| 摘要 |
<p>PURPOSE:To absorb thermal elongation difference between a top cover and a housing in a turbine rotor blade where the top cover is jointed integratedly at the end of the housing fitted on a blade shaft by jointing an elastically deformed sheet-shaped protrusion at a position opposing to the top end of the top cover housing. CONSTITUTION:A turbine rotor blade used for gas turbine and so forth is composed of a blade shaft 21 consisting of an embedding portion 21a embedded in a turbine shaft, a core portion 21b protruding from the turbine shaft and a flange portion 21c provided at the root of the core portion 21b, and a housing 23 fitted on the periphery of the core portion 21b. In the blade shaft 21, plural cooling air flow passages 22a which pass through the embedding portion 21a and the core portion 21b are provided, and after fitting the housing 23, a top cover 24 is jointed integrally at the top end of the core portion 21b, whereas an elastically deformed sheet-shaped protrusion 25 is jointed at a position opposing to the top end of the housing 23 of the top cover 24 to hold the end of the housing 23 through the protrusion 25 and to dispose a seal plate 26 between the protrusions of two rows.</p> |
