Rotary air film cooling temperature gradient thermal mechanical fatigue test system

Abstract

The invention discloses a rotary air film cooling temperature gradient thermal mechanical fatigue test system which comprises a loading subsystem, a heating subsystem, a power subsystem, an air cooling subsystem and a control subsystem. By improvement on an existing tester, a test piece frictionizes air under a rotating working condition, thereby generating an air film cooling temperature gradient field, and the test piece can bear a uniaxial tension load during rotating; the problem on simulation of a test environment for a temperature gradient field of the test piece is better solved; the operation method is simple and feasible and low in cost. By the adoption of the rotatable test piece, the conventional thermal mechanical fatigue test system is improved, and the air film cooling temperature gradient field under a working state of a blade really reappears; successful operation of a thermal mechanical fatigue test on a turbine blade of an aero-engine is guaranteed, and a technical basis and a safety guarantee are supplied to safe and reliable work of the aero-engine.

Description

technical field [0001] The invention belongs to the technical field of aerospace engine testing, and relates to a single crystal turbine blade thermomechanical fatigue test system for an aeroengine, in particular to a rotating air film cooling temperature gradient thermomechanical fatigue test system capable of simulating the temperature gradient service environment of a single crystal turbine blade . Background technique [0002] The thermomechanical fatigue (TMF) performance of single crystal turbine blades is one of the important performance indicators of aeroengines, and is an important factor affecting the service life of turbine blades. The service process of the blade and the air friction produce a film cooling temperature gradient field in the blade structure. The temperature gradient field changes with the engine's working state, directly affecting the mechanical properties of the turbine blade, and even causing material damage. In the laboratory environment, in or...

AI Technical Summary

Problems solved by technology

However, the above-mentioned temperature control system is expensive, the process is complex, and the cooling effect is poor. It is necessary to purchase special test instruments, and special personnel to monitor the test process, and the temperature controllability is poor. The temperature field cannot achieve the accurate expected effect, and it is not easy to test and measure

In particular, the existing test equipment cannot truly reproduce the film-cooled temperature gradient field caused by the rotation and air friction of the specimen.

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