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接触式机械密封端面经济加工分形维数
引用本文:孙见君,何小元,魏龙,冯秀,顾伯勤.接触式机械密封端面经济加工分形维数[J].摩擦学学报,2010,30(4):414-418.
作者姓名:孙见君  何小元  魏龙  冯秀  顾伯勤
作者单位:1. 南京林业大学,机电工程学院,江苏,南京,210037;东南大学,工程力学系,江苏,南京,210096
2. 东南大学,工程力学系,江苏,南京,210096
3. 南京化工职业技术学院流体密封与测控技术研究所,江苏,南京,210048
4. 南京工业大学,机械与动力工程学院,江苏,南京,210096
基金项目:中国博士后科学基金项目(20070410323)和江苏省博士后科学基金项目(0701001C)
摘    要:考虑端面形貌对机械密封性能和加工成本的影响,运用分形理论分析了端面分形参数与泄漏率之间的关系,提出了密封端面经济加工分形维数概念.针对GY-70型机械密封进行了密封性能试验和端面形貌参数测量,发现随着运行时间的推移,密封端面分形维数增大速率逐渐减小,泄漏率降低速率逐渐减小.当t为130 h时,泄漏率Q达到允许值5×10-6m3/h,D=1.645.结果表明:基于允许泄漏率的机械密封,具有一定的经济加工分形维数.合理设计密封端面分形维数可以避免盲目提高加工精度,缩短机械密封的磨合时间,实现初始密封.

关 键 词:密封  表面形貌  泄漏  分形维数

Fractal Dimension of Seal End Face for Cost-effective Finishing Contacting Mechanical Seals
SUN Jian-jun,HE Xiao-yuan,WEI Long,FENG Xiu and GU Bo-qin.Fractal Dimension of Seal End Face for Cost-effective Finishing Contacting Mechanical Seals[J].Tribology,2010,30(4):414-418.
Authors:SUN Jian-jun  HE Xiao-yuan  WEI Long  FENG Xiu and GU Bo-qin
Abstract:By considering the influence of end face morphology on the sealing performance and the processing cost, the relationship of between the fractal parameters of the end face and the leakage rate was analyzed by the fractal geometry theory, and a concept of fractal dimension of seal end face of contacting mechanical seal for cost-effective finishing was put forward. The sealing performance was tested and the end face topography was measured for a GY-70 mechanical seal. It is found that both the increasing rate of seal face fractal dimension and the leakage rate were gradually decreased with the running time. When t=130h, Q reached the allowable leakage rate 5?10-6m3/h and D was equal to 1.645. The research results indicated that there existed a fractal dimension of seal end face for cost-effective finishing contacting mechanical seals which wss correspondent to the allowable leakage rate. Reasonable design of fractal dimension of seal face can avoid blind improve machining precision, shorten the running-in stage and acquire good result of initial seal.
Keywords:seal  surface topography  leakage  fractal dimension
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