Combined power system

A combined power system that includes a rotary electric machine system and an internal combustion engine, the rotary electric machine system including a rotary electric machine and a rotary electric machine housing configured to rotatably support a rotating shaft of the rotary electric machine, the internal combustion engine including an output shaft configured to rotate integrally with the rotating shaft, the combined power system comprising:

• a first bearing and a second bearing that are interposed between the rotary electric machine housing and the rotating shaft;
• an oil supply device configured to supply a lubricating oil to the first bearing and the second bearing;
• a gas supply device configured to supply a gas to the first bearing and the second bearing;
• and
• a recovery device configured to recover the lubricating oil and the gas supplied to the first bearing and the second bearing,
• wherein in the rotary electric machine housing, a first supply passage through which the gas supplied from the gas supply device is supplied to the first bearing and the second bearing, a first discharge passage through which the gas is discharged from the first bearing and the second bearing to the recovery device, a second supply passage through which the lubricating oil supplied from the oil supply device is supplied to the first bearing and the second bearing, and a second discharge passage through which the lubricating oil is discharged from the first bearing and the second bearing to the recovery device, are formed, and
• wherein the recovery device is configured to recover the gas that has flowed through the first discharge passage and the lubricating oil that has flowed through the second discharge passage.