ポペット形油圧弁のキャビテーション特性 : 続報,圧力変化率の違いによる臨界キャビテーション係数

概要

論文の詳細を見る
This paper deals with an experimental study on the unsteady cavitation performance in the convergent flow of an oil hydraulic poppet valve. Experiments are carried out under two kinds of flow conditions : one is an unsteady flow in which the valve inlet pressure, p_1, takes the form of a trapezoid varying with time and keeping the outlet pressure, p_2, constant ; the other is the flow in which the former p_1 and p_2 are interchanged, respectively. It is found that as the absolute value of the rate of pressure change dp_2/dt increases, the incipient cavitation number, k_<ci>, shows a tendency to decrease, and the desinent one, k_<cd>, shows a tendency to increase under all geometric parameters in this test. As the absolute value of dp_2/dt further increases, the hysteresis between k_<ci> and k_<cd> becomes larger for each combination of the valve and valve seat.
一般社団法人日本機械学会の論文
1988-07-25