| 摘要 |
A peristaltic pump (1) has a flexible tube (2) extending around an inner oscillatory ring (3) and confined by an outer stationary ring. Drive means, e.g. a radial array of hydraulic or piezo-electric actuators, effects the movement of the inner ring (3) to induce peristaltic compression along the tube (2). Reinforcements in the radially-inner and outer portions of the tube wall confine distortion, extension, etc. of the tube to the radially-intermediate portions such that compression of the tube in one region positively induces a corresponding expansion in a diametrically opposite region of the tube and enhances suction at the inlet of the pump. In a relaxed state the tube has an elliptical profile so that compression of the tube induces expansion of the tube to a circular profile in the suction region of the pump.
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