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    Multiple tow-stage electrohydraulic servovalve apparatus
    4.
    发明授权
    Multiple tow-stage electrohydraulic servovalve apparatus 失效
    多级牵引电动液压伺服阀装置

    公开(公告)号：US3874405A

    公开(公告)日：1975-04-01

    申请号：US39126873

    申请日：1973-08-24

    Applicant: MOOG INC

    Inventor： THAYER WILLIAM J

    IPC: F15B13/043 ,  F16K11/00

    CPC classification number: F15B13/0438 ,  Y10T137/86598 ,  Y10T137/86614 ,  Y10T137/87209

    Abstract: Two or more independently controllable two-stage electrohydraulic servovalves are collectively serviced by a single fluid supply and a single fluid return although each servovalve is associated with its own load actuator, by providing each servovalve with a first stage symmetrical hydraulic amplifier and with a second stage valve spool associated with metering ports, the hydraulic amplifiers of the various servovalves being connected in series fluid flow communication, so as to maintain quiescent flow essentially the same as for one such servovalve independently, and the metering ports of the various servovalves being in parallel fluid flow communication with the fluid supply and fluid return so as to be capable of developing full differential pressure across the load for each servovalve.

    Abstract translation: 两个或多个可独立控制的两级电动液压伺服阀由单个流体供应和单个流体返回共同维护，尽管每个伺服阀与其自己的负载致动器相关联，通过为每个伺服阀提供第一级对称液压放大器和第二级 与计量端口相关联的阀芯，各种伺服阀的液压放大器串联连接流体流动连通，以保持静态流量基本上与一个这样的伺服阀独立地相同，并且各种伺服阀的计量端口是并联流体 与流体供应和流体返回的流动连通，以便能够为每个伺服阀跨越负载产生完全差压。

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