Mechanics & Industry
Volume 21, Number 6, 2020
|Number of page(s)||9|
|Published online||06 January 2021|
A Thermo-hydrodynamic lubrication model of a mechanical seal modified by equivalent film thickness
School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213000, PR China
2 School of Computer Engineering, Jiangsu University of Technology, Changzhou 213000, PR China
* e-mail: email@example.com
Accepted: 6 December 2020
An effective way to improve the combined performance of mechanical seals is to optimize their surface textures using multi-objective optimization method. For compatibility with the multi-objective optimization algorithm, the theoretical performance of a mechanical seal is often determined using the finite-difference method (FDM). However, compared with the finite-volume method (FVM) and finite-element method (FEM), FDM is weaker for dealing with the issue of discontinuous film thickness for a textured surface. In the present study, the thermo-hydrodynamic lubrication model of a mechanical seal is modified by means of an equivalent-thickness treatment, and the accuracy of the modified lubrication model is assessed by comparing its predictions for film pressure and temperature with published FVM and FEM results, showing that the equivalent-thickness lubrication model is effective for addressing the issue of discontinuous film thickness. The present work is important in that it improves the simulation accuracy of multi-objective optimization for textured mechanical seals.
Key words: Mechanical seal / multi-objective optimization / surface texture / discontinuous film thickness / equivalent thickness
© AFM, EDP Sciences 2021
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