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A platform for research: civil engineering, architecture and urbanism
HYDRAULIC DRIVE UNIT OF WORK MACHINE
PROBLEM TO BE SOLVED: To maintain a hydraulic actuator highly operable, even when a pressure accumulator has been sufficiently pressure-accumulated.SOLUTION: A hydraulic drive unit of a work machine has a hydraulic actuator (3), a tank (20), a flow control valve (6) and a pressure accumulator (300), and includes a regenerative control valve device (200) for controlling a flow amount passing through the flow control valve to be constant. The regenerative control valve device has a first control state for keeping a front-rear pressure difference of the flow control valve constant while accumulating pressure oil in the pressure accumulator, by leading the pressure oil flowing toward the tank from the flow control valve into the pressure accumulator, and a second control state that maintains the front-rear pressure difference of the flow control valve constant, by leading the pressure oil flowing toward the tank from the flow control valve into the tank.SELECTED DRAWING: Figure 2
【課題】蓄圧器が十分蓄圧されている状態においても、油圧アクチュエータの操作性を良好に保つ。【解決手段】油圧アクチュエータ（３）と、タンク（２０）と、流量制御弁（６）と、蓄圧器（３００）と、を有する作業機械の油圧駆動装置において、流量制御弁の通過流量を一定に制御するための回生制御用弁装置（２００）を備え、回生制御用弁装置は、流量制御弁からタンクに向かって流れる圧油を蓄圧器に導くことで、蓄圧器に圧油を蓄圧しながら流量制御弁の前後差圧を一定にする第一の制御状態と、流量制御弁からタンクに向かって流れる圧油をタンクに導くことで流量制御弁の前後差圧を一定にする第二の制御状態と、を有する。【選択図】図２
HYDRAULIC DRIVE UNIT OF WORK MACHINE
PROBLEM TO BE SOLVED: To maintain a hydraulic actuator highly operable, even when a pressure accumulator has been sufficiently pressure-accumulated.SOLUTION: A hydraulic drive unit of a work machine has a hydraulic actuator (3), a tank (20), a flow control valve (6) and a pressure accumulator (300), and includes a regenerative control valve device (200) for controlling a flow amount passing through the flow control valve to be constant. The regenerative control valve device has a first control state for keeping a front-rear pressure difference of the flow control valve constant while accumulating pressure oil in the pressure accumulator, by leading the pressure oil flowing toward the tank from the flow control valve into the pressure accumulator, and a second control state that maintains the front-rear pressure difference of the flow control valve constant, by leading the pressure oil flowing toward the tank from the flow control valve into the tank.SELECTED DRAWING: Figure 2
【課題】蓄圧器が十分蓄圧されている状態においても、油圧アクチュエータの操作性を良好に保つ。【解決手段】油圧アクチュエータ（３）と、タンク（２０）と、流量制御弁（６）と、蓄圧器（３００）と、を有する作業機械の油圧駆動装置において、流量制御弁の通過流量を一定に制御するための回生制御用弁装置（２００）を備え、回生制御用弁装置は、流量制御弁からタンクに向かって流れる圧油を蓄圧器に導くことで、蓄圧器に圧油を蓄圧しながら流量制御弁の前後差圧を一定にする第一の制御状態と、流量制御弁からタンクに向かって流れる圧油をタンクに導くことで流量制御弁の前後差圧を一定にする第二の制御状態と、を有する。【選択図】図２
HYDRAULIC DRIVE UNIT OF WORK MACHINE
作業機械の油圧駆動装置
ITO MASAMICHI (author) / OKI TAKATOSHI (author) / TAKAHASHI KIWAMU (author)
2018-02-08
Patent
Electronic Resource
Japanese