Coal Engineering ›› 2025, Vol. 57 ›› Issue (4): 123-130.doi: 10. 11799/ ce202504018

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Fault diagnosis of belt conveyor gear box based on vibration signal

  

  • Received:2024-04-03 Revised:2024-09-11 Online:2025-04-10 Published:2025-05-28
  • Contact: Jing Hu E-mail:a1362509809@163.com

Abstract:

In the realm of coal mining, the belt conveyor emerges as a pivotal mechanized equipment, playing a crucial role in the transportation of coal. Its operational integrity is instrumental in maintaining both the production efficacy and safety standards of coal mining activities. The gearbox, a core component in the belt conveyor system, significantly influences the conveyor's reliability and overall operational performance. Any malfunction within this apparatus during coal mining can lead to substantial disruptions, potentially incurring severe economic setbacks and jeopardizing worker safety. Thus, the formulation of a sophisticated fault diagnosis model for the belt conveyor gearbox, predicated on vibration signal analysis, is imperative. This study focuses on the vibration signals emitted by the belt conveyor as a basis for investigation. It delves into the identification of characteristic fault types, employing variational mode decomposition enhanced by kurtosis-permutation entropy evaluation for signal denoising. A novel diagnostic approach is proposed through the development of a fault diagnosis model based on the Least Square Support Vector Machine (LSSVM), incorporating an optimization of normalized and kernel parameters via an advanced particle swarm optimization algorithm. The efficacy of this model is evidenced by its diagnostic accuracy rate surpassing 95%, a significant improvement of at least 6% over conventional diagnostic methodologies. This leap in diagnostic precision not only facilitates swift and efficient fault rectification but also elevates the reliability of belt conveyor operations, thereby safeguarding the integrity of coal mine production processes.

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