FIELD: pneumohydraulic automation. SUBSTANCE: drive includes adder, distributing device, jet engine provided with meter for measuring the pressure and rate of its rise, program logic unit for determination of moment of emergency change-over and computer unit for calculating and limiting the kinetic energy of loading moment and lag time. Jet engine is provided with inlet made in form of central hole and inlet in form of circular groove; central branch pipe is provided with cylindrical band. Circular branch pipe has lesser length and larger passage area. Distributor is provided with control and controllable valves; each valve has two shut-off members and two seats; one of them is normally open and is made in housing; other is normally open and movable; shutoff member of controllable valve is engageable with armature of electromagnet through pusher. Limit switch unit includes reed relays connected to circuit of electromagnets and changed-over by means of permanent magnets each of which is mounted in holder mounted on horizontal axle provided with cam for engagement with stops of lever secured on output shaft; one end of swinging spring is secured on panel and other end is secured on holder for turn in vertical plane together with permanent magnet. EFFECT: enhanced reliability. 10 cl, 13 dwg
