CENTRIFUGAL FLUID MACHINE, CENTRIFUGAL BLOWER, AND CENTRIFUGAL COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a centrifugal fluid machine, a centrifugal blower, and a centrifugal compressor equipped with a structure sucking outside air as cooling air separately from a main flow.;SOLUTION: A centrifugal fluid machine is equipped with: an impeller 2 journaled to a rotary shaft 8; a cooling fan 34 journaled to the rotary shaft, and provided on a back surface side of the impeller; a rotation drive portion 4 which integrally rotates the impeller and the cooling fan through the rotary shaft; an impeller housing 3 which stores the impeller; and a motor housing 5 which is coupled to the impeller housing, and stores the rotation drive portion. A suction port 14 and an exhaust port 25 are formed in a motor housing. A cooling flow path is formed so as to suck outside air from the suction port by the cooling fan, circulate the outside air in the motor housing, and exhaust the outside air from the exhaust port.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT