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Abstract
Externally pressurized porous thrust bearings can be used for simultaneous sealing and bearing functions. Performance characterizing metrics of aerostatic seals include load capacity, stiffness, air consumption and leakage. Gas flow in porous aerostatic bearings and seals can be modeled using modified Reynolds equation, where a porous feeding term is included. In this paper, a non-dimensional analytical solution for the pressure distribution is proposed for annular thrust seals with assumption of one-dimensional restrictor flow. It is shown, that the analytic solution is equivalent to a numerical solution with two-dimensional restrictor flow on the most significant performance metrics under static conditions. The theoretical results are validated by experiments with two 64 mm diameter aerostatic graphite seals, demonstrating the accuracy of the proposed models.
Original language | English |
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Article number | 110073 |
Number of pages | 10 |
Journal | Tribology International |
Volume | 200 |
DOIs | |
Publication status | Published - Dec 2024 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Externally pressurized
- Gas lubrication
- Non-contact seal
- Porous restrictor
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POWER Beyond: Kumppanuusmalli - POWER Beyond - Process optimization with friction- and vibrationless technologies for energy efficiency and circularity t
Viitala, R. (Principal investigator), Kajaste, J. (Project Member), Kuosmanen, P. (Project Member), Saikko, V. (Project Member), Närvänen, V. (Project Member), Miettinen, M. (Project Member), Sinkkonen, A. (Project Member), Vainio, V. (Project Member), Rytömaa, S. (Project Member), Morad, O. (Project Member), White, T. (Project Member), Widmaier, T. (Project Member), Haverinen, P. (Project Member), Leutonen, O. (Project Member), Harding, L. (Project Member) & Lamsal, L. (Project Member)
01/09/2022 → 31/08/2025
Project: Business Finland: Other research funding