Shroud for a gas turbine

Details Shroud for a gas turbine Shroud for a gas turbine

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 11/24 (2006.01) F01D 11/08 (2006.01) F01D 11/14 (2006.01) F01D 25/12 (2006.01)

Patent

CA 2580466

Protection device (10) for a stator of a gas turbine of the type comprising a series of sectors (12) constrained to each other by connection means, each sector (12) has at least one cavity (14) having a bottom (15), in correspondence with at least one cavity (14), a corresponding sheet (20) equipped with a series of pass-through holes (21) and suitable for covering at least one cavity (14) is fixed on an outer surface of the relative sector (12), each sector (12) is cooled by means of a stream of air coming from the pass-through holes (21) of the corresponding sheet (20) which is passed on the bottom (15) and discharged from at least one outlet hole, the bottom (15) of each sector (12) comprises a series of protuberances (30) to increase the thermal exchange surface and increase the cooling efficiency of the protection device (10).

L'invention concerne un dispositif de protection (10) pour stator de turbine à gaz du type comprenant une série de segments (12) serrés entre eux par des moyens de connexion, chaque segment (12) comportant au moins une cavité (14) qui présente un fond (15). En relation avec au moins une cavité (14), une feuille (20) correspondante, pourvue d'une série de trous (21) traversants et qui permet de couvrir au moins une cavité (14), est fixée sur une surface extérieure du segment (12) correspondant. Chaque segment (12) est refroidi par un écoulement d'air provenant des trous (21) de la feuille correspondante (20), qui passe sur le fond (15) et est déchargé par au moins un orifice de sortie. Le fond (15) de chaque segment (12) comprend une série de protubérances (30) destinées à accroître la surface d'échange thermique ainsi que l'efficacité de refroidissement du dispositif de protection (10).

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