公开(公告)号：EP0751449A1

公开(公告)日：1997-01-02

申请号：EP96304801.2

申请日：1996-06-28

申请人： Giant Industries, Inc.

发明人： Holder, Donald

IPC分类号： G05D16/10

CPC分类号： G05D16/10 ,  Y10T137/2599 ,  Y10T137/2605 ,  Y10T137/2642 ,  Y10T137/8733

摘要： A flow responsive pressure regulating unloader suitable for use between a positive displacement fluid pump and a fluid consuming device connected to the pump. The unloader includes a housing having an inlet port connected to an outlet port, and a by-pass port. A fluid pressure regulating valve is connected between the inlet port and the by-pass port to limit the maximum fluid pressure at the inlet port. A flow responsive valve also is connected between the inlet port and the by-pass port. Fluid flow from the inlet port to the outlet port creates a pressure drop across an orifice. The pressure differential is applied across a piston to close the flow responsive valve. When flow from the outlet ceases, the pressures across the piston become equal and the fluid pressure on the flow responsive valve opens the valve to divert fluid to the by-pass port.

摘要翻译： 适于在容积流体泵和连接到泵的流体消耗装置之间使用的流量响应性压力调节卸载器。 卸载器包括具有连接到出口端口的入口端口和旁路端口的壳体。 流体压力调节阀连接在入口和旁通口之间以限制入口处的最大流体压力。 流量响应阀也连接在入口和旁路口之间。 从入口到出口的流体流动在孔口上产生压降。 压差施加在活塞上以关闭流动响应阀。 当出口流动停止时，活塞两端的压力相等，流量响应阀上的流体压力打开阀门，以将流体转移到旁路口。