| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a turbo supercharger in which stress concentration produced at a joint part of a wheel and a shaft can be reduced further than the conventional one. <P>SOLUTION: The turbo supercharger 1A includes: a shaft 2 freely rotatable about a rotary axis line CL; and a turbine wheel 3 having a plurality of blades 4 and provided coaxially with the shaft 2. The turbo supercharger 1A is configured such that an insertion part 6 provided at the shaft 2 and arranged on the rotary axial line CL is fitted into a hole 5 provided in the turbine wheel and formed on the rotary axial line CL, and the turbine wheel 3 and the shaft 2 are integrated together by being welded at the outer periphery of an inlet of the hole 5. The turbo supercharger 1A is provided, at the center of an end of the insertion part 6, with a recess 11 recessed inwardly in the axial line direction CL. <P>COPYRIGHT: (C)2012,JPO&INPIT |
