Study on Anti-Scuffing Load-Bearing Thermoelastic Lubricating Properties of Meshing Gears With Contact Interface Micro-Texture Morphology

Abstract

In the process of gear meshing, it is an inevitable trend to encounter failure cases such as contact friction thermal behavior and interface thermoelastic scuffing wear. As one of the cores influencing factors, the gear meshing contact interface micro-texture (CIMT) morphology significantly restricts the gear transmission system (GTS) dynamic characteristics. This subject intends to the contact characteristic model and interface friction dynamics coupling model of meshing gear pair with different CIMT morphologies. Considering the influence of gear meshing CIMT on the distribution type of hydrodynamic lubricating oil film, contact viscous damping, and frictional thermal load, the aforementioned models have involved time-varying meshing stiffness and static transmission error. Based on the proposed models, an example verification of meshed gear pair (MGP) is analyzed to reveal the influence of CIMT on the dynamic characteristics of GTS under a variety of micro-texture configurations and input branch power and rated speed/shaft torque conditions. Numerical simulation results indicate that the influence of CIMT on gear dynamic response (including meshing interface frictional thermal load, malicious damping, and impact vibration in the off-line direction of the action) is extremely restricted by the transient contact regularity of the meshing gear surface. Meshing gears dynamic characteristics (especially vibration and noise) can be obviously and effectively adjusted by setting a regular MGP with CIMT morphology instead of random gear surfaces.