Power end for hydraulic fracturing pump

A hydraulic fracturing pump, the hydraulic fracturing pump comprising:

• a crankcase housing forming an enclosure for receiving oil, the crankcase housing having a first enclosing side at a first end of the crankcase housing and a second enclosing side at a second end of the crankcase housing, an upper surface extending between the first and second sides and a base thereby defining a crankcase interior, the crankcase housing formed along a crankcase axis extending between the two ends, the crankcase housing further having a plurality of crosshead apertures formed in the crankcase housing, each crosshead aperture formed about a crosshead axis that is generally perpendicular to the crankcase axis;
• a gearbox assembly mounted directly on at least one of the first enclosing side and the second enclosing side;
• a plurality of ribs enclosed within the crankcase housing between the two ends and spaced apart from the first enclosing side and the second enclosing side of the crankcase housing, each rib generally perpendicular to the crankcase axis and parallel with the crosshead axis, each rib having at least a first torsion tube aperture formed therein and each rib further having a crankshaft aperture formed therein, each crankshaft aperture generally coaxially with the crankcase axis;
• one or more hollow torsion tubes, each hollow torsion tube having a first end and a second end with the first end of each hollow torsion tube affixed to the crankcase housing first enclosing side and the second end of each hollow torsion tube affixed to the crankcase housing second enclosing side, the hollow torsion tubes positioned within the crankcase interior and between the two ends of the crankcase housing and between the crankcase axis and the upper surface of the crankcase housing, each hollow torsion tube intersecting a plurality of ribs, passing through a torsion tube aperture of each rib, wherein each hollow torsion tube is affixed to each of the plurality of ribs;
• and
• an additional torsion tube having a first end and a second end with the first end of the additional torsion tube affixed to the first enclosing side of the crankcase housing and the second end of the additional torsion tube affixed to the second enclosing side of the crankcase housing, the additional torsion tube positioned within the crankcase interior defined between the two ends of the crankcase housing, wherein the additional torsion tube is an oil distribution tube having a plurality of apertures formed therein along at least a portion of the length of the additional torsion tube and in fluid communication with an oil source.

A hydraulic fracturing pump comprising:

• a crankcase housing forming an enclosure for receiving oil, the crankcase housing having a first enclosing side at a first end of the crankcase housing and a second enclosing side at a second end of the crankcase housing, an upper surface extending between the first and second enclosing sides and a base, wherein the first enclosing side and the second enclosing side are each generally perpendicular to the crankcase axis and each enclosing side has at least a first torsion tube aperture and a second torsion tube aperture formed therein, the crankcase housing formed along a crankcase axis extending between the two ends, the crankcase housing further having a crosshead aperture formed in the crankcase housing, the crosshead aperture formed about a crosshead axis that is generally perpendicular to the crankcase axis;
• a gearbox assembly mounted directly on at least one of the first enclosing side and the second enclosing side;
• a plurality of ribs enclosed within the crankcase housing between the two ends, each rib generally perpendicular to the crankcase axis and each rib having at least a first torsion tube aperture and a second torsion tube aperture formed therein and further having a crankshaft aperture formed therein, each crankshaft aperture generally coaxially with the crankcase axis;
• a crankshaft extending along the crankcase axis;
• a piston arm pivotally coupled to the crankshaft at a first end of piston arm, the piston arm pivotally coupled to a crosshead at a second end of the piston arm, the crosshead reciprocal along the crosshead axis;
• at least two hollow torsion tubes, each torsion tube having a first end and a second end with the first end affixed to and extending from an aperture in the crankcase housing first enclosing side and the second end affixed to and extending from an aperture in the crankcase housing second enclosing side, the hollow torsion tubes positioned between the two ends of the crankcase housing and between the crankcase axis and the upper surface, each torsion tube intersecting a plurality of ribs, passing through a torsion tube aperture of each rib, wherein each torsion tube is attached to each of the plurality of ribs;
• and
• an additional hollow torsion tube having a first end and a second end with the first end affixed to and extending from an aperture in the first enclosing side and second end affixed to and extending from an aperture in the second enclosing side, the additional torsion tube positioned within the crankcase interior between the first enclosing side and the second enclosing side of the crankcase housing and substantially parallel with the crankcase axis, wherein the additional torsion tube is an oil distribution tube having a plurality of apertures formed therein along at least a portion of the length of the additional torsion tube and in fluid communication with an oil source.