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Basic Research on Seal-less Centrifugal Blood Pump

无密封离心血泵的基础研究

基本信息

批准号：
07558251
负责人：
AKAMATSU Teruaki
金额：
$ 1.22万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07558251/
关键词：
Seal-less Pump Nutation Type Centrifugal Pump Centrifugal Pump with Magnetically Suspended Impeller Indirect Measurement of Flow rate and Pressure Prediction of Hemolysis Rotating fluctuation of Magnetically Suspended Impeller 磁気浮上式遠心ポンプ溶血特

项目摘要

We aim at improving the performance of seal-less centrifugal blood pumps (nutation on type and magnetic suspension type) as an artificial heart of next generation.I.Nutation Type : We replaced the nutating impeller by an undulating circular disc of double action in order to obtain the higher pressure at the lower rotational speed. The pump performance proved to be improved by narrowing the clearance between the edge of disc and the casing, and also by widening the inlet port of diaphragm side.II.Magnetic suspension Type : (1) Animal experiments verified that the present pump has endurance of more than one year. (2) Without flow meter and pressure transducers, the flow rate and pressure difference can be estimated from the measured motor current and the motor speed. (3) The stability of rotational impeller magnetically suspended was measured by Laser position sensers. This show that the radially straight vane is most stable. (4) By viewing from the same rotational coordinate as rotating impeller, the flow patterns in various kinds of impellers were revealed.III.Computational Flow Analysis : (1) Distribution of turbulent shear stress in the orifice were computed using the low Reynolds number turbulent model and then the threshold of shear stress for hemolysis were determined. (2) Flows around a nutating circular cylinder were analyzed by the discrete vortex method with diffusion velocit.

我们的目标是改善无密封离心血泵（章动式和磁悬浮式）作为下一代人工心脏的性能。I.章动式：我们用双作用的波状圆盘代替章动叶轮，以便在较低的转速下获得较高的压力。通过减小圆盘边缘与泵壳之间的间隙和加宽隔膜侧的进口，提高了泵的性能。二、磁悬浮式：（1）动物实验证明，本泵具有一年以上的使用寿命。(2)在没有流量计和压力传感器的情况下，可以根据测量的电机电流和电机速度来估计流量和压差。(3)采用激光位置传感器对旋转磁悬浮叶轮的稳定性进行了测量。这表明径向直叶片是最稳定的。(4)从与旋转叶轮相同的旋转坐标系出发，揭示了各种叶轮内部的流动形态。III.计算流场分析：（1）采用低雷诺数湍流模型计算了孔板内的湍流切应力分布，确定了产生溶血的切应力阈值。(2)本文用带扩散速度的离散涡方法分析了章动圆柱的绕流。