Screw compressor for internal combustion engines

A screw compressor comprising:

• an extruded housing including a barrel section (2) and two end sections (3, 4) at opposite end portions of said barrel section (2);
• said housing enclosing a working space, said working space including two intersecting bores (5, 6);
• said barrel section (2) having an opening at each opposite end portion thereof;
• a pair of intermeshing rotors (7, 8) mounted in said housing, each rotor being mounted in a respective one of said bores, and each rotor having intermeshing helical lands and intervening grooves;
• inlet and outlet ports (18, 19) formed in said housing and in communication with respective bores of said working space;
• each of said end sections (3, 4) having a projection (29) shaped correspondingly to a respective opening of a transverse section of the opposite end portions of said barrel section (2), and said projections being dimensioned so as to be inserted into respective openings of said barrel section (2) by forced fit between outer surfaces (30) of the projections (29) and inner surfaces (31) of said end portions of said barrel section (2) to improve rigidity of said housing;
• wherein at least one of said outer surfaces (30) of said projections (29) and said inner surfaces (31) of said end portions of said barrel section, which are pressed together, is a straight tapered surface;
• and
• at least one screw joint (20-22;
• 25) at each of said end sections (3, 4) for securing said respective end sections (3, 4) to said barrel section (2).