| 摘要 |
The device has an actuator (3) in the form of a slide or piston and a force return (29, 30) provided between the actuator (3) and the control valve. The control valve is of two-stage design and possesses a main control stage (9) in the form of a piston with at least one control face and a pilot stage (10) arranged centrally in this and in the form of a pilot piston, the pilot stage (10) and the main control stage (9) being in a follower control circuit. The control side (18) of the piston of the main control stage (9) is coupled to a connecting line, in which there are two resistors, at least one of which can be controlled by the pilot piston. Furthermore, the control side (6) of the actuator (3) is equipped with a further connecting line, in which there is at least one control cross-section (16) of the piston of the main control stage (9), whilst the other side of the actuator is connected directly or indirectly to the inflow (31). Finally, a force return (30) is provided between the actuator (3) and the pilot piston (9), and a return force (29) engages on the main control piston. <IMAGE> |
