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    • 2. 发明申请
    • IMPROVED SERVOVALVE APPARATUS FOR USE IN FLUID SYSTEMS
    • 改进用于流体系统的伺服装置
    • WO1991011623A1
    • 1991-08-08
    • PCT/US1991000669
    • 1991-01-30
    • SARCOS GROUP
    • SARCOS GROUPJACOBSEN, Stephen, C.IVERSEN, Edwin, K.KNUTTI, David, F.DAVIS, Clark, C.
    • F15B13/02
    • F15C3/12Y10T137/2322
    • A servovalve apparatus for use in fluid systems which comprises an elongate flexible valve element (60, 408) having a fixed end and a free, moveable end, and a conductive coil (42) which surrounds at least a portion of the valve element adjacent its fixed end. An armature (64) is secured to the valve element so as to be adjacent the conductive coil. Two permanent magnets (72, 73) are provided adjacent the armature on opposite sides thereof, the magnets being positioned such that one magnet presents north magnetic pole facing the armature and the other magnet presents a south magnetic pole facing the armature. A receiving plate (80, 428) is provided adjacent the free end of the valve element, the receiving plate having one or more channels (440, 320, 324) formed therein for receiving fluid, and a bore for delivering fluid (432, 436, 84, 86). Preferably, the channels and bore in the receiving plate originate within and communicate with a concave socket (28, 430) in the receiving plate which has substantially the same radius of curvature as the path over which the free end of the valve element moves during flexure. A deflection cup (412) is disposed on the free end of the valve element to move adjacent the surface of the concave socket, and selectively redirect fluid from the bore to one of the channels.