A turbine rotor device with enhanced cooling structure

Abstract

The invention relates to a turbine rotor device with a reinforced cooling structure, comprising blades and discs connected through fir tree-shaped tenons and tenon grooves, each bottom surface of the tenon grooves contains several cooling devices arranged at intervals. There is a gap between the cooling device and the bottom of the tenon tooth corresponding to the tenon, so that the top of the cooling device and the bottom of the tenon are not in contact with each other when the turbine rotor is working, so that the tenon and the tenon-groove structure are in working condition It can expand freely; it not only meets the flow requirement of the cooling airflow, but also greatly increases the heat exchange area of ​​the cold air, effectively improves the cooling efficiency, reduces the temperature at the rim of the wheel disc, and at the same time reduces the temperature on the entire wheel disc. The temperature gradient reduces the thermal stress on the wheel, reduces the overall stress level of the wheel, and makes the turbine wheel have a longer service life.

Description

Technical field [0001] The present invention relates to the field of aero engine technology, particularly to a turbine rotor apparatus with a reinforced cooling structure. Background [0002] At present, the turbine rotor of the aero engine is usually a turbine disc and blade, the tenon of the turbine blade, the tenon connection part of the wheel disc has a higher working temperature, which can reach 900K or even higher, the turbine disc is a very important rotor component of the aircraft engine, and the driving torque inside the engine bears the role of driving the engine, and the turbine disc bears complex thermal load and mechanical load under the working state, especially in the rim of the turbine disc, and its working temperature is higher. The higher working temperature makes the mortise groove at the rim of the wheel more sensitive to creep performance, so that the temperature gradient on the wheel is larger, generating greater thermal stress, and also reduces the stress l...

AI Technical Summary

Problems solved by technology

[0002] At present, the turbine rotor of an aeroengine is usually a turbine disk and blades. The working temperature of the tenon of the turbine blade and the tenon and groove connection of the wheel disk can reach 900K or even higher. The turbine disk is a very important rotor part of the aeroengine. The transmission torque drives the engine to run. In the working state, the turbine disk bears complex thermal and mechanical loads, especially at the rim of the turbine disk. The tenon and groove are more sensitive to creep performance, which makes the temperature gradient on the wheel disc larger, resulting in greater thermal stress, and also reduces the stress level that the rim tenon and groove can withstand, reducing the service life of the wheel disc, and at the same time Determines the life of the overall structure of the turbine disk. At present, the traditional method of cooling the rim of the turbine disk is to ventilate and cool the gap between the mortise and tenon grooves. The cooling effect still cannot meet the continuous improvement of performance requirements of aero-engines.

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