机械密封摩擦副端面形貌的分形特性  

Fractal Characteristics of End Faces' Topography in Friction Pair of Mechanical Seals

作　　者：魏龙[1,2] 顾伯勤[1] 冯飞[2] 冯秀[2] 孙见君[3] 黄建[2] 

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京210009 [2]南京化工职业技术学院流体密封与测控研究所,江苏南京210048 [3]南京林业大学机电工程学院,江苏南京210037

出　　处：《石油化工高等学校学报》2009年第2期59-62,共4页Journal of Petrochemical Universities

基　　金：江苏省"六大人才高峰"资助项目(07-D-027);江苏省高校科研成果产业化推进项目(JHZD07-015;JH08-016)

摘　　要：介绍了表征粗糙表面形貌分形特征的Weierstrass-Mandelbrot函数式,分析了判断粗糙表面形貌分形特性的功率谱法和结构函数法。采用AF-LI型触针式表面轮廓测量仪测量了GY70型机械密封摩擦副端面的径向及周向轮廓曲线。利用结构函数法分析了端面轮廓的分形特性,通过计算得出动环端面径向和周向分形维数分别为1.293,1.291,静环端面径向和周向分形维数分别为1.288,1.283。研究结果表明,GY70型机械密封摩擦副动、静环端面轮廓均具有统计自仿射分形特性且各向同性。The Weierstrass--Mandelbrot function was introduced, which can characterize the rough surface topography. Two methods to evaluate the fractal parameters of the rough surface topography （i. e. power spectrum and structure function） were analyzed. The radial and circumferential profiles of friction pair of GY70 mechanical seals were measured by the AF--LI type stylus profilometer, and the fractal characteristics of the profiles were analyzed by the structure function. The radial and circumferential fractal dimensions of the rotating ring end face are 1. 293 and 1. 291 respectively, and that of the stationary ring end face are 1. 288 and 1. 283. The results indicate that the rotating and stationary ring profiles of friction pair are isotropic and have the statistical self--affine dimension characters.

关 键 词：机械密封 端面形貌 分形特性 结构函数 

分 类 号：TH136[机械工程—机械制造及自动化]