Acoustic diagnosis method and device for crack fault of air inlet casing support plate of engine

A technology of air intake casing and diagnostic method, which is applied in the direction of measuring devices, scientific instruments, and the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., to achieve accurate identification and efficient diagnosis.

Pending Publication Date: 2022-03-25
AECC SHENYANG ENGINE RES INST
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Problems solved by technology

[0017] The purpose of this application is to provide a method and device for acoustic diagnosis of crack faults in the support plate of the engine intake casing, so as to solve or alleviate at least one of the above-mentioned problems

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  • Acoustic diagnosis method and device for crack fault of air inlet casing support plate of engine
  • Acoustic diagnosis method and device for crack fault of air inlet casing support plate of engine
  • Acoustic diagnosis method and device for crack fault of air inlet casing support plate of engine

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application.

[0049] Aiming at the fault diagnosis of the fixed strut plate crack of the air intake casing of the aero-engine, this application proposes a crack fault acoustic diagnosis method and a fault diagnosis device, which can effectively, high-precision, and fast diagnose the fault of the intake casing strut plate crack identify.

[0050] During the endurance test of the aero-engine, due to the long-term operation of the intake casing under high-speed and high-load test conditions, fatigue cracks will occur on the support plate, which seriously affects the test safety and engine reliability. The acoustic signal is a signal that can reflect the state information of structural characteristics. When a crack occurs in ...

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Abstract

The invention provides a crack fault acoustic diagnosis method for an engine air inlet casing support plate. The method comprises the following steps: impacting an engine air inlet casing fixed support plate to generate an acoustic signal; the method comprises the following steps: acquiring a force signal for impacting an engine air inlet casing fixing support plate and an acoustic signal generated by the engine air inlet casing fixing support plate, and processing the force signal and the acoustic signal through a transfer function method to obtain an acoustic frequency response signal; and comparing the acoustic frequency response signal of the fixed support plate of the air inlet casing of the engine with an acoustic frequency response signal of the fixed support plate of the air inlet casing of the engine in a database, if a frequency difference value of first peak values of the two acoustic frequency response signals exceeds a threshold value, judging that the fixed support plate of the air inlet casing of the engine generates a crack, otherwise, judging that the fixed support plate of the air inlet casing of the engine does not generate the crack. Compared with a traditional fault diagnosis method, the crack fault acoustic diagnosis method is simpler and more efficient, and crack faults in the supporting plate and at the structural interface can be effectively recognized.

Description

technical field [0001] The present application belongs to the technical field of automatic control, and in particular relates to a method and device for online identification of characteristic parameters of gap links based on line segment fitting. Background technique [0002] As the main load-bearing and air intake component at the front end of the aero-engine, the air intake casing is used to rectify the incoming air flow to ensure that the air flow can meet the needs of the compressor, and to make the air flow with the minimum total pressure loss and the minimum Aerodynamic resistance flows through a curved flow path. The engine intake casing is faced with the problem of heavy load and light weight. At the same time, because the intake casing has been working under high pressure, high speed and various load conditions for a long time, it is very easy to generate corrosion and vibration, which leads to the fixing of the intake casing. Cracks occurred in the support plate,...

Claims

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Application Information

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IPC IPC(8): G01N29/04
CPCG01N29/045G01N2291/023G01N2291/0289
Inventor 许玮健杨明绥韩乐男张成凯王萌武卉王笛黄明明张东来
Owner AECC SHENYANG ENGINE RES INST
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