| 摘要 |
<p>An electro hydraulic servo valve assembly has a valve housing and a spool rotatably fitted to the inside of the housing. A number of ports are off-settedly provided along the length of the valve housing A plurality of orifices are provided along the length of the spool. The positioning of the orifices and the ports are such that only one set of orifices may be aligned with a corresponding set of ports at any one time. The spool has one end coupled to a servo motor so that the servo motor may drivingly rotate the spool relative to the valve body. The other end of the spool is open so that a fluid passage is established between the interior of the spool and any one of the orifices.</p> |
