Discharge and Non-Dimensional Parameters of Fluid Flows in Throttles of Spool Hydraulic Valves of Electro Hydraulic Amplifiers

This article describes the experimental study of fluid flows (discharge coefficient and Reynolds number) of intake and exhaust throttles of rectangular and segmented shape for spool hydraulic valves of electro hydraulic amplifiers with thimbles. The basis for this study is the Buckingham π theorem in dimensional analysis and the method for determining the flow parameters offered by the author. The experimental installation allowed us to estimate the pressure parameters of discharge and exhaust chambers, spool hydraulic valves, spool plunger movements and fluid discharge at the exits of the working and exhaust chambers. By analyzing the experiential data with computer software the author determined the angles of efflux and non-dimensional parameters of fluid flows. The paper offers iteration scheme to calculate non-dimensional parameters of fluid flows in throttles for spool hydraulic valves of electro hydraulic amplifiers with thimbles.

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