Aero-engine bearing nut anti-loosening structure

Abstract

The application relates to an aviation engine bearing nut anti-loosening structure, which comprises a shaft neck body, a bearing inner ring and a bearing nut, the bearing inner ring and the bearing nut are sleeved at the end of the shaft neck body, a plurality of lock grooves are arranged on the bearing nut, a lock block is arranged in each lock groove, an inner part of the lock groove is provided with a groove body inclined surface and a groove body wedge surface, the cross section shape of the lock block is dumbbell-shaped, the lock block extends at an included angle less than 30 DEG in the tangential direction of the shaft neck outer ring in the lock groove, one end of the lock block away from the shaft neck outer ring abuts against the groove body inclined surface, and one end of the lock block close to the shaft neck outer ring abuts against the shaft neck outer ring and the groove body wedge surface respectively, the end part of the lock block is in a wedge-shaped friction self-locking state between the bearing nut and the shaft neck body through mutual extrusion of the lock block, the lock groove and the shaft neck outer ring, the loosening of the bearing nut is prevented, and the application has the advantages of simple assembly operation, high assembly efficiency, cost saving and high precision of bearing pre-tightening force control.

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