ELECTROHYDRAULIC DRIVE Russian patent published in 2009 - IPC F15B7/00 

FIELD: power engineering.

SUBSTANCE: electrohydraulic drive is intended for high-precision electrohydraulic systems of remote control. In volumetrical electrohydraulic drive, parallel to each of two make-up valves, an additional make-up valve is installed, which is adjusted to lower actuation pressure, compared to available one, and has higher slope of static characteristic, which is defined according to formula

where: P_act.1 - actuation pressure of the first and second make-up valves, P_act.2 - actuation pressure of the third and fourth make-up valves Q_leak - maximum flow rate of leaks from manifolds in mode of control actions development, for instance harmonic ones, with a specified accuracy.

EFFECT: reduction of insensitivity area in electrohydraulic drive and related dynamic properties of tracking electrohydraulic drives.

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