Abstract：By using a Q switched light pumped Nd: YAG laser and the laser processing technology called “single pulse at a time, repeated at intervals”, the regular network of micro dimples were textured on one of the seal end face. The tribological properties of laser surface textured mechanical seal as well as untextured mechanical seal were comparatively investigated under different sealed pressure and rotation speed on a computer aided testing device for mechanical seals. Experimental results show that within the experimental limits, the effect of laser surface texturing on improving the lubrication properties of mechanical seals is largely susceptible to the sealed medium pressure, but the influence of rotation speed is relative low. A comparison of the performance of laser surface textured mechanical seal with that of a baseline, untextured mechanical seal, is presented showing that laser surface textured mechanical seal can significantly improve the lubrication properties and the friction torque can be reduced at most 60% under the lower sealed medium pressure(such as 0.2 MPa). However, under the higher medium sealed pressure(such as 0.8 MPa), laser surface textured mechanical seal can improve the lubrication properties only when the rotation speed reached a critical value, and the effect is slightly lesser.
[1] Etsion I. Improving tribological performance of mechanical components by laser surface texturing[J].Tribology Letters,2004,17(4):733-737.[2] Etsion I,Burstein L.A model for mechanical seals with regular microsurface structure[J].Tribology Transactions,1996,39(3):677-683.[3] Etsion I,Kligerman Y. Analytical and experimental investigation of lasertextured mechanical seal faces[J].Tribology Transactions,1999,42(3):667-683. [4] Etsion I. State of the art in laser surface texturing[J].Journal of Tribology,2005,127(1):248-253.[5] Etsion I,Halperin G. A laser surface textured hydrostatic mechanical seal[J].Tribology Transactions,2002,45(3):430-434.[6] Yu X Q,He S,Cai R L. Frictional characteristics of mechanical seals with a lasertextured seal faces[J].Journal of Materials Processing Technology, 2002,129(1/2/3):463-466.[7] Wan Y,Xiong D S. The effect of laser surface texturing on frictional performance of face seal[J].Journal of Materials Processing Technology, 2008,197(1/2/3):96-100.[8] 彭旭东，杜东波，李纪云.不同型面微孔对激光加工多孔端面机械密封性能的影响[J].摩擦学学报，2006，26(4):367-371.Peng Xudong,Du Dongbo,Li Jiyun. Effect of different section profile micropores on seal performance of a laser surface textured mechanical seal[J].Tribology, 2006,26(4):367-371.(in Chinese)[9] 彭旭东，杜东波，盛颂恩，等.端面微型体对液体润滑机械密封性能的影响[J].摩擦学学报，2007，27(4):352-356.Peng Xudong,Du Dongbo,Sheng Song'en,et al. Effect of face asperity geometry on performance of a liquid lubricated face seal[J].Tribology,2007,27(4):352-356.(in Chinese)［10］ 符永宏，纪敬虎，华希俊，等.端面规则凹坑造型机械密封综合性能的数值分析[J].排灌机械工程学报，2010，28(2)：169-173.Fu Yonghong,Ji Jinghu,Hua Xijun,et al. Numerical analysis of integrated performance of mechanical seals with regular micro-surface structure[J].Journal of Drainage and Irrigation Machinery Engineering,2010,28(2):169-173.(in Chinese)［11］ 符永宏，纪敬虎，杨超君，等.新型零泄漏非接触式机械密封及其激光表面微织构跨尺度加工工艺研究[J]. 润滑与密封，2008，33(1)：27-32.Fu Yonghong,Ji Jinghu,Yang Chaojun,et al. The study of a new type of zeroleakage and noncontact mechanical seal and the laser surface texturing with crossing domension processing[J].Lubrication Engineering,2008,33(1):27-32.(in Chinese)［12］ 华希俊，符永宏，王 霄，等.内燃机缸套激光珩磨技术及其性能试验研究[J].中国机械工程，2007，18(24)：2989-2992.Hua Xijun,Fu Yonghong,Wang Xiao,et al. Experimental research on laser honing of engine cylinder bore[J].Chinese Journal of Mechanical Engineering,2007，18(24)：2989-2992.(in Chinese)［13］ 魏 龙，顾伯勤，孙见君，等.机械密封计算机辅助试验装置的研制[J].润滑与密封，2006，31(4):136-139.Wei Long,Gu Boqin，Sun Jianjun,et al. Development of the computer aided testing device for mechanical seals[J].Lubrication Engineering,2006,31(4):136-139.(in Chinese)
