A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic drive device for construction machinery
During aerial boom lowering of a boom (131) by a front work machine (130) in which rotation by the tare weight is possible, potential energy is regenerated by working a hydraulic pump/motor (7) as a motor, operating a generator/electric motor (10) as a generator, and performing power generation using pressure oil discharged from the bottom-side chamber (5b) of a boom cylinder (5). When the front work machine (130) is jacking and rotation of the boom (131) by the tare weight is not possible, jacking is performed by operating the generator/electric motor (10) as an electric motor, working the hydraulic pump/motor (7) as a pump, and supplying pressure oil from the bottom-side chamber (5b) of the boom cylinder (5) to the rod-side chamber (5a) of the boom cylinder (5) without supplying pressure oil from the main pump (2) to the rod-side chamber (5a) of the boom cylinder (5).
Hydraulic drive device for construction machinery
During aerial boom lowering of a boom (131) by a front work machine (130) in which rotation by the tare weight is possible, potential energy is regenerated by working a hydraulic pump/motor (7) as a motor, operating a generator/electric motor (10) as a generator, and performing power generation using pressure oil discharged from the bottom-side chamber (5b) of a boom cylinder (5). When the front work machine (130) is jacking and rotation of the boom (131) by the tare weight is not possible, jacking is performed by operating the generator/electric motor (10) as an electric motor, working the hydraulic pump/motor (7) as a pump, and supplying pressure oil from the bottom-side chamber (5b) of the boom cylinder (5) to the rod-side chamber (5a) of the boom cylinder (5) without supplying pressure oil from the main pump (2) to the rod-side chamber (5a) of the boom cylinder (5).
Hydraulic drive device for construction machinery
SATO KENSUKE (author) / NAKAMURA TSUYOSHI (author) / ISHIKAWA KOUJI (author)
2015-05-13
Patent
Electronic Resource
English