Oil sump buffer seal

Details Oil sump buffer seal Oil sump buffer seal

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/40 (2006.01) F01D 11/04 (2006.01) F01D 25/18 (2006.01) F16J 15/447 (2006.01)

Patent

CA 2389357

A buffer seal arrangement (60) is provided for improved buffer sealing of oil sump seals (39) in gas turbine engines. The buffer seal arrangement includes a three section labyrinth seal (69, 70, 71). Disposed between the first and second (71) section is a buffer air supply annulus (72) for delivering pressurized air from the engine to said first and second sections of the seal. Oil drains (82, 92) are disposed between said second and third (69) sections and adjacent the third section. The first section has four knife seals, and the second and third sections have three knife seals. Rig testing has shown that this buffer seal arrangement can prevent the leakage of oil into the gas path of the gas turbine engine.

L'invention concerne un arrangement de joint tampon permettant d'améliorer l'étanchéité tampon des joints de carter d'huile dans les moteurs à turbine à gaz, qui comprend un presse-garniture à trois parties. On trouve entre les première et deuxième parties un anneau de fourniture d'air tampon qui apporte à ces parties de l'air sous pression en provenance du moteur. Des drains d'huile sont placés entre les deuxième et troisième parties, en position adjacente à la troisième partie. La première partie comprend quatre joints à lame, et les deuxième et troisième parties en comportent trois. Les essais au banc ont montré que cet arrangement empêchait les fuites d'huile dans le trajet de passage des gaz du moteur à turbine à gaz.

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