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    • 1. 发明授权
    • Mass flowmeter
    • 质量流量计
    • US4031758A
    • 1977-06-28
    • US645231
    • 1975-12-29
    • Nobuo Doi
    • Nobuo Doi
    • G01F1/78G01F1/34
    • G01F1/785
    • A pressure-difference type mass flowmeter with constant volumetric recirculation effected by a pump, with an annular flow path having four junctions each having a spur path. One pair of the alternate spur paths serve as inlet and outlet of the fluid flow to be measured, while the other pair of the alternate spur paths are connected to the recirculation pump. Four sections of the annular flow path defined by the four junctions are each provided with static fluid pressure sensing point, and a transducer gives a readout of difference in average static pressures of one pair of the alternate sensing points and of the other pair of the alternate sensing points. This readout is linearly proportional to the fluid mass flow rate.
    • 具有由泵实现的具有恒定体积再循环的压力差型质量流量计,其环形流动路径具有每个具有刺入路径的四个结。 一对替代的辅助路径用作要测量的流体流的入口和出口,而另一对替代的支路连接到再循环泵。 由四个连接点限定的环形流路的四个部分均设有静态流体压力检测点,并且换能器给出一对交替检测点和另一对交替检测点的平均静压差的读数 传感点。 该读数与流体质量流量成线性比例。