| 摘要 |
<p>The valve comprises a shutter (11) which cooperates with a seat (12), and a spring (13) tending to press the shutter onto the seat, so as to limit the flow rate of a hydraulic fluid passing through the valve. In order to vary the force exerted by the spring (13) on the shutter (11) as a function of the flow rate through the valve, the latter comprises a movable piston (14) on which the spring (13) bears, the movable piston being displaced in a cylinder (15) which it separates into two chambers (15a, 15b). One of these chambers is in communication with the hydraulic fluid downstream or upstream of the valve, the other chamber being in communication with an intermediate space (23) whose shutter (11) constitutes a first passage orifice and which is equipped, at a second passage orifice (24), with a restriction (25) defining a pressure drop which increases with the flow rate passing through it.</p> |
