流量変動を受ける動圧浮上血液ポンプの動特性と安定性(流体工学,流体機械)

概要

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In this paper, we describe the stability of a centrifugal blood pump with hydraulic levitating bearings in pulsatile flow, since the ventricular assist device (VAD) set downstream of heart is affected by the pulsation. The test pump was developed for VAD using conical spiral groove bearings. The flow through the pump was excited from 0.25 to 3.0Hz by oscillator driver in the circulatory system. The rotational speed, flow rate, total pressure rise and displacement of rotor from casing center were measured to study stability of test pump. The stability test was done for the whirling motion of impeller and the conditions for stability of the blood pump were determined by the dynamic characteristics test. The results showed increasing whirling motion with increasing fluctuating frequency.
社団法人日本機械学会の論文
2009-01-25