Method and system for visualizing faults of fixed-axis gearboxes

Abstract

The invention provides a method and system for visualizing the fault of a fixed-axis gearbox, and proposes a new feature that only appears in a fault state; wherein, the meshing resonance area in the MRgram of a healthy gearbox will be concentrated in a wider frequency band. , and the appearance of the local fault will lead to another high-frequency meshing resonance region in the MRgram. This new meshing resonance region will be used as a new feature to identify the local fault of the gear, because the meshing resonance region only appears in the fault state. , so it can be used as a new and more intuitive and accurate new feature of gear local fault to identify the local fault of the gearbox, so as to compare the MRgram of the original signal with the MRgram of the health signal, and identify a new MRgram of the original signal. The high frequency band meshes with the resonance region, which can realize more intuitive and more reliable fault diagnosis of fixed-axis gearboxes.

Description

technical field [0001] The invention relates to the technical field of signal processing, and more particularly, to a method and system for visualizing faults of fixed-axis gearboxes. Background technique [0002] When there is a local fault in the fixed-axis gearbox, the corresponding meshing stiffness will also change periodically. The frequency that appears repeatedly on the frequency spectrum is the rotational frequency of the gear with the local fault, so this frequency can be regarded as the characteristic of the gear fault. frequency, and this fault signature is modulated by the meshing frequency and its harmonics and appears as sidebands in the frequency spectrum. [0003] In fact, an increase in the number and magnitude of sidebands near the meshing frequency and its harmonics is indicative of a fault condition, so compare the fault with the meshing frequency and its harmonic sidebands in the healthy state to identify fixed-shaft gearbox faults , is one of the wide...

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Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a fixed-axis gearbox fault visualization method to overcome the problem of comparing the fault with the meshing frequency and its harmonic sidebands in the healthy state to identify the fault of the fixed-axis gearbox. Gear fault diagnosis strategy, but this method is not intuitive enough, and the problem of accurate local fault diagnosis cannot be guaranteed only by judging the increase in the amplitude and number of fault characteristic sidebands

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