Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
HYDRAULIC SYSTEM FOR WORK MACHINES
Excellent combined operability is realized while suppressing a divergence loss during a swing boom raising operation and suppressing degradation of fuel economy. A hydraulic system for a work machine includes a first hydraulic pump 2a driving a swing hydraulic motor 3; a second hydraulic pumps 2b, 2c driving a boom cylinder 4; a first pump displacement increase valve 51a controlling a volume of the first hydraulic pump 2a; a swing pilot pressure sensor 12 detecting a swing operation amount; a boom raising pilot pressure sensor 13 detecting a boom raising operation amount; and a controller 100 controlling a control signal to the first pump displacement increase valve 51a on the basis of the swing operation amount and the boom raising operation amount. The controller controls the control signal in such a manner that a delivery rate of the first hydraulic pump 2a becomes higher as the swing operation amount is larger and an increasing rate of the delivery rate of the first hydraulic pump 2a becomes lower as the boom raising operation amount is larger during a swing boom raising operation.
HYDRAULIC SYSTEM FOR WORK MACHINES
Excellent combined operability is realized while suppressing a divergence loss during a swing boom raising operation and suppressing degradation of fuel economy. A hydraulic system for a work machine includes a first hydraulic pump 2a driving a swing hydraulic motor 3; a second hydraulic pumps 2b, 2c driving a boom cylinder 4; a first pump displacement increase valve 51a controlling a volume of the first hydraulic pump 2a; a swing pilot pressure sensor 12 detecting a swing operation amount; a boom raising pilot pressure sensor 13 detecting a boom raising operation amount; and a controller 100 controlling a control signal to the first pump displacement increase valve 51a on the basis of the swing operation amount and the boom raising operation amount. The controller controls the control signal in such a manner that a delivery rate of the first hydraulic pump 2a becomes higher as the swing operation amount is larger and an increasing rate of the delivery rate of the first hydraulic pump 2a becomes lower as the boom raising operation amount is larger during a swing boom raising operation.
HYDRAULIC SYSTEM FOR WORK MACHINES
HYDRAULIKSYSTEM FÜR ARBEITSMASCHINEN
SYSTÈME HYDRAULIQUE POUR ENGINS DE CHANTIER
MORIKI HIDEKAZU (Autor:in) / IMURA SHINYA (Autor:in) / IZUMI SHIHO (Autor:in) / AMANO HIROAKI (Autor:in) / ISHIKAWA KOUJI (Autor:in)
30.06.2021
Patent
Elektronische Ressource
Englisch
Machines for hydraulic excavation work
| Online Contents | 1975
Machines for hydraulic excavation work
| Springer Verlag | 1975