US 12,454,951 B2
Wear resistant fluid ends
Mike Kelly, Anaheim, CA (US); and Joshua Singley, Latrobe, PA (US)
Assigned to KENNAMETAL INC., Latrobe, PA (US)
Filed by Kennametal Inc., Latrobe, PA (US)
Filed on Jul. 18, 2019, as Appl. No. 16/516,003.
Prior Publication US 2021/0017981 A1, Jan. 21, 2021
Int. Cl. F04B 53/10 (2006.01); F04B 53/16 (2006.01); F04B 53/22 (2006.01)
CPC F04B 53/10 (2013.01) [F04B 53/16 (2013.01); F04B 53/22 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A fluid end of a reciprocating pump comprising:
a body portion comprising a bore having an inner diameter surface;
a reciprocating plunger at least partially disposed in the bore; and
a sleeve positioned within the bore between the inner diameter surface and plunger, the sleeve engaging the inner diameter surface via an interference fit, and the sleeve comprising sintered cemented carbide, wherein the sintered cemented carbide exhibits a compressive stress gradient extending along a longitudinal axis of the sleeve, and wherein compressive stresses of the sintered cemented carbide are higher at ends of the sleeve relative to a midpoint of the sleeve; and
one or more seals between the sleeve and the reciprocating plunger, wherein a surface of the sleeve comprises one or more recesses for receiving the one or more seals.