HYDRAULIC DRIVE FOR SINGLE-BUCKET EXCAVATOR Russian patent published in 2004 - IPC

FIELD: building and mining industry.

SUBSTANCE: hydraulic drive has pump and hydraulic motor operated in accordance with "p=const" law. Pump and hydraulic motor are rotated by power engine having flywheel. Hydraulic drive also has hydraulic engines to actuate executive mechanisms including hydraulic cylinder of working equipment, valves of "OR" type arranged between pressure and discharge pipelines of hydraulic engines, distribution equipment, check valve installed between pressure and discharge pipelines of pump and hydraulic motor and tank with check valve located between distribution equipment and head end of hydraulic cylinder for working equipment. Inlet of check valve arranged between distribution equipment and head end of hydraulic cylinder is connected to distributor, outlet thereof is linked with head end of hydraulic cylinder and with input of "OR" type valve.

EFFECT: increased hydraulic drive economy due to transferring potential energy of lifter working equipment to drive.

1 dwg