System and method for controlling backbone bending in a gas turbine engine

Abstract

A flexible coupling for a gas turbine engine includes a fan hub frame having a first flange and a core engine having a second flange. The first flange includes a first plurality of fingers extending from a face of the flange and the second flange includes a second plurality of fingers extending from a face of the second flange. The second plurality of fingers of the second flange is complementary to the first plurality of fingers extending from the first flange. The first flange and the second flange are coupled together in form-fitting engagement such that the first plurality of fingers and the second plurality of fingers form an interdigitated configuration.

Description

BACKGROUND [0001]The subject matter described herein relates generally to gas turbine engines and, more particularly, to a flexible coupling system between a turbine engine fan frame and an engine core to facilitate reducing engine backbone bending.[0002]At least some known turbine engines direct a portion of a process fluid, i.e., air, from an engine inlet through the compression, combustion, and turbine sections of the engine core. Generally, a fan assembly pushes air into the compression section where a compressor compresses the air. The compressed air is suitably mixed with a fuel and channeled to a combustor where the fuel-air mixture is burned to generate hot combustion gases. The combustion gases are channeled to at least one turbine, where energy is extracted from the combustion gases for powering the compressor, as well as for producing useful work, such as propelling a vehicle.[0003]Some known turbine engines are supported by an aircraft structure, for example, by a pylon ...

AI Technical Summary

Benefits of technology

The patent describes a flexible coupling system for a gas turbine engine that allows for the coupling of two parts called flanges. The flanges have finger-like features that fit together to form a secure and tight connection. This coupling system can be used in a turbine engine assembly that includes a nacelle and a fan assembly. The fan assembly has blades and a fan hub frame with a flange, while the core engine has another flange with complementary fingers. The two flanges are connected together in a unique way that allows for the transfer of aerodynamic loads from the fan to the nacelle. The method also includes steps to control the bending of the engine's backbone, which is the main shaft that connects the fan to the engine. Overall, the flexible coupling system and the method for controlling backbone bending provide improved performance and efficiency of gas turbine engines.

Problems solved by technology

The resultant backbone bending induces a potential for increased rubbing between the rotating components and the adjacent stationary structures.

The increased rubbing adversely impacts engine performance, specific fuel consumption, and the life of rotating component wear strips, and may lead to more frequent engine maintenance or reduced engine “time on wing.” Fuel costs and desirability for improved durability accentuate the need for designs and systems for reducing backbone bending.

Images