Hydraulic drive for high-speed grinder has adjustable motor-driven hydraulic pump with control unit and hydraulic motor to drive hacking rotor

摘要

The closed-circuit hydraulic drive has an adjustable hydraulic pump (1) with a control unit and a hydraulic motor (2). The control unit consists of a 4/3 path valve (20) and a programmable electronic control (21) acting on it, operated by a linear pressure sensor (22). A pressure line (25) in the brake valve (27) bypasses the motor.