In order to study the effects of operating parameters and surface topography on temperature of the end faces for mechanical seals, an average temperature calculation model of end faces for mechanical seals was established based on the contact fractal model and the friction factor fractal model, adopting fractal parameters to characterize surface topography, and simplifying the seal ring as equal cross-sectional equivalent cylinder. Influencing factors of average temperature were analyzed by simulation calculation for friction pair faces matched by cemented carbide YG8-carbon graphite M106K of partial balance mechanical seal. Theoretical calculation results show that the average temperature of seal face increased linearly with the increase of spring pressure or sealed fluid pressure, and increased approximately linearly with the increase of rotating speed. The average temperature increased with the increase of fractal dimension and with the decrease of characteristic length scale of the soft ring. The change of average temperature was smaller when the fractal dimension was smaller and the characteristic length scale was larger, while the average temperature increased rapidly when the fractal dimension was larger and the characteristic length scale was smaller.
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