GAS-TURBINE ENGINE SUPPORT Russian patent published in 2011 - IPC F02C7/06 

FIELD: engines and pumps.

SUBSTANCE: nut includes threaded part facing the inner race of bracket and lead-in part opposite to it, which has lead-in chamfer along outer surface, middle cylindrical part, installation cone and rear cylindrical part which is equal as to diametre to outer diametre of inner race of roller bearing. On inner side of lead-in part of the nut there made are radial protrusions forming the slots between each other to arrange axial locks which are rectangular in cross section. Slots are connected through radial holes to outer surface of middle cylindrical part of the nut. In the shaft there are mating slots for rectangular locks; at that, locks are provided with axial shanks arranged in mating slots of the shaft under the nut thread and fixed in axial direction with expansion elastic ring installed on inner side of lead-in part. During the operation of the support, rectangular locks of increased mechanical strength shall secure the nut in circumferential direction relative to the shaft. Since during the assembly of rotor there is no plastic deformation of locks, then in case there are no mechanical damages, locks can be used for many times.

EFFECT: improving reliability of the support owing to excluding the damage to the bearing rollers during the assembly of support and by increasing mechanical strength of the lock.

3 dwg