SINGLE SCREW COMPRESSOR

摘要

To provide a single screw compressor that is capable of decreasing an axial direction load acting on a screw rotor. A single screw compressor (1) is equipped with a screw rotor (2) and a casing (3). The screw rotor (2) has plural helical grooves (6) in its outer peripheral surface and has a tapered shape where its outer diameter becomes larger from an intake side toward a discharge side. The casing (3) houses the screw rotor (2). The screw rotor (2) has a reversely tapered portion (8). The reversely tapered portion (8) is located on a downstream side of a maximum outer diameter portion (B) on the discharge side in the outer peripheral surface having the helical grooves (6) and has a reversely tapered shape where its outer diameter becomes smaller from the maximum outer diameter portion (B).