Research on the meshing load-bearing characteristics of the micro-textured thermoelastic hydrodynamic lubrication interface for a warship PRTS

Abstract. Gears are subjected to external excitation from alternating loads, and the micro-textured meshing interface (MTMI) will share larger contact stresses during the warship power rear transmission system (PRTS) torsional process. The current elastoplastic interface load-bearing contact model ignores the time-dependent changes in the textured element micro-convex peak (MCP) base diameter, which is usually regarded as a certain constant value, and which is extremely inconsistent with the time-varying characteristics of the MCP matrix diameter of actual MTMI, leading to deviation of the load-bearing analytical values determined by the current contact model from actual data. A generalised thermoelastic hydrodynamic lubrication (TEHL) contact load-bearing model with interface micro-texture (IMT) is proposed, where the contact area between all MCPs across the MTMI is represented by the equivalent scale factor parameter and the shape distribution density function is modified to ensure that the MCP is solved integrally. A mathematical model of meshing anti-scuffing load-bearing capacity (ASLBC) in a TEHL steady state is derived to reveal the correlation between contact stiffness and damping of the meshing MTMI under the influence of alternating loads, which provides a theoretical basis and data reference for homogeneous interface enriched lubrication (IEL) effect improvement and meshing ASLBC enhancement of the contact IMT for the PRTS.