ELECTRO HYDRAULIC DRIVE Russian patent published in 2008 - IPC F15B11/20 

FIELD: engines and pumps.

SUBSTANCE: drive can be used in drives of anti-aircraft aiming in rocket-gun systems. A unit of hydraulic distributors in the electric hydraulic drive (EHD) is made in form of three two-position hydraulic distributors with electric control; and where a flow of working liquid via the said distributors goes in turn to actuators of EHD under a control command to a relative hydraulic distributor. At the absence of the control command outputs of a hydro pump are tied to each other via serially connected inputs of three hydro distributors, while working cavities of actuators of EHD are locked by interior cavities of the distributors. Control of distributors is achieved by means of a logic device which is able to create three commands out of two coming to its input, and these three commands control in turn three hydro distributors. Such design of a hydro distributors unit and the logical unit facilitate unloading the hydro pump at absence of control commands and maintaining load at any specified angle thus achieving the above described technical result.

EFFECT: increase of operational reliability and enhancement of drive features.

2 cl, 2 dwg