液压废钢剪平衡阀的改进

Improvement of Balance Valve of Hydraulic Scrap Shear

针对液压废钢剪剪台空载下行时压力大的问题 ,分析认为平衡阀的压降是影响差动回路功率特性的主要因素。为此 ,将先导溢流阀的溢流口接在低压回路上 ,以增加平衡阀主阀的开度 ,降低平衡阀的压差 ,改善差动回路的功率特性。改进后 ,剪台空载下行时的压力由 1 0MPa降为 1 .8MPa ,降低了回路阻力损失 。

Pointing to the problem of big pressure at the time of empty load and go down of hydraulic scrap shear stand, consider the pressure reducing of balance valve is important factor to influence power property of differential loop. So it can increase the aperture o f main gate of balance valve, reduce the pressure difference of balance valve and improve the p ower property of differential loop to connect nozzle of guiding overflow valve to low pressure lo op. After improved the pressure at the time of empty load and go down of shear stand is reduced fro m 10MPa to 1.8MPa, so the resistance loss of loop is decreased and the calorific capacity o f this system is reduced.