| 摘要: |
| 对限量供油条件下梳齿沟槽阵列表面的润滑特性及其集油性能进行了研究。 利用飞秒激光在摩擦表面制备了梳齿状沟槽阵列,形成了条状亲油区。 采用摩擦力及膜厚测量仪的往复运动模块对该条状自亲油区在限量供油条件下的润滑成膜特性和减摩降磨特性进行了研究。 同时,采用高速摄像机对梳齿沟槽阵列表面油滴的输运特性进行了观察。 结果表明,以梳齿状沟槽阵列为边界的润滑轨道对置于其上的润滑油有明显约束作用,限制其向润滑轨道之外的铺展。 在有限供油条件下,该类条状自集油表面具有较好的润滑能力、较小的摩擦因数和磨损。 相对于普通润滑表面, 集油表面摩擦因数减小了 30%左右,而往复运动行程中心位置最小膜厚增大了 20 nm。 油滴在梳齿沟槽阵列表面的输运产生明显差异,朝向润滑轨道的输运距离为远离润滑轨道输运距离的 1. 5 倍。 |
| 关键词: 梳齿沟槽 条状亲油区 限量供油 摩擦因数 油膜厚度 |
| DOI：10.11933/j.issn.1007-9289.20200323002 |
| 分类号:TH117.2 |
| 文章编号:1007-9289(2020)05-0040-07 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51775286, 51875299) |
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| Lubrication Characteristics of Oil Replenishment Surface with Comb-tooth-shaped Grooves |
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Liu Chenglong1,2, Guo Feng1, Huang Bailin1, Zhou Yi1, Li Xinming1
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1.School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266300 , China;2.Depart- ment of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077 , China
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| Abstract: |
| Lubrication characteristics of surface with comb-tooth-shaped grooves under limited lubricant supply were studied. A comb-tooth-shaped grooves was made by femtosecond laser, and a strip like oleophilic region was formed. Film formation and friction reduction under limited lubricant supply were studied by using reciprocating motion module of friction testing machine and film thickness measuring instrument. And the transportation characteristics of oil droplet on the surface with comb-tooth-shaped grooves were observed by high-speed camera. Test results show that the comb-tooth-shaped surface on both sides has obvious re- striction on the oil droplet, which limits the spread of lubricating oil out of the lubricating track. Under limited lubricant supply, the surface with oleophilic strip zone increases film formation and reduces friction coefficient and wear. The geometric gradient of the comb like surface enhances the ability of oil self-replenishment and the oil film thickness of the lubrication track. Compared to the normal lubricating surface, the bearing friction was reduced as 30%, and the lubricating film thickness at the center of re- ciprocating stroke increased as 20 nm. The transportation of oil droplets on the surface of the comb-tooth-shaped grooves was ob- viously varied, and the transport distance towards the lubrication track was 1. 5 times as that away from the lubrication track. |
| Key words: comb-tooth-shaped grooves strip like oleophilic region limited lubricant supply oil replenishment coefficient of friction film thickness |
