Centrifugal compressor for combustion engine, has projection portion provided along axial extension of recess portion, so that inner diameter reduction of wheel receiving space is realized based on inner diameter of receiving space

摘要

The centrifugal compressor (1) has an axial flow region (13) which extends axially at free end (13.1), and a recess portion (16.1) is provided in the outer edge (16) of rotor blade (12), so that outer diameter reduction of the compressor wheel (10) is realized in relation to the outer diameter (D1a) of compressor wheel. The compressor housing comprises a projection portion (20.1) along an axial extension (Lax-k) of the recess portion, so that inner diameter reduction of the wheel receiving space (21) is realized with respect to the inner diameter (D1G) of wheel receiving space.