公开(公告)号：WO1997037137A1

公开(公告)日：1997-10-09

申请号：PCT/DK1997000138

申请日：1997-03-26

Applicant: DANFOSS A/S

Inventor： DANFOSS A/S ,  COLLINS, David ,  JORGENSEN, Helge ,  MABIT, Xavier ,  CHRISTENSEN, Carsten

IPC: F15B13/02

CPC classification number: F15B13/0402 ,  F15B13/0416 ,  Y10T137/86879 ,  Y10T137/87185

Abstract: A hydraulic control valve for controlling flow between a pump, a hydraulic device, and a vessel containing hydraulic fluid. The control valve has an elongated valve slide which is slidably mounted in an elongated valve housing. The valve has three positions, a central neutral position, a float position axially offset in one direction from the neutral position and a constant pressure position axially offset in the opposite direction from the neutral position. In the neutral position, flow of hydraulic fluid to the hydraulic device is inhibited. In the float position, connection is such that a raised device, such as a hydraulically operated bucket, is lowered slowly by gravity until it rests on the ground or another object. In the constant pressure position, the valve connects pump pressure to the load sensing circuit to facilitate, for example, shaking of a bucket of a piece of earth moving equipment.

Abstract translation: 一种用于控制泵，液压装置和含有液压流体的容器之间的流动的液压控制阀。 控制阀具有细长的阀滑动件，其可滑动地安装在细长的阀壳体中。 阀具有三个位置，中心中立位置，从中立位置沿一个方向轴向偏移的浮子位置和在与中立位置相反的方向轴向偏移的恒定位置。 在中立位置，液压流体流向液压装置被阻止。 在浮动位置，连接使得诸如液压操作的铲斗之类的升高的装置通过重力被缓慢地降低，直到其搁置在地面或另一物体上。 在恒压位置，阀将泵压力连接到负载感测电路，以便于例如震动一块土方机械的铲斗。