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A platform for research: civil engineering, architecture and urbanism
CONSTRUCTION MACHINE HYDRAULIC CIRCUIT
PROBLEM TO BE SOLVED: To make it possible to easily reduce a discharge quantity of a second pump and to suppress energy consumption if the discharge quantity of the second pump is surplus due to regeneration of pressure oil in a configuration in which discharge quantities of first and second pumps are controlled to be interlocked with each other.SOLUTION: A regeneration passage 71 carries out "pressure oil regeneration" for supplying boom discharge oil (regeneration target discharge oil) discharged from a boom cylinder 23F (regeneration target actuator) to the boom cylinder 23F (actuator operating by supplying discharge oil of a second pump 12 to the actuator). A first detection pressure increase passage 81 supplies part of boom discharge oil 35 Fo to a first unload passage 31 upstream of a first pressure detection unit 61p at a time of the pressure oil regeneration.
【課題】第１ポンプおよび第２ポンプそれぞれの吐出量が連動して制御される構成において、圧油再生が行われることで第２ポンプの吐出量が余るときに、第２ポンプの吐出量を減らしやすく、エネルギー消費を抑制できるようにする。【解決手段】再生通路７１は、ブーム用シリンダ２３Ｆ（再生対象アクチュエータ）から排出されたブーム排出油（再生対象排出油）を、ブーム用シリンダ２３Ｆ（第２ポンプ１２の吐出油が供給されることにより作動するアクチュエータ）に供給する「圧油再生」を行う。第１検知圧上昇通路８１は、圧油再生が行われるときに、第１圧力検知部６１ｐよりも上流側の第１アンロード通路３１にブーム排出油３５Ｆｏの一部を供給する。【選択図】図２
CONSTRUCTION MACHINE HYDRAULIC CIRCUIT
PROBLEM TO BE SOLVED: To make it possible to easily reduce a discharge quantity of a second pump and to suppress energy consumption if the discharge quantity of the second pump is surplus due to regeneration of pressure oil in a configuration in which discharge quantities of first and second pumps are controlled to be interlocked with each other.SOLUTION: A regeneration passage 71 carries out "pressure oil regeneration" for supplying boom discharge oil (regeneration target discharge oil) discharged from a boom cylinder 23F (regeneration target actuator) to the boom cylinder 23F (actuator operating by supplying discharge oil of a second pump 12 to the actuator). A first detection pressure increase passage 81 supplies part of boom discharge oil 35 Fo to a first unload passage 31 upstream of a first pressure detection unit 61p at a time of the pressure oil regeneration.
【課題】第１ポンプおよび第２ポンプそれぞれの吐出量が連動して制御される構成において、圧油再生が行われることで第２ポンプの吐出量が余るときに、第２ポンプの吐出量を減らしやすく、エネルギー消費を抑制できるようにする。【解決手段】再生通路７１は、ブーム用シリンダ２３Ｆ（再生対象アクチュエータ）から排出されたブーム排出油（再生対象排出油）を、ブーム用シリンダ２３Ｆ（第２ポンプ１２の吐出油が供給されることにより作動するアクチュエータ）に供給する「圧油再生」を行う。第１検知圧上昇通路８１は、圧油再生が行われるときに、第１圧力検知部６１ｐよりも上流側の第１アンロード通路３１にブーム排出油３５Ｆｏの一部を供給する。【選択図】図２
CONSTRUCTION MACHINE HYDRAULIC CIRCUIT
建設機械用油圧回路
IWASAKI HITOSHI (author)
2016-01-28
Patent
Electronic Resource
Japanese
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