Deformed tooth and machining process of aero-engine driven by gradient memory alloy

Abstract

The invention relates to an aero-engine deformable tooth driven by a gradient memory alloy, which includes a tooth-shaped body, and the tooth-shaped body includes an inner substrate, an outer substrate and several intermediate substrates, and the inner substrate is Pure SMA powder material, the outer layer substrate is pure aluminum alloy powder material, the middle layer substrate is mixed with aluminum alloy powder and SMA powder in proportion to form a mixed material, and the mixed material is mixed with pure SMA powder material, pure aluminum alloy The powder material is integrally formed by laser cladding and layer-by-layer sintering, and the volume ratio of the SMA powder of the mixed material of the intermediate substrate increases linearly from the outside to the inside. The processing technology of deformed teeth of aero-engines driven by gradient memory alloys of the present invention adopts a laser cladding and layer-by-layer sintering integral molding process, so that shape memory alloys and aluminum alloys are gradiently compounded to realize controllable deformation under different temperature environments, thereby Interfere with the exhaust jet flow of the engine and reduce the airflow noise.

Description

technical field [0001] The invention belongs to the technical field of aero-engine deformed teeth, in particular to an aero-engine deformed tooth driven by a gradient memory alloy. Background technique [0002] Since the invention of airplanes, the noise of airplanes has been very harmful to the residents near the airport and the staff in the airport area. After the aircraft is started, the mixture of the hot jet flow, fan flow and free air flow of the high bypass ratio turbofan engine will generate strong ambient noise, which will cause people within a certain range to be harmed by the noise. Therefore, reducing aircraft engine noise is one of the major issues facing the current aviation industry. [0003] In order to reduce the noise generated by the engine, the Boeing Company of the United States proposed Variable Geometry Chevron (VGC for short) in 2005, that is, a zigzag aerodynamic device that can change the geometry is arranged at the tail of the engine exhaust pipe....

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an aeroengine deformable tooth driven by gradient memory alloy, which can deform the engine deformable tooth and alleviate the problems of sudden stress caused by thermal expansion mismatch.

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