内接形トロコイドギヤポンプのマイクロ化に向けた実験的研究(流体工学,流体機械)

概要

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The pumping characteristics of an inscribed trochoid gear pump are investigated experimentally. The paper deals with viscosity-dominant conditions, i.e. low Reynolds number performances less than 5000 in order to develop a miniaturized pump. The test pump of 4 mm in the inner basic radius is designed for the experimentation. The volume flow rate and the pressure rise of the pump are measured using a test loop with two different liquids. Volumetric efficiency, dimensionless pressure rise, and pump's power efficiency are obtained as function of Reynolds number. The present results support the previous theoretical study, that is, the lower Reynolds number the higher performance the trochoid gear pump has. This implies an advantage toward miniaturization. On the other hand, the pump's power efficiency is obtained as only a few % because of significant increment of wear caused in six parts of gear clearance, which should be discussed as the next step of the research.
2006-02-25