ELECTROHYDRAULIC SERVO VALVE Russian patent published in 1995 - IPC

FIELD: valving. SUBSTANCE: servo valve has electronic unit 1, electromechanical signal converter 2, hydraulic amplifier 3 of the preliminary amplifying circuit, distributing slide valve 4 of the output amplifying circuit, and pickup of position of slide valve 5. Armature 12 and coils 6,7 with control windings of electromechanical signal converter 2 are mounted to be shifted with respect to the symmetry axis between pole plates 10,11. The bottom coils are received in opening 14 of bottom pole plate 11. Movable system of electromechanical signal converter 2 is provided with flexible suspension 15 whose bottom thickening end 16 with sealing ring 17 is received in opening 18 provided in the base of electromechanical signal converter 2. Flange 20 abuts against base 19 via spacer 21. EFFECT: enhanced reliability. 2 dwg