ROTOR SHAFT SUPPORT STRUCTURE AND SUPERCHARGER

摘要

PROBLEM TO BE SOLVED: To reduce mechanical loss of a rotor shaft support structure 33 while improving rotational stability of a rotor shaft 5.SOLUTION: A semi-floating bush 39 is configured so that an edge 39ai near an intermediate bush section 39c on an inner circumferential surface of a first bearing 39a is located close to a compressor impeller 7 (on a right side) with respect to an edge 39ao near the intermediate bush section 39c on an outer circumferential surface of the first bearing 39a, and so that an edge 39bi near the intermediate bush section 39c on an inner circumferential surface of a second bearing 39b is located close to a turbine impeller 9 (on a left side) with respect to an edge 39bo near the intermediate bush section 39c on an outer circumferential surface of the second bearing 39b.