Basic Studies on the Application of Rotary Pump for Power Sprayer

Abstract

It is the purpose of this study to find out whether the rotary pump is applicable to power sprayer.
The hydraulic vane pump was used at the expe-riment. We carried out the several experiments on the volumetric efficiencies, torque efficiencies and over all efficiencies of the vane pump used hydr-aulic oil (heavy medium), spindle oil (Spinox 2S) or water, and obtained the following results.
(1) The volumetric efficiencies, torque efficiencies and over-all efficiencies of this pump were expre-ssed by the equations (6), (9) and (10) respectively.
(2) The experimental values almost coincided with the values calculated from the equations (6) (9) and (10).
(3) The volumetric efficiencies and the over-all efficiencies of this pump used spinox 2S or water were lower than those used heavy medium, but no significant difference in torque efficiencies was found between the three kinds of fluids.
(4) In order to raise the volumetric efficiencies of this pump when using low viscosity fluids (spi-nox 2S, water), it is necessary to reduce the lea-kage loss.
(5) Many experiments are necessary in addition to this experiment to apply rotary pump for power sprayer.