quote:Originally posted by Prabhu:Dear All;In Frictional bearing ( Plain Bearing) supported High Tension Motors there is a possiblity to determine, set the centring of the rotor, which facilitates in Magnetic centring of the rotor at Running condition.Question 1?In case of Antifriction bearings supported HT Motors, Whether it is applicable ? If so How to determine the magnetic Centre of the rotor? whether it affects the life of the thrust bearing ( Normally Deep groove Brg) used in this application.Question 2 ?Whether a improperly centred rotor will induce high axial Vibration ?
quote:Originally posted by AKHTAR:No radial centering is required. Axial centering should be there during running condition. In HT motors with journal bearings, you will find a pointer near the motor inboard bearing which should be matched with a groove on the shaft during coupling with the driven equipment. If you do so, during running, motor will automatically get magnetic center. Normally, such motor have high axial float. so, during coupling this should be taken care of otherwise the motor rotor may move continuously back and forth during normal running.