| 摘要 |
<p>A displacement controlled hydraulic proportional valve (10) is provided with a dashpot (44) disposed between a main valve spool (16) and a pilot valve spool (22) to stabilize the proportional valve (10). The dashpot (44) includes a bore (46) in a spring retainer (41) engaging the main valve spool (16) and a plunger (47) axially extending from a spring retainer (38) engaging the pilot valve spool (22) with the plunger extending into the bore (46) to define a dashpot chamber (48). The plunger is sized to permit restricted fluid flow thereby when the spools move relative to each other thereby dampening relative movement between the valve spools. Dampening the relative movement between the valve spools drastically reduces the amount of overshoot by the main valve spool.</p> |
