Twin-cylinder impeller pump

F - Mech Eng,Light,Heat,Weapons – 04 – C

Patent

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Details

F04C 2/06 (2006.01) F04C 11/00 (2006.01)

Patent

CA 2242395

A twin-cylinder impeller pump is disclosed. In the above pump, the twin- cylinder runner (3, 4) is provided with an elastic sealing means for removing any gap from the junction between the runner and the throat of a pump casing (10) with the runner being positioned at its upper or lower dead point. In a transmission gear mechanism of the above pump, the drive shaft does not directly engage with the driven shaft, but indirectly engages with the driven shaft through two idle gears (14, 17). In each of the idle gears (14, 17), both a circular concentric gear (14, 17) and an elliptical eccentric gear (15, 18) are commonly mounted to a shaft, thus forming a twin gear. The two elliptical eccentric gears (15, 18) engage with each other, while the two circular concentric gears (14, 17) engage with the drive and driven gears (13, 16) respectively, thus effectively reducing operational noises and vibrations during a pumping operation.

L'invention concerne une pompe à roue comportant deux cylindres. Dans cette pompe, le rotor (3, 4) à deux cylindres est pourvu de moyens d'étanchéité élastiques servant à supprimer tout espace depuis la jonction entre le rotor et la gorge du carter de pompe (10), le rotor étant positionné à son point mort supérieur ou inférieur. Dans le mécanisme d'engrenage de transmission de cette pompe, l'arbre moteur ne vient pas en prise directe avec l'arbre mené, mais en prise indirecte par l'intermédiaire de deux engrenages intermédiaires (14, 17). Dans chacun de ces engrenages intermédiaires (14, 17), à la fois un engrenage concentrique circulaire (14, 17) et un engrenage excentrique ellipsoïdal (15, 18) sont montés à un arbre, de façon habituelle, ce qui crée un double engrenage. Les deux engrenages excentrique ellipsoïdaux (15, 18) viennent en prise réciproque, tandis que les deux engrenages concentriques circulaires (14, 17) viennent en prise avec les engrenages menant et menés respectifs (13, 16), ce qui permet de limiter efficacement les bruits et les vibrations pendant la mise en service de la pompe.

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