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US 2021/0340978 A1Published application
Power end frame with residual compressive stress and methods
AssigneeCaterpillar Inc.
InventorsCurtis John Graham, Christopher Anthony Kinney
Life of this patent
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Abstract
A power end frame includes a housing and a face plate secured to the housing. During use, components of the power end frame, including the housing and the face plate, are subjected to large tensile stresses. This disclosure describes a method of imparting compressive stresses in the power end frame to resist these large tensile stresses.
Claims20
A method comprising:
- providing a power end frame for a pump, the power end frame comprising a face plate and a housing;
- forming a weld proximate a junction of the face plate and a portion of the housing;
- and
- laser shock peening at least one of the weld or a surface proximate the weld to form a treated surface at the at least one of the weld or the surface proximate the weld, the treated surface having a residual compressive stress resulting from the laser shock peening.
1 more element
A pump comprising:
- a fluid end;
- and
- a power end connected to the fluid end, the power end comprising:
- a face plate;
- a housing;
- a weld formed on at least one of the face plate or the housing;
- and
- a treated surface on at least one of the weld or a surface proximate the weld, the treated surface having a residual compressive stress formed by laser shock peening.
5 more elements
A method of repairing a damaged power end of a pump, the method comprising:
- providing the damaged power end;
- identifying a damaged portion of the damaged power end;
- removing material proximate the damaged portion to create one or more machined surfaces;
- forming a weld on the one or more machined surfaces;
- and
- laser shock peening at least one of the weld or a surface proximate the weld to form a treated surface at the at least one of the weld or the surface proximate the weld, the treated surface having a residual compressive stress resulting from the laser shock peening.
3 more elements
Dependencies are inferred from the claim text.