Patent ID: 6516618
Filing Date: 2003-02-11
Classification: F01D,F02C

Abstract:
A method for preventing lubricating oil from a turbine shaft bearing chamber of a gas-turbine engine from escaping into an interior portion of the engine carrying turbine blades, comprising:pressure sealing an interior of the bearing chamber from the interior portion of the engine carrying the turbine blades; providing a single scavenge line between the interior of the bearing chamber and a lubricating oil collecting compartment to scavenge lubricating oil supplied to the interior of the bearing chamber and convey the lubricating oil to the lubricating oil collecting compartment; and sizing the scavenge line so that a pressure in the interior of the bearing chamber is essentially equal to a pressure in the lubricating oil collecting compartment and maximally half a pressure in the interior portion of the engine carrying the turbine blades.