| 摘要 |
PURPOSE:To prevent resonance from occurring so simply and inexpensively, by forming an embedded part, consisting of the same ceramics as the other side member, in one side of members at a contact part between a rotary shaft and a rotor consisting of caramics each different in type, while welding them in this embedded part. CONSTITUTION:A turbine rotor is constituted of a rotary shaft 10 consisting of ceramics and a turbine rotor 12 consisting of ceramics different in type with that of the former. And, a projection 16 is installed in this rotor 12, while a concabe part 18 to be fitted in this projection 16 is installed in a tubular expanding part 17 of the rotary shaft, and both 12 and 10 fitted in with each other. At this time, an embedded part 20, consisting of ceramics being of the same system of the ceramics forming the rotary shaft 10 and weldable, is formed on a surface of the rotor 12 coming into contact with an end face of the tubular part 17. Then, an interval between the end face of the rotary shaft 10 and the embedded part 20 of the rotor 12 is welded with a welded part P, for example, laser beam welding L and L'. |
