Intermediate fulcrum outer ring supporting structure of engine

Abstract

The invention belongs to the field of intermediate case design, and relates to an engine intermediate fulcrum outer ring supporting structure which comprises a bearing, a low-pressure rotor, a high-pressure rotor and a sealing ring. The outer ring of the second bearing is axially compressed and positioned by arranging the mounting side plate to be in bolted connection with the sealing ring and the low-pressure rotor, a bearing seat and a first compression nut in a traditional structure are omitted, and the mounting side plate is arranged between the sealing ring and the low-pressure rotor, so that the outer ring of the second bearing is axially compressed and positioned at the same temperature. Thermal barrier deformation on the sealing ring and the low-pressure rotor can only be transmitted to the mounting side plate, the outer ring of the second bearing cannot be influenced by the sealing ring and the low-pressure rotor, the bearing cannot be loosened, the problems of vibration of the whole machine, damage to the bearing and the like cannot be caused, and the safety of the engine can be guaranteed; and the relative positions of the sealing ring, the mounting side plate and the low-pressure rotor are not changed, so that the mounting side plate, namely the reliable axial and radial positioning of the bearing, is realized, and the positioning reliability of the intermediate fulcrum outer ring is ensured.

Description

technical field [0001] The present application belongs to the field of intermediate fulcrum design, and in particular relates to an engine intermediate fulcrum outer ring support structure. Background technique [0002] The intermediate fulcrum is a form of fulcrum commonly used in the current dual-rotor aviation turbofan engine, including the fulcrum bearing, the oil supply and return structure of the cooling and lubricating bearing, and the sealing structure of the bearing cavity. Compared with the turbine interstage bearing frame, the intermediate fulcrum has the advantages of compact structure and lower temperature load of the turbine end bearing frame. However, since the intermediate fulcrum is supported between the high and low pressure rotors, the intermediate fulcrum bearing has higher requirements on the reliability of the support structure to prevent the high and low pressure rotors from coupling vibration caused by the deflection of the inner and outer rings of th...

AI Technical Summary

Problems solved by technology

[0008] The purpose of this application is to provide a support structure for the outer ring of the intermediate fulcrum of the engine to solve the problem of separation and loosening caused by unstable cooperation between the outer ring of the intermediate bearing and the bearing housing in the prior art

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