A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Provided is a slewing-type hydraulic work machine capable of driving a boom at a suitable speed while securing slewing torque for slewing start during a slewing and boom-raising operation, including a boom raising working pressure detection unit (81, 82, 70) that detects boom raising working pressure, and a capacity control device (70) that controls a slewing motor capacity during the slewing and boom-raising operation. The capacity control device (70) performs detecting an actual slewing distribution factor correspondence value corresponding to a ratio of energy distributed to a slewing motor (14) to energy of hydraulic oil discharged from an oil pressure supply device (11, 12), setting a boundary value of the actual slewing distribution factor correspondence value to limit the ratio more with increase in boom raising working pressure, and a capacity operation of making the slewing motor capacity higher than a limit capacity within a slewing priority allowable period until the actual slewing distribution factor correspondence value reaches the boundary value during the slewing and boom-raising operation and limiting the slewing motor capacity to the limit capacity or less after the slewing priority allowable period.
Provided is a slewing-type hydraulic work machine capable of driving a boom at a suitable speed while securing slewing torque for slewing start during a slewing and boom-raising operation, including a boom raising working pressure detection unit (81, 82, 70) that detects boom raising working pressure, and a capacity control device (70) that controls a slewing motor capacity during the slewing and boom-raising operation. The capacity control device (70) performs detecting an actual slewing distribution factor correspondence value corresponding to a ratio of energy distributed to a slewing motor (14) to energy of hydraulic oil discharged from an oil pressure supply device (11, 12), setting a boundary value of the actual slewing distribution factor correspondence value to limit the ratio more with increase in boom raising working pressure, and a capacity operation of making the slewing motor capacity higher than a limit capacity within a slewing priority allowable period until the actual slewing distribution factor correspondence value reaches the boundary value during the slewing and boom-raising operation and limiting the slewing motor capacity to the limit capacity or less after the slewing priority allowable period.
SLEWING-TYPE HYDRAULIC WORK MACHINE
SCHWENKBARE HYDRAULISCHE ARBEITSMASCHINE
ENGIN DE CHANTIER HYDRAULIQUE DU TYPE ORIENTABLE
KOZUI MASATOSHI (author)
2023-05-03
Patent
Electronic Resource
English