FLEXIBLE SUPPORT STRUCTURE FOR GEARED ARCHITECTURE OF GAS TURBINE ENGINE Russian patent published in 2016 - IPC F01D25/28 F01C21/00 B64D27/10 

FIELD: engines.

SUBSTANCE: invention relates to gas turbine engine (versions). Engine frame is made with definite intrinsic lateral stiffness and intrinsic transverse stiffness and supports a fan shaft. Gear transmission rotates fan shaft. Flexible support partially supports gear transmission. For flexible support there is lateral stiffness in relation to lateral stiffness of frame and there is transverse stiffness in relation to transverse stiffness of frame. Said lateral stiffness of flexible support is less than lateral stiffness, and said transverse stiffness of flexible support is less than transverse stiffness of frame. For input coupling of gear transmission there is lateral stiffness in relation to lateral stiffness of frame and there is transverse stiffness in relation to transverse stiffness of frame, and it is less than 11 % lateral stiffness. In second version for input coupling of gear transmission there is lateral stiffness in relation to lateral stiffness of gearing and there is transverse stiffness in relation to transverse stiffness of gearing, wherein said lateral stiffness of flexible support is less than lateral stiffness of gearing. Transverse stiffness of flexible support is less than transverse stiffness of gearing and is less than 5 % lateral stiffness of gearing.

EFFECT: technical result consists in prevention of bending of bearing structure of engine.

8 cl, 8 dwg