TECO AEJE - Mechanical Noise and Vibration Troubleshooting

Teco Installation and Maintenance Manual
TEFC Squirrel Cage Induction Motors
Teco Electric and Machinery Company
Manual Number: IOM ~ TEFC Rev.01
47
Kind of Fault
Symptom
Cause
Remedy
Noise
Mechanical noise
caused by
machinery
Rubbing as a result
of ingress of
foreign matter
Clean motor
interior and
ventilation ducts
Wind noise
Noise induced by
air flowing through
ventilation ducts
Induced by
conveyance
machine
Repair machine
Vibration
Electro-magnetic
vibration
Short circuit of
windings
Repair
Open circuit of
rotor
Repair
Vibration
Unbalanced rotor
Repair
Unbalanced fan
Repair
Mechanical
vibration
Broken fan blade
Replace fan
Un-symmetrical
centres between
belt sheaf
Align central points
Central points of
couplings do not lie
on the same level
Adjust the central
points of couplings
on the same level
Improper mounting
installation
Lock the mounting
screw
Motor mounting
bed is not strong
Reinforce mounting
bed
Remarks:
i. Circuit switches: This includes knife switch, electromagnetic switch, fuse and
other connection switches etc.
ii. Starting switches: This includes Delta-Star starter, compensate starter,
reactance starter, resistor starter, starting controllers etc.