Drive for hydraulic motors and cylinders - has back pressure valve and precontrolled hydraulic brake valve

摘要

The drive is for hydraulic motors, and uses high pressure- and brake units, and a control appliance. A back pressure valve (9), which opens towards the motor, is positioned in the supply conduit (2) from the motor to the control valve (1). A pre-controlled hydraulic brake valve (13) with high pressure function is located between the supply conduit (2) and an outlet conduit (25) into the tank (27). The outlet conduit and a connection conduit (3) between control appliance and motor, are connected by a second back pressure valve (29), which opens towards the connection conduit. The tank connection (26) on the outlet conduit contains an adjustable throttle (28). The brake valve is connected to the supply conduit, and, via a pilot conduit (31), to the connection conduit.