Food industry: Monitoring a fan imbalance - Case Study

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Courtesy of Wi-Care

Equipment, Context:

The Plant is located in Northern Europe, producing amino acids amongst other products. The site is operating 24/7 all year long. The fan (impeller) is supplying drying process with hot air. Fan is unique and doesn’t receive a deep prediction system or strategy. Fan bearing housing is equipped with a vibration sensor only working as an alarm trigger. Production team knows that the fan gets clogged powder from time to time creating a severe imbalance generating a vibration trigger and an unplanned shutdown of the system. I-Care is called to install Wi-care wireless vibration and temperature system in order to have a better understanding on how and when the fan is loaded by powder. Wi-care allows also a perfect trending of the vibration at 1XRM linked to the unbalance. With permanent monitoring and early detection Wi-care allows to plan a shutdown for fan cleaning before an emergency stop occur spontaneously.

Food trend

Analyst diagnosis and spectrum justification: Imbalance increase

We observe a vibration amplitude peak at the rotation frequency of the equipment mainly visible on the fan bearings. This peak is linked to the wheel imbalance. The vibrations amplitudes variates during the monitoring period (RPM almost constant 55-53 Hz). Trends show an increase of the unbalance between 05/11/2015 and 11/12/2015. The vibration increase is linked to powder attached on the wheel. This is to follow until the next stop maintenance (10 days) for cleaning.

food spectrum

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