Severe imbalance and structural looseness with a bearing fault (fluting).
Inconsistent operation of the Homogenizer C motor DE bearing, with heightened Peak Accel readings was identified. The main problems were increased vibration and indications of looseness, primarily at the non-drive end compounded with bearing fault frequencies associated with fluting.
A change in sensor position was performed to gather more accurate data. Following continued abnormal readings, the NDR bearing was replaced on August 5, with temporarily reduced the peak accel.
Additionally, adjustments to the pulley and belts were made and a soft foot check was conducted. A speed study suggested the opportunity to lower the operating frequency (Hz) of the motor. On August 18, variable frequency drive wiring was replaced due to fluting found in the recently replaced nondrive end bearing. Despite these measures, vibrations continued to rise. This prompted the recommendation to replace the entire motor with one equipped with ceramic bearings to mitigate electrical issues and better manage the operational demands.
