Abstract

Zinc dialkyldithiophosphate (ZDDP) is a widely used lubricant additive due to its high effectiveness in reducing wear by forming a tribofilm on sliding surfaces. However, the formation and removal of tribofilm are two competing processes depending on the working conditions, and ZDDP loses its anti-wear function when the removal process prevails. In this paper, a numerical model is built up to predict if ZDDP tribofilm can cover the sliding surfaces and protect them from wear. The input of this model includes the morphology of two sliding surfaces and parameters related to the surface materials, the working conditions and the lubricant, and the output is the surface with tribofilm and/or wear. Then, this model is used for the cylinder liner surface of an internal combustion engine, and a modeling result matching the actual case is obtained, proving that this model can be used in the design of an efficient lubrication system by searching the optimum combination of various parameters. Additionally, it is found that the resolution of the input surfaces has an impact on the modeling result, indicating that caution should be taken when comparing surfaces with different resolutions.

Graphical Abstract

中文翻译：

---

ZDDP摩擦膜在粗糙表面上的形成和去除的建模

摘要

二烷基二硫代磷酸锌（ZDDP）是一种广泛使用的润滑剂添加剂，因为它通过在滑动表面上形成摩擦膜来降低磨损，具有很高的功效。然而，取决于工作条件，摩擦膜的形成和去除是两个相互竞争的过程，当去除过程占优势时，ZDDP失去其抗磨功能。在本文中，建立了一个数值模型来预测ZDDP摩擦膜是否可以覆盖滑动表面并保护其免受磨损。该模型的输入包括两个滑动表面的形态以及与表面材料，工作条件和润滑剂相关的参数，输出是带有摩擦膜和/或磨损的表面。然后，将该模型用于内燃机的汽缸套表面，并获得与实际情况相匹配的建模结果，通过搜索各种参数的最佳组合，证明该模型可用于高效润滑系统的设计。另外，发现输入表面的分辨率对建模结果有影响，这表明在比较具有不同分辨率的表面时应格外小心。

图形概要