Gear fault positioning system and method

A technology of fault location and positioning method, which is applied in the direction of machine gear/transmission mechanism testing, etc., can solve the problem of not being able to accurately determine the location of gear faults, and achieve the effects of easy grasp and use, accurate algorithms, and accurate positioning

Active Publication Date: 2015-11-25
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a gear fault location system and method to solve the problem that the gear fault location cannot be accurately determined under working conditions

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  • Gear fault positioning system and method
  • Gear fault positioning system and method
  • Gear fault positioning system and method

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Embodiment 1

[0042] Embodiment 1: as Figure 1-Figure 2 As shown, a gear fault location system and method include a signal acquisition module, a signal processing module, and a feature extraction module; the signal acquisition module is used to collect vibration signals and key-phase pulse signals from the faulty gearbox through an acceleration sensor and an eddy current sensor. The multi-channel synchronous sampling, the signal processing module uses the order ratio tracking technology to realize the conversion of the quasi-stationary signal in the angle domain, thereby eliminating the frequency ambiguity caused by the fluctuation of the speed and load, and completing the noise reduction of the gear fault vibration signal through the angle domain synchronous average As well as the elimination of random interference, the feature extraction module is used to perform narrow-band demodulation analysis based on frequency shift and spectral line editing on the averaged signal to determine the fa...

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Abstract

The invention relates to a gear fault positioning system and method, and belongs to the field of a fault diagnosis technology and a signal processing analysis technology. The gear fault positioning system comprises a signal acquisition module, a signal processing module and a feature extraction module. By use of an order tracking method, frequency fuzziness caused by a phenomenon can be effectively overcome, by use of an angle domain synchronization average technology, random interference components such as a bearing and the like in a gear case can be eliminated, and the purpose of noise reduction is achieved; by use of spectral line editing, the disadvantage of incapability of completely filtering unnecessary frequency components due to existence of a transition zone in a conventional band pass filter can be overcome, and accordingly, a frequency band of interest is accurately filtered; influences exerted by such external factors as noise, rotation speeds, load fluctuations and the like on a phase demodulation effect can be eliminated, abrupt change of signals after demodulation at gear fault positions is more obvious, and gear faults are quite accurately positioned; and the method is easy to master and use, the algorithm meets the real-time performance requirement of an industrial field, and through actual application tests, the algorithm is accurate and reliable.

Description

technical field [0001] The invention relates to a gear fault location system and method, and belongs to the technical field of fault diagnosis technology and signal processing and analysis. Background technique [0002] Gear is an important part of rotating machinery to transmit power, and at the same time, it is also one of the important research objects in mechanical fault diagnosis. Therefore, it is of great significance to carry out research on gear fault diagnosis technology to ensure the safe operation of equipment. As early as the 1980s, P.D.McFadden proposed to use the narrowband demodulation method to extract the amplitude and phase information of the synchronously averaged gear vibration signal, so as to realize the early diagnosis of gear local faults. Among them, the importance of phase demodulation is especially explained. However, with the deepening of research, people found that non-stationary signals carry rich fault feature information, while P.D. McFadden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02
Inventor 郭瑜刘倩楠伍星刘畅贺玮谢金葵
Owner KUNMING UNIV OF SCI & TECH
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