Cavitation Phenomena and Performance of Oil Hydraulic Poppet Valve : 1st Report, Mechanism of Generation of Cavitation and Flow Performance

By using an unique half cut model of an oil hydraulic poppet valve, the cavitation phenomena were directly observed and the pressure distribution was measured in the metering restriction between the valve seat and the poppet surface. As a result of this research, the occurrence process of cavitation in a poppet valve and the effects of it on the flow performance were made clear. Also, the differences in a performance of cavitation between the diverging flow and converging flow were understood.