Bearing overheating issue in multi-stage centrifugal pumps
Thread Content
One of the multi-stage centrifugal pumps in our factory uses an axial force balance drum for balancing; the non-driving end is equipped with two sets of back-to-back thrust bearings. The temperature of these thrust bearings can reach over 80 degrees. I’m not sure what could be the reasons for this, and I hope everyone can help analyze it
Reasoning for two sets of bearing model 7309
The reasons are: 1. The installation accuracy of the thrust disc does not meet the requirements of the pump manufacturer; the gap is too small； 2. The balance flow rate in the balance tube has not been calculated properly; increase the size of the return hole accordingly to reduce the axial force
There is no thrust disc, only a balance drum
The bearing preload is incorrect; there are issues with the installation
How long does it take for the pump to reach 80 degrees when in operation, and does the temperature remain constant without any tendency to drop?
Heat generation in thrust bearings is always caused by bearing misalignment. In this state, the turning is quite tight. Adjust the bearing housing.