Hydraulic control circuit for dredger slewing gear

摘要

The control circuit has a hydraulic fluid tank (10), connected to two adjusting pressure chambers (26,27). Each of the connections contains a separate brake valve (24,25). The first of the valves (24) is operated by the differential between the working pressure in the first working conduit (3), and the control pressure in the control conduit (20,21) charged with the higher pressure. The second valve (25) is operated by the differential between the working pressure in the second working conduit (4) and the control pressure in the control conduit charged with the higher pressure.