Thermal mechanical fatigue test system and method for performing hollow turbine blade superposed high-cycle vibration

Abstract

The invention relates to a thermal mechanical fatigue test system and method for performing hollow turbine blade superposed high-cycle vibration. The test system comprises a high / low-cycle load loading subsystem, a temperature load loading subsystem, a cooling subsystem and a load coordination control subsystem, wherein the high / low-cycle load loading subsystem is used for independently applying high / low-cycle loads to turbine blades which are stably clamped by a special fixture; the temperature load loading subsystem is used for heating assessment sections of the turbine blades; the cooling subsystem comprises a water cooling part and an air cooling part; the water cooling part is used for cooling in a test process; the air cooling part is used for coordinating a temperature cycle in the test and simulating cooling conditions inside the blades; and the load coordination control subsystem is used for controlling each system to operate in a coordinated manner. According to the test system disclosed by the invention, the stress field, temperature field and vibration conditions in the assessment section service process of the turbine blades and the cooling conditions inside the blades can be simulated, the thermal mechanical fatigue test for superposed high-cycle vibration of the turbine blades is performed, and a guarantee is provided for safe and reliable operations of aircraft engines.

Description

technical field [0001] The invention relates to a composite fatigue test system and method for aeroengine turbine blades, in particular to a thermomechanical fatigue test system and method for a hollow turbine blade with superimposed high-cycle vibration, which can simulate the stress field and temperature of the turbine blade assessment section during service Field, vibration and internal cooling of the blades. On this basis, thermomechanical fatigue tests of hollow turbine blades superimposed with high-cycle vibration can be carried out to test the life of turbine blades and provide guarantee for the safe and reliable operation of aero-engines. It belongs to the technical field of aero-engines . Background technique [0002] Aeroengine turbine blades are subjected to harsh service conditions, not only bearing alternating mechanical loads and thermal loads, but also bearing lateral vibrations induced by aerodynamic loads and their own small-amplitude, high-frequency high-cy...

AI Technical Summary

Problems solved by technology

However, this solution is aimed at the mortise joint structure of the turbine, and cannot adjust the stress distribution of the real blade body

[0005] To sum up, on the basis of the existing technical conditions, it is impossible to adjust the stress state of the turbine blade assessment section and apply high and low cycle loads at the same time, so it is impossible to realize the thermomechanical fatigue test of the superimposed high cycle vibration of the turbine blade

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