Hydraulic control device for e.g. load sensing load, has load signaling line connected with chamber, and control edge provided at piston of control valve, with which flow cross section between supply line and signaling line is controlled

摘要

The device has a measuring orifice supplying a pressurizing medium to a hydraulic load (14). A variable displacement pump (10) is controlled depending on a highest load pressure of actuated hydraulic loads (14, 15) in such a manner that pressure in a supply line (13) lies above the load pressure around a predetermined pressure difference. A load signaling line (38) is connected with a control chamber of a pressure scale (30). A control edge is provided at a valve piston (48) of a control valve (45), with which a flow cross section between the supply line and load signaling line is controlled.