Analysis of Spherical Texture On Characteristics of Hydrodynamic Journal Beraing

Abstract

Texture produced on the surface of hydrodynamic journal bearing have certain changes in the coefficient of friction, load carrying capacity, wear rate, stiffness and damping of the two surfaces which are matting with each other. By creating texture or micro dimple on a hydrodynamic journal bearing, pressure increases and significant improvement has been achieved in its load carrying capacity, lubricant flow rate, coefficient of friction etc. In a present work numerical analysis has been carried out to determine the effect of using negative spherical surface texture on hydrodynamic journal bearing surface and it is compared with normal journal bearing i.e. journal bearing without texture. We can take any other profile also but spherical profile is easy to fabricate by laser technology or etching process. The Reynolds equation is solved numerically with the help of central finite difference method and analysis is done on the effect of texture height, asperity ratio and number of textures on the journal bearing. Here we also determine the behavior of parameters of hydrodynamic journal bearing (texture and without texture) with increase in eccentricity ratio. Texture journal bearing has a great importance in journal bearing because in vertical journal bearing initially it provides converging part which helps in increasing load carrying capacity which is not present in plain journal bearing. The author believes that such detail analysis of texture on journal bearing surface to study different tribological behavior under different condition will help researchers around the world.