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    Fluid pressure ration sensing device
    10.
    发明授权
    Fluid pressure ration sensing device 失效
    流体压力传感装置

    公开(公告)号：US3707159A

    公开(公告)日：1972-12-26

    申请号：US3707159D

    申请日：1971-03-24

    Applicant: BENDIX CORP

    Inventor： EASTMAN JAMES M

    IPC: F15B5/00 ,  F15B21/00 ,  F15C1/12

    CPC classification number: F15B21/00 ,  F15B5/00 ,  Y10T137/2098

    Abstract: A pressure ratio sensing device for generating an output fluid pressure differential signal in proportion to the ratio of two sensed fluid pressures. The output differential signal is derived from a pressurized supply fluid which flows subsonically through a first restriction, a second restriction defining a power jet for a dual output proportional acting fluidic amplifier having opposed control fluid ports, a vortex amplifier having a radial supply port and a tangential control port, and a third restriction to the lower of the two sensed fluid pressures. The fluid pressure intermediate the first and second restrictions is controlled to maintain the same in excess of the higher of the two sensed fluid pressures. The higher of the two sensed pressures is applied to one of the opposed control fluid ports of the proportional amplifier to bias the power jet thereof toward one of the dual outputs which, in turn, is vented to the tangential port of the vortex amplifier. The remaining of the dual outputs is vented to the radial supply port of the vortex amplifier as well as to the second of the control ports of the proportional amplifier. The pressure drop across the third restriction provides the output pressure differential signal which varies in proportion to the ratio of the sensed two fluid pressures. The effective flow area of the third restriction is such that the pressure differential thereacross does not exceed the expected minimum pressure of the lower of the two sensed fluid pressures.

    Abstract translation: 一种压力比检测装置，用于与两个检测到的流体压力的比率成比例地产生输出流体压差信号。 输出差分信号来源于通过第一限制流动的加压供应流体，限定用于具有相对控制流体端口的双输出比例作用流体放大器的功率射流的第二限制，具有径向供应端口和 切向控制端口，以及对两个感测流体压力中较低者的第三限制。 控制第一和第二限制之间中间的流体压力以保持超过两个感测到的流体压力的较高者。 两个感测压力中的较高者被施加到比例放大器的相对的控制流体端口之一，以将其功率射流偏压到双输出中的一个，这又反过来被排放到涡流放大器的切向端口。 剩余的双输出被排放到涡流放大器的径向供应端口以及比例放大器的第二个控制端口。 跨越第三限制的压降提供输出压力差信号，该信号与检测到的两个流体压力的比例成比例地变化。 第三限制的有效流动面积使得其中的压力差不超过两个感测流体压力中较低者的预期最小压力。

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