Considerations of coupling selection, installation and alignment: effects on motor mechanical performance

70% to 80% of motor field problems are mechanical in nature. A significant proportion of these mechanical problems can be attributed to bearing problems which arise when external loads are exerted on bearings not designed to accommodate any extraneous loading. When a motor is intended to be used in...

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Bibliographic Details
Published inConference Record of 1996 Annual Pulp and Paper Industry Technical Conference pp. 122 - 131
Main Author Hodowanec, M.M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1996
Subjects
Automation
Compressors
Couplings
Friction
Machinery
Magnetic forces
Oils
Protection
Rotors
Vibrations
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Summary:70% to 80% of motor field problems are mechanical in nature. A significant proportion of these mechanical problems can be attributed to bearing problems which arise when external loads are exerted on bearings not designed to accommodate any extraneous loading. When a motor is intended to be used in a direct connected mode, it is assumed that the only loads which the motor bearings have to support are the motor's rotor weight, one-half the coupling weight, and possibly some internally unbalanced magnetic forces. Unfortunately, if misaligned, it is possible for the couplings to exert a sustained combination of axial, radial, angular load on the motor bearings, with a subsequent reduction in motor bearing life, or in extreme cases, failure.
ISBN:9780780331488
0780331486
ISSN:0190-2172
DOI:10.1109/PAPCON.1996.535989