Patent ID: 6547521
Filing Date: 2003-04-15
Classification: F01D,F05D

Abstract:
A flow duct guide apparatus for an axial flow turbine, comprising:an inner hub, said inner hub having a region of flexible contour; an annular outer guide vane carrier having a plurality of radial bearing holes; a row of adjustable guide vanes disposed in the flow duct, each guide vane having a tip profile and a root profile, the tip profiles of said guide vanes being rotatably received in said radial bearing holes, the tip profile of said guide vanes sealing against said guide vane carrier, the root profile of said guide vanes sealing against said hub region of flexible contour; and a spring flexibly supporting the tip profile of each of said guide vanes in a direction of the respective axes of said each of said guide vanes for facilitating closure of gaps created by thermal expansion between the root profile of said each of said guide vanes and said hub region of flexible contour.