Root cause analysis of bowlmill pinion shaft failures

This article describes in detail the approach and root cause for failure of pinion shafts used in bowl mills of thermal power plants. This analysis clearly indicated that ceasing of the movement of the bowl mill segment all of a sudden due to hard rocky lumps was the main cause for failure.

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ation in mill capacity fuel quality and mill inlet airflow rates that must be considered when sizing the pulverizer throat flow area. The vertically flowing air must be of sufficient velocity to suspend the granular coal bed in the grinding zone. Some designs use mechanical means to keep the coal above the underbowl pyrite sec

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Root cause analysis of bowlmill pinion shaft failures

Root cause analysis of bowlmill pinion shaft failures Article (PDF Available) in Case Studies in Engineering Failure Analysis 1(2):103–109 183 April 2013 with 370 Reads DOI: 10.1016/j.csefa.2013

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Failure analysis of coal pulverizer mill shaft. The fatigue cracks originated from the top edge of the keyway area where the bowl is assembled. Operating conditions material of the shaft and

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