Performance behaviour of double layer conical porous hybrid journal bearing operated with pseudoplastic lubricant

Abstract

This study performs a numerical simulation of a double layer conical porous hybrid journal bearing (DLCPB) by considering the synergistic effects of a double layer porous matrix and pseudoplastic lubricant behaviour. The non-Newtonian behaviour of the lubricant has been studied using the pseudoplastic lubricant behaviour in order to generate more realistic design data. Besides this, the synergistic effects of double layer porous matrix and non-Newtonian lubricant behaviour have been numerically studied. Further, porous journal bearings with a single layer of porous matrix demonstrate reduced stability and load capacity due to lubricant seepage through the bearing wall. Several researchers advocated the use of double layer porous journal bearings (DLPB) instead of single layer porous journal bearings (SLPB) to overcome this issue. This study examines the performance of a DLCPB with respect to the interactive effects of the flow behaviour index, semi cone angle, and permeability parameter. To solve the modified Reynolds equation for a DLCPB, the finite element approach is used. The results of this study suggest that the DLCPB enhances the performance characteristics in comparison to the single layer conical porous hybrid journal bearing (SLCPB). In addition, the stability threshold speed margin [Formula: see text] is enhanced by the application of a pseudoplastic lubricant.