Hydraulic valve arrangement

• Main Authors: Christensen, Thorkild, Zenker, Siegfried, Thomsen, Svend Erik
• Format: Patent
• Language: English
• Published: 12.07.2011

The invention concerns a hydraulic valve arrangement with a supply connection arrangement comprising a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement comprising two working connections (A, B), which can be connected to a motor, a directional valve arrangement located between the supply connection arrangement (P, T) and the working connection arrangement (A, B), and a compensation valve acted upon in a first activation direction by a pressure in a first pressure chamber, which is connected to a load-sensing pipe (LS), and, if required, by a spring, and in a second activation direction opposite to the first activation direction by a pressure downstream of the directional valve arrangement, said pressure acting in a second pressure chamber, the compensation valve having an inlet and an outlet. In connection with a post-compensated valve, it is endeavored to adjust the load pressures at the working connections (A, B) in dependence of the direction. For this purpose, each working connection (A, B) is connected to a control system, which amplifies the effect of the pressure in the first pressure chamber on the compensation valve in dependence of a pressure ruling at the working connection (A, B).