Vibration Reliability Evaluation of Main Fan Spindle Bearings

Based on an analysis of failure causes, the axial force is the main reason why spindle bearings vibrate abnormally and cause frequent failures of the main fans in mines. In this paper, the probability density function of the spindle bearing vibration was established through the bootstrap maximum ent...

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Bibliographic Details
Published in:Shock and vibration 2019, Vol.2019 (2019), p.1-12
Main Authors: Chen, Lihai, Ye, Liang, Qiu, Ming, Pang, Xiaoxu
Format: Article
Language:English
Subjects:
Algorithms
Ammunition
Analysis
Axial forces
Bayesian analysis
Bearing
Bearings
Coal mining
Coefficients
Confidence intervals
Distribution (Probability theory)
Empirical analysis
Failure
Failure analysis
Fault diagnosis
Lower bounds
Mathematical problems
Maximum entropy method
Mineral industry
Mining industry
Principal components analysis
Probability density functions
Reliability analysis
Reliability engineering
Vibration analysis
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Summary:Based on an analysis of failure causes, the axial force is the main reason why spindle bearings vibrate abnormally and cause frequent failures of the main fans in mines. In this paper, the probability density function of the spindle bearing vibration was established through the bootstrap maximum entropy method, the Lagrangian multiplier and the empirical coefficient were introduced, and models of the upper- and lower-bound functions of the probability density and the true value function of the failure probability were established. The true value function and interval estimation values of vibration reliability were obtained on the basis of maximum entropy. The analysis results showed that the estimation true values of vibration decreased with an increase in the empirical coefficient. When the empirical coefficient was less than 0.1, the estimated true value decreased sharply. When the empirical coefficient was greater than 0.1, the vibration value decreased linearly with the empirical coefficient. When the empirical coefficient was 0.1, the estimated true value was 0.85 mm/s2, which is consistent with the change in the actual vibration value. Therefore, when the main fan is fault predicted, the vibration value should be 0.85 mm/s2 as the basis for judgment and then the theoretical basis for the fault diagnosis of the spindle bearing are provided.
ISSN:1070-9622
1875-9203
DOI:10.1155/2019/8182530