Fluid-end of a high pressure pump

A pump comprising:

• a housing defining an inlet bore and a plunger bore;
• and
• a plunger is disposed within the plunger bore and reciprocal along a plunger axis;
• a first interior wall arranged to at least partially define the inlet bore, the first interior wall having a contour in a cross section taken normal to the plunger axis, the first interior wall at least partially defined by the revolution of the contour about a first inlet axis that is normal to and intersects the plunger axis, the contour including:
• a cylindrical portion arranged parallel to the inlet axis;
• a planar portion extending in a direction perpendicular to the inlet axis and spaced a first distance from the plunger axis;
• a convex bulge portion extending from the cylindrical portion and spaced a second distance from the plunger axis, the second distance being less than the first distance;
• and
• a V-shaped groove portion extending from the convex bulge portion.

A pump comprising:

• a housing;
• a cross-bore intersection formed in the housing;
• a plunger bore formed in the housing, the plunger bore has a plunger axis and is in communication with the cross-bore intersection via a plunger port;
• a plunger received within the plunger bore, the plunger reciprocates within the plunger bore along the plunger axis;
• a discharge bore formed in the housing, the discharge bore has a discharge axis and is in communication with the cross-bore intersection via a discharge port;
• a valve cover bore formed in the housing, the valve cover bore has a valve cover axis and is in communication with the cross-bore intersection via a valve cover port;
• an inlet bore formed in the housing, the inlet bore has an inlet axis and is in communication with the cross-bore intersection via an inlet port;
• a plunger bore transition area at the plunger port, the plunger bore transition area is adjacent the cross-bore intersection;
• a valve cover bore transition area at the valve cover port, the valve cover bore transition area is adjacent the cross-bore intersection;
• a V-shaped groove portion traversing a curvilinear path between the plunger bore transition area and the valve cover bore transition area, the V-shaped groove portion is adjacent the cross-bore intersection and extends about the inlet axis;
• and
• an interior wall defined by the inlet bore, the interior wall is adjacent the V-shaped groove portion,
• wherein the interior wall has a convex bulge portion that converges radially inward, relative to the inlet axis, gradually from the V-shaped groove portion, and
• wherein the interior wall has a concave portion that converges radially outward, relative to the inlet axis, gradually from the convex portion.