STANDBY ELECTROHYDRAULIC DRIVE UNIT Russian patent published in 2002 - IPC

Abstract RU 2190129 C2

FIELD: hydroautomatics, possibly actuators of automatic control systems of different machines, mechanisms, transport vehicles. SUBSTANCE: drive unit includes mutually connected by two hydraulic lines two-chamber hydraulic cylinder and two electrohydraulic control circuit. Each control circuit is provided with hydraulic distributor with slide valve (seven-way slide valve). Supply hydraulic line through circulation valve is connected with right mean collar and simultaneously through constant area throttles - to its under-end control chambers and nozzles; draining line is connected with right terminal shoulder and with left mean shoulder. Cavities of hydraulic cylinder chamber are connected respectively with right terminal and mean turnings, with left mean and left terminal shoulders and they are mutually communicated through windows (formed by means of negative overlappings along shoulders) and left terminal turning in such a way that value of each negative ovelapping consists 1.5-2 reduced values of possible signal difference in control inlets of each electrohydraulic circuit. EFFECT: enhanced reliability. 2 dwg

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RU 2 190 129 C2

Authors

Red'Ko P.G.

Ambarnikov A.V.

Elagin E.V.

Kuznetsov P.I.

Dates

2002-09-27—Published

2000-10-17—Filed