Engine damage detection method based on electromigration

A damage detection and engine technology, applied in internal combustion engine testing, measuring devices, instruments, etc., can solve the problems of low accuracy, misjudgment, missed judgment, etc., and achieve the effect of improving reliability and accuracy

Inactive Publication Date: 2019-08-02
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned problems of misjudgment or missed judgment and low accuracy due to the existence of subjective judgment

Method used

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  • Engine damage detection method based on electromigration
  • Engine damage detection method based on electromigration
  • Engine damage detection method based on electromigration

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Experimental program
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Effect test

Embodiment Construction

[0019] Such as Figure 1 to Figure 3 As shown, an engine damage detection method based on electromigration has the following steps: Step 1, multi-stage separation, the particles generated by the damage of the aeroengine blades and discs, through the electromigration characteristics, use the analyzer to perform multi-stage separation of the particles Separation, establish the coupling model between charging voltage, particle size, and particle charge, and study the separation cut-off diameter and separation efficiency of the analyzer under various factors;

[0020] Step 2, optical detection, so that the sampling airflow containing particles enters the optical detection module, so that the particles grow to the micron level, reaching the detection lower limit of the light scattering principle;

[0021] Step 3, laser detection, the laser is irradiated on the condensed particles at a certain angle through the optical lens, the incident light is scattered and converted into an opti...

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Abstract

The invention relates to an engine damage detection method based on electromigration and solves problems of misjudgment or missed judgment and low accuracy in the prior art, which are caused by a problem of subjective judgment of an instrument. The invention adopts the scheme that according to a generation mechanism that damages of a blade, a wheel disk and the like of an aviation engine generateparticulate matter, the particulate matter is classified by electromigration and a coupling model between a charge voltage and a particle size of the particulate matter as well as a charge quantity ofthe particulate matter is established; and a mapping relationship among particle size distribution, particle size detection, a particulate matter density and the damages of the blade and the wheel disk is explored. According to the invention, a wear degree of the engine can be accurately detected out, reliability of data detection is improved, a hazard fault of the engine is reduced, and the engine damage detection method has the great significance and application value.

Description

technical field [0001] The invention relates to the field of aero-engine detection, in particular to an engine damage detection method based on electromigration. Background technique [0002] An aeroengine is a highly complex and sophisticated thermomechanical engine that provides the aircraft with the power required for flight. As the heart of an aircraft, it is known as the "Flower of Industry". It directly affects the performance, reliability and economy of an aircraft, and is an important manifestation of a country's technological, industrial and national defense strength. Because the scope of application of aviation aircraft is gradually expanding, the complexity of the aero-engine system is gradually deepening. Although the flight level has been improved, the probability of flight accidents has also increased relatively. Therefore, ensuring the stability and reliability of the aero-engine can fundamentally avoid the aviation flight process accident occurred. The main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/05G01N15/06G01N15/02
CPCG01M15/05G01N15/0211G01N15/0656
Inventor 刘丹丹汤春瑞赵文帝梁永波董春花景明明韩东志马武马权
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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