Turbofan turbofan engine rotor support system

摘要

The utility model relates to engine building, and in particular to support systems of a rotor of a fan of a turbojet bypass engine (turbofan engine). The fan rotor support system of the turbofan engine includes a bearing frame with bearing supports mounted on it, designed to install a rotor shaft kinematically connected to the fan and low-pressure compressor containing a disk with a hub. The front support is made in the form of a roller bearing placed in a conical shell associated with the supporting frame. The back support is made in the form of an angular contact ball bearing, including an outer ring mounted in a corresponding housing containing a flange connected to the corresponding supporting surface of the supporting frame using clamps, and an inner ring mounted in a conical housing connected by clamps to the mounting ring, fixed to the rotor shaft. The latches are made with the possibility of destruction at a given level of load. The conical shell of the roller bearing is connected to the supporting frame by means of clamps. The flange of the housing of the outer ring of an angular contact ball bearing is located in front of the corresponding supporting surface of the bearing frame in the direction of flight. The support system is equipped with an axial holding device and additional centering of the rotor shaft, made in the form of Z-shaped brackets mounted axisymmetrically with a certain gap between the hub of the low pressure compressor disk and the middle shelves of the brackets, one of the parallel flanges of each bracket is directed towards the low pressure compressor, and the oppositely directed parallel flange of each bracket is rigidly connected to the supporting frame. The technical result consists in increasing the reliability of the turbine fan rotor support system during its operation. 3 s.p. f-s, 3 ill.