Progressing cavity pumps with split extension tubes

Details Progressing cavity pumps with split extension tubes Progressing cavity pumps with split extension tubes

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 3/00 (2006.01) F04C 2/107 (2006.01) F04C 13/00 (2006.01)

Patent

CA 2196250

A progressing cavity pump comprises an inlet housing defining a chamber, an extension tube defining a tube interior communicating with the chamber, a stator defining an internal passageway communicating with the tube interior, a rotor positioned in the internal passageway in abutment againstan inner surface of the internal passageway and a coupling at least partially enclosed by the extension tube. The coupling is connected to the rotor for actuating the rotor for rolling movement along the inner surface of the internalpassageway of the stator. In an especially preferred form, the extension tube is in the form of a surface of revolution and is separable into first and second sections along a dividing plane which passes through the center of the tube. Fasteners are used to removably fasten the first and second sections to each other, the housing and the stator casing to provide access for inspection of thecoupling, the rotor and the stator.

Cette invention concerne une pompe à rotor hélicoïdal excentré qui comporte une corps d'admission définissant une enceinte, un tube raccordé au corps d'admission, un stator définissant une voie d'écoulement à l'intérieur du tube, un rotor disposé à l'intérieur du stator et s'appuyant de place en place à la paroi intérieure de celui-ci, et un accouplement dont au moins une partie se trouve à l'intérieur du tube. L'accouplement sert à entraîner le rotor dans un mouvement tournant qui crée des alvéoles qui progressent le long de l'axe du stator. Dans une variante particulièrement privilégiée, le tube prend la forme d'une surface de révolution formée de deux demi-coquilles séparables maintenues ensemble et fixées au corps d'admission au moyen de fixation amovibles. Cette disposition constructive facilité l'inspection de l'accouplement, du rotor et du stator.

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