SELF-CONTAINED HYDRAULIC DRIVE- ELECTROHYDRAULIC SERVO UNIT MODULE Russian patent published in 2005 - IPC

FIELD: electrohydraulic servo units of displacement throttle adjustment type.

SUBSTANCE: proposed drive includes at least three servo units structurally and functionally combined in single module and rigidly interconnected by common housing. Output members of servo unit moving independently are of polar arrangement on peripheral zones of housing at equal radius-vector from central axis. Housing is provided with supporting bases having holes for connecting the servo unit module to flying vehicle fuselage. Hydromechanical locking unit of each servo unit includes cover with central through hole mounted immovably in guide bore and differential piston and lock position sensor which are kinematically interconnected; differential spring-loaded piston is sealed over external surface and is provided with blind internal stepped bore and external axial projection on side of closed end; lock position sensor is made in form of microswitch located on external surface of servo unit module housing. Lock is mounted in stepped bore, with smaller step towards output member, thus forming control chamber communicated with pressure passage of controllable command pressure source to ensure quick response and independent operation.

EFFECT: enhanced compactness, economical and operational efficiency.

2 cl, 5 dwg