Rotary machine having an impeller with a sleeve fixedly mounted to a shaft

摘要: An improved rotary machine such as centrifugal type compressor adapted to rotate under high load of the including a plurality impellers fixedly mounted (shrinkage-fit) on main shaft. To effectively inhibit rotor from vibrating due loosened fitting onto shaft improvement consists each being provided with sleeve portion which is made integral impeller. The located at position removed part impeller along axial direction determined in accordance theory strength materials manner that displacement radial force resulting rotation has no effect determination portion, wherein shrink fit impellers.