G - Physics – 01 – F
Patent
G - Physics
01
F
G01F 1/05 (2006.01) B63H 1/26 (2006.01) G01F 1/10 (2006.01) G01F 1/12 (2006.01)
Patent
CA 2334218
A turbine meter (20) for measuring the volume of fluid flowing through a conduit includes an elongated housing (22) having an upstream end and a downstream end and a rotor (38) mounted within the housing. A plurality of turbine blades (40) are mounted on the rotor at an angle with respect to the axis of rotation of the rotor which causes each of the rotor blades to have a high pressure surface (60) which faces the upstream end of the housing. Each of the rotor blades also has a trailing edge (66) closest to the downstream end of the housing. An extension (68) is included at the trailing edge on the high pressure surface of each rotor blade, causing the percentage of error of the accuracy of the meter across a chosen operating range to be within predetermined limits.
L'invention concerne débitmètre à turbine (20) pour mesurer le volume d'un fluide s'écoulant à travers un passage. Le débitmètre à turbine comprend une enveloppe (22) allongée présentant une extrémité amont et une extrémité aval, et un rotor (38) monté à l'intérieur de l'enveloppe (22). Plusieurs aubes de turbine (40) sont montées sur le rotor de manière à former angle avec l'axe de rotation du rotor, ce qui confère à chaque aube du rotor une surface haute pression (60) faisant face à l'extrémité amont de l'enveloppe. Chaque aube du rotor inclut également une partie arrière (66) à proximité immédiate de l'extrémité aval de l'enveloppe. La partie arrière comprend une extension (68) sur la surface haute pression équipée d'un rotor muni de pales à précision améliorée.
American Meter Company
Rolston George A.
LandOfFree
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