| 摘要 |
PURPOSE:To enable to respond to any designated equivalent length and expand the 5 scope of interchangeability of a shaft material by a mechanism wherein a dummy portion is formed at one portion of a shaft. CONSTITUTION:A dummy portion 5 is formed between a protion up to the center B of a rotor from the surface A of a direct-coupled flange, the axial diameters phi1, phi2 of the dummy portion 5 and the thickness W of a boss portion of a fan are worked, and a shaft is conformed to designated equivalent length. Thus, the shaft can rapidly respond to the large change of the designated equivalent length naturally, and the scope of interchangeability of a shaft material can be expanded. |
