Low-pressure turbine shroud

Details Low-pressure turbine shroud Low-pressure turbine shroud

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 9/00 (2006.01) F01D 11/00 (2006.01) F01D 25/24 (2006.01)

Patent

CA 2080152

GEAE 13DV-10831 Abstract LOW-PRESSURE TURBINE SHROUD A turbine shroud is formed by a ring of butted shroud segments. Each turbine shroud segment has a radially inwardly projecting annular flange which is seated on a radially outwardly facing surface of an annular tip of the outer shroud of the downstream nozzle stage. This flange is free to slide axially relative to the annular tip during thermal expansion of the nozzle outer shroud in the axial direction. Each turbine shroud segment has a spring seated thereon which urges the radially inwardly projecting flange toward the annular tip of the nozzle outer shroud. Honeycomb material attached to the turbine shroud segment discourages the flow of hot gases through the gap between the flange and annular tip of the outer shroud of the downstream nozzle stage attributable to seam chording, thereby reducing the leakage of hot gas into the spaces between the shrouds and the outer casing.

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