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A platform for research: civil engineering, architecture and urbanism
SHOVEL AND HYDRAULIC CIRCUIT OF WORK MACHINE
To provide a technique that can suppress hunting (vibration) of electromagnetic relief valves in a hydraulic circuit of work machines such as shovels.SOLUTION: A shovel 100 according to an embodiment of the present disclosure includes: a hydraulic oil tank T for storing hydraulic oil; a main pump 14 for sucking hydraulic oil from the hydraulic oil tank T; a hydraulic actuator driven by hydraulic oil discharged from the main pump 14; a return oil passage 70 for returning hydraulic oil discharged from the hydraulic actuator to the hydraulic oil tank T; electromagnetic relief valves 82, 92 capable of discharging, to the hydraulic oil tank T, hydraulic oil at predetermined locations in an oil passage from the main pump 14 to the hydraulic oil tank T; and return oil passages 80, 90 different from the return oil passage 70, connecting the electromagnetic relief valves 82, 92 and the hydraulic oil tank T.SELECTED DRAWING: Figure 5
【課題】ショベル等の作業機械の油圧回路における電磁リリーフ弁のハンチング（振動）を抑制することが可能な技術を提供する。【解決手段】本開示の一実施形態に係るショベル１００は、作動油を貯蔵する作動油タンクＴと、作動油タンクＴから作動油を吸い込むメインポンプ１４と、メインポンプ１４から吐出される作動油で駆動される油圧アクチュエータと、油圧アクチュエータから排出される作動油を作動油タンクＴに戻す戻り油路７０と、メインポンプ１４から作動油タンクＴまでの油路の中の所定箇所の作動油を作動油タンクＴに排出可能な電磁リリーフ弁８２，９２と、電磁リリーフ弁８２，９２と作動油タンクＴとを接続する、戻り油路７０と異なる戻り油路８０，９０と、を備える。【選択図】図５
SHOVEL AND HYDRAULIC CIRCUIT OF WORK MACHINE
To provide a technique that can suppress hunting (vibration) of electromagnetic relief valves in a hydraulic circuit of work machines such as shovels.SOLUTION: A shovel 100 according to an embodiment of the present disclosure includes: a hydraulic oil tank T for storing hydraulic oil; a main pump 14 for sucking hydraulic oil from the hydraulic oil tank T; a hydraulic actuator driven by hydraulic oil discharged from the main pump 14; a return oil passage 70 for returning hydraulic oil discharged from the hydraulic actuator to the hydraulic oil tank T; electromagnetic relief valves 82, 92 capable of discharging, to the hydraulic oil tank T, hydraulic oil at predetermined locations in an oil passage from the main pump 14 to the hydraulic oil tank T; and return oil passages 80, 90 different from the return oil passage 70, connecting the electromagnetic relief valves 82, 92 and the hydraulic oil tank T.SELECTED DRAWING: Figure 5
【課題】ショベル等の作業機械の油圧回路における電磁リリーフ弁のハンチング（振動）を抑制することが可能な技術を提供する。【解決手段】本開示の一実施形態に係るショベル１００は、作動油を貯蔵する作動油タンクＴと、作動油タンクＴから作動油を吸い込むメインポンプ１４と、メインポンプ１４から吐出される作動油で駆動される油圧アクチュエータと、油圧アクチュエータから排出される作動油を作動油タンクＴに戻す戻り油路７０と、メインポンプ１４から作動油タンクＴまでの油路の中の所定箇所の作動油を作動油タンクＴに排出可能な電磁リリーフ弁８２，９２と、電磁リリーフ弁８２，９２と作動油タンクＴとを接続する、戻り油路７０と異なる戻り油路８０，９０と、を備える。【選択図】図５
SHOVEL AND HYDRAULIC CIRCUIT OF WORK MACHINE
ショベル、作業機械用油圧回路
OKADA JUNICHI (author)
2022-10-14
Patent
Electronic Resource
Japanese
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