Effect of Cross-Sectional Profile of Circular Dimples on Hydrodynamic Lubrication Characteristics of Thrust Bearings

Abstract

The effects of three types of dimples with different internal structures on the fluid lubrication characteristics of thrust bearings were investigated. The load-carrying capacity and the frictional torque were measured. The measurements were performed with a fixed constant film thickness. The behaviours of cavitation bubbles occurred within the dimple were observed through the rotating glass plate. Three types of internal structures of dimples were tested: cylindrical, sphere and conical. The measurement results were simulated by the Reynolds equation. As the results, the load-carrying capacity increased as the rotational speed increased. The cylindrical internal structure built up the largest pressure at the trailing edge, and consequently the largest load-carrying capacity. The frictional torque also increased with increasing the rotational speed. However, the effect of the internal structure on the frictional torque was not significant.

Influence of Variable Depth Surface Texture on the Performance Behaviours of Sector Shape Pad Thrust Bearing

“…It can be noticed that a larger magnitude of peak pressure at mid-plane along the circumferential direction are obtained with pocketed pads. Similar type of findings is also reported in [5,34,35].…”

Numerical Investigation of Short Bearing Lubricated with Copper Oxide Nanolubricants

“…Many researchers have [1,19,[24][25][26], reported finite difference method (FDM) as suitable method for solving the two dimensional Reynolds equation because of its accuracy, simplicity and faster convergence. Therefore, FDM is adopted for numerical solution of Reynolds equation modified for couple stress flow of lubricant containing copper oxide nano particles.…”