Abstract
Analysis and prediction of vibrations of ball bearings contaminated by open pit coal mine debris particles
Highlights
Nowadays power industry worldwide is mainly based on fossil fuel processing and exploitation
Taking into account that there are over 80000 conveyor idlers per standard open pit coal mine, it is clear that any Tehnički vjesnik 24, 6(2017), 1941-1950 improvement of its reliability leads to the significant improvement of power production systems overall performances
Despite the fact that chemical structure and origin of the contamination particles causing the failure of the rolling bearings from conveyor idlers on open pit coal mines were experimentally determined they have to be normalised to be used as an artificial contaminant regarding their size so it is adopted that their size could not be larger than 120 μm which is achieved by sieving with appropriate mechanical screens
Summary
Nowadays power industry worldwide is mainly based on fossil fuel processing and exploitation. Analysis and prediction of vibrations of ball bearings contaminated by open pit coal mine debris particles bearing lubricating conditions, lubricant contamination level, operating temperature and fitting stresses: Lnm = a1 × aISO × L10 ,. Despite numerous performed experiments and analysis there are still no mathematical models for contaminated bearings vibrations prediction Solving this problem is the main goal of research presented in this paper: to establish a correlation between bearings vibrations characteristics change in time and concentration level of contamination particles in the grease of the bearings. Thorough analysis of real open coal mine debris particles was performed in order to find out the structure and origin of contaminant particles which cause the failure of rolling bearings in above mentioned working environment
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