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The Influence of Micro Morphology on Leakage of Metal Seals in Hydraulic Component | IEEE Conference Publication | IEEE Xplore

The Influence of Micro Morphology on Leakage of Metal Seals in Hydraulic Component


Abstract:

Metal contact sealing is commonly used in hydraulic components under complex conditions such as high temperature and high pressure. When the sealing force is constant, th...Show More

Abstract:

Metal contact sealing is commonly used in hydraulic components under complex conditions such as high temperature and high pressure. When the sealing force is constant, the micro-contact condition of the sealing pair determines the sealing effect. This article uses finite element simulation to study the relationship between leakage and rough surface morphology from a micro perspective. Firstly, rough surfaces were constructed based on the point cloud function which can be described by the different root mean square of roughness-(RMS-roughness) and autocorrelation functions. Then, sealing contact models were developed using these rough surfaces separately combine with a smooth surface to simulate different micro-contact situations under the same contact pressure. Subsequently, the leakage channel was extracted for leakage calculation, and the RMS-roughness, autocorrelation length, and average height of sealing gap were obtained to conclude the relationship between the actual contact area and leakage amount. The research results indicate that under certain contact pressure conditions, the leakage rate increases sharply approximately exponentially with the increase of the RMS-roughness. However, the leakage amount increases not significantly with the increase of autocorrelation length. The findings provide effective guidance for the design of metal sealing structures.
Date of Conference: 18-21 August 2023
Date Added to IEEE Xplore: 25 June 2024
ISBN Information:
Conference Location: Lanzhou, China

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