公开(公告)号：US5582207A

公开(公告)日：1996-12-10

申请号：US403488

申请日：1995-03-14

申请人： Wendell L. Gilbert ,  Lisa R. Menyhart

发明人： Wendell L. Gilbert ,  Lisa R. Menyhart

IPC分类号： B62D5/083 ,  F15B13/04

CPC分类号： B62D5/0837 ,  Y10T137/86654 ,  Y10T137/86662

摘要： A valve (10) for controlling flow of hydraulic fluid. The valve (10) includes first and second valve members (80, 82), each having a plurality of lands and grooves. The valve members (80, 82) are relatively movable from a neutral position to a displaced position in which surface segments (202, 226, 208, 218) of respective pairs of lands overlap to form flow gaps (232, 234) for restricting flow of fluid between respective pairs of grooves. At least one (234) of the flow gaps is divergent by having a cross-sectional flow area which increases along a direction of fluid flow therethrough and at least one (232) of the flow gaps is convergent by having a cross-sectional flow area which decreases along a direction of fluid flow therethrough. The flow gaps (232, 234) have minimum cross-sectional flow areas (A, B) defined by the surface segments. The flow gaps (232, 234) are sized such that the minimum cross-sectional area (A) of the convergent flow gap (232) is larger than the minimum cross-sectional area (B) of the divergent flow gap (234) at a first rotational position, and are sized such that the minimum cross-sectional area (A) of the convergent flow gap (232) is smaller than the minimum cross-sectional area (B) of the divergent flow gap (234) at a second rotational position for suppressing valve noise.

摘要翻译： 一种用于控制液压流体流动的阀门（10）。 阀（10）包括第一和第二阀构件（80,82），每个具有多个平台和凹槽。 阀构件（80,82）可从中性位置相对移动到其中相应对的脊的表面段（202,226,208,218）重叠以形成用于限制流动的流动间隙（232,234）的位移位置 的各对槽之间的流体。 至少一个（234）的流动间隙通过具有沿流体流动方向增加的横截面流动面积而发散，并且至少一个（232）的流动间隙通过具有横截面流动面积 其沿流体流过的方向减小。 流动间隙（232,234）具有由表面段限定的最小横截面流动面积（A，B）。 流动间隙（232,234）的尺寸使得会聚流动间隙（232）的最小横截面积（A）大于发散流动间隙（234）的最小横截面积（B） 第一旋转位置，并且其尺寸使得会聚流动间隙（232）的最小横截面积（A）小于第二旋转位置处的发散流动间隙（234）的最小横截面积（B） 用于抑制阀门噪音的旋转位置。