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公开(公告)号：EP0608415B1
公开(公告)日：1997-10-22
申请号：EP92903711.7
申请日：1992-01-23
发明人： YOSHIDA, Nobumi Kawasaki Factory of K. K. Komatsu , AKIYAMA, Teruo Kawasaki Factory of K. K. Komatsu , KARAKAMA, Tadao Kawasaki Factory of K. K. Komatsu
CPC分类号： E02F9/2225 , E02F9/22 , E02F9/2232 , E02F9/2285 , F15B13/0417 , Y10T137/87169 , Y10T137/87185 , Y10T137/87193
摘要： A hydraulic circuit provided with a pressure compensation valve and intended to improve response function thereof while preventing operational delay proportionate to stroke volume of said valve, which is in such a structure that: a pressure compensation valve (3) is disposed between the outlet side of a hydraulic pump (1) and the inlet side of a direction control valve (4) and pushed toward a position (D) of large opening area by pressure of a first pressure receiving part (6) as well as toward a position (E) of small opening area by pressure of a second pressure receiving part (8); said first pressure receiving part (6) is connected to the outlet side of the direction control valve (4) whereas said second pressure receiving part (8) to the inlet side of said valve (4); a cylinder unit (30) is provided for pushing said pressure compensation valve (3) toward the position (D) of large opening area; a piston advance chamber (31) is connected to an external hydraulic pressure source (11) and a piston withdrawal chamber (34) to the first pressure receiving part (6), so that the pressure compensation valve (3) is held in position (D) of large opening area when the direction control valve (4) is in the neutral position (A).
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公开(公告)号：EP0608415A1
公开(公告)日：1994-08-03
申请号：EP92903711.7
申请日：1992-01-23
发明人： YOSHIDA, Nobumi Kawasaki Factory of K. K. Komatsu , AKIYAMA, Teruo Kawasaki Factory of K. K. Komatsu , KARAKAMA, Tadao Kawasaki Factory of K. K. Komatsu
CPC分类号： E02F9/2225 , E02F9/22 , E02F9/2232 , E02F9/2285 , F15B13/0417 , Y10T137/87169 , Y10T137/87185 , Y10T137/87193
摘要： A hydraulic circuit provided with a pressure compensation valve and intended to improve response function thereof while preventing operational delay proportionate to stroke volume of said valve, which is in such a structure that: a pressure compensation valve (3) is disposed between the outlet side of a hydraulic pump (1) and the inlet side of a direction control valve (4) and pushed toward a position (D) of large opening area by pressure of a first pressure receiving part (6) as well as toward a position (E) of small opening area by pressure of a second pressure receiving part (8); said first pressure receiving part (6) is connected to the outlet side of the direction control valve (4) whereas said second pressure receiving part (8) to the inlet side of said valve (4); a cylinder unit (30) is provided for pushing said pressure compensation valve (3) toward the position (D) of large opening area; a piston advance chamber (31) is connected to an external hydraulic pressure source (11) and a piston withdrawal chamber (34) to the first pressure receiving part (6), so that the pressure compensation valve (3) is held in position (D) of large opening area when the direction control valve (4) is in the neutral position (A).
摘要翻译： 本发明提供一种液压回路，该液压回路具有压力补偿阀，其目的在于提高响应功能，同时防止与所述阀的行程容积成比例的操作延迟，其结构为：压力补偿阀（3）设置在出口侧 （1）和方向控制阀（4）的入口侧，并且通过第一压力接收部分（6）的压力朝向位置（E）推向大开口面积的位置（D） 通过第二压力接收部分（8）的压力而形成小开口面积; 所述第一压力接收部分（6）连接到所述方向控制阀（4）的出口侧，而所述第二压力接收部分（8）连接到所述阀（4）的入口侧; 设有用于将所述压力补偿阀（3）推向大开口面积位置（D）的缸体单元（30） 一个活塞提前室（31）与一个外部液压源（11）和一个活塞提取室（34）连接到第一压力接收部分（6），使得压力补偿阀（3）保持在位置 D）方向控制阀（4）处于空档位置（A）时的大开口面积。
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