Fluid-Structure Coupling Analysis of Non-linear Reciprocating Piston Seals in Series

Abstract

Abstract The reciprocating piston seals are crucial parts in hydraulic system which are widely used in aerospace and military industry. A direct fluid-structure coupling method with high efficiency is proposed for solving the transient Elaso-Hydrodynamic-Lubrication (EHL) problem in hydropneumatic suspension reciprocating piston seal system. Detailed 3D fluid-structure coupling model is built using finite element discretization. Material tests are carried out to obtain the parameters of the 3rd-oder Ogden constitutive model of the rubber O-ring. The sealing performance and friction force of the sealing system are analyzed in different piston speed. The critical speed from mixed lubrication to full film lubrication is obtained.