MULTICHANNEL BACKED-UP ELECTROHYDRAULIC DRIVE Russian patent published in 2007 - IPC F15B9/03 B64C13/42 

FIELD: aircraft industry; control systems of flying vehicles.

SUBSTANCE: proposed drive contains two-chamber hydraulic motor in form of hydraulic cylinders with tandem pistons and output link, pressure pickups and feedback pickups. Two control units accommodate in each housing electrohydraulic power amplifier, electrohydraulic valve, cut-in valve in form of spring-loaded distributing spool with beads connected by channels with pressure and drain hydraulic lines on one of two hydraulic systems, with pressure pickup, spaces of hydraulic cylinder, electrohydraulic power amplifier and electrohydraulic valve. Distributing spool is made differential, its bead from side opposite to spring and outer end face communicating with electrohydraulic valve is made with diameter larger than diameters of other beads.

EFFECT: improved functional in case of failures.

1 dwg