Tribological design of hydrodynamic sliding journal bearings - formulating new functional charts

Abstract

Purpose - This paper aims to introduce an innovative methodology for the determination of operational characteristics of journal bearings (j-bs) through using new type charts based upon a numerical solution of the Reynolds equation. Design/methodology/approach - The present paper proposes the mapping of the behaviour of a smooth, isothermal and hydrodynamic (j-b) as a first step towards a future representation of the behaviour of j-b's with limited length and high lubricating clearance with or without macro or micro topographic features operating under high loads, high temperatures and low linear velocities leading to conditions of mixed or boundary lubrication. Findings - The derived analytical relationships between dimensionless quantities lead to the development of high precision synthetic operational charts regarding sliding j-b of any given geometry and varying operational characteristics. Originality/value - By considering the iso-operational curves which are of a hook form relevant to comparative data becomes directly and rapidly clarified.