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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.
Considering the influence of the topography on mechanical seal performance and processing cost, the fractal theory was used to analyze the relationship between the fractal dimension of the end face and the leakage rate, and the concept of economical machining fractal dimension of the seal face was put forward.According to GY-70 mechanical seal Sealing performance test and the measurement of the topography parameters, it was found that the rate of increase of the fractal dimension of the seal face gradually decreases and the rate of decrease of the leakage rate decreases with the increase of the running time. When the t is 130 h, the leakage rate Q reaches the allowable The value of 5 × 10-6m3 / h, D = 1.645.The results show that the mechanical seal based on the allowable leakage rate has a certain degree of economic processing fractal dimension.The rational design of the fractal dimension of the seal face can avoid blindly improve the machining accuracy and shorten the mechanical seal Of the run-in time, to achieve the initial seal.