High temperature of the thrust bearing in the centrifugal pump
Thread Content
The temperature of the thrust bearings is now stable at 80 degrees; the temperature of the upper bearing is 80 degrees while that of the lower bearing is 70 degrees. The temperature neither drops nor rises – could it be a problem with the amount of oil used? Or other reasons. The bearing installation is fine, and the end caps have also been torqued properly.
Excessive oil addition can lead to high temperatures, but is there a problem with the quality of the lubricating oil? Is the installation clearance too small?
Is it lipid lubrication? It seems there’s too much grease.
How is the oil supply for the bearings provided, and is the type of lubricating oil specified by the manufacturer?
Your description is too simple. A cantilever single-stage centrifugal pump? Is the vibration normal? Mounting clearance for thrust bearings? What is the thrust clearance? Lubricated with lubricating oil? Lubricant quality? The temperature is too high; carefully check to find the cause
It is recommended to provide vibration indicators to check whether the issue is caused by misalignment. Furthermore, what type of thrust bearing? For example, if the clearance is not adjusted properly during installation, problems such as vibration and an increase in temperature may occur.
Too much grease was used, or there is a small gap after installation.
How many temperature probes do you have? Two? Is the thermocouple embedded or inserted?
Is the impeller original? Are the balance holes on it unobstructed? Are there any signs of corrosion or wear on the blades of the auxiliary impeller? And is the decompression unit functioning properly? Check these aspects
The temperature is neither rising nor falling; the bearing should be fine. Common empirical formula for bearing temperature: Bearing temperature = Ambient temperature + 40 degrees. Temperatures within this range are generally reasonable. As long as the temperature doesn’t rise anymore.
Oils are good. What does installation clearance refer to?