Pressure measuring system for gas flow meter
    1.
    发明授权
    Pressure measuring system for gas flow meter 失效
    气体流量计压力测量系统

    公开(公告)号:US5877430A

    公开(公告)日:1999-03-02

    申请号:US876086

    申请日:1997-06-13

    IPC分类号: G01F1/10 G01F1/12 G01F15/04

    CPC分类号: G01F1/10 G01F1/125 G01F15/046

    摘要: A turbine gas flow meter (10) includes a meter body (12) including an inlet portion (24) having an inlet body (32) mounted therein, with an exit end (30) of the body inlet portion being defined at an internal plenum (22) of the meter body, and a removable turbine meter measuring module (44) including a rotor assembly (48) which is inserted into the plenum with an inlet end (127) of the rotor assembly and the exit end of the inlet portion defining an interface therebetween. A closed space (114) is formed about the rotor assembly within the plenum between an inner wall (106) of the body and outer walls (116, 118) of the rotor assembly. An axial gap (128) between a surface (130) of the rotor assembly inlet end and a surface (132) of the body inlet portion exit end, and/or radial notches in either of the surfaces (130, 132), provide fluid pressure communication from the interface to the closed space. A pressure tap (138) extends through the body into the closed space for measuring pressure within the closed space.

    摘要翻译: 涡轮气体流量计(10)包括仪表主体(12),其包括具有安装在其中的入口体(32)的入口部分(24),所述主体入口部分的出口端(30)限定在内部增压室 (22),以及可拆卸涡轮仪表测量模块(44),其包括转子组件(48),所述转子组件(48)插入到所述增压室中,所述转子组件具有所述转子组件的入口端(127)和所述入口部分的出口端 定义其间的接口。 在本体的内壁(106)和转子组件的外壁(116,118)之间的集气室内围绕转子组件形成封闭空间(114)。 在转子组件入口端的表面(130)与主体入口部分出口端的表面(132)和/或任一表面(130,132)中的/或径向凹口之间的轴向间隙(128)提供流体 从界面到封闭空间的压力通讯。 压力分接头(138)穿过主体延伸到封闭空间中,用于测量封闭空间内的压力。

    Method and apparatus for measuring and providing corrected gas flow
    2.
    发明授权
    Method and apparatus for measuring and providing corrected gas flow 失效
    用于测量和提供校正气流的方法和装置

    公开(公告)号:US4829449A

    公开(公告)日:1989-05-09

    申请号:US826332

    申请日:1986-02-05

    摘要: A method and apparatus is disclosed for measuring flowing gas and at least one variable for calculating gas flow corrected to a base value of that variable. Illustratively, the measured variables are temperature and pressure, and devices are employed for measuring the temperature T.sub.f and pressure P.sub.f of the gas flowing through a conduit, and means in the illustrative form of a flow meter for measuring the volume V.sub.f of the gas flowing through the conduit. Calculating means in the illustrative form of a programmed microprocessor is employed to calculate the corrected gas volume to base conditions in accordance with an expression including the supercompressibility factor. The supercompressibility factor is calculated according to an equation involving only whole number exponentiation and a selected set of coefficients. The calculation means selects a particular set of these coefficients in accordance with indications of pressure and/or temperature.

    摘要翻译: 公开了一种用于测量流动气体和至少一个用于计算校正到该变量的基值的气体流量的变量的方法和装置。 示例性地,测量的变量是温度和压力,并且使用装置来测量流过导管的气体的温度Tf和压力Pf,以及用于测量流过的气体的体积Vf的流量计的说明性形式的装置 导管。 采用编程微处理器的说明形式的计算装置根据包含超压缩因子的表达式来计算校正气体体积与基础条件。 超级压缩因子根据仅涉及整数乘数和所选择的一组系数的方程来计算。 计算装置根据压力和/或温度的指示来选择这些系数的特定集合。