Leakage Model of Contacting Mechanical Seal Based on Fractal Theory

doi:10.12068/j.issn.1005-3026.2019.04.014

Abstract

Abstract: At present， most studies about the seal are based on the assumption that the seal surface topography and friction conditions are changeless. The influence of the seal surface topography on the leakage is mostly ignored as well as the effect of the microscopic perspective. Based on the fractal theory， the contact between surfaces of dynamic and static rings was simplified to the contact between rough surface and the ideal rigid plane， and a mechanical seal leakage model was established. The effects of fractal parameters， the surface unit load and material parameters on leakage rate were studied to obtain that the mechanical seal fractal dimension D and the end face specific load p_○g were inversely proportional to the leakage amount Q. The characteristic length scale parameter G and the comprehensive elastic modulus E were proportional to its leakage amount Q. The calculated leakage rate and experimental data verify the accuracy of the model.

Key words: fractal theory, mechanical seal, contact surface, surface topography, leakage

CLC Number:

TH136

LI Xiao-peng， YANG Ze-min， WANG Lin-lin， YANG Yu-xing. Leakage Model of Contacting Mechanical Seal Based on Fractal Theory[J]. Journal of Northeastern University Natural Science, 2019, 40(4): 526-530.

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