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HYDRAULIC SYSTEM OF HYDRAULIC SHOVEL, HYDRAULIC SHOVEL, AND CONTROL METHOD OF HYDRAULIC SHOVEL
To properly distribute hydraulic oil discharged from two hydraulic pumps among three hydraulic cylinders.SOLUTION: A hydraulic system of a hydraulic shovel comprises a work state determination portion and a valve control portion. When a work state of a work machine is a heavy excavation state, the valve control portion controls a first boom operation valve, a first arm operation valve, a first bucket operation valve, a second boom operation valve, a second arm operation valve, and a second bucket operation valve so that passage of hydraulic oil from the first hydraulic pump to a boom cylinder is restricted, the hydraulic oil is supplied from a second hydraulic pump to the boom cylinder, the hydraulic oil is supplied from both the first hydraulic pump and the second hydraulic pump to and arm cylinder, and the hydraulic oil is supplied from one or both of the first hydraulic pump and the second hydraulic pump to a bucket cylinder.SELECTED DRAWING: Figure 7
【課題】２つの油圧ポンプから吐出された作動油を３つの油圧シリンダに適正に分配すること。【解決手段】油圧ショベルの油圧システムは、作業状態判定部及びバルブ制御部を備える。作業機の作業状態が重掘削状態であると判定された場合、バルブ制御部は、第１油圧ポンプからブームシリンダへの作動油の通過が制限され、且つ、第２油圧ポンプからブームシリンダに作動油が供給され、且つ、第１油圧ポンプ及び第２油圧ポンプの両方からアームシリンダに作動油が供給され、且つ、第１油圧ポンプ及び第２油圧ポンプの一方又は両方からバケットシリンダに作動油が供給されるように、第１ブーム操作弁、第１アーム操作弁、第１バケット操作弁、第２ブーム操作弁、第２アーム操作弁、及び第２バケット操作弁を制御する。【選択図】図７
HYDRAULIC SYSTEM OF HYDRAULIC SHOVEL, HYDRAULIC SHOVEL, AND CONTROL METHOD OF HYDRAULIC SHOVEL
To properly distribute hydraulic oil discharged from two hydraulic pumps among three hydraulic cylinders.SOLUTION: A hydraulic system of a hydraulic shovel comprises a work state determination portion and a valve control portion. When a work state of a work machine is a heavy excavation state, the valve control portion controls a first boom operation valve, a first arm operation valve, a first bucket operation valve, a second boom operation valve, a second arm operation valve, and a second bucket operation valve so that passage of hydraulic oil from the first hydraulic pump to a boom cylinder is restricted, the hydraulic oil is supplied from a second hydraulic pump to the boom cylinder, the hydraulic oil is supplied from both the first hydraulic pump and the second hydraulic pump to and arm cylinder, and the hydraulic oil is supplied from one or both of the first hydraulic pump and the second hydraulic pump to a bucket cylinder.SELECTED DRAWING: Figure 7
【課題】２つの油圧ポンプから吐出された作動油を３つの油圧シリンダに適正に分配すること。【解決手段】油圧ショベルの油圧システムは、作業状態判定部及びバルブ制御部を備える。作業機の作業状態が重掘削状態であると判定された場合、バルブ制御部は、第１油圧ポンプからブームシリンダへの作動油の通過が制限され、且つ、第２油圧ポンプからブームシリンダに作動油が供給され、且つ、第１油圧ポンプ及び第２油圧ポンプの両方からアームシリンダに作動油が供給され、且つ、第１油圧ポンプ及び第２油圧ポンプの一方又は両方からバケットシリンダに作動油が供給されるように、第１ブーム操作弁、第１アーム操作弁、第１バケット操作弁、第２ブーム操作弁、第２アーム操作弁、及び第２バケット操作弁を制御する。【選択図】図７
HYDRAULIC SYSTEM OF HYDRAULIC SHOVEL, HYDRAULIC SHOVEL, AND CONTROL METHOD OF HYDRAULIC SHOVEL
油圧ショベルの油圧システム、油圧ショベル、及び油圧ショベルの制御方法
SUMINO WATARU (author) / NAGURA SHINOBU (author) / HISHINUMA YUICHI (author)
2022-10-13
Patent
Electronic Resource
Japanese
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