| 摘要 |
The invention relates to a valve device comprising a valve housing (2) and a valve piston (4) arranged in an axially displaceable manner in a piston bore (3) of the valve housing (2), via which piston a first load connection (A) and a second load connection (B) can alternately be connected to a pressure connection (P) and to a tank connection (T1, T2) under the action of a first solenoid magnet (5) and a second solenoid magnet (6), wherein the valve piston (4) can be displaced from a centered, preferably middle idle position for connecting the first load connection (A) to the pressure connection (P) and the second load connection (B) to the tank connection (T1, T2) in a first direction, and it can be displaced for the reverse fluid-conducting connection of the connections (A, B, P, T1, T2) in an opposite direction, wherein a first pilot control chamber (7) is provided, which pressurizes a first piston back side (8) of the valve piston (4), and a second pilot control chamber (9) is provided, which pressurizes a second piston back side (10), and wherein the pressure in the pilot control chambers (7, 9) can be controlled by means of a first and a second pilot control piston (12 and 13) which can be moved by means of the first or second solenoid magnets (5, 7), wherein the first and second pilot control chamber (7, 9) are connected via a fluid-conducting connection (11) to the pressure connection (P), and the pilot control pistons (12, 13) each open or close a fluid-conducting connection (14) between the pilot control chambers (7, 9) and the tank connection (T1, T2). |
