POSITIVE-DISPLACEMENT CLOSED HYDRAULIC DRIVE Russian patent published in 2008 - IPC F16H39/02 F16H61/42 

FIELD: mechanical hydraulics.

SUBSTANCE: positive-displacement closed hydraulic drive comprises piston pump with the electrohydraulic control mechanism and hydraulic motor interconnected through hydraulic lines that are connected to the outlets of two reduction valves. The drive is additionally provided with an auxiliary pump whose pressure line is connected with the inlet of the electrohydraulic control mechanism, with the inlets of the reduction valves, and with the drain through the safety valve. The member of the controlled pump is kinematically connected with the slide valve of the proportional hydraulic distributor. The reduction valves are controllable, and their control inlets are connected with the chambers formed between the throttles of the electrohydraulic control mechanism through a hydraulic line.

EFFECT: enhanced efficiency.

3 dwg