Turbine rotor device with pressing structure

Abstract

The invention relates to a turbine rotor device with a pressing structure. The turbine rotor device comprises a blade and a wheel disc which are connected through a fir-shaped tenon and mortises in amatched mode, and further comprises a pressing device installed in a gap between the tenon and the mortises in an interference mode, a bottom face supporting plate arranged on the pressing device is located at the bottom of the mortises and attached to the end face of the tenon, and supporting columns are symmetrically arranged in gaps between the two sides of tenon teeth of the tenon and the mortises, so that the tenon teeth are pressed on the inner walls of the mortises. According to the turbine rotor device, the relative positions of the tenon teeth and the mortises are fixed, the area of gaps where cold air passes through is increased, the temperature of a wheel flange part and the connecting positions of the blade tenon and the wheel disc mortises is reduced, the thermal stress of theblade tenon is reduced, and the creep life of the blade tenon, the wheel disc mortise structure and a wheel disc wheel flange is prolonged.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a turbine rotor device with a compression structure. Background technique [0002] Aeroengine turbine rotors usually use fir-tree tenon and tongue-and-groove connection structures to realize the assembly of turbine disks and blades. This structure is an important part of the aeroengine structure, and the rationality of its structural design is directly related to the strength, life and reliability of the rotor components. properties, and greatly affect the thrust-to-mass ratio of the engine. At present, the aero-engine turbine rotor adopts a fir tree-shaped tenon and tenon-groove connection structure. It reaches or even exceeds 900K, and produces high thermal stress. At the same time, the fretting friction between the tenon of the blade and the tenon and groove of the wheel will greatly reduce the service life of the turbine rotor. With the continuous improvement of the per...

AI Technical Summary

Problems solved by technology

[0002] Aeroengine turbine rotors usually use fir-tree tenon and tongue-and-groove connection structures to realize the assembly of turbine disks and blades. This structure is an important part of the aeroengine structure, and the rationality of its structural design is directly related to the strength, life and reliability of the rotor components. properties, and greatly affect the thrust-to-mass ratio of the engine. At present, the aero-engine turbine rotor adopts a fir tree-shaped tenon and tenon-groove connection structure. It can reach or even exceed 900K, and generate high thermal stress. At the same time, the fretting friction between the tenon of the blade and the tenon and groove of the wheel will greatly reduce the service life of the turbine rotor

With the continuous improvement of the performance requirements of aero-engines, the working environment of turbine components is becoming more and more harsh. The shortcomings of the traditional fir-tree-shaped tenon-tenon connection structure are more and more obvious, which can no longer meet the high-quality requirements.

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