表面技术2025，Vol.54Issue(17)：58-66,9.DOI:10.16490/j.cnki.issn.1001-3660.2025.17.005
具有固液复合润滑单元的织构表面摩擦学性能研究
Tribological Properties of Textured Surfaces with Solid-Liquid Composite Lubrication Units
摘要
Abstract
Equipment running under extreme conditions often has a phenomenon of oil starvation,which often causes serious part wear and even equipment failure.In order to improve the tribological properties of the material surface,the work aims to explore the anti-friction lubrication method of the textured surface under the condition of oil starvation.To improve this situation,a textured surface with solid-liquid composite lubrication units was designed and prepared.A circular micro-pit texture was prepared on the surface of 45# steel by laser marking machine and filled with polyimide(PI)foam,castor oil and polytetrafluoroethylene(PTFE)blocks.The ball-disk reciprocating friction and wear test was carried out and the tribological properties of three surfaces were compared under oil starvation conditions,including the textured surface with solid-liquid composite lubrication units,the pit filled oil textured surface,and the pit filled PTFE textured surface.The wear surfaces and cross sections of wear scars were analyzed with scanning electron microscopy and confocal microscopy.High-speed photography was employed to observe the lubrication mechanisms of the three surfaces.The experimental results indicated that the textured surface with solid-liquid composite lubrication units exhibited excellent anti-friction lubrication properties.Compared to the pit filled oil textured surface and the pit filled PTFE textured surface,the textured surface with solid-liquid composite lubrication units showed a reduction in the coefficient of friction by 54.5％and 41.7％,respectively,and the wear amount was reduced by 83.5％and 58.9％,respectively.Additionally,the PTFE blocks within the solid-liquid composite lubrication unit demonstrated lower wear rates.It was found by high-speed photography that lubricating oil and PTFE powder could be brought out to the surface of the friction pair during the friction process between the counterpart ball and the solid-liquid composite lubrication unit.The PTFE blocks within the composite lubrication unit surface were arranged in an assembly manner,allowing axial movement along the recesses.High-speed photography showed two peculiarities.The first one was that there was no direct hard contact between the PTFE block and the counterpart ball and instead,a small displacement occurred when they contacted,avoiding hard impact on the PTFE block by the counterpart ball.This showed that an elastic contact behavior was formed between the PTFE block and the counterpart ball.The other one was that when the PTFE block contacted the counterpart ball,the PTFE block moved down along the recess and squeezed the oil-containing foam in the recess.The lubricating oil stored in the squeezed PI foam overflew from the central hole of the PTFE block to the surface of the PTFE block,and then was brought into the surface of the friction pair through the contact zone of the counterpart ball,providing lubricating oil for the surface the friction pair,thus achieving the effect of liquid lubrication.The above-mentioned oil supply behavior of the oil-containing PI foam under the micro-sezing of the PTFE block was named as micro-squeezing oil supply.In conclusion,the lubrication mechanism of the textured surface with solid-liquid composite lubrication units is that the lubricating oil and PTFE powder brought out by friction have the effect of solid-liquid composite lubrication.The innovation point is micro-extrusion oil supply and elastic contact characteristics,which enhances the utilization of lubricating oil within the unit,reduces PTFE wear,and enables both liquid and solid lubrication on the textured surface.The textured surface with solid-liquid composite lubrication units has lower friction coefficient and surface wear.关键词
乏油/织构/磨损/固液复合润滑/润滑机理Key words
oil starvation/texture/wear/solid-liquid composite lubrication/lubrication mechanism分类
矿业与冶金引用本文复制引用
汤维冬,于爱兵,郭旭峰,秦拓,叶家往,叶玮豪..具有固液复合润滑单元的织构表面摩擦学性能研究[J].表面技术,2025,54(17):58-66,9.基金项目
国家自然科学基金(51875294)National Natural Science Foundation of China(51875294) （51875294）
