| 摘要 |
PURPOSE:To make manufacture easy as well as to simplify replacement at the time of breakage, by having a turbine disc made of a metal and a moving blade part to be situated on the outer circumference of a ceramic, respectively, and joining both together free of detachment with fitting of irregular parts and insertion of fixtures. CONSTITUTION:A turbine disc 1 is made of a metal, while a moving blade part 6 installing a log of blades 8 as one body on the circumference of a ring rim 7 is made of a ceramic. And, plural recess parts 3 are formed on the circumference of the turbine disc 1 at regular intervals and simultaneously plural projection parts 9 corresponding to these recess parts are formed in an inner circumference of the rim 7, and a whirl-stop at the time of assembling of the disc 1 and the moving part 6 is promoted by fitting of these recess and projection parts 3 and 9. A projection 2, whose outer diameter is made somewhat larger than an inner diameter of the rim 7, is formed in an axial one side of disc 1, while a fixture 4 being detachably attached tight to the disc 7 is installed in the other side, and the disc 1 and the rim 7 are held in between by the projection 2 and the fixture 4 in the axial direction, thereby constituting a turbine rotor.
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