Patent ID: 6976828

Claim:
A centrifugal compressor wheel ( 1 ) including a metal hub ( 2 ) for connecting to a drive shaft ( 3 ), an inlet plate ( 4 ) and an outlet plate ( 5 ) fixed to the metal hub ( 2 ), and a plurality of blades ( 7 ), each blade having a beginning and a peripheral portion ( 7 B), fixed between the inner plate ( 4 ) and the outer plate ( 5 ), the wheel further comprising: an annular metal insert ( 8 ) integrated in the central portion of the wheel ( 1 ) at a periphery of the hub ( 2 ), the annular metal insert ( 8 ) having metal elements ( 7 A) forming the beginnings of the blades ( 7 ) of the wheel ( 1 ); wherein the inlet plate ( 4 ), the outlet plate ( 5 ), and the peripheral portions ( 7 B) of the blades ( 7 ) are made of a composite material, thereby constituting a composite portion of the wheel.