公开(公告)号：EP2592263B1

公开(公告)日：2017-12-20

申请号：EP11425269.5

申请日：2011-11-09

申请人： Poclain Hydraulics Industriale S.R.L.

发明人： Rigolon, Enrico ,  Corradini, Enzo

IPC分类号： F03C1/04

CPC分类号： F03C1/03 ,  F03C1/003 ,  F03C1/045 ,  F03C1/0681 ,  F03C1/0684 ,  F15B11/0445

摘要： A hydraulic actuation unit, particularly for controlling the starting and stopping of hydraulic motors, comprising: - a first main circuit (2) and a second main circuit (3), which are adapted to connect selectively a supply of pressurized working liquid and a tank to a hydraulic motor (100); - a first recirculation circuit (4) and a second recirculation circuit (5) for returning respectively a fraction of the working liquid from the second main circuit (3) to the first main circuit (2) and vice versa; - a counterbalancing valve (6), which comprises a shuttle (7) that can switch to a first end position (P1) and to a second end position (P2), which correspond to the actuation of the motor (100) with mutually opposite directions of rotation, and comprises a first passage channel (8) and a second passage channel (9), which are arranged respectively along the first main circuit (2) and along the second main circuit (3); - a first discharge channel (10) and a second discharge channel (11), for the connection respectively of the first main circuit (2) to the second recirculation circuit (5) and of the second main circuit (3) to the first recirculation circuit (4). The shuttle (7) comprises a first check valve (50) and a second check valve (70) respectively arranged in the first passage channel (8) and in the second passage channel (9). The first check valve (50) comprising at least one first flow control element (51) that can move from an open position, for the passage of the working liquid along the first passage channel (8) and therefore along the first main circuit (2), to a closure position, for closing the first passage channel (8) and therefore the first main circuit (2) and vice versa. The second check valve (70) comprises at least one second flow control element (71) that can move from an open position for the passage of the working liquid along the second passage channel (9) and therefore along the second main circuit (3) to a closure position for the closure of the second passage channel (9) and therefore of the second main circuit (3) and vice versa. The peculiarity of the invention resides in that the first check valve (50) and the second check valve (70) respectively are provided with first damping means (52) and second damping means (72) in order to slow down the passage movement respectively of the first flow control element (51) and of the second flow control element (71) from the respective closure position to the respective open position.

公开(公告)号：EP2592263A1

公开(公告)日：2013-05-15

申请号：EP11425269.5

申请日：2011-11-09

申请人： Poclain Hydraulics Industriale S.R.L.

发明人： Rigolon, Enrico ,  Corradini, Enzo

IPC分类号： F03C1/04

CPC分类号： F03C1/03 ,  F03C1/003 ,  F03C1/045 ,  F03C1/0681 ,  F03C1/0684 ,  F15B11/0445

摘要： A hydraulic actuation unit, particularly for controlling the starting and stopping of hydraulic motors, comprising:
- a first main circuit (2) and a second main circuit (3), which are adapted to connect selectively a supply of pressurized working liquid and a tank to a hydraulic motor (100);
- a first recirculation circuit (4) and a second recirculation circuit (5) for returning respectively a fraction of the working liquid from the second main circuit (3) to the first main circuit (2) and vice versa;
- a counterbalancing valve (6), which comprises a shuttle (7) that can switch to a first end position (P1) and to a second end position (P2), which correspond to the actuation of the motor (100) with mutually opposite directions of rotation, and comprises a first passage channel (8) and a second passage channel (9), which are arranged respectively along the first main circuit (2) and along the second main circuit (3);
- a first discharge channel (10) and a second discharge channel (11), for the connection respectively of the first main circuit (2) to the second recirculation circuit (5) and of the second main circuit (3) to the first recirculation circuit (4).
The shuttle (7) comprises a first check valve (50) and a second check valve (70) respectively arranged in the first passage channel (8) and in the second passage channel (9). The first check valve (50) comprising at least one first flow control element (51) that can move from an open position, for the passage of the working liquid along the first passage channel (8) and therefore along the first main circuit (2), to a closure position, for closing the first passage channel (8) and therefore the first main circuit (2) and vice versa. The second check valve (70) comprises at least one second flow control element (71) that can move from an open position for the passage of the working liquid along the second passage channel (9) and therefore along the second main circuit (3) to a closure position for the closure of the second passage channel (9) and therefore of the second main circuit (3) and vice versa.
The peculiarity of the invention resides in that the first check valve (50) and the second check valve (70) respectively are provided with first damping means (52) and second damping means (72) in order to slow down the passage movement respectively of the first flow control element (51) and of the second flow control element (71) from the respective closure position to the respective open position.

摘要翻译： 一种液压致动单元，特别是用于控制液压马达的起动和停止，包括： - 第一主回路（2）和第二主回路（3），其适于选择性地连接加压工作液体和油箱 到液压马达（100）; - 第一再循环回路（4）和第二再循环回路（5），用于分别将来自第二主回路（3）的工作液体的一部分返回到第一主回路（2），反之亦然; - 平衡阀（6），其包括能够切换到相对于所述电动机（100）的致动的第一端部位置（P1）和第二端部位置（P2）的梭子（7） 旋转方向，包括分别沿着第一主电路（2）和第二主电路（3）布置的第一通道（8）和第二通道（9）。 - 第一排放通道（10）和第二排放通道（11），用于将第一主回路（2）与第二再循环回路（5）和第二主回路（3）分别连接到第一再循环 电路（4）。 梭子（7）包括分别布置在第一通道（8）和第二通道（9）中的第一止回阀（50）和第二止回阀（70）。 第一止回阀（50）包括至少一个可从打开位置移动的第一流量控制元件（51），用于工作液体沿着第一通道（8）的通过，因此沿着第一主回路（2） ）到关闭位置，用于关闭第一通道（8）并因此封闭第一主电路（2），反之亦然。 第二止回阀（70）包括至少一个第二流量控制元件（71），该第二流量控制元件能够从打开位置移动，以使工作液体沿着第二通道（9）通过，因此沿着第二主回路（3）移动， 到第二通道（9）和第二主回路（3）的关闭的关闭位置，反之亦然。 本发明的特征在于，第一止回阀（50）和第二止回阀（70）分别设有第一阻尼装置（52）和第二阻尼装置（72），以便分别减慢通道运动 第一流量控制元件（51）和第二流量控制元件（71）从相应的关闭位置到相应的打开位置。