Compressor housing for supercharger

A compressor housing for a supercharger comprising:

• an intake port housing an impeller, the intake port being configured to take in air toward the impeller;
• a scroll having a scroll chamber, the scroll chamber being configured to introduce the air discharged from the impeller;
• a shroud including a shroud surface, the shroud surface facing the impeller, the shroud including a sliding member in an annular shape and a sliding-member fixing portion in an annular shape;
• and
• an inner circumferential surface of the sliding member being the shroud surface,
• the sliding-member fixing portion including contact portions,
• the contact portions being located on an inner circumferential surface of the sliding- member fixing portion,
• the contact portions being configured to contact with at least part of an outer circumferential surface of the sliding member,
• the sliding member being fastened to the sliding-member fixing portion at the contact portions by fastening members,
• the fastening members extending through the sliding-member fixing portion, and the fastening members being fastened from an outer circumferential surface of the sliding-member fixing portion to the sliding member, and
• wherein linear projections are disposed to the outer circumferential surface of the sliding member, and the linear projections are configured to contact with the contact portions, and the linear projections extend in an axial direction of the impeller.