| 摘要 |
PURPOSE:To eliminate irregular contact of the hook parts with each other and also concentration of the stress by selecting the thickness of hook parts of a turbine vane and an impeller so that the thickness is in reverse proportion to the modulus of longitudinal elasticity of their materials. CONSTITUTION:Each turbine vane 402 having a planted part 401 in the form of a Christmas tree and a turbine impeller 403 are made of materials with different moduli of longitudinal elasticity. Here the thickness hB, hW of hook parts shall be in reverse proportion to their moduli of longitudinal elasticity. Thus irregular contact of the hook parts with each other as well as concentration of the stress can be prevented. |
