Abstract:In classical theoretical analyses of EHL(elastohydrodynamic lubrication),the calculated film pressure always fulfills the condition of loading balance,while this procedure cannot be applied to EHL in confined gaps.When EHL occurs in a confined gap,the load capacity will change with working parameters.Full numerical analysis was carried out for line contact isothermal EHL with confined gaps,and variations of film thickness and pressure were discussed.It is found that with the increase of entrainment speeds and material parameters,the film thickness and pressure are increased.With the increase of gap parameter,the film thickness is increased,but pressure is decreased.From the numerical results,the film thickness equations were derived,and their calculation results have small errors with the simulation results.