Continuously Monitored using Vibration & Ultrasound Analysis
This BF-9401 Area Pulling Fan plays an integral role in Greenfield Ethanol’s manufacturing process. It is a critical component to their Thermal Oxidizer Equipment. If this fan goes down, production is severely hindered, and possibly even stopped all together.
Vigilant System Permanent Install on Critical Fan Bearing
Understanding the Asset
The asset is a New York Blower with a 250hp motor that rotates 1780 rpm. The fan rotates at 1168 rpm 24/7, all day, every day. The fan shaft is mounted with two SKF 22232 bearings, they’re lubricated with oil.
The last time the fans bearings were replaced was October 22, 2012.
Vibration & Ultrasound Analysis, September 2022
Lead Vibration Analyst, Jonathan Dion takes routine vibration measurements on this plant’s critical equipment. Back in 2018, a defect was detected on the pulley side of the fan (SKF 22232). It has since been evolving. Using the acceleration envelope filter in Peakvue, it can be seen clearly.
Figure 1 – Envelope Spectrum (Peakvue)
The following ultrasound readings were taken on September 9, 2022, helping confirm the findings from the Vibration readings.
Figure 2 – Ultrasound Readings (UAS3)
Vibration & Ultrasound Analysis, November 2022, Vigilant System
With no plan to replace the bearings until the large-scale planned shutdown in September 2023, the best course of action decided by the reliability team was to install a Vigilant System to continuously monitor the condition of the fans bearings, and hopefully see the assets life extended until the planned shutdown.