Seek advice on pump bearings
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I would like to ask: A standard centrifugal pump currently has three bearings – two angular contact bearings installed back to back, and one cylindrical roller bearing. Where are these three bearings installed? It would be better to have pictures... I’ve never seen the actual product in person. Also, do these three bearings use cylindrical roller bearings to bear radial loads, while the two angular contact bearings handle axial loads? What type of bearings are generally used in pump motors, and how many?
The cylindrical roller bearing at one end bears the radial load, while the back-to-back contact ball bearings at the other end bear both radial and axial forces
Based on your description, this is a double-supported pump such as the BB2 type, with cylindrical roller bearings on the drive side and back-to-back angular contact bearings on the non-drive side
For BB2-type pumps, the radial bearings are located near the motor drive end, while the angular contact bearings are situated at the non-drive end of the pump. From the owner’s description, it seems that either 1) the owner is not clear about the distribution of stress loads on the pump body during its operation, or 2) the owner does not fully understand the advantages, disadvantages, and functions of each type of bearing. It is recommended to read more relevant books.