A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION MACHINE
A hydraulic drive system of construction machine including: turning motor; turning operation device that outputs turning operation signal corresponding to inclination angle of operating lever; turning direction switching valve including spool and driver, driver receiving command current and driving spool, turning direction switching valve increasing amount of hydraulic liquid supplied to turning motor and amount of hydraulic liquid discharged from turning motor with increase in command current; controller that feeds command current to turning direction switching valve, wherein command current increases in accordance with increase in turning operation signal; and pressure sensor that detects outflow pressure of turning motor. Where turning operation signal decreases, when outflow pressure of turning motor, which is detected by pressure sensor, is higher than threshold and is increasing, controller feeds command current to turning direction switching valve, wherein a moving speed of spool is kept to be less than or equal to limiting value.
HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION MACHINE
A hydraulic drive system of construction machine including: turning motor; turning operation device that outputs turning operation signal corresponding to inclination angle of operating lever; turning direction switching valve including spool and driver, driver receiving command current and driving spool, turning direction switching valve increasing amount of hydraulic liquid supplied to turning motor and amount of hydraulic liquid discharged from turning motor with increase in command current; controller that feeds command current to turning direction switching valve, wherein command current increases in accordance with increase in turning operation signal; and pressure sensor that detects outflow pressure of turning motor. Where turning operation signal decreases, when outflow pressure of turning motor, which is detected by pressure sensor, is higher than threshold and is increasing, controller feeds command current to turning direction switching valve, wherein a moving speed of spool is kept to be less than or equal to limiting value.
HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION MACHINE
MURAOKA HIDEYASU (author) / NOSE TOMOMICHI (author) / KINOSHITA NOBUYUKI (author) / OKASHIRO TAKASHI (author) / SAKAMOTO MORIYUKI (author)
2021-01-07
Patent
Electronic Resource
English
IPC:
E02F
Baggern
,
DREDGING