Reason analysis and treatment measures for high bearing temperature

     This paper analyzes several reasons for the high bearing temperature of boiler rotating equipment in thermal power plants, and proposes corresponding preventive measures. High bearing temperature is a common and harmful fault of rotating equipment, which will reduce the service life of the bearing and increase the maintenance cost. When the temperature rises faster and the temperature exceeds the standard, it will easily lead to unplanned outage or reduced load operation. The economic benefits have a great impact. Therefore, it is the guarantee for the continuous and safe operation of the equipment to quickly determine the cause of the fault and take appropriate measures to solve it.

1 Common causes of excessive bearing temperature

1) Poor lubrication, such as insufficient lubrication or excessive lubrication, the quality of the lubricant does not meet the requirements, deterioration or debris;
2) insufficient cooling, such as blockage of the pipeline, improper selection of the cooler, and poor cooling effect;
3) Abnormal bearing, such as bearing damage, poor bearing assembly process, gap adjustment of each part of bearing housing does not meet the requirements;
4) The vibration is large. If the coordinating process of the coupling does not meet the requirements, the rotor has dynamic and static imbalance, the basic rigidity is poor, the ground is weak, the rotation stalls and the surge.

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