pump [Ren Yongwu] [Wuhan University of Technology, 430070] [ Abstract ] Although the maglev artificial heart pump (referred to as blood pump) can realize blood circulation, relieve stress on the heart, it has some problems which are reducing energy consumption of magnetic bearing, reducing heat, reducing the complexity degree of the controller. Therefore, this paper proposes a radial permanent magnetic bearing and axial hybrid magnetic bearing to support impeller rotor. Because of the support system has only one degree of freedom requires active control, which reduces the complexity of the control system, reduces the overall volume of blood pump, reduces power consumption and heat. Using finite element software ANSYS to analyze supporting characteristics of radial permanent and axial hybrid magnetic bearing. The results showed that the designed support system could meet the requirements in the radial and axial stiffness, can provide a theoretical basis for the blood pump magnetic bearing de