| 摘要 |
<p>A servovalve apparatus for use in fluid systems which comprises an elongate flexible valve element (408) having a fixed end and a free, moveable end, and a conductive coil which surrounds at least a portion of the valve element (408) adjacent its fixed end. An armature is secured to the valve element (408) so as to be adjacent the conductive coil. Two permanent magnets, are provided adjacent the armature on opposite sides thereof, the magnets being positioned such that one magnet presents a north magnetic pole facing the armature and the other magnet presents a south magnetic pole facing the armature. A receiving plate (428) is provided adjacent the free end of the valve element (408), the receiving plate (428) having one or more channels (432,436) formed therein for receiving fluid, and a bore (440) for delivering fluid. Preferably, the channels (432,436) and bore (440) in the receiving plate (428) originate within and communicate with a concave socket in the receiving plate (428) which has substantially the same radius of curvature as the path over which the free end of the valve element (408) moves during flexure. A deflection cup (412) is disposed on the free end of the valve element (408) to move adjacent the surface of the concave socket and selectively redirect fluid from the bore (440) to one of the channels (432,436). <IMAGE></p> |
