一种轴流式磁悬浮血泵的结构设计及溶血预测

发布时间：2018-03-08 14:42

本文选题：血泵　切入点：轴流式　出处：《武汉理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：心衰是目前人类面临的主要心血管疾病之一,心脏移植虽然能有效治疗心衰,但供体缺乏。轴流式磁悬浮血泵作为心脏移植的替代品,能有效缓解心脏供体匮乏的问题。由于采用磁力使叶轮转子悬浮在泵体内,它具有无摩擦、无接触、无需润滑、能耗低、寿命长等优点。且其外形为管状,更适合植入人体,是目前血泵研究的热点之一血泵叶轮的稳定悬浮,是其正常、安全工作的前提,而叶轮结构直接影响着血泵流体动力学特性,是血泵满足人体生理需求的最基本条件。因此,磁力支承和叶轮结构是目前国内外轴流式磁悬浮血泵的主要研究内容。论文在归纳总结国内外血泵的研究基础上,设计了轴流式磁悬浮血泵的流道结构、磁力支承结构、位置检测结构,优化了叶轮结构,并提出了一种轴流式磁悬浮血泵的整体结构。基于ANSYS分析软件,设计了轴向永磁轴承和径向永磁偏置轴承的结构,通过优化布置磁路,最终使得小尺寸结构的血泵能够承受较大轴向载荷。结合人体生理需求,设计了叶轮结构,采用Fluent软件对血泵的泵腔流道进行流体仿真分析,讨论了叶片厚度、叶片高度、叶片进出口角度以及前、后导叶轮尺寸与血泵流体特性的关系,建立了轴流式磁悬浮血泵的溶血模型,并采用粒子追踪法对所设计的血泵进行了溶血预测。
[Abstract]:Heart failure is one of the major cardiovascular diseases that human beings are facing at present. Although heart transplantation can effectively treat heart failure, but donors are scarce. Axial flow magnetic levitation blood pump is used as a substitute for heart transplantation. Because the impeller rotor is suspended in the pump body by magnetic force, it has the advantages of no friction, no contact, no lubrication, low energy consumption, long life, and its shape is tubular, so it is more suitable for implanting human body. It is one of the hotspots of blood pump research. The stable suspension of blood pump impeller is the premise of its normal and safe operation. The impeller structure directly affects the hydrodynamic characteristics of blood pump and is the most basic condition for blood pump to meet the physiological needs of human body. Magnetic bearing and impeller structure are the main research contents of axial flow maglev blood pump at home and abroad. On the basis of summing up the research of blood pump at home and abroad, this paper designs the flow channel structure, magnetic support structure, position detection structure and impeller structure of axial flow maglev blood pump. The whole structure of an axial-flow maglev blood pump is presented. Based on ANSYS software, the structure of axial permanent magnetic bearing and radial permanent magnet offset bearing is designed. By optimizing the magnetic circuit, the blood pump with small size structure can bear large axial load. According to the physiological requirements of human body, the impeller structure is designed, and the fluid simulation analysis of pump cavity passage of blood pump is carried out by using Fluent software. The blade thickness, blade height, blade inlet and outlet angle and front are discussed. The hemolysis model of axial magnetic suspension blood pump was established by the relationship between the size of the back guide wheel and the fluid characteristics of the blood pump, and the hemolysis prediction of the designed blood pump was carried out by particle tracing method.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH789

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