FIELD: oil industry.
SUBSTANCE: hydraulic drive comprises hydraulic tank, power pump, power hydraulic cylinder, hydraulic distributor, hydraulic accumulator, pressure converter, and oil pipes. The hydraulic drive is provided with two hydraulic tanks whose spaces are connected with the above-piston space of the power hydraulic cylinder through the hydraulic lock and hydraulic distributor and with the power hydraulic pump through the stop valve. The pressure converter is made of the unit-multiplicator which is composed of hydraulic motor and hydraulic pump whose working volume is twice as small as that of the hydraulic motor. The hydraulic system has flow controller connected with the under-piston space of the hydraulic cylinder and with the hydraulic accumulator through the hydraulic lock.
EFFECT: reduced sizes and cost.
2 cl, 1 dwg
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