Vibration Analysis of the Boiler Supply Air Fan—A Case Study

The air supply fan is an important element for boiler operation, responsible for providing the necessary air flow with respect to the combustion process demands. Vibration measurements of the boiler fan were conducted on measurement points defined by standard ISO 10816-1. Vibration measurements were done with Bruel&Kjaer Vibrotest 60, vibration analyzer and offline data acquisition device. The measured parameters are related to: levels of vibrations, parameters of condition of bearing BCU (Bearing Conditions Unit) and BCS (Bearing Spectrum Conditions), analysis of the characteristic frequency of vibrations is presented on FFT Spectrum diagrams. Based on the analysis the main conclusion is: measured vibrations are high and fan is in the field of unstable work.