FIELD: hydraulic drives. SUBSTANCE: hydraulic drive includes adjustable hydraulic pumps coupled with drive motor shaft, hydraulic motors connected with fans, cooling liquid temperature transmitters installed in outlet main lines of radiators and hydraulic tank. Hydraulic pumps and hydraulic motors are connected in pairs to form volume-closed hydraulic systems whose number corresponds to number of fans. All hydraulic pumps are furnished with proportional electrohydraulic controllers. Auxiliary hydraulic pump is coupled with shaft of drive motor, outlet of auxiliary hydraulic pump being connected with inlet of newly introduced overflow valve and inlets of proportional electrohydraulic controllers, and, through newly introduced check valves, with inlets of adjustable hydraulic pumps and outlets of hydraulic motors. Inlet of auxiliary hydraulic pump and outlet of overflow valve are connected with hydraulic tank. Control unit is arranged between outlets of temperature transmitters and inlet of proportional electrohydraulic controllers. EFFECT: increased efficiency of hydraulic drive. 2 cl, 2 dwg
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