Simulation research on normal stiffness of floating ring seal end face based on the fractal theory

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (16) : 103-110.

LIU Yong1，GUO Haodong1，ZHANG Qing1，YAN Fangchao2

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Abstract

Floating ring seals are one of the commonly used sealing forms for modern aero-engines. The contact stiffness of the end face of the floating ring has an important effect on the friction and wear performance of the auxiliary sealing surface of the floating ring seal. In this paper, a new calculation model of normal contact stiffness is established on the basis of fractal model. And the normal contact stiffness of floating ring seal end face is calculated by this model. The change law of the normal contact stiffness of the floating ring seal end face with pressure and roughness is obtained. The calculation results show that the normal contact stiffness obtained by the proposed method is in good agreement with the experimental results, and the maximum relative error does not exceed 4%; the normal contact stiffness of the floating ring seal end face increases with the increase of pressure, and decreases with the increase of the roughness of the contact surface. This method provides a new method for the calculation of the normal contact stiffness of the floating ring seal end face.

Key words

Aircraft engine / Floating ring seal / Rough surfaces / Normal contact stiffness / Fractal theory / Contact mechanics;

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LIU Yong1, GUO Haodong1, ZHANG Qing1, YAN Fangchao2. Simulation research on normal stiffness of floating ring seal end face based on the fractal theory[J]. Journal of Vibration and Shock, 2024, 43(16): 103-110

References

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