Seal plate for a gas turbine moving blade

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 5/30 (2006.01) F01D 5/18 (2006.01) F01D 11/00 (2006.01)

Patent

CA 2231753

The present invention relates to a seal plate at the platform portion of a gas turbine moving blade. The seal plate is inserted in a gap between the adjacent platforms at each end portion of a seal pin to prevent air from leaking to the outside. A groove is provided at each of four corners of the end portion of platform of the moving blade, and the seal plate is inserted to cover the gap so as to extend the end portions of the adjacent platforms, by which the gap between the platforms is blocked. A seal pin and end seal pins are inserted between the platforms to seal this portion. However, there is a gap at the end portions, so that cooling air leaks from the lower part of platform. Since the seal plate is inserted in the groove to block the gap, the sealing property is increased.

La présente invention concerne une plaque d'étanchéité à la partie plate-forme d'une aube mobile de turbine à gaz. La plaque d'étanchéité est insérée dans une ouverture entre les plates-formes adjacentes à chaque partie d'extrémité d'une goupille de retenue pour empêcher les fuites d'air vers l'extérieur. Une rainure est prévue à chacun des quatre coins de la partie d'extrémité de la plate-forme de l'aube mobile, et la plaque d'étanchéité est insérée de manière à couvrir l'ouverture et à prolonger les parties d'extrémité des plates-formes adjacentes, bloquant ainsi l'ouverture entre les plates-formes. Une goupille de retenue et des goupilles de retenue d'extrémité sont insérées entre les plates-formes pour assurer l'étanchéité de cette partie. Toutefois, une ouverture aux parties d'extrémité permet à l'air de refroidissement de s'infiltrer de la partie inférieure de la plate-forme. Puisque la plaque d'étanchéité est insérée dans la rainure pour bloquer l'ouverture, l'étanchéité est améliorée.

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