プラネタリーギヤ型水圧モータの出力トルクに関する理論と実験の比較

概要

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Water hydraulic system which uses tap water as pressure medium has no risk to pollute the environment if leakage happens. It has also other many advantage; being non-toxic, non-inflammable, easy to obtain and dispose the fluid. Pumps, motors and valves have been designed and manufactured for use in relatively high pressure around 14MPa from early stage and used for industrial applications especially in food process machinery and so on. As comparing with it, low pressure water hydraulic components have been less progressed in development and manufacturing. Low pressure water hydraulic system has advantages; low cost, safe and easy usage. It has also a possibility to be driven directly by tap water network pressure. The goal of this study is to develop a low pressure water hydraulic motor, a planetary gear type water hydraulic motor, which can be driven by tap water network pressure easily. In this study the mechanism of torque generation is revealed theoretically, the theoretical torque is calculated and compared with experimental results to find a way to improve the out put torque characteristics. It is confirmed by the experimental results that a surface treatment with solid lubricant film on the planetary gears has good effect on improvement of the out put torque characteristics.
2010-01-31