System, method and apparatus for two-phase homogenizing...

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

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F04D 7/00 (2006.01) F04D 29/30 (2006.01) F04D 29/38 (2006.01)

Patent

CA 2708505

A two-phase, homogenizing or mixing stage for a centrifugal pump assembly homogenizes the fluids being circulated therethrough. The mixing stage produces high shut-in head pressure and a very high maximum flow rate. The mixing stage has a diffuser with fixed diffuser vanes that extend radially or tangentially at acute angles. The vanes may be curved in both the axial and radial directions to force fluids impinging thereon to have a radially inward component to create turbulence. The turbulence mixes and homogenizes the gas and liquid fluids to improve the overall performance of centrifugal pump assemblies that operate in two-phase fluids. The mixing stage also has an impeller adjacent the diffuser. The impeller vanes likewise extend radially and tangentially therefrom at acute angles and may be curved.

L'invention concerne un étage diphasique d'homogénéisation ou de mélange destiné à un ensemble pompe centrifuge et homogénéisant les fluides mis en circulation à travers celui-ci. L'étage de mélange produit une haute pression statique de fermeture et un très haut débit maximal. L'étage de mélange est doté d'un diffuseur muni d'aubes fixes de diffuseur qui s'étendent radialement ou tangentiellement en formant des angles aigus. Les aubes peuvent être incurvées à la fois dans les directions axiale et radiale afin d'imposer aux fluides qui les frappent une composante radiale centripète pour créer une turbulence. Cette turbulence mélange et homogénéise les fluides gazeux et liquides pour améliorer les performances globales des ensembles pompes centrifuges fonctionnant dans des fluides diphasiques. L'étage de mélange est également doté d'une roue à aubes adjacente au diffuseur. Les aubes de la roue s'étendent de même radialement et tangentiellement à partir de celle-ci en formant des angles aigus et peuvent être incurvées.

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