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A gear fault location system and method

A fault location, fault location technology, applied in the direction of machine gear/transmission mechanism testing, etc., can solve the problem of inability to accurately determine the gear fault location, and achieve the effect of eliminating random interference and ensuring accuracy

Active Publication Date: 2018-02-09
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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  • A gear fault location system and method
  • A gear fault location system and method
  • A gear fault location system and method

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Embodiment 1

[0041] Embodiment 1: as Figure 1-2As 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 fault loca...

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Abstract

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. The invention includes a signal acquisition module, a signal processing module and a feature extraction module. The invention adopts the order ratio tracking method to effectively overcome the frequency ambiguity caused by this phenomenon, and uses the angular domain synchronous averaging technology to eliminate random interference components such as bearings in the gearbox to achieve the purpose of noise reduction; the use of spectral line editing can overcome the traditional band-pass filter Due to the existence of the transition band in the filter, it is impossible to completely filter out the unwanted frequency components, and then accurately filter out the frequency band of interest; it can eliminate the influence of external factors such as noise, speed, and load fluctuations on the phase demodulation effect, making the The mutation of the demodulated signal is more obvious at the position of the gear fault, so as to realize the positioning of the gear fault more accurately; this method is easy to master and use, and the algorithm meets the real-time performance requirements of the industrial field. After practical application testing, the algorithm is accurate ,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 Patents(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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