US Patent 10158274 Rotary machine

A rotary machine including a rotary shaft rotatably disposed in a casing is provided. The rotary machine includes an end plate disposed at one end side of the casing in the axial direction. The rotary machine includes a recess section formed in the end plate and recessed toward the inside of the casing. The rotary machine includes a through hole formed in the recess section and through which one end section of the rotary shaft is inserted. The rotary machine includes a shaft grounding device which is provided in the recess section. The shaft grounding device is brought into contact with the one end section of the rotary shaft which is inserted through the through hole, and eliminates a shaft voltage generated in the rotary shaft.