Pressure control valve
    3.
    发明授权
    Pressure control valve 失效
    压力控制阀

    公开(公告)号:US5174328A

    公开(公告)日:1992-12-29

    申请号:US752554

    申请日:1991-09-11

    IPC分类号: F16K17/04 F16K17/10 G05D16/04

    摘要: In a pressure control valve having a valve body (1), a pilot poppet (7) is so mounted in the body (1) as to permit/prevent communication between a low-pressure relief port (12) and a back-pressure chamber (5), while moderated and stabilized in its opening operation so as to realize a steady relief flow of the valve, which flow depends on relief-flow properties of a relief poppet (4) so provided as to permit/prevent communication between: a pressure supply port (2); and a relief port (3). A piston poppet (8) is slidably mounted in the relief poppet (4) to extend to the back-pressure chamber (5). A cross-sectional area of the piston poppet (8) is larger than an opening area of a seat portion (6a) of a passage (6) in which the pilot poppet (7) is inserted. An annular opening area (defined between: a part of a surface of the passage (6), which part extends from the seat portion (6a) to the back-pressure chamber (5); and a surface of the pilot poppet (7) facing the part) gradually reduces in cross section to form a throttle area (11).

    摘要翻译: PCT No.PCT / JP90 / 00358 Sec。 371日期1991年9月11日 102(e)1991年9月11日PCT 1990年3月16日PCT公布。 出版物WO90 / 10811 1990年9月20日。在具有阀体(1)的压力控制阀中,先导式提升阀(7)安装在主体(1)中,以允许/防止低压释放端口(12) )和背压室(5),同时在其打开操作中调节和稳定,以便实现阀的稳定的释放流动,该流量取决于如此提供的释放提升阀(4)的释放流特性, 允许/防止通信:压力供应端口(2); 和释放口(3)。 活塞提升阀(8)可滑动地安装在凸轮提升阀(4)中以延伸到背压室(5)。 活塞提升阀(8)的横截面面积大于其中插入有先导提升阀(7)的通道(6)的座部(6a)的开口面积。 一个环形开口区域(限定在:通道(6)的表面的一部分,该部分从座部分(6a)延伸到背压室(5);以及导向提升阀(7)的表面, 面对部分)在横截面中逐渐减小以形成节流区域(11)。