Importance

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Abstract

A heat shield of a gas turbine: a supporting structure (16), to which heat shield tiles are fastened releasably by tile holders (2, 2a, 2b); The heat shield permits cooling of the supporting structure. Each tile has a cold side facing the supporting structure (16) and an opposite hot side that can be acted upon with a hot medium; each tile holder (2, 2a, 2b) has a holding section (3) for fastening to a heat shield tile and a fastening section (4) for fastening to the supporting structure (16). The fastening section (4) is fastenable at a fastening groove (18) running in the supporting structure (16). At least one cooling air duct (9) protects against hot gases. For the cooling purpose, in addition to the fastening grooves (18) at least one cooling air groove (1, 22) arranged in the supporting structure (16). The cooling air groove (1, 22) is partially covered in the longitudinal direction (7) of the cooling air groove (1, 22), at least when heat shield tiles are fastened to the supporting structure (16), thus forming a channel-shaped groove section (8) into which at least one cooling air duct (9) opens. Cooling air flowing out of the cooling air duct (9) is substantially deflectable in the longitudinal direction (7) of the cooling air duct (1,22).

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First Claim