液圧駆動システムにおける液柱分離を伴う流体過渡現象 : 第5報,油圧プレスの上死点反転時に発生する衝撃

概要

論文の詳細を見る
A generation mechanism is developed describing the shock accompanied with transient structural vibration and audible noise during the reversing cycle at the top-dead center of a hydraulic machine press, and a mathematical model is presented to predict the shock with good accuracy for practical use. Experiments were carried out on a small-sized model hydraulic system dynamically similar to a real machine in the 20-MN class. It is found that the shock is due to the surge pressure caused by the rejoining of a column separation produced at the main ram cylinder end of the prefill line and its intensity is nearly proportional to the magnitude of the surge pressure. The calculated values from the proposed mathematical model agree with the measured values of the surge pressure, cavitation duration following a column separation and movement of the main ram during the reversing cycle with errors within some 10% over a wide operation range.
社団法人日本機械学会の論文
1995-07-25