| 摘要 |
<p>An electrohydraulic pressure-regulating valve has a valve housing formed with a chamber and with an intake passage and an outlet passage opening at spaced-apart locations into the chamber, a valve member in the chamber between these locations and formed with a bore through which fluid can flow between the locations, this bore forming adjacent the outlet passage with a valve seat, a valve body in the chamber engageable with the valve seat to block flow through the bore, and means for urging the body against the seat. The valve has a laminar flow throttle in the bore between the seat and the intake passage. With this system substantially greater noise and vibration reduction is achieved in the range about 400 Herz than has been hitherto possible. Since the throttle is constituted as a laminar-flow throttle and is positioned immediately upstream of the valve body and valve seat, it only makes a nominal pressure drop, so that it does not interfere with operation of the valve.</p> |
