凹坑形非光滑表面的优化设计及减摩性能分析  

Optimization design and anti-friction performance analysis of the pit-shaped non-smooth surface

作　　者：徐中[1] 杨文亮[1] 王兴镇 李桂磊 

机构地区：[1]大连理工大学机械工程学院,辽宁大连116023

出　　处：《哈尔滨工程大学学报》2013年第12期1605-1610,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51075052)

摘　　要：为了探讨凹坑形非光滑表面的形貌参数对于表面摩擦性能的影响,进一步证明自组装凹坑形非光滑表面的耐磨性能,利用Ansys热结构耦合的方法,对影响凹坑形仿生非光滑表面耐磨性的形貌参数及外加载荷条件进行了有限元仿真模拟,并利用能量损耗与能量守恒理论对等效摩擦系数进行了推导,通过等效摩擦系数的对比,最终确定出最优的形貌参数组合:凹坑直径为2μm,间距为4.5μm,涂层厚度为200μm,压力系数为1 000,速度为3 m/s时,凹坑形仿生非光滑涂层表面的减摩性能最佳.并且通过凹坑形仿生非光滑表面与光滑表面在相同外加条件下的耐磨性对比,验证了凹坑形仿生非光滑表面具有优异的减摩减阻性能,与未涂涂层的光滑表面相比其减阻率可达48.42%,与涂有具有相同热物理性能的光滑涂层表面相比,其减摩效率可提高15.57%.In order to investigate the influence of morphology parameters of a pit-shaped non-smooth surface on the surface frictional properties, and to further prove the abrasion resistance of a self-assembled pit-shaped non-smooth surface, the coupled thermal structural method in Ansys was used for the finite element simulation of various mor- phology parameters and applied load conditions that affect wear-resisting properties of the bionic non-smooth pit- shaped surface. The equivalent friction coefficient is derived using the energy loss and conservation theory, and by contrasting the equivalent friction coefficient, the optimal combination of morphology parameters is ultimately deter- mined, namely that the pit-shaped bionic non-smooth surface coating has the best anti-friction property when the pit diameter is 2 μm, the distance between pits is 4.5 μm, the coating thickness is 200 μm, the pressure coefficient is 1000 Pa/mm, and the sliding speed is 3 m/s. Comparing the wear resistance of the pit-shaped bionic non-smooth surface with the smooth surface in the same applied load conditions, the pit-shaped bionic non-smooth surface dem- onstrates excellent wear resistance and drag reduction performance; the drag reduction rate is up to 48.42% as com- pared with the smooth surface without the coating, and the friction reducing efficiency may increase 15.57% as compared with the smooth coating surface with the same thermo-physical properties.

关 键 词：凹坑形表面 仿生表面 非光滑表面 减摩 减阻 等效摩擦系数 形貌参数 

分 类 号：TH117.1[机械工程—机械设计及理论]