Oval gear meter

G - Physics – 01 – F

Patent

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Details

G01F 3/10 (2006.01) G01D 5/12 (2006.01)

Patent

CA 2651571

The invention relates to an oval gear meter for flow measurement, the meter comprising: two oval-shaped gears (1, 2) arranged to rotate in synchronism in a chamber provided in a housing (3), through which chamber a medium to be measured is arranged to flow, the rotating motion of the gears (1, 2) being pro-portional to the flow rate. The meter is equipped with means for detecting the rotating motion of the oval gears (1, 2). The means for detecting the rotating motion of the oval gears (1, 2) comprise a permanent magnet (8) arranged to one of the oval gears (1 or 2), centrically with the rotating shaft (7) thereof, and a sensor circuit (9) arranged on the outer surface of the housing (3) wall, at a location coinciding with that of the permanent magnet (8).

La présente invention porte sur un instrument de mesure à pignon ovale permettant de mesurer un écoulement et comprenant deux pignons de forme ovale (1, 2) disposés pour tourner de façon synchronisée dans la chambre d'un boîtier (3) à travers laquelle un milieu à mesurer est disposé pour s'écouler, le mouvement de rotation des pignons (1, 2) étant proportionnel au débit. L'instrument de mesure est équipé d'un moyen de détection du mouvement de rotation des pignons ovales (1, 2). Le moyen de détection du mouvement de rotation des pignons ovales (1, 2) comprend un aimant permanent (8) disposé sur l'un des pignons ovales (1 ou 2), de façon centrale par rapport à l'arbre de rotation (7) de celui-ci, et un circuit détecteur (9) disposé sur la surface externe de la paroi du boîtier (3), à un emplacement coïncidant avec celui de l'aimant permanent (8).

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