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A platform for research: civil engineering, architecture and urbanism
HYDRAULIC CIRCUIT, DIRECTION SWITCH VALVE FOR HYDRAULIC CIRCUIT, AND CONSTRUCTION MACHINE
To adjust oil supply amount according to a burden of an actuator.SOLUTION: A hydraulic circuit 20 has an open center passage CL to which oil is supplied from a pump P, a direction switch valve 40 that is provided on the open center passage CL to control the supply of oil supplied from the pump P to an actuator A1, and opens the open center passage CL when difference pressure obtained by subtracting the pressure of the oil supplied to the actuator A1 from the pressure of the oil supplied from the pump P is larger than a set value, a throttle 21 provided on the downstream side of the direction switch valve 40 on the open center passage CL, and a regulator 22 that controls the supply amount of oil from the pump P according to pressure in the open center passage CL between the throttle 21 and the direction switch valve 40.SELECTED DRAWING: Figure 1
【課題】アクチュエータの負荷に応じた油供給量の調節を可能にする。【解決手段】油圧回路２０は、ポンプＰから油を供給されるオープンセンタ通路ＣＬと、オープンセンタ通路ＣＬ上に設けられてポンプＰから供給された油のアクチュエータＡ１への供給を制御し、アクチュエータＡ１へ供給する油の圧力をポンプＰから供給される油の圧力から引いた差圧が設定値よりも大きい場合にオープンセンタ通路ＣＬを開放する方向切換弁４０と、オープンセンタ通路ＣＬの方向切換弁４０よりも下流側に設けられた絞り２１と、絞り２１と方向切換弁４０との間におけるオープンセンタ通路ＣＬ内の圧力に応じてポンプＰからの油の供給量を制御するレギュレータ２２と、を有する。【選択図】図１
HYDRAULIC CIRCUIT, DIRECTION SWITCH VALVE FOR HYDRAULIC CIRCUIT, AND CONSTRUCTION MACHINE
To adjust oil supply amount according to a burden of an actuator.SOLUTION: A hydraulic circuit 20 has an open center passage CL to which oil is supplied from a pump P, a direction switch valve 40 that is provided on the open center passage CL to control the supply of oil supplied from the pump P to an actuator A1, and opens the open center passage CL when difference pressure obtained by subtracting the pressure of the oil supplied to the actuator A1 from the pressure of the oil supplied from the pump P is larger than a set value, a throttle 21 provided on the downstream side of the direction switch valve 40 on the open center passage CL, and a regulator 22 that controls the supply amount of oil from the pump P according to pressure in the open center passage CL between the throttle 21 and the direction switch valve 40.SELECTED DRAWING: Figure 1
【課題】アクチュエータの負荷に応じた油供給量の調節を可能にする。【解決手段】油圧回路２０は、ポンプＰから油を供給されるオープンセンタ通路ＣＬと、オープンセンタ通路ＣＬ上に設けられてポンプＰから供給された油のアクチュエータＡ１への供給を制御し、アクチュエータＡ１へ供給する油の圧力をポンプＰから供給される油の圧力から引いた差圧が設定値よりも大きい場合にオープンセンタ通路ＣＬを開放する方向切換弁４０と、オープンセンタ通路ＣＬの方向切換弁４０よりも下流側に設けられた絞り２１と、絞り２１と方向切換弁４０との間におけるオープンセンタ通路ＣＬ内の圧力に応じてポンプＰからの油の供給量を制御するレギュレータ２２と、を有する。【選択図】図１
HYDRAULIC CIRCUIT, DIRECTION SWITCH VALVE FOR HYDRAULIC CIRCUIT, AND CONSTRUCTION MACHINE
油圧回路、油圧回路用の方向切換弁および建設機械
IWASAKI HITOSHI (author) / GOTO KEISUKE (author)
2021-08-02
Patent
Electronic Resource
Japanese
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