Method of fault diagnosis on ball socketed bearing of steel-making converter by comprehensive analysis

Abstract

The invention discloses a method of fault diagnosis on a ball socketed bearing of a steel-making converter by comprehensive analysis. The method carries out fault diagnosis on the ball socketed bearing of the steel-making converter by using vibration signal analysis and grease oil analysis. The method comprises the following steps of: firstly, selecting evenly distributed measuring points on the periphery of the outer ring of the bearing, and then punching bearing seats at the measuring points; carrying out resonance demodulation and wavelet noise reduction analysis on acquired bearing vibration signals; firstly, selecting centre frequency and bandwidth according to frequency bands generated in resonance peaks in a frequency spectrogram to carry out bandpass filtering, and then carrying out wavelet noise reduction and Hilbert demodulation treatment on the filtered signals; on the basis of detecting the conventional typical properties, carrying out qualitative and quantitative analysison the components and the content of metal wearers in oil samples by using spectrum analysis and ferrographic analysis, and judging according to the detection result; and comparing and synthesizing two analysis results to make a fault diagnosis report. The invention can effectively increase the accuracy of fault diagnosis, thereby being beneficial to discovering fault hidden troubles as early as possible and avoiding major accidents happening.

Description

technical field [0001] The invention relates to a bearing fault diagnosis method, in particular to a fault diagnosis method for a steelmaking converter trunnion bearing by comprehensively utilizing vibration signal analysis and oil (grease) analysis. Background technique [0002] As a large-scale low-speed and heavy-duty equipment, the steelmaking converter is the key equipment in the production process of modern iron and steel enterprises. The main characteristics of this type of equipment are low operating speed and heavy load. Due to low-speed operation, complex and changeable load, long-term operation of the equipment, coupled with the harsh production environment and poor lubrication, the equipment is prone to failure. Once this kind of equipment breaks down suddenly, it will cause the interruption of production, and even cause casualties in severe cases. The complexity of the equipment structure makes maintenance very difficult and the maintenance cost is high, causin...

AI Technical Summary

Problems solved by technology

However, compared with the real-time collection and analysis of vibration signals, the method of regularly extracting oil (grease) for analysis has limitations in timely detection of equipment failures

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