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血泵的出现为治疗心衰提供了一种新的途径。针对第二代血泵中使用的机械轴承摩擦大,第三代血泵中使用的磁悬浮轴承导致血泵体积难以缩小、功耗大的问题,提出了一种血流动压和Pivot轴承相叠加的支承方式,减小结构,便于植入人体。利用计算流体动力学对轴流式血泵的关键参数进行优化,对优化后的血泵进行仿真分析和溶血预测。加工出血泵并搭建体外循环实验平台进行血泵水力特性测试。结果表明所提出的Pivot支承具有摩擦小,体积小的特点,能较好的解决现有血泵的问题。
The emergence of blood pump provides a new way to treat heart failure. For the second generation of large mechanical bearings used in blood pump friction, magnetic bearings used in the third generation of blood pump lead to difficult to reduce the size of the blood pump, power consumption, put forward a blood pressure and Pivot bearing superimposed Support, reduce the structure, easy to implant into the human body. The key parameters of axial flow blood pump were optimized by computational fluid dynamics, and the optimized blood pump was simulated and hemolysis predicted. Hemorrhagic pumps were processed and an extracorporeal circulation experimental platform was set up to test the hydraulic characteristics of blood pumps. The results show that the proposed Pivot bearing with small friction, small size, can better solve the existing blood pump problems.