Review of Lubricant Viscosity Impact on Vibration Response in Rolling Element Bearings

This review article critically examines the impact of lubricant viscosity on the vibration response of rolling element bearings, synthesizing findings from experimental and theoretical studies. Lubricant viscosity plays a pivotal role in determining the thickness and stability of the lubricant film, which in turn influences bearing damping, friction, and vibration characteristics. Higher viscosity lubricants generally enhance damping and reduce vibration amplitudes at low speeds, while at higher speeds, increased viscosity can elevate vibration energy. The review discusses the interplay between lubricant properties, operational conditions, and bearing dynamics, highlighting the importance of viscosity selection for optimal performance and reliability. Insights from vibration analysis techniques are also presented, emphasizing their role in monitoring bearing health and diagnosing lubrication-related issues.