High speed centrifugal pump lined seal housing

A seal housing for a centrifugal fluid pump comprising:

• an annular opening operable to receive a shaft therein and to allow the seal housing to fit along the shaft and proximate an impeller;
• a seal chamber comprising a space between an inner surface of the annular opening and the shaft, wherein the seal chamber is configured to receive pumped fluid;
• a lining sleeve lining the inner surface of the annular opening facing the shaft in the seal chamber, wherein the lining sleeve comprises a hard polymer and is operable to prevent the pumped fluid from sticking to the inner surface of the annular opening;
• and
• a cover operable to fit around the shaft and recessed into the seal housing, wherein the lining sleeve covers a portion of the seal housing facing the cover, the cover disposed between the lining sleeve and impeller, wherein the impeller is able to spin relative to the cover, and wherein the cover has a cover diameter less than a diameter of the impeller.

A method of constructing a centrifugal pump comprising:

• providing an impeller operable, when spun rotationally, to cause a pressure differential and pull fluid from an inlet and toward an outlet;
• providing a shaft operable to move the impeller rotationally;
• providing a seal housing operable to fit around the shaft;
• providing a cover operable to fit around the shaft and on a side of the seal housing proximate the impeller, wherein the cover has a cover diameter less than a diameter of the impeller;
• providing a seal operable to fit around the shaft and on a side of the seal casing housing distal the impeller;
• and
• lining an inner surface of the seal housing with a lining sleeve between the cover and the seal that faces the shaft, wherein the lining sleeve comprises a hard polymer, wherein the cover is between the lining sleeve and the impeller.