An optimal method of distribution of the slip zone on thrust bearing surfaces

Abstract

Research to achieve a reasonable distribution of the slip zone of the sliding pair for better improvement of the hydrodynamic pressure of the liquid film is an intractable topic. To solve this issue, this paper takes the thrust bearing as the research object, and proposes to use the position number of the grid nodes at the boundary line between the slip and no-slip zone in each radial zone of the inclined pad to be variables. The variables are then defined as chromosomes in an adaptive genetic algorithm (AGA) and used to optimize the bearing capacity of the tilting pad. The results show that the optimal method of the AGA, which has good stability and repeatability, remarkably improves the distribution of the slip zone on the surface of the inclined pad. Therefore, the bearing capacity of the liquid film is significantly improved. Particularly, by using the optimization, the boundary line between the slip/no-slip zone is a composite form of a part of an arc and a part of the whisker. When the liquid flow through the heterogeneous slip/on-slip surfaces is used by this composite splicing method, the liquid pressure is upgraded in two steps. This is more conducive to increasing the pressure on multiple areas on the surface of the tilting pad, thereby achieving higher bearing capacity.

Effect of sliding speed on the thermohydrodynamic performance of partially slip‐textured slider bearings

“…The model has proved to be quite effective in estimating the value of slip velocity. [33][34][35][36][37][38][39][40][41][42] In the present work, the value of dimensionless slip length constant (B 2 ) at the slip region on the bearing surface is taken as 0.2, which is generally applied to some non-wettable polymer materials. 49 The equation for the Navier slip length model can be written as 34 :…”

“…32 Since then, numerous studies have been reported using the updated Reynolds equation to investigate the performance of slider bearings. [33][34][35][36][37][38][39][40][41][42] The point outside the solid-liquid interface where the fluid velocity extrapolates to zero is known as the slip length. This non-dimensional constant is generally used to define the slip condition.…”