Design model of double-layer porous finite-length bearing with regard to anisotropy of porous layers and nonlinear factors

The asymptotic solution to the problem on the hydrodynamic calculation of the porous double-layer radial finite-length bearing is provided on the eccentricity ratio levels. The solution is based on full nonlinear Navier-Stokes equations, and on Darcy’s equation. The distinction of the suggested design model is that it allows for the permeability anisotropy of the porous layers, and availability of a greasing source. A case when greasing forcibly gets through pores of an external porous layer is considered. A velocity and pressure field in the lubricant and porous layers is found. As a result, analytical expressions for the main performance data of the bearing are obtained. The effect of the permeability anisotropy of porous layers, nonlinear factors, as well as the influence of a greasing source on the basic performance characteristics of the bearing are evaluated.