We have had a requirement from a motor supplier (induction, 200kW range), about the need of inmobilising the rotor in longitudinal direction, to avoid brinelling problems in the bearings. This is to apply once the motor is mounted on the machinery we build.
We have had lots of motors transported before without that requirement without any problem, but we have had an incident with some motors recently, where some bearings were damaged.
Additionally, that specific case used ceramic bearings (ceramic rollers), that is a relatively new solution for us, recomended to get a better behaviour with VF drives in terms of bearing life.
The task of inmovilising is not so easy, due to access constraits etc. so it is a problem for us.
My question goes about:
- Anybody knows if it has any relation the fact of using ceramic bearings to the risk of "false brinelling"?
- makes sense the requirement of rotor locking in long. direction for any type of bearings, if our experience says that is not? (for regular steel bearings I mean)
False Brinelling link
Thanks for reading