F - Mech Eng,Light,Heat,Weapons – 02 – C
Patent
F - Mech Eng,Light,Heat,Weapons
02
C
F02C 7/28 (2006.01) F01D 11/00 (2006.01) F16F 1/18 (2006.01) F16J 15/08 (2006.01)
Patent
CA 2619081
Provided is a seal structure, according to the present invention, for sealing opposite surfaces of flanges between adjacent tail ducts, which can be prevented from being worn or aged deteriorated due to a thermal deformation in a high temperature atmosphere or vibration of a gas turbine combustor, and which can maintain a satisfactory sealing function for a long time. The seal structure is characterized in that recess grooves 24, 25 are formed in opposed surfaces t1, t2 of adjacent flanges 21, 22 at the outlet end of tail ducts, striding between the opposed surfaces, a seal assembly 30 composed of a seal member 31 and a leaf spring 32 is inserted in the recess grooves, the seal member has a pair of continuous beads 31a, 31b which are arranged facing the inner surfaces 24a, 25a, on the combustion gas passage side, of the recess grooves, striding between the opposed surfaces of the flanges within the recess grooves, the leaf spring 32 is arranged so as to be made into contact with the seal member 31 within the recess grooves so that the beads are pressed against the surfaces on the combustion gas passage side by the resilient force of the leaf spring so as to create seal surfaces.
Structure d'étanchéité d~un système de combustion à turbine à gaz permettant de sceller les faces opposées de flasques entre des tubes de queue adjacents, caractérisée en ce que d~excellentes performances d~étanchéité sont conservées sur une longue période sans produire d~usure ni de détérioration de vieillissement par déformation thermique et vibrations à hautes températures du système de combustion à turbine à gaz. Des rainures rétreintes (24, 25) de part et d'autre des faces opposées des flasques sont constituées le long des faces opposées (t1, t2) des flasques adjacents (21, 22) aux extrémités de sortie des tubes de queue. Un joint équipé (30) constitué d~un élément d'étanchéité (31) et d~un ressort à lames (32) est installé dans les rainures rétreintes. L'élément d'étanchéité (31) comprend une paire de parties saillantes continues (31a, 31b). Les parties saillantes sont disposées dans les rainures rétreintes pour s~opposer aux faces latérales de passage de gaz de combustion (24a, 25a) des rainures rétreintes de part et d'autre des faces opposées des flasques. Le ressort à lames (32) se trouve dans les rainures rétreintes pour venir au contact de l'élément d'étanchéité (31). La structure d'étanchéité est caractérisée en ce qu~une face d~étanchéité est formée par pression des parties saillantes contre les faces latérales de passage de gaz de combustion par la force élastique du ressort à lames (32).
Aoyama Kuniaki
Fujimoto Kiyoshi
Kunitake Nobuhiro
Minami Masaharu
Gowling Lafleur Henderson Llp
Mitsubishi Heavy Industries Ltd.
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