Modeling impact of grease mechanical ageing on bleed and permeability in rolling bearings

The evolution of the film thickness in a grease lubricated rolling bearings is given by continuous process loss and replenishment oil track. It believed that long run, maintained bleeding from reservoirs. capabilities thus have an impact on and/or bearing life. ability to bleed changes during operation due mechanical ageing, which affects fiber structure grease. In this study lubricating considered as porous medium formed thickener base oil. behavior polyurea was explored function degradation numerous full tests. measured interpreted matrix permeability based Darcy’s law. A ageing master curve built describe change ageing.