Vibration in grease lubricated bearing systems

In this study a dynamic bearing apparatus is designed, developed and used t o evaluate noise and vibration of bearings lubricated with various greases under different operating conditions. Eight different greases are evaluated for their vibration and noise characteristics. The threshold kurtosis and mean square methods are used to quantify grease vibration and rank the grea ses based on their bearing vibration. The results indicate that ultra-filte red greases exhibit the lowest bearing vibration in the mid-frequency range amongst ail greases tested.