Integrated bearing systems for dynamically supporting shafts in pump systems

An integrated bearing system to dynamically support shafts in a pump system, the pump system to pressurize a fluid within a closed loop transport bus, the integrated bearing system comprising:

• an inner race;
• an outer race;
• a shaft connected to an impeller of the pump system;
• a first bearing to support the shaft at a first operational speed range, the first bearing coupled to the inner race;
• a second bearing to support the shaft at a second operational speed range, the shaft coupled to the outer race, wherein the second bearing is a foil bearing;
• and
• one or more sprag elements configured to:
• engage the inner race with the outer race at the first operational speed range;
• and
• disengage the inner race from the outer race at the second operational speed range.

A pump system to pressurize a fluid within a closed loop supercritical transport bus, the pump system comprising:

• means for increasing kinetic energy of the fluid flowing through the pump system;
• means for providing torque to a rotor shaft of the pump system;
• means for first supporting the rotor shaft at a first operational speed range;
• means for second supporting the rotor shaft at a second operational speed range;
• means for engaging an inner race with an outer race at the first operational speed range;
• and
• means for separating one or more liquids from the fluid, the one or more liquids including oil.