磁気結合インペラを有する人工心臓用遠心ポンプのふれまわり運動に関する研究(流体工学,流体機械)

概要

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Non-contact bearing systems are often employed for rotary blood pumps to prevent blood coagulation at the stagnant regions inside the pump. These bearing systems do not have such sufficient regidity that the standard operational conditions usually exceed their critical speeds. In this study, we conducted measurements of the radial displacement of the impeller of the centrifugal blood pump developed as a left ventricular assist device to investigate the relationship between the whirling motion of the impeller and the working condition of the pump. The results indicated that the averaged center position of the impeller depends on the flow rates and that the ratio of teh whirling motion to the impeller rotation can be expressed as a function of the flow coefficient. It is also revealed that the flow from the impeller through the casing bottom toward the impeller center plays an important role in the whirling motion.
社団法人日本機械学会の論文
2008-07-25