Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINE
PROBLEM TO BE SOLVED: To perform total torque control with high accuracy, to effectively utilize rated output torque of a motor, and to improve mountability by accurately detecting absorption torque of a hydraulic pump at one side with pure hydraulic constitution, and feeding-back the same to a hydraulic pump at the other side.SOLUTION: A first torque controller of a first pump control unit in a hydraulic driving device includes: a torque feedback circuit 30 to which a discharge pressure of a first hydraulic pump 1a and a load sensing driving pressure are led and which corrects and outputs a discharge pressure of a second hydraulic pump 1b so as to simulate absorption torque of the second hydraulic pump 1b; and torque feedback pistons 31a, 31b to which the output pressure of the torque feedback circuit 30 is led and which control a capacity of the first hydraulic pump 1a so that a capacity of the first hydraulic pump 1a is reduced and the maximum torque is reduced according as the output pressure becomes higher. The torque feedback circuit 30 has partial-pressure throttle portions 34a, 34b, partial-pressure valves 35a, 35b, and relief valves 37a, 37b.
【課題】他方の油圧ポンプの吸収トルクを純油圧的な構成で精度良く検出して一方の油圧ポンプ側にフィードバックすることで、全トルク制御を精度良く行い、原動機の定格出力トルクを有効利用しかつ搭載性を向上させる。【解決手段】第１油圧ポンプ１ａの吐出圧とロードセンシング駆動圧力とが導かれ、第２油圧ポンプ１ｂの吸収トルクを模擬するよう第２油圧ポンプ１ｂの吐出圧を補正して出力するトルクフィードバック回路３０と、このトルクフィードバック回路３０の出力圧が導かれ、この出力圧が高くなるにしたがって第１油圧ポンプ１ａの容量を減少させ最大トルクが減少するよう第１油圧ポンプ１ａの容量を制御するトルクフィードバックピストン３１ａ，３１ｂとを設ける。トルクフィードバック回路３０は分圧絞り部３４ａ，３４ｂ、分圧弁３５ａ，３５ｂ、リリーフ弁３７ａ，３７ｂを有する。【選択図】図１Ａ
HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINE
PROBLEM TO BE SOLVED: To perform total torque control with high accuracy, to effectively utilize rated output torque of a motor, and to improve mountability by accurately detecting absorption torque of a hydraulic pump at one side with pure hydraulic constitution, and feeding-back the same to a hydraulic pump at the other side.SOLUTION: A first torque controller of a first pump control unit in a hydraulic driving device includes: a torque feedback circuit 30 to which a discharge pressure of a first hydraulic pump 1a and a load sensing driving pressure are led and which corrects and outputs a discharge pressure of a second hydraulic pump 1b so as to simulate absorption torque of the second hydraulic pump 1b; and torque feedback pistons 31a, 31b to which the output pressure of the torque feedback circuit 30 is led and which control a capacity of the first hydraulic pump 1a so that a capacity of the first hydraulic pump 1a is reduced and the maximum torque is reduced according as the output pressure becomes higher. The torque feedback circuit 30 has partial-pressure throttle portions 34a, 34b, partial-pressure valves 35a, 35b, and relief valves 37a, 37b.
【課題】他方の油圧ポンプの吸収トルクを純油圧的な構成で精度良く検出して一方の油圧ポンプ側にフィードバックすることで、全トルク制御を精度良く行い、原動機の定格出力トルクを有効利用しかつ搭載性を向上させる。【解決手段】第１油圧ポンプ１ａの吐出圧とロードセンシング駆動圧力とが導かれ、第２油圧ポンプ１ｂの吸収トルクを模擬するよう第２油圧ポンプ１ｂの吐出圧を補正して出力するトルクフィードバック回路３０と、このトルクフィードバック回路３０の出力圧が導かれ、この出力圧が高くなるにしたがって第１油圧ポンプ１ａの容量を減少させ最大トルクが減少するよう第１油圧ポンプ１ａの容量を制御するトルクフィードバックピストン３１ａ，３１ｂとを設ける。トルクフィードバック回路３０は分圧絞り部３４ａ，３４ｂ、分圧弁３５ａ，３５ｂ、リリーフ弁３７ａ，３７ｂを有する。【選択図】図１Ａ
HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINE
建設機械の油圧駆動装置
TSURIGA YASUTAKA (Autor:in) / TAKAHASHI KIWAMU (Autor:in) / OKAZAKI KOJI (Autor:in) / NOBESAWA HIROYUKI (Autor:in) / YAMADA KENJI (Autor:in)
08.06.2015
Patent
Elektronische Ressource
Japanisch