Purpose

This study aims to research the influence mechanism of microtextured geometric parameters of dry gas seal end face on the tribological behavior under dry frictional conditions.

Design/methodology/approach

The microtexture was processed using laser processing, while the diamond-like carbon (DLC) film was applied through magnetron sputtering; the experimental platform of friction vibration was established, the frictional and vibrational properties of different geometric parameters were tested; the data signals of vibrational acceleration and frictional torque were collected and processed using data acquisition instrument. The entropy characteristic parameters of 3D vibrational acceleration were extracted based on wavelet packet decomposition method. The end-face topography was measured with ST400 three-dimensional noncontact surface topography instrument.

Findings

The geometry of pits plays a key role in influencing friction performance; the permutation entropy and fuzzy entropy of the vibration acceleration signal changed with variations in microtextured parameters. A textured surface with appropriately size parameters can trap debris, enhance the dynamic pressure effect, reduce impact between the friction interfaces and improve the frictional vibrational performance. In this research, microtextured surface with Φ150 µm-10% and Φ200 µm-5% can effectively reduce friction and vibration between the end faces of a dry gas seal.

Originality/value

DLC film improves the hardness of seal ring end face, and microtexture improves the dynamic effect; the tribological behavior monitoring can be realized by analyzing the characteristics of vibration acceleration sensitive parameter with friction state. The findings will provide a basis for further research in the field of tribology and the microtexture optimization of dry gas seal ring end face.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2023-0389/

中文翻译：

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干气密封环微观织构参数对摩擦学性能的影响

目的

本研究旨在研究干气密封端面微织构几何参数对干摩擦条件下摩擦学行为的影响机制。

设计/方法论/途径

采用激光加工技术加工微纹理，并通过磁控溅射沉积类金刚石碳（DLC）薄膜；搭建了摩擦振动实验平台，测试了不同几何参数下的摩擦振动特性；利用数据采集仪采集并处理振动加速度和摩擦扭矩的数据信号。基于小波包分解方法提取了三维振动加速度的熵特征参数。采用ST400三维非接触式表面形貌仪测量端面形貌。

发现

凹坑的几何形状对摩擦性能的影响起着关键作用；振动加速度信号的排列熵和模糊熵随着微纹理参数的变化而变化。具有适当尺寸参数的织构表面可以捕获碎屑，增强动压效应，减少摩擦界面之间的冲击，提高摩擦振动性能。本研究中，Φ150 µm-10%和Φ200 µm-5%的微纹理表面可以有效减少干气密封端面之间的摩擦和振动。

原创性/价值

DLC膜提高密封圈端面硬度，微纹理改善动态效果；通过分析振动加速度敏感参数随摩擦状态的变化特征，实现摩擦学行为监测。研究结果将为摩擦学领域的进一步研究和干气密封环端面微观织构优化提供基础。

同行评审

本文的同行评审历史记录位于：https://publons.com/publon/10.1108/ILT-12-2023-0389/