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  • The computational model resiliently deformable radial bearing of finite length, running on a stratified lubricant

    The paper presents a method for forming exact self-similar solution of the problem of calculating the compliant hydrodynamic journal bearing of finite length, running on layered lubricant in the axial lubrication. On the basis of the equations of motion of a viscous incompressible fluid, continuity equation and Lame equations for the case of a "thin layer" found the velocity and pressure, analytical expressions for the components of the supporting forces, the forces of friction and resistance forces axial movement of the lubricant. The analytical expressions for the value of the lubricant in the axial direction. The estimation of the parameters characterizing the ratio of the viscous layer adapted profile and the deformation of the elastic layer on the basic performance of the bearing. Established the most rational of the bearing capacity, the force of friction and lubricant consumption values ​​of these parameters.

    Keywords: radial bearing, load bearing capacity, stratified flow

  • The method of calculating of the hydrodynamic thrust bearing with the dependence of the viscosity of lubricating fluid stratified temperature

    In this paper, based on the Navier-Stokes equations in the case of a "thin layer" is a method of forming an exact self-similar solution of the problem of calculating the hydrodynamic thrust bearing with the adapted profile of the supporting surface, running on a two-layer lubrication, c considering the viscosity of lubricating fluid temperature. Found the velocity and pressure in the lubricating layers and using the expression for the rate of energy dissipation analytical expressions for the viscosity of the lubricating layer. The estimation of the influence of parameters characterizing the adapted profile of the bearing surface of the bearing, and temperature parameters, viscous layers of relationships and their length on the basic performance of bearings operating on stratified lubricants. The optimal values ​​for these parameters to ensure the rational, for bearing capacity and strength of friction operation under consideration thrust bearing.

    Keywords: Adapted profile, stratified flow, load-bearing capacity, the friction force, the Couette flow

  • Triboelectric phenomena at metal-polymer friction contact and their dependence on temperature

    The research of triboelectrization of metal-polymeric contact has been conducted. It was based on the concept of surface states (SS), which represent energy levels on the surface and are the localization centers of the free charge carriers. Thus surface states on a metal are a boundary layer of a chemical compound formed by a metal with the atoms that are included into a composition of atmospheric gases or a polymer. Surface states on a polymer are connected with the fragments of polymeric molecules, appearing in the result of tribodestruction, by the radicals containing unpaired electrons. The investigation shows that a level of electrization of a composite polymer reduces if heteropolar polymers are brought together.

    Keywords: surface states, temperature, a value and a sign of tribocharge, reduction of electrization level