论文部分内容阅读
三、分配阀的开启力分配阀的卸压原理如图5所示,进水腔压力为p_a、主阀上腔压力为p_b、主阀下腔压力为p_c。当阀处于关闭状态,p_b与p_a相同,p_c为低压管道压力。这时,主阀在p_b合力作用下,以很大力量压在阀座上,要开启主阀十分困难。为此,在主阀内部增加一个或多个卸压阀。卸压阀的开启力量较小。当卸压阀用外力(凸轮、摇杆、直接顶缸)开启后,p_a腔的压力液体经节流孔和卸压阀流向主阀下腔,
Third, the distribution valve opening force distribution valve pressure relief principle shown in Figure 5, inlet cavity pressure p_a, the main valve cavity pressure p_b, the main valve cavity pressure p_c. When the valve is closed, p_b is the same as p_a and p_c is the pressure of the low pressure line. At this time, the main valve in p_b synergy, with a great force on the valve seat, to open the main valve is very difficult. For this purpose, one or more pressure relief valves are added inside the main valve. Pressure relief valve opening force smaller. When the pressure relief valve with external force (cam, rocker, direct top cylinder) is opened, p_a cavity of the pressure liquid flows through the orifice and pressure relief valve to the lower chamber of the main valve,