A Study on a Squeeze Film with a Compliant Plane under Periodic Motion

Abstract

A 2-dimensional periodic elastohydrodynamic squeeze film between a rigid plane and an elastomer of uniform thickness attached on a rigid substrate is theoretically analyzed. Time-dependent film shape and pressure distribution through each period are calculated about a 2-dimensional model, and an elastic periodic squeeze film with an incompressible lubricant is found to be able to keep hydrodynamic lubrication condition under positive load. It is explained about this new lubrication mechanism that the lubricant is pumped inside the film by periodic deformation of the wall just like flapping flight, and consequently average film pressure takes positive value. A squeeze thrust bearing with silicone rubber lubricated with mineral oil was vibrated with electric power under constant load and experimentally investigated. The changes in floating gap and film pressure were measured and the experimental result verified the theory on the whole.