US 12,006,949 B2
Multiphase pump
Matthew Bourne, Katy, TX (US); and Nicholas Czemerys, Leeds (GB)
Assigned to SULZER MANAGEMENT AG, Winterthur (CH)
Filed by Sulzer Management AG, Winterthur (CH)
Filed on Nov. 19, 2019, as Appl. No. 16/688,404.
Claims priority of application No. 18207457 (EP), filed on Nov. 21, 2018.
Prior Publication US 2020/0158135 A1, May 21, 2020
Int. Cl. F04D 29/54 (2006.01); F04D 19/02 (2006.01); F04D 29/18 (2006.01); F04D 29/52 (2006.01)
CPC F04D 29/54 (2013.01) [F04D 19/02 (2013.01); F04D 29/181 (2013.01); F04D 29/52 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multiphase pump for conveying a multiphase process fluid from a low pressure side to a high pressure side, comprising:
an outer housing;
a casing, the casing having a pump inlet and a pump outlet for the process fluid;
a pump rotor including an impeller, and capable of rotating about an axial direction arranged within the casing, and configured to convey the process fluid from the pump inlet to the pump outlet; and
a diffuser including a wear ring,
the casing comprising a plurality of stage segments, and the plurality of stage segments comprising an individual stage-segment, a low pressure segment arranged at the pump inlet and a high pressure segment arranged at the pump outlet, the low pressure segment radially adjacent to at least one of the impeller or the wear ring, the individual stage-segment arranged between the high pressure segment and the low pressure segment, and the plurality of stage segments being held together by a sealing support disposed inside the outer housing, the casing being arranged within the outer housing, the low pressure segment including a flange to receive the sealing support, the flange having a first end disposed at a first radial plane and a second end disposed at a second radial plane, both the first and second ends being radially adjacent to at least one of the impeller or the wear ring along the first and second radial planes, respectively.