Regarding the high vibration of the bearing housing of the flash bottom pump in the atmospheric and vacuum distillation unit
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My unit is a 10 million-ton atmospheric and vacuum distillation unit. The flash bottom pump operates in a 2-operational-1-backup configuration; a new pump head was recently installed, and after the replacement the vibration level of the pump’s bearing box was around 9. Despite adjusting the alignment and replacing the bearings and couplings several times, the vibration remains high. Experts, please help analyze it. Experts say there is stress
The pump bearing housing vibrates severely; 1. There is a problem with the shaft； 2. There is a problem with the bearing ； 3. There is a problem with the impeller lock nut ； 4. There is a problem with the inter-stage bushing ； 5. There is a problem with the coupling ； 6、There is a problem with the support under the pump head.
It’s also possible that there is a problem with the impeller balance
The bearing installation clearance in the bearing bracket is large, and uneven corrosion of the impeller leads to imbalance