A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LIQUID PRESSURE DRIVE SYSTEM
To provide a liquid pressure drive system which can improve a lift of a first liquid pressure pump.SOLUTION: A liquid pressure drive system includes a first liquid pressure pump, a second liquid pressure pump, a plurality of first direction control valves, a first bypass cut valve, a plurality of second direction control valves, and a second bypass cut valve. The plurality of first direction control valves includes a direction control valve with a pressure-source switching function connected to a target actuator which is one of the plurality of liquid pressure actuators. The direction control valve with a pressure-source switching function is connected to the first liquid pressure pump via a liquid passage, and connects the target actuator and the liquid passage so as to switch to a supply position at which the first bypass passage opens. The liquid passage includes a check valve for allowing a flow to the direction control valve with a pressure-source switching function, and a confluence passage is connected on a downstream side of the check valve. The confluence passage is a second bypass passage and is connected to an upstream side of the second bypass cut valve.SELECTED DRAWING: Figure 1
【課題】第１液圧ポンプの寿命を向上させることができる液圧駆動システムを提供する。【解決手段】液圧駆動システムは、第１液圧ポンプと、第２液圧ポンプと、複数の第１方向制御弁と、第１バイパスカット弁と、複数の第２方向制御弁と、第２バイパスカット弁と、を備え、複数の第１方向制御弁は、複数の液圧アクチュエータのうちの１つである対象アクチュエータに接続される圧源切換機能付き方向制御弁を含み、圧源切換機能付き方向制御弁は、液通路を介して第１液圧ポンプに接続され、対象アクチュエータと液通路とを接続し且つ第１バイパス通路を開く供給位置に切換ることができ、液通路は、圧源切換機能付き方向制御弁への流れを許容する逆止弁が介在し、且つ逆止弁の下流側に合流通路が接続され、合流通路は、第２バイパス通路であって第２バイパスカット弁の上流側に接続されている。【選択図】 図１
LIQUID PRESSURE DRIVE SYSTEM
To provide a liquid pressure drive system which can improve a lift of a first liquid pressure pump.SOLUTION: A liquid pressure drive system includes a first liquid pressure pump, a second liquid pressure pump, a plurality of first direction control valves, a first bypass cut valve, a plurality of second direction control valves, and a second bypass cut valve. The plurality of first direction control valves includes a direction control valve with a pressure-source switching function connected to a target actuator which is one of the plurality of liquid pressure actuators. The direction control valve with a pressure-source switching function is connected to the first liquid pressure pump via a liquid passage, and connects the target actuator and the liquid passage so as to switch to a supply position at which the first bypass passage opens. The liquid passage includes a check valve for allowing a flow to the direction control valve with a pressure-source switching function, and a confluence passage is connected on a downstream side of the check valve. The confluence passage is a second bypass passage and is connected to an upstream side of the second bypass cut valve.SELECTED DRAWING: Figure 1
【課題】第１液圧ポンプの寿命を向上させることができる液圧駆動システムを提供する。【解決手段】液圧駆動システムは、第１液圧ポンプと、第２液圧ポンプと、複数の第１方向制御弁と、第１バイパスカット弁と、複数の第２方向制御弁と、第２バイパスカット弁と、を備え、複数の第１方向制御弁は、複数の液圧アクチュエータのうちの１つである対象アクチュエータに接続される圧源切換機能付き方向制御弁を含み、圧源切換機能付き方向制御弁は、液通路を介して第１液圧ポンプに接続され、対象アクチュエータと液通路とを接続し且つ第１バイパス通路を開く供給位置に切換ることができ、液通路は、圧源切換機能付き方向制御弁への流れを許容する逆止弁が介在し、且つ逆止弁の下流側に合流通路が接続され、合流通路は、第２バイパス通路であって第２バイパスカット弁の上流側に接続されている。【選択図】 図１
LIQUID PRESSURE DRIVE SYSTEM
液圧駆動システム
HARADA TATSUKI (author) / JITOSHO HISAO (author) / HATA NAOKI (author)
2024-10-10
Patent
Electronic Resource
Japanese
Liquid-pressure drive system and construction machine including same
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