Patent ID: 7565796
Filing Date: 2009-07-28
Classification: F01D,F02C,F02K,F05D,Y02T

Abstract:
1. A casing for an aircraft turbofan bypass engine, the casing comprising: a case adapted to encircle the engine and having a plurality of engine mounts thereon adapted to mount the engine to an aircraft; an inner hub inside the outer case and supporting a main shaft bearing concentrically aligned with the outer case; a plurality of struts each extending radially between the inner hub and the case, the struts fixedly mounted to the inner hub and to the case so as to define a primary load path from the inner hub to the case for transfer of bearing loading from the inner hub to the case, wherein the struts are thin-walled struts having a compressive strength selected to cause a said strut to plastically deform in response to the application of a pre-selected bearing loading compressing the strut in a direction of said load path, the deformation thereby limiting bearing load transfer from the inner hub to the case through said struts to an amount below said pre-selected load.