论文部分内容阅读
此项发明特别适用于机动工作机上的液压回路中。 在使用管道3中,压力油由压力流量发生器通过单向阀2输送。在工作管道3中,接有下限值的限压阀4和上限值的限压阀5。在压力流量发生器1输送开始时,首先充满液压存贮器6,这时限压阀4和5还没有供给信号,截止阀7保持关闭。当限压阀4的压力达到预先调好的压力时,在阀的出口出现一定体积液流,此液流到达截止阀9和节流阀10。因为在节流阀处,液压基本上比在限压阀4上的小,所以
This invention is especially suitable for use in hydraulic circuits on motorized working machines. In the use of pipe 3, pressurized oil is delivered by the pressure flow generator through check valve 2. In the working pipe 3, a pressure-limiting valve 4 of a lower limit and a pressure-limiting valve 5 of an upper limit are connected. At the beginning of the delivery of the pressure-flow generator 1, the hydraulic accumulator 6 is initially filled, at which point the pressure-limiting valves 4 and 5 are not yet supplied with a signal, and the shut-off valve 7 remains closed. When the pressure of the pressure-limiting valve 4 reaches the pre-set pressure, a certain volume of liquid flow appears at the outlet of the valve, and this flow reaches the stop valve 9 and the throttle valve 10. Because at the throttle, the hydraulic pressure is basically smaller than the pressure limiting valve 4, so