公开(公告)号：US3926210A

公开(公告)日：1975-12-16

申请号：US46027874

申请日：1974-04-12

Applicant: DANFOSS AS

Inventor： RASMUSSEN IVAR

IPC: F16K17/196 ,  F15B7/06 ,  F15B11/00 ,  F15B13/00 ,  F15B21/04 ,  F15B21/00

CPC classification number: F15B21/008 ,  F15B7/06 ,  F15B13/00 ,  Y10T137/7766 ,  Y10T137/87241

Abstract: The invention relates to a valve assembly for hydraulic systems which has the excess pressure relief function of opening when the upstream pressure exceeds the downstream pressure by a predetermined amount and the refilling function of opening when the downstream pressure exceeds the upstream pressure by a predetermined amount. Both functions involve forms of spring load valves and although one such valve is entirely contained within the other, the flow cross sections are substantially the same or at least have the same order of magnitude. The valve assembly includes an axially movable valve body which forms four pressure chambers with the casing and has four pressure faces to effect axial biasing of the valve body when subjected to fluid pressure in the pressure chambers. Restrictors are used to obtain desired pressures in two of the pressure chambers.

Abstract translation: 本发明涉及一种用于液压系统的阀组件，当上游压力超过下游压力预定量时，具有过大的压力释放功能，以及当下游压力超过上游压力预定量时的打开补充功能。 这两种功能涉及弹簧加载阀的形式，尽管一个这样的阀完全包含在另一个中，但是流动横截面基本相同或至少具有相同的数量级。 阀组件包括可轴向移动的阀体，其与壳体形成四个压力室，并具有四个压力面，以在压力室中经受流体压力时实现阀体的轴向偏置。 限制器用于在两个压力室中获得所需的压力。