Vibration fault detection system and method for aero-engine

Abstract

The invention discloses a vibration fault detection system and method for an aero-engine. The system comprises a test accommodating cavity which is used for providing a test environment for cyclic replacement from low pressure to high pressure for the aero-engine; a mounting assembly which is used for supporting the aero-engine; a sensor network assembly which is fixed to a shell of the aero-engine and forms a monitoring network so as to monitor the vibration frequencies of different point locations of the aero-engine in real time. a sound wave collection assembly which is used for determining sound wave changes of the aero-engine in a low-pressure to high-pressure test environment; and a data processing system which judges a vibration fault according to the vibration amplitude of the monitoring data of the sensor network assembly from low voltage to high voltage and the sound wave change outputted by the sound wave collection assembly; the data processing system distinguishes pure mechanical vibration and sound wave interference vibration of the aero-engine and judges different faults of the aero-engine by circularly replacing the test environment in the test accommodating cavity; according to the method, the new vibration faults of the aero-engine are identified by analyzing the vibration amplitudes under different working frequencies respectively.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a vibration fault detection system and method of an aero-engine. Background technique [0002] Aeroengine is a kind of highly complex and precise thermal machinery. As the heart of aircraft, it is not only the power of aircraft flight, but also an important driving force to promote the development of aviation industry. Every important change in the history of human aviation is closely related to the technological progress of aeroengine Inseparable. Vibration detection is one of the means of state detection. Any machine will vibrate during the process of converting input energy into useful work. Seriously, different faults cause different vibration characteristics, and the same vibration may be different faults. [0003] At present, most vibration fault detection systems mainly rely on manual inspection of the vibration sensor to judge the fault of the engine vibration test ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a vibration fault detection system and method of an aero-engine, so as to solve the problem that only vibration faults can be detected in the prior art, but cannot be detected Technical problems in the process of determining the cause of failure

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