SELF-CONTAINED ELECTROHYDRAULIC DRIVE WITH COMBINATION CONTROL OF SPEED OF OUTLET MEMBER Russian patent published in 2007 - IPC F15B9/09 

FIELD: flying vehicles.

SUBSTANCE: drive is designed to control speed of outlet member of electrohydraulic actuator in control systems of flying vehicles. Proposed drive has electronic units of control microprocessor and amplifier-inverter, dc communicator less motor, fixed-delivery pump, hydraulic cylinder, hydraulic compensator, make-up valves, safety valves, filter, hydraulic cylinder rod position pickup. It contains also electrohydraulic reverse valve with linear electric motor, reverse valve spool position pickup and reverse valve inlet and outlet differential pressure pickups. Pump is nonreversible, and hydraulic compensator is of wind-up make including spring unit, wind-up plunger, wind-up plunger lock, threaded bushing of wind-up plunger travel control and electromagnet to release wind-up mechanism of compensator. Control of speed of outlet member at low error signals of servodrive is made to provided throttling control and at mean and high error signals, to provide positive control.

EFFECT: improved reliability.

2 cl, 2 dwg