Turbine disc rigidity self-reinforcement turbine structure

Abstract

The invention relates to a turbine disc rigidity self-reinforcement turbine structure. The turbine disc rigidity self-reinforcement turbine structure comprises a shell, a first-stage turbine stator, a second-stage turbine stator, a first-stage turbine rotor, a second-stage turbine rotor, a graphite ring and the like, wherein the first-stage turbine stator and the second-stage turbine stator are arranged in the shell; the first-stage turbine rotor and the second-stage turbine rotor are provided with turbine disc rigidity self-reinforcement structures. The turbine stators are connected with the shell. The first-stage turbine rotor and the second-stage turbine rotor are fixed to the central axis of the shell through a rotary shaft after being connected through the turbine disc rigidity self-reinforcement structures. The graphite ring arranged in a disc hole of the second-stage turbine stator and a second-stage turbine rotor labyrinth structure form contact seal. When the turbine rotors rotate at high speed, the lapping joint tightness of the turbine disc rigidity self-reinforcement structures is improved, and the synthetical stiffness of the first-stage and second-stage turbine rotors is improved, so that the vibration safety is improved.

Description

technical field [0001] The invention relates to a turbine structure with self-enhanced stiffness of a turbine disc, which can be applied to combined engines of aviation, spaceflight and near space. Background technique [0002] Two-stage disk turbines are widely used in the fields of aviation, spaceflight and near-space combined engines. Under the design specifications of the engine's large thrust-to-weight ratio and the requirements of the rotordynamic characteristics of the engine shafting, the thickness of the turbine rotor disk can meet the strength requirements. Gradually thinning; the stiffness of the wheel disc decreases after the thickness is thinned, and the frequency of the wheel disc itself decreases. In a high-speed rotating environment, the coupling effect with the rotation frequency results in insufficient vibration safety and affects the reliability of the turbine. In order to improve the stiffness of the wheel disk in the high-speed rotating environment, tie-...

AI Technical Summary

Problems solved by technology

[0002] Two-stage disk turbines are widely used in the fields of aviation, spaceflight and near-space combined engines. Under the design specifications of the engine's large thrust-to-weight ratio and the requirements of the rotordynamic characteristics of the engine shafting, the thickness of the turbine rotor disk can meet the strength requirements. Gradually thinning; the stiffness of the wheel disc decreases after the thickness is thinned, and the frequency of the wheel disc itself decreases. In a high-speed rotating environment, it couples with the rotation frequency, resulting in insufficient vibration safety and affecting the reliability of the turbine.

In order to improve the stiffness of the wheel disk in the high-speed rotating environment, tie-rod and drum structures are generally used in the design of multi-stage turbines. no obvious advantage

Images