长方形微织构多参数耦合对油膜性能的影响

Effect of Multi-Parameter Coupling of Rectangular Micro-Texture on Oil Film Properties

表面微织构在摩擦润滑方面具有优秀的性能表现,被广泛应用于轴承润滑、刀具减阻等领域。目前国内外研究主要集中在单因素对有摩擦能的影响,对多因素耦合作用的分析较少。针对表面微织构单因素以及多参数耦合对油膜润滑性能的影响,采用ansys软件建立流体仿真模型。利用响应曲面法对影响油膜性能的微织构间距、深度以及宽长比等主要参数进行优化设计。研究发现,微织构单因素以及多参数耦合影响主要源于流体动压效应、空化效应以及涡流的产生。采用回归方程进行参数优化的结果,相较于无织构油膜表面压力提升83.7%,摩擦系数降低48.8%。

Surface micro-texture has excellent performance performance in friction lubrication,and is widely used in bearing lubrication,tool drag reduction and other fields.At present,domestic and foreign research mainly focuses on the influence of single factors on frictional energy,and the analysis of the coupling effect of multiple factors is less.A fluid simulation model was developed using ANSYS software to study the effect of single factors and multi-parame⁃ter coupling on the lubrication performance of oil film.The response surface method was used to optimize the design of the main parameters affecting the performance of the oil film,such as micro-texture spacing,depth and aspect ratio.It was found that the single-factor as well as multi-parameter coupling effects of micro-texture mainly originate from the fluid dynamic pressure effect,cavitation effect and vortex generation.The results of parameter optimization using re⁃gression equations show an 83.7%increase in surface pressure and a 48.8%decrease in friction coefficient compared to non-textured oil films.