TWO-STAGE ELECTROHYDRAULIC AMPLIFIER Russian patent published in 2002 - IPC

Abstract RU 2183293 C2

FIELD: amplification of power in hydraulic control systems of various machines. SUBSTANCE: amplifiers has following components arranged in common housing: electromechanical converter with polarizing permanent magnets, control coils, upper and lower pole plates, T-shaped armature with damper and feedback spring rigidly secured to it, first amplification stage made in form of hydraulic bridge with two liquid-flow restrictors and liquid-flow throttling valve, type "nozzle-damper" formed by two opposite nozzles located coaxially with damper of electromagnetic converter located between them; distributing spool valve performing function of second amplification stage is located in bridge diagonal; spool valve is articulated with armature of electromechanical converter by means of feedback spring; permanent magnet is located in hole of upper pole plate; it is mounted differentially relative to tail-piece of armature at upper air gap for turning relative to axis of armature tail-piece. EFFECT: enhanced reliability. 3 dwg

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RU 2 183 293 C2

Authors

Vasil'Ev V.V.

Red'Ko P.G.

Ambarnikov A.V.

Shishulin A.A.

Dates

2002-06-10—Published

2000-05-31—Filed