Industrial fan vibration signature characterization



Technique for measuring and reducing industrial fan vibration and noise is detailed.  A method used to characterize the vibration signature for 100% industrial fan systems shipped is described.  A fan system consists of motor, propeller and cage.  We measure triax accelerometer vibration, microphone (both sound pressure level in dBA and raw signal in Pa) along with the current of three phase power for each fan shipped.  Comparisons are done immediately with the ISO 14694:2003 standard and troubleshooting and design changes are implemented if vibration limits are exceeded.  The method and results are provided for several cases.  Troubleshooting and best practices are described for various designs.  A portable system takes measurements in the field which are compared to the factory baseline characterization in real time to solve installation problems.