HYDRAULIC SYSTEM FOR CONTROL OF FLYING VEHICLE WING HIGH-LIFT DEVICES Russian patent published in 1996 - IPC

FIELD: aeronautical engineering. SUBSTANCE: hydraulic control system has cylinders 3 and 4 of flaps and leading edge, electrohydraulic cocks 1 and 2 for control of leading edges and with high-lift devices, spool valve selector 7 with control chamber in leading edge extension and retraction lines 13 and 11, throttle valve 5 and check valve 6. Spool valve selector is provided with additional control chamber; throttle valve 5 and valve 6 are fitted in leading edge extension main 17 between electrohydraulic cock 2 and spool valve selector 7 in parallel with control chamber. Additional control chamber is connected with electrohydraulic cock 1 by means of leading-edge extension line 18. During operation of device when electrohydraulic cock 1 is switched on, working fluid flows to additional chamber of spool valve selector via line 18; lines 11 and 13 are connected at this to electrohydraulic cock 1. When electrohydraulic cock 2 is switched on, lines 11 and 13 are connected to electrohydraulic cock 2 through check valve 6 and throttle valve 5. EFFECT: enhanced reliability due to simplification of construction. 1 dwg