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目前国内外水压机上应用的液压闸阀普遍遇到一个困难的技术问题,即在闸阀刚开启的瞬间,闸阀上下腔存在着很大的压力差,在此压力差作用下,高速流动的液体射向停止的水压机工作柱塞或关闭了阀门的主分配器,正如一股高速水流射向垂直壁面。根据动量定律在垂直壁面上将承受很大的轴向液动力,使水压机液压系统在液动力作用下产生强烈振动,甚至使管接头断裂脱开和水压机本体的严重晃动。特别是地处北方的工厂中,在冬季局部管道结冻,严重时会导致管道断裂的恶性事故。因此,如何消除液压
At present, the hydraulic gate valve used in hydraulic press at home and abroad generally encounters a difficult technical problem. That is, there is a great pressure difference between the upper and lower gate of the gate valve at the moment when the gate valve is opened. Under this pressure difference, the liquid flowing at high speed A stopped hydraulic press plunger or main distributor with the valve closed, just as a stream of high velocity water is directed toward the vertical wall. According to the law of momentum, a large axial hydraulic force will be exerted on the vertical wall so that the hydraulic system of the hydraulic press will generate strong vibration under the action of hydrodynamic force, even breaking the pipe joint and severely shaking the hydraulic press body. Especially in factories located in the north, local pipe freezing in the winter, serious pipe rupture will lead to a vicious accident. Therefore, how to eliminate the hydraulic pressure