| 摘要 |
PURPOSE:To improve productivity and reliability by providing each flat surface including front and rear surfaces of upper and lower segments comprising a ceramic stationary blade in the direction perpendicular to a turbine shaft core, and providing each flat surface including light and left side surfaces of respective segments in the direction crossing with an angle equal with the pitch angle of the stationary blade. CONSTITUTION:A ceramic stationary blade has an airfoil-shaped shell 1 and upper and lower side walls 2, 3 provided on a retainer ring and support ring sides between the opposed ends of the shell 1. Each of side walls 2, 3 are retained to upper and lower metal shrouds 4, 5 through insulating plates 6, 7, while comprising as upper and lower segments. In this state, the front surface A and rear surface B of respective segments are provided in flat surfaces in parallel to each other, and light and left side surfaces C, D are provided in flat surfaces, a space between which becomes narrower in compliance with following from the upper part to the lower part. An inner angle formed by that respective side surfaces C, D are crossed in the plane perpendicular to a turbine shaft core, is set equal with a pitch angle alpha of the stationary blade.
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