嵌合構造および圧縮機用スクリュロータ

摘要

PROBLEM TO BE SOLVED: To restrict fretting fatigue crack in a screw rotor for compressor.;SOLUTION: A screw rotor for compressor 40 has a mating structure in which an outer peripheral member 42 having an insertion hole 42a and a shaft member 41 inserted into the insertion hole 42a and mated to an outer peripheral member 42 are mated. At an end part of the outer peripheral member 42 in the axial direction of the shaft member 41, a non-thick part 42d which is a region having a thickness in the radial direction being a first thickness and extends in the circumferential direction, and a thick part 42c which is a region having a thickness in the radial direction being a second thickness larger than the first thickness and extends in the circumferential direction, are provided. Also, a recessed part 42b dented in the axial direction is formed only in the thick part 42c.;SELECTED DRAWING: Figure 4;COPYRIGHT: (C)2019,JPO&INPIT