公开(公告)号：US4739650A

公开(公告)日：1988-04-26

申请号：US932055

申请日：1986-11-18

申请人： Takeo Matsuura ,  Yukio Mori ,  Toshio Tanahashi ,  Akira Muramatsu ,  Ryo Nagasaka ,  Mikiyasu Kouketsu ,  Yukio Sawada ,  Hiroshi Hasegawa

发明人： Takeo Matsuura ,  Yukio Mori ,  Toshio Tanahashi ,  Akira Muramatsu ,  Ryo Nagasaka ,  Mikiyasu Kouketsu ,  Yukio Sawada ,  Hiroshi Hasegawa

IPC分类号： G01F1/24 ,  G01M15/00

CPC分类号： G01F1/24

摘要： An apparatus for measuring a flow rate of gas comprises a gas passage through which the gas to be measured flows in an axial direction thereof, a movable member linearly movable being disposed in the gas passage in a gas flow direction, a flow pipe providing therein the gas passage, a cross-sectional area of the flow pipe being increased along the gas flow direction in at least over a moving range of the movable member, a rod secured to the movable member to extend from the movable member along the gas flow direction, a bearing for bearing the rod for movement in response to moving of the movable member, the bearing being disposed in the gas passage and secured to the flow pipe, a helical spring for urging the movable member towards a direction opposite to the gas flow direction, a potentiometer for converting an amount of displacement of the rod into an electric signal, an amount of the displacement of the rod corresponding to that of movement of the movable member, a first cylinder closed at one end thereof by the movable member and opened at the other end thereof, the first cylinder extending along the gas flow direction, and a second cylinder disposed in the gas passage and secured to the flow pipe, the second cylinder being closed at one end thereof and opened at the other end thereof, the second cylinder being engaged at the other end thereof with the other end of the first cylinder through a minute clearance therebetween.

摘要翻译： 用于测量气体流量的装置包括：待测气体沿其轴向流过的气体通道，沿气体流动方向设置在气体通道中的可直线移动的可动构件， 气流通道，流动管的横截面积至少在可移动部件的移动范围内沿气体流动方向增加，杆固定到可动件以沿着气体流动方向从可动件延伸， 用于响应于可移动构件的移动而支撑杆的运动的轴承，所述轴承设置在气体通道中并固定到流量管，用于将可动构件朝向与气体流动方向相反的方向推动的螺旋弹簧， 用于将杆的位移量转换为电信号的电位计，与可动构件的移动相对应的杆的位移量，第一气缸c 其一端由可动件在其另一端处开放，第一气缸沿着气体流动方向延伸，第二气缸设置在气体通道中，并固定在流量管上，第二气缸在一侧闭合 在其另一端开口，第二气缸的另一端与第一气缸的另一端通过它们之间的微小间隙接合。