Progressing cavity pump or motor

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

Patent

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Details

F04C 2/107 (2006.01) F04C 5/00 (2006.01) F04C 15/00 (2006.01)

Patent

CA 2507291

A progressing cavity pump or a motor includes, in one embodiment, an outer tube (12), an inner tube (14), and a plurality of apertures (16). A pair of annular seal glands (18) seal the stator material to the outer tube. The stator material is injection molded into the inner tube and passes through the plurality of apertures and into an annular gap between the inner tube and the outer tube. In other embodiments, the outer housing for a progressing cavity pump or motor is provided with one or more grooves, with each groove having an outer surface radius less than the outer housing surface radius. A plurality of apertures are provided in fluid communication with the grooves. According to the method of the invention, the stator material is injected into the apertures and fills a space radially outward of the apertures to bond the stator material to the outer housing.

Une pompe ou un moteur à rotor hélicoïdal excentré comporte, sous l'une de ses formes, un tube externe (12), un tube interne (14) et de multiples orifices (16). Une paire de dispositifs d'étanchéité toriques assure l'étanchéité du stator par rapport au tube extérieur. La matière du stator est injectée dans le tube intérieur, traverse les orifices et pénètre dans une cavité annulaire séparant les tubes intérieur et extérieur. Dans d'autres formes, le corps extérieur d'une pompe ou d'un moteur à rotor hélicoïdal excentré comporte une ou plusieurs rainures. Le rayon de la surface de chaque rainure est inférieur au rayon de la surface du corps extérieur du dispositif. De multiples orifices constituent une voie de circulation des fluides vers les rainures. Conformément à la méthode associée à cette invention, la matière du stator est injectée dans les orifices et remplit un espace annulaire situé à l'extérieur des ouvertures afin de lier le stator au corps extérieur.

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