人工肾脏泵用磁悬浮轴承设计与磁力特性分析  

Design and Magnetic Force Characteristic Analysis of Magnetic Levitation Bearing for Artificial Kidney Pumps

作　　者：金俊杰[1] 王岩峰 徐程程 陆文轩 张晓友 孙凤[1] 徐方超[1] JIN Junjie;WANG Yanfeng;XU Chengcheng;LU Wenxuan;ZHANG Xiaoyou;SUN Feng;XU Fangchao(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;Department of Mech-anical Engineering,Nippon Institute of Technology,Saitama 345-8501,Japan)

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870 [2]日本工业大学机械工学院,日本埼玉345-8501

出　　处：《西南交通大学学报》2024年第4期795-803,共9页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金(52005345,52005344);国家重点研发计划(2020YFC2006701);辽宁省教育厅项目(LFGD2020002);辽宁省“揭榜挂帅”科技重大专项(2022JH1/10400027)。

摘　　要：代替透析膜的持续离心分离新方法提高了依赖血液透析治疗的肾脏病患者生活质量,随之,人工肾脏泵的研究被很多学者关注.但传统人工肾脏泵采用滚动轴承进行支撑,存在溶血高、血栓率高等问题,为此,本文利用磁悬浮轴承的非接触、无润滑、高转速等优点,研发了一种应用于人工肾脏泵的结构紧凑且节能的单自由度控制型磁悬浮轴承.利用有限元分析软件进行仿真,探索径向被动控制部分和轴向主动控制部分的设计参数,并对总体进行仿真验证,进而对磁悬浮轴承进行结构性能评估.结果表明:仿真与实验的径向位移刚度系数分别为47.432 N/mm和49.531 N/mm,轴向电流刚度系数分别为0.144 N/AT和0.135 N/AT,轴向位移刚度系数为223.071 N/mm,满足该磁悬浮轴承的五自由度稳定悬浮要求;所设计的磁悬浮轴承简化了系统结构,减小了控制难度以及降低了系统功耗.The new method of continuous centrifugal separation instead of dialysis membrane has improved the quality of life of patients with kidney disease who depend on hemodialysis treatment.As a result,the research on artificial kidney pumps has been paid much attention by many scholars,but the conventional artificial kidney pump is supported by rolling bearings,and it thus causes problems such as high hemolysis and high thrombosis rate.In order to solve these problems,this paper developed a compact and energy-saving single-degree-offreedom controlled magnetic levitation bearing applied to an artificial kidney pump by using the advantages of non-contact,non-lubrication,and high rotation speed of magnetic levitation bearing.The finite element analysis software was used for simulation to explore the design parameters of the radial passive control part and the axial active control part,and the overall simulation was verified.Then the structural performance of the magnetic levitation bearing was evaluated.The results show that the simulated and experimental radial displacement stiffness coefficients are 47.432 N/mm and 49.531 N/mm;the axial current stiffness coefficients are 0.144 N/AT and 0.135 N/AT,and the axial displacement stiffness coefficient is 223.071 N/mm,which meet the requirements of five-degree-of-freedom stable suspension of this magnetic levitation bearing.The designed magnetic levitation bearing simplifies the system structure,reduces the control difficulty,and lowers the power consumption of the system.

关 键 词：人工肾脏泵 单自由度 磁悬浮轴承 有限元分析 

分 类 号：TH133.3[机械工程—机械制造及自动化]