Abstract

In this study, the frictional properties of dry gas seal rings with a diamond-like carbon (DLC) film textured surface were investigated using a vertical universal friction and wear tester. The ensemble empirical mode decomposition (EEMD) method was applied to extract friction and vibration signals. In combination with chaos theory, analyses of the friction and wear of dry gas seal rings were performed under specific working conditions. The results show that the variation in friction vibration attractors and phase-point average distance is consistent with the change in the friction coefficient. The DLC film textured surface effectively improves the frictional properties of dry gas seals. The edges of the microtextured pits can cut debris, so the diameter of the debris becomes increasingly smaller. At the same time, the microtextured pits can also capture wear debris. The optimized dimple diameter and area density were 250 μm and 15%, respectively. In this case, the texture pit can catch almost all of the debris, but the friction vibration was not severe.

摘要

在这项研究中，使用垂直通用摩擦磨损试验机研究了具有类金刚石碳 (DLC) 膜纹理表面的干气密封环的摩擦性能。集成经验模态分解（EEMD）方法被应用于提取摩擦和振动信号。结合混沌理论，对特定工况下干气密封环的摩擦磨损进行了分析。结果表明，摩擦振动吸引子和相点平均距离的变化与摩擦系数的变化是一致的。DLC薄膜纹理表面有效提高了干气密封的摩擦性能。微纹理坑的边缘可以切割碎屑，因此碎屑的直径变得越来越小。同时，微纹理凹坑还可以捕获磨损碎屑。优化的凹坑直径和面积密度分别为 250 μm 和 15%。在这种情况下，纹理坑几乎可以捕获所有碎屑，但摩擦振动并不严重。