Defeatable rotor support structure and aero-engine

Abstract

The invention relates to a rotor supporting structure which can be invalid and an aero-engine. The rotor supporting structure which can be invalid comprises a main supporting wall (1) and an auxiliarysupporting wall (2) arranged in the radial direction of a rotor (4) of the engine and can support the rotor (4) through the main supporting wall (1) when the engine works normally and cut off a forcetransfer path of the main supporting wall (1) when fan blades (9) sheds, and the auxiliary supporting wall (2) supports the rotor (4). After the main supporting wall of the rotor supporting structureis invalid, the auxiliary supporting wall continues to support the rotor to some degree so as to avoid caused rotor and stator bumping friction by severe deformation of a receiver, and the performance and safety requirements of the engine are met in a short time.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to an invalid rotor support structure and an aero-engine. Background technique [0002] In the design of aero-engines, airworthiness inclusive regulations must be passed. The most stringent condition is that when the fan blades fall off, the engine can contain the damaged blades, and it must continue to operate at the windmill speed for a certain period of time after the engine is turned off. When the fan blade falls off (FBO, Fan Blade Out), the engine runs at a relatively high speed, and the radial unbalanced load (FBO load) generated is very large, reaching tens of tons, and the radial unbalanced load is transmitted to the bearing support through the bearing The structure is then transferred to the intermediate casing, and then transferred to the aircraft through the installation joint system. If the engine is required to fully bear the FBO load, high requirements will be pl...

AI Technical Summary

Problems solved by technology

[0003] On the one hand, the traditional method to deal with FBO load is to strengthen the strength of the engine, such as strengthening the strength of fan bearings, bearing supports, intermediate casings, mounting joints and thrust rods, etc., and this design has a large safety margin when the engine is running normally. The weight of the engine is greatly increased, especially in modern civil aviation, it will affect the fuel economy of the engine, and it will be in a disadvantageous position in the market competition

[0004] On the other hand, by changing the structure of a local single part, only the strength of a single part can be reduced, so that it can cause fracture failure and achieve load reduction. However, this type of structure has a single function, which will increase the structural complexity of subsequent products and the cost of manufacturing and maintenance.

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