A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CONSTRUCTION MACHINE WITH ANTI-CAVITATION SYSTEM FOR THE HYDRAULIC ACTUATOR
A hydraulic excavator is equipped with: an arm cylinder (34) driven by a hydraulic working fluid from a hydraulic pump (23); a meter-out passage (L4) through which the hydraulic working fluid discharged from the arm cylinder flows; a control valve (41) controlling the hydraulic working fluid flow rate of the meter-out passage; a pressure sensor (SE5) detecting a load acting on the arm cylinder; a pressure sensor (SE3) detecting an operation amount of an operation device (42) operating the arm cylinder; and a controller (44). The controller alternatively selects a normal operation mode in which the opening area of the control valve is controlled based on an actuator load and the operation amount, and a substitution operation mode in which the opening area of the control valve is controlled based on the operation amount. When the substitution operation mode is selected, a delivery flow rate of the hydraulic pump is further increased than when the normal operation mode is selected.
CONSTRUCTION MACHINE WITH ANTI-CAVITATION SYSTEM FOR THE HYDRAULIC ACTUATOR
A hydraulic excavator is equipped with: an arm cylinder (34) driven by a hydraulic working fluid from a hydraulic pump (23); a meter-out passage (L4) through which the hydraulic working fluid discharged from the arm cylinder flows; a control valve (41) controlling the hydraulic working fluid flow rate of the meter-out passage; a pressure sensor (SE5) detecting a load acting on the arm cylinder; a pressure sensor (SE3) detecting an operation amount of an operation device (42) operating the arm cylinder; and a controller (44). The controller alternatively selects a normal operation mode in which the opening area of the control valve is controlled based on an actuator load and the operation amount, and a substitution operation mode in which the opening area of the control valve is controlled based on the operation amount. When the substitution operation mode is selected, a delivery flow rate of the hydraulic pump is further increased than when the normal operation mode is selected.
CONSTRUCTION MACHINE WITH ANTI-CAVITATION SYSTEM FOR THE HYDRAULIC ACTUATOR
BAUMASCHINE MIT ANTIKAVITATIONSSYSTEM FÜR DEN HYDRAULIKAKTUATOR
ENGIN DE CONSTRUCTION AVEC SYSTÈME ANTICAVITATION POUR L'ACTIONNEUR HYDRAULIQUE
AMANO HIROAKI (author) / IMURA SHINYA (author) / YAMASHITA RYOUHEI (author) / NISHIKAWA SHINJI (author)
2021-05-05
Patent
Electronic Resource
English
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