TURBINE SHROUD SUPPORT THERMAL SHIELD

摘要

A turbine shroud assembly (115) includes an annular thermal shield (280) around an annular shroud support (114). A honeycomb layer (284) is attached to the shroud support (114) along an inner side (288) of the honeycomb layer (284) and a heat shield (300) is attached to an outer side (304) of the honeycomb layer (284). The honeycomb layer (284) may be brazed to the shroud support (114) and the heat shield (300) may be brazed to the honeycomb layer (284). A lip (310) may depend inwardly from a forward end (314) of the heat shield (300) and an axial extension (330) may extend beyond an aft end (334) of the honeycomb layer (284). The thermal shield (280) may be segmented. The shroud assembly (115) may include axially spaced apart first and second stage thermal shields (280, 282) circumf erentially disposed around an annular shroud support (114) and may be incorporated in a high pressure turbine (16) including first and second stage shrouds (172, 272) coupled to shroud hangers (176, 276) that are inwardly supported by hooks (173, 175) of the shroud support (114).