A device and method for preparing a foreign object damage gap of a blade leading edge simulation part

Abstract

The invention relates to a device and method for preparing a foreign object damage gap of a blade leading edge simulation part. The device consists of four major components: a positioning fixture, a cylindrical seat, a pressure head, and a pressure plate: the cylindrical seat is fixed on a test bench; the positioning fixture uses bolts Fixed on the test bench; the test piece is placed in the positioning fixture, and the positioning fixture is fixed to the cylindrical base by two relatively downward slots of the cylindrical base; the bosses at both ends of the positioning fixture limit the movement of the cylindrical base along the slot direction; The indenter is located in the other two opposite, upward slots of the cylindrical seat, and is in contact with the top of the test piece where a notch needs to be prepared; the pressure plate is located at the top, and the notch is created by the impact of falling heavy objects.

Description

Technical field [0001] The invention belongs to the technical field of aeroengines, and specifically relates to a device and method for preparing a foreign object damage gap of a blade leading edge simulation part. Background technique [0002] Aero engines are called the "crown jewels" in industrial manufacturing. During the working process of the compressor blades in aero engines, the impact of foreign objects such as sand and stones causes gaps on the leading edges of the blades. Under the action of air flow excitation and centrifugal load, , will significantly reduce the fatigue resistance of the blade. It is mentioned in the aeroengine design specifications GJB241-87 and GJB242-87 that damage caused by small particles with high hardness is called foreign object damage (FOD), and the engine blades need to reach a certain High cycle fatigue life. Therefore, it is necessary to carry out research on the fatigue performance of compressor blades caused by external damage, a...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a preparation device and method for simulating the damage gap caused by foreign objects at the leading edge of the blade, solve the problem of simulating the gap caused by foreign object damage in the engine, overcome the difficulty of loading, and reduce the dispersion of results , able to perform notch preparation experiments on various materials

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