Resonance Problem at a Kiln Hood Fan
A kiln hood fan in Queensland, Australia, was analyzed high vibration levels at 60% of running speed due to resonance. It is recommended to avoid operating the fan in the 1080 - 1099 RPM range.
Kiln Hood Fan Vibration By MDI Australia
Introduction
In this case study, Machinery Diagnostics Institute (MDI) was commissioned to address a high vibration issue on a kiln hood fan at a construction plant located in Queensland, Australia. Effective vibration analysis plays a crucial role in identifying such issues before they lead to further damage or unplanned downtime.
Analysis
MDI utilized the following condition monitoring solutions to analyze the kiln hood fan and determine the root cause of its elevated vibrations:
Comments and Recommendations
The fan shows acceptable vibration levels according to the ISO 20816-3 Standard at 80% of running speed (approximately 1451 RPM). However, at 60% of the running speed (around 1080 - 1099 RPM), the vibration levels were relatively high. This is due to the fan operating near the natural frequency of the machine base, causing resonance. To avoid resonance issues, it is recommended to avoid running the fan in the 1080 - 1099 RPM range.
Additional Images
