GAS TURBINE ENGINE SEALING BUSHING Russian patent published in 2000 - IPC

FIELD: mechanical engineering; gas turbine engines. SUBSTANCE: proposed sealing bushing of gas turbine engine has axial projections with labyrinth strips and uniformly arranged channels to deliver cooling air. Ratio of length L of channel inlet hole to channel width b is 1-3. Ratio of size of land m between near inlet holes to width b inlet hole is 0.6 - 1.1. Ratio of minimum length n of channel to width b of channel inlet hole is within 0.6 and 3. EFFECT: enhanced reliability of engine in operation owing to reduction of thermal stresses, prevention of cracking and provision of cleaning of cooling air. 4 dwg