ポペット形油圧弁におけるキャビテーション現象と弁特性 : 第2報,弁座面取長さの影響と流量特性

概要

論文の詳細を見る
The influences of the chamfer length of the valve seat on the flow performance and the cavitation phenomena of a oil hydraulic poppet valve were studied experimentally using the half cut model. It was made clear that the discharge coefficient became largest when the ratio of the chamfer length (S) and the restriction height (h) was a specific value in almost 1≦S/h≦3 in case of diverging flow, and S/h≦1in case of converging flow, when the valve lift X and Reynolds' number R_e were constant. The critical cavitation number Kc also became largest at the same S/h as above. In case of diverging flow having chamfer length S=(1〜2.5)h, the periodic flow turbulence occured at the metering restriction under some pressure conditions. And the unusual sound noise like as whistling occured with the sympathetic vibration of the oil column in the pipe line.
一般社団法人日本機械学会の論文
1985-02-25