| 摘要 |
The present invention provides a rotor shaft, comprising: a rod member ( 26 ); and a plurality of separately formed component parts (such as a compressor wheel 10 , a turbine wheel 11 and a rotor 14 of an electric generator) through which the rod member extends so that the plurality of component parts are joined together on an axis of the rod member, wherein mutually facing axial end surfaces of adjoining ones of the plurality of component parts are formed with annular projections ( 22, 23 ) having a substantially same radial dimension (or thickness) such that an outer circumferential surface of the annular projection of one component part can tightly contact an inner circumferential surface of the annular projection of an adjoining component part.
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