Microscopic surface texturing for shouldered shaft and bearing pads

A support assembly for a shouldered shaft of a variable displacement, bent axis piston pump, the support assembly comprising:

• a bearing retainer housing comprising radially inwardly facing tilt pad bearings and axially facing tilt pad thrust bearings;
• and
• a shouldered shaft disposed in the bearing retainer housing and comprising:
• a first shaft section;
• a second shaft section having a larger diameter than the first shaft section and comprising an outer diameter (OD) surface, which faces and fluid-dynamically interacts with the radially inwardly facing tilt pad bearings;
• and
• an axial surface, which extends between the first shaft section and the second shaft section, and which faces and fluid-dynamically interacts with the axially facing tilt pad thrust bearings,
• the radially inwardly facing tilt pad bearings being formed to define microscopic surface texturing for increased fluid-dynamic interaction.

A support assembly for a shaft of a variable displacement, bent axis piston pump, the shaft assembly comprising:

• a bearing retainer housing comprising radially inwardly facing tilt pad bearings and axially facing tilt pad thrust bearings;
• and
• a shaft disposed in the bearing retainer housing and comprising:
• a first shaft section;
• a second shaft section having a larger diameter than the first shaft section and comprising an outer diameter (OD) surface, which faces and fluid-dynamically interacts with the radially inwardly facing tilt pad bearings;
• and
• an axial surface, which extends between the first shaft section and the second shaft section, and which faces and fluid-dynamically interacts with the axially facing tilt pad thrust bearings,
• the axially facing tilt pad thrust bearings being formed to define microscopic surface texturing for increased fluid-dynamic interaction.