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HYDRAULIC PRESSURE DRIVING DEVICE FOR WORK MACHINE
PROBLEM TO BE SOLVED: To efficiently and securely recover energy to be discarded to a tank in discharging pressure oil from a relief valve when a discharge circuit of a hydraulic pressure pump has a plurality of set values of set pressure of the relief valve.SOLUTION: A discharge circuit of hydraulic pressure pumps 102 and 202 have a plurality of set values of set pressure of relief valves like relief valves 114, 214, 314a, and 314b, and is provided with a plurality of accumulators 51, 52 and 53 differing in set value of lowest working pressure, first and second recovery valves 61 and 62 blocking/opening recovery oil paths 131 and 132, and first and second selector valves 71 and 72 which operate for switching so that pressure oil of the discharge circuit of the hydraulic pressure pumps 102 and 202 is supplied selectively to at least one of the plurality of the accumulators 51, 52 and 53 to be accumulated according to set pressure values of the relief valves 114, 214, 314a and 314b.SELECTED DRAWING: Figure 1
【課題】油圧ポンプの吐出回路がリリーフ弁の設定圧として複数の設定圧を有する場合に、リリーフ弁から圧油を排出する際にタンクに捨てられるエネルギを効率良くかつ確実に回収できるようにする。【解決手段】油圧ポンプ102,202の吐出回路はリリーフ弁114,214,314a,314bのようにリリーフ弁の設定圧として複数の設定圧を有し、最低作動圧力の設定値の異なる複数のアキュムレータ51,52,53と、回収油路131,132を遮断/開放する第1及び第2回収弁61,62と、リリーフ弁114,214,314a,314bの設定圧に合わせて油圧ポンプ102,202の吐出回路の圧油を複数のアキュムレータ51,52,53のうちの少なくとも1つに選択的に供給して蓄圧するよう切換える第1及び第2選択弁71,72とが設けられる。【選択図】 図1
HYDRAULIC PRESSURE DRIVING DEVICE FOR WORK MACHINE
PROBLEM TO BE SOLVED: To efficiently and securely recover energy to be discarded to a tank in discharging pressure oil from a relief valve when a discharge circuit of a hydraulic pressure pump has a plurality of set values of set pressure of the relief valve.SOLUTION: A discharge circuit of hydraulic pressure pumps 102 and 202 have a plurality of set values of set pressure of relief valves like relief valves 114, 214, 314a, and 314b, and is provided with a plurality of accumulators 51, 52 and 53 differing in set value of lowest working pressure, first and second recovery valves 61 and 62 blocking/opening recovery oil paths 131 and 132, and first and second selector valves 71 and 72 which operate for switching so that pressure oil of the discharge circuit of the hydraulic pressure pumps 102 and 202 is supplied selectively to at least one of the plurality of the accumulators 51, 52 and 53 to be accumulated according to set pressure values of the relief valves 114, 214, 314a and 314b.SELECTED DRAWING: Figure 1
【課題】油圧ポンプの吐出回路がリリーフ弁の設定圧として複数の設定圧を有する場合に、リリーフ弁から圧油を排出する際にタンクに捨てられるエネルギを効率良くかつ確実に回収できるようにする。【解決手段】油圧ポンプ102,202の吐出回路はリリーフ弁114,214,314a,314bのようにリリーフ弁の設定圧として複数の設定圧を有し、最低作動圧力の設定値の異なる複数のアキュムレータ51,52,53と、回収油路131,132を遮断/開放する第1及び第2回収弁61,62と、リリーフ弁114,214,314a,314bの設定圧に合わせて油圧ポンプ102,202の吐出回路の圧油を複数のアキュムレータ51,52,53のうちの少なくとも1つに選択的に供給して蓄圧するよう切換える第1及び第2選択弁71,72とが設けられる。【選択図】 図1
HYDRAULIC PRESSURE DRIVING DEVICE FOR WORK MACHINE
作業機械の油圧駆動装置
ITO MASAMICHI (Autor:in) / TAKAHASHI KIWAMU (Autor:in) / MORI KAZUSHIGE (Autor:in) / TAKEBAYASHI KEIFUMI (Autor:in) / NAKAMURA NATSUKI (Autor:in)
02.03.2017
Patent
Elektronische Ressource
Japanisch