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Leakage Retardation of Static Seals via Surface Roughness and Wettability Modification.
Zhengpeng Gu1, Qingwen Dai1, Chenbo Ma2
1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 3, 2024
Summary
Surface roughness and wettability significantly impact static seal leakage. Modifying interface properties, like using oleophobic surfaces, can reduce oil leakage by up to 64%.
Area of Science:
- Tribology
- Materials Science
- Fluid Dynamics
Background:
- Static seals are crucial in preventing fluid leakage in various engineering systems.
- Understanding factors influencing seal leakage, such as surface properties, is essential for performance optimization.
- Existing research often overlooks the combined effects of surface roughness and wettability on static seal leakage.
Purpose of the Study:
- To investigate the influence of surface roughness and wettability on the leakage performance of static seals.
- To quantify the relationship between contact pressure, surface roughness, and leakage rate.
- To explore the potential of modifying interface properties for enhanced sealing and reduced leakage.
Main Methods:
- Experimental analysis of leakage rates under varying contact pressures and surface roughness conditions.
- Surface modification techniques to alter wettability, including the use of oleophobic surfaces.
- Development and validation of a theoretical model to predict leakage rates based on wettability.
Main Results:
- Leakage rate shows a negative correlation with contact pressure and a positive correlation with surface roughness.
- Surface wettability was found to significantly affect leakage performance.
- An interface with two oleophobic surfaces demonstrated excellent sealing, achieving approximately 64% leakage reduction.
Conclusions:
- Surface roughness and wettability are critical parameters for static seal performance.
- Modifying interface properties, particularly wettability, offers an effective strategy for leakage retardation.
- The developed theoretical model accurately predicts leakage rates, enabling optimized design for static sealing systems.
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