Rahmani, Ramin
Shirvani, Ayoub
Shirvani, Hassan
Analytical analysis and optimisation of the Rayleigh step slider bearing
In tribology, the Rayleigh step is known as a bearing with the highest load capacity
amongst all other possible bearing geometries. In classical resources on tribology, it is
also shown that there is an optimum geometry for the Rayleigh step providing the highest
load capacity. However, the analyses are confined to a special case where the effect of
hydrostatic pressure is neglected. Furthermore, the possible optimum parameters in terms
of the friction force and/or friction coefficient as well as the lubricant flow rate have not
been discussed. In this study, the Rayleigh step is comprehensively analysed including
the effect of variations of pressure at the boundaries on the optimum parameters. In
addition, the bearing is also optimised considering lubricant flow rate, friction force and
friction coefficient. It is shown that the optimum bearing parameters are strictly
dependent on the variations of the pressure at the boundaries. It is also verified that the
optimum point(s) in terms of load capacity are not necessarily equal to the optimum
point(s) considering friction coefficient and/or lubricant flow rate even though if there is
no pressure difference between bearing endings.
Rayleigh step;Optimisation;Load capacity;Friction coefficient;Lubricant flow rate
2013-08-06
https://repository.lboro.ac.uk/articles/journal_contribution/Analytical_analysis_and_optimisation_of_the_Rayleigh_step_slider_bearing/9565979