Centrifugal pump bearing burned out
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This post was last edited by Catalyzing a Grain on 2018-5-2 11:09, a few days ago. A horizontal centrifugal pump started to smoke suddenly at the bearing near the motor side after 65 days of operation, prompting an immediate shutdown of the pump on site. During the inspection, it was found that the oil seal was also in good condition. The inspectors reported that the oil level was also normal. I would like to ask those of you who have information on the oil level
Reasons for bearing failure in centrifugal pumps include the level of installation of the pump, axis alignment, loose anchor bolts, the quality of the bearings, and the quality specifications of the lubricating oil (grease). Look for the reasons from these aspects.
Why does such a thing happen?
This post was last edited by I believe LEE on 2018-4-26 09:47. There is a lack of oil, and inspection personnel might lie to avoid being punished; this assumes that the bearings on the drive side are the same size as those on the non-drive side. However, in many cases the bearings on the drive side are smaller than those on the non-drive side, so this assumption cannot hold； The bearing has been in a state of fatigue damage for a long time; check the inspection records to see if there are any records of abnormal noises ； The inner ring of the bearing is wearing out ； Bearing runs on the outer circle ； Quality issues with the bearings themselves.
Is there a false oil level, and what is the form of the oil level gauge?
When the bearing was removed, half of the balls were damaged. We also checked the oil level this morning and found that there was no lack of oil. I’m not sure what to think right now; if the bearing starts smoking, is it definitely because there’s no oil? Could there be no other reasons?
It is also possible that impurities got stuck during the operation of the bearing, damaging the balls and causing them to wear out rapidly; as a result, performance deteriorates and smoking occurs
Smoking does not necessarily mean a lack of oil; it occurs when the bearing conditions are poor and this leads to an excessively high temperature of the lubricating oil……
If metal flaking occurs on the rolling elements and this causes the bearing to get stuck, the bearing can also be damaged; such a situation is unpredictable.
There are many reasons for this. First, check the oil; by determining how much oil comes out during disassembly, it is possible to determine whether there is a lack of oil. On the motor side, it is usually a thrust bearing, and the clearance was adjusted at the time of installation. I’ve also encountered a situation before where a new pump started smoking as well. It was found that after the bearing housing was machined, the iron shavings inside were not removed properly; during operation, these shavings got into the bearings, which caused the pump to start smoking