Screw compressors and gas compression equipment

Abstract

The screw compressor of the present invention comprises: a screw rotor; a radial sliding bearing, which includes a sleeve having a bearing surface on its inner periphery to rotatably support the screw rotor; an oil supply passage formed in the sleeve for supplying oil to the bearing surface; and a recess that is recessed from the bearing surface, and the oil supply passage is open; and the recess has two axially extending ends, namely a first end and a second end, and the first end is one of the two ends located upstream in a first direction in the axial direction from the suction port of the screw compressor toward the discharge port; the distance in the axial direction between the opening of the oil supply passage in the recess and the first end is shorter than the distance in the axial direction between the opening and the second end.

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