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    Fluid actuated control system
    1.
    发明授权
    Fluid actuated control system 失效
    流体动力控制系统

    公开(公告)号：US3807277A

    公开(公告)日：1974-04-30

    申请号：US24200572

    申请日：1972-04-07

    申请人： US ARMY

    发明人： LASPISA R ,  WOODS G

    IPC分类号： F15B9/00 ,  F15B13/16

    CPC分类号： F15B9/00

    摘要： A rotatable shaft restrained from axial displacement is maintained at a pre-selected angular position by a fluid actuated control system comprising a sensing device disposed for sensing angular displacement of the shaft from the pre-selected position. The sensing device generates signals proportional to the displacement sensed and transmits them to a proportional fluidic amplifier which divides a controlled fluid flow proportional to the signals and directs the proportionally divided flows to opposite ends of a cylinder thereby actuating a piston for linear displacement therein proportional to the angular displacement of the shaft. A motion converting device converts linear displacement of the piston to angular displacement of the shaft.

    摘要翻译： 通过流体致动的控制系统将受轴向位移限制的可旋转轴保持在预先选定的角度位置，该控制系统包括传感装置，该传感装置被设置用于感测轴与预选位置的角位移。 感测装置产生与所检测的位移成比例的信号，并将其传送到比例流体放大器，该比例流体放大器将受控的流体流量与信号成比例地分流，并将比例分配的流量引导到气缸的相对端，从而致动活塞，用于与 轴的角位移。 运动转换装置将活塞的线性位移转换成轴的角位移。

    Double acting linear actuator
    10.
    发明授权
    Double acting linear actuator 失效
    双作用线性执行机构

    公开(公告)号：US4721027A

    公开(公告)日：1988-01-26

    申请号：US321444

    申请日：1981-11-16

    申请人： William F. Keller ,  Richard D. Sibley

    发明人： William F. Keller ,  Richard D. Sibley

    IPC分类号： F15B9/07 ,  F15B9/00 ,  F15B9/09 ,  F15B20/00 ,  F16K31/42 ,  F15B15/17

    CPC分类号： F16K31/42 ,  F15B9/00

    摘要： An actuator for moving a valve or other controlled part in correspondence with variations in an input signal and including a piston movable in opposite directions within a cylinder and having a smaller effective area exposed to fluid in a first chamber at one side of the piston than to fluid in a second chamber at the opposite side of the piston, a pressure fluid source delivering pressurized fluid to the first of these chambers and delivering pressurized fluid to the second chamber through a three way valve having a body containing inlet and outlet openings and a valve element movable relative thereto in a manner varying the pressure delivered to the second chamber of the cylinder. A control element downstream of the three way valve is actuable by variations in an input signal to correspondingly vary the discharge of fluid which flows through the specified outlet opening in the three way valve body, and an automatic mechanism responsive to variations in pressure between that outlet opening in the three way valve body and the control element moves the valve element of the three way valve in correspondence with the changes in pressure. A feedback mechanism between the piston and the control element balances the forces actuating that element in a predetermined desired setting of the piston.

    摘要翻译： 用于与输入信号的变化相对应地移动阀门或其他受控部件的致动器，包括可在气缸内沿相反方向运动的活塞，并且在活塞一侧的第一腔室中暴露于流体的有效面积小于 流体在活塞的相对侧的第二室中，压力流体源将加压流体输送到这些腔室中的第一个腔室，并且通过具有包含入口和出口开口的主体的三通阀将加压流体输送到第二腔室， 元件可以以改变输送到气缸的第二腔室的压力的方式相对于其移动。 三通阀下游的控制元件可通过输入信号的变化而致动，以相应地改变流过三通阀体中的特定出口的流体的排放，以及响应于该出口处的压力变化的自动机构 在三通阀体中打开，控制元件与压力变化对应地移动三通阀的阀元件。 活塞和控制元件之间的反馈机构平衡在活塞的预定期望设置中致动该元件的力。