公开(公告)号：US4733601A

公开(公告)日：1988-03-29

申请号：US907378

申请日：1986-09-15

申请人： Roland Neirynck

发明人： Roland Neirynck

IPC分类号： F15B9/10

CPC分类号： F15B9/10

摘要： There is disclosed a combined servo control and jack unit which comprises a casing, an actuated piston slidably disposed in a piston chamber and having a piston rod extending outwardly of the casing. A servo valve chamber, axially parallel to the piston chamber, has slidably mounted therein a spool and also a sleeve member which is mechanically connected to the piston rod. Shifting the spool in either axial direction directs hydraulic fluid to one or the other side of the piston, thus moving the latter until spool stopping, at which time the sleeve automatically, almost instantly, blocks off the flow in the new position. A variable speed, gradual action of the piston is obtained without hydraulic shock or cavitation.

摘要翻译： 公开了一种组合的伺服控制和千斤顶单元，其包括壳体，可动地设置在活塞室中并具有从壳体向外延伸的活塞杆的致动活塞。 轴向平行于活塞室的伺服阀室可滑动地安装在其中，阀芯以及机械地连接到活塞杆的套筒构件。 在轴向方向上转动阀芯将液压流体引导到活塞的一侧或另一侧，从而将阀芯移动到活塞的一侧或另一侧，直到阀芯停止，此时套管几乎立即自动堵塞新位置的流动。 在没有液压冲击或气蚀的情况下获得活塞的可变速度，逐渐的作用。