| 摘要 |
<p>The present subject matter relates to a hydraulic control arrangement for controlling at least one actuator. The control arrangement here forms an open-center-system. For the at least one load, a control valve is provided, via which a circulating flow path extends. This on one hand is connected to a hydraulic pump and on the other hand to a tank. The circulating flow path is connected to the hydraulic pump via a pilot orifice, which is provided between the hydraulic pump and control valve. If the control valve controls the actuator via a metering orifice, then at the same time the circulating flow path is controlled and in addition a connection is controlled between the circulating flow path and the actuator downstream of the metering orifice. Via a pressure difference controller, a pressure difference is kept constant via the pilot orifice and the metering orifice, wherein a fluid volume flow to actuator is varied independent of the load pressure via the metering orifice.</p> |
