Abstract
The paper deals with the analysis of causes of excessive vibration of one of the two fans that in the steelworks provide exhaustion of vapor and residues produced during melting of steel scrap. During operation, the excessive vibration of the problematic fan led to the initiation of cracks in the concrete foundation and the repeated damage to the bearings. Under such circumstances, long-time operation could cause further significant damages or collapse of the whole equipment. The solution of the given task required to apply a complex approach, including experimental and numerical modal analysis of the fan’s rotating wheel as well as a series of operational measurements to assess the actual technical condition of the problematic fan and determine possible damages. The output is a series of measures developed to ensure safe and long-time operation of the fan.
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