Detection-diagnosis device and method for vibration fault of aeroengine

Abstract

The invention provides a detection-diagnosis device and method for a vibration fault of an aeroengine. The device comprises a three-axial-direction vibration sensor, a vibration analyzer and an industrial control computer; the three-axial-direction vibration sensor is mounted on a casing of the aeroengine with a vibration standard exceeding fault, and measures vibration in horizontal, vertical and axial directions of the aeroengine with the fault; the vibration analyzer supplies power to the three-axial-direction vibration sensor, detects a vibration fault signal, obtains a vibration fault characteristic atlas according to the detected vibration fault signal, and outputs the vibration fault characteristic atlas and the vibration signal to the industrial control computer; and the industrial control computer diagnoses the vibration fault of the aeroengine with the fault according to the vibration fault signal, and obtains the type of the vibration fault of the aeroengine by diagnosis. The device and method are applied to whole-machine vibration test analysis and vibration fault diagnosis and elimination fields during rack test of the aeroengine, to vibration fault analysis and diagnosis in outfield engine ground test and airplane flight process, and to vibration fault analysis and diagnosis when a core unit is tested.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a device and method for detecting and diagnosing vibration faults of aero-engines. Background technique [0002] More than 90% of aero-engine structural strength failures are caused by or related to vibration. The reasons for these phenomena are mainly due to the lack of deep understanding of the vibration of the whole machine during design and use, the lack of systematic design theory and methods, backward test methods and analysis methods, and imperfect evaluation standards. [0003] At present, the vibration analysis and diagnosis technology of aero-engine mainly adopts single-axis vibration sensor to measure the vibration in the horizontal or vertical direction, and uses FFT spectrum analysis or speed tracking technology to analyze and diagnose the vibration fault signal. [0004] The disadvantages of the prior art are: [0005] 1) The vibration sensor is installed on ...

AI Technical Summary

Problems solved by technology

[0005] 1) The vibration sensor is installed on the casing, and the vibration signals picked up at different positions are affected by the transmission path differently, which affects the vibration analysis and diagnosis results;

[0006] 2) Axial vibration is important information in the process of engine vibration fault analysis and diagnosis

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