Motor Vibration Causes Major Problems

Motor Vibration Causes Major Problems

Synopsis:

A large metal recycling customer had problems with motors, bearings and coupling failures on a large 600 HP recycling dust control fan.

Background:

An IBT customer had been having problems with one of their larger pieces of equipment, a 600 HP dust control fan. They requested IBT’s Industrial Maintenance Technologies (IMT) department analyze the machinery to see what the solution would be for their equipment failure problems.

Challenge:

In this case, the main challenge was to identify the problem, come up with a plan to fix it, and finish the repairs in just 2 days. The pressure was on for this repair; the short timeframe was due to the fact that there were only 3 days left of the company’s scheduled maintenance shutdown for the year.

Solution:

IMT inspected the unit and found that the motor base was inadequate and had cracks in the foundation, which caused the motor to vibrate excessively.

IMT contracted a local machine shop in which they use for fabrication projects to build a new base to specification on short notice. Then, IMT department performed the following:

  • Removed the old base
  • Installed a new base and grouted it into the concrete structure
  • Installed new spherical roller bearings on the fan unit
  • Installed a new gear coupling and precision laser-aligned the motor to the fan unit
  • Balanced the fan wheel
  • Completed a baseline vibration analysis on the unit

Results:

IMT had finished the job before the 2 day deadline so the customer was up and running without any unscheduled downtime. The fan unit is now running trouble-free.

For mechanical upgrades, emergency repairs, machine repairs and predictive maintenance services, contact the IBT Industrial Maintenance Technologies Division

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