| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump unit capable of suppressing galling due to a rotor.SOLUTION: A drive shaft is formed in the axial direction thereof so that the flexural rigidity of the drive shaft in a second region is lower than the flexural rigidity of the drive shaft in a first region when the first region is a predetermined range in the axial direction including a midpoint of a rotor, and the second region is a predetermined range in the axial direction which is adjacent to another side in the axial direction of the first region and includes an end portion of a second bearing close to the rotor. |
