Multistage disc pump for multiphase fluids

A pump for use in a multistage disc pump for multiphase fluids, the pump comprising:

• a bowl having an interior volume, said bowl having an inlet and an outlet, the outlet being longitudinally aligned with the inlet at an opposite end of said bowl from said inlet, the inlet adapted to receive the multiphase fluid therein, the outlet adapted to pass a pumped multiphase fluid outwardly of said bowl;
• a disc set rotatably mounted in the interior volume of said bowl, said disc set having a drive disc and a driven disc, at least one of the drive disc and the driven disc having a plurality of vanes formed thereon or affixed thereto, the plurality of vanes extending toward another of the drive disc and the driven disc, the plurality of vanes being adapted to interact with the multiphase fluid passing through said bowl, wherein the plurality of vanes of said drive disc extend for no more than a distance between said drive disc and said driven disc, the plurality of vanes of said driven disc extending for no more than the distance between said drive disc and said driven disc;
• a lodging positioned in the interior volume of said bowl, the lodging being positioned in spaced relation to an inner wall of said bowl, said lodging supporting said disc set in the interior volume of said bowl;
• and
• a plurality of fixed vanes affixed to said lodging and the inner wall of said bowl, said plurality of fixed vanes adapted to interact with the multiphase fluid flowing from the inlet to the outlet of said bowl, wherein said lodging defines a curved passageway between an exterior of said lodging and the inner wall of said bowl, wherein the curved passageway extends from said disc set toward the outlet of said bowl, the curved passageway adapted to allow the multiphase fluid to flow around the outer diameter of said lodging.