Purpose

The purpose of this study is to investigate the influence of dimple radius, depth and density on the lubrication performance of the plunger.

Design/methodology/approach

A lubrication model was adopted to consider eccentricity and deformation during the working process of the plunger, and a rig test was performed to confirm the simulation results. The texture was fabricated using laser surface texturing.

Findings

The simulation results suggested that when dimple radius or depth increases, oil film thickness of the plunger increases before decreasing, and asperity friction displays an opposite trend. Therefore, appropriate microdimple texture could facilitate lubrication performance improvement and reduce the wear. Microdimples were then lased on the plunger surface, and a basic tribological test was conducted to validate the simulation results. The experimental results suggested that the average friction coefficient decreased from 0.18 to 0.13, a reduction of 27.8%.

Social implications

The introduction of microdimple on a plunger couple to reduce friction and improve lubrication is expected to provide a new approach to developing high-performance plunger couple and improve the performance of the internal combustion engine. If applied, the surface texture could help reduce friction by around 27% and cap the cost relative to the plugger friction.

Originality/value

The microdimple texture was introduced into the plunger couple of a vehicle to reduce the friction and improve the performance. Findings suggested that surface texture could be used in the automotive industry to improve oil efficiency and lubrication performance.

Peer review

The peer review history for this article is available at: http://dx.doi.org/10.1108/ILT-07-2020-0259.

中文翻译：

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微凹坑对纹理柱塞泵润滑性能的影响

目的

本研究的目的是研究凹坑半径、深度和密度对柱塞润滑性能的影响。

设计/方法/方法

采用润滑模型考虑柱塞工作过程中的偏心和变形，并进行台架试验验证仿真结果。纹理是使用激光表面纹理制作的。

发现

仿真结果表明，当凹坑半径或深度增加时，柱塞油膜厚度先增后减，粗糙摩擦呈相反趋势。因此，适当的微凹坑纹理有助于改善润滑性能并减少磨损。然后在柱塞表面上激光微凹坑，并进行基本的摩擦学测试以验证模拟结果。实验结果表明，平均摩擦系数从0.18降低到0.13，降低了27.8%。

社会影响

在柱塞偶上引入微凹坑以减少摩擦和改善润滑，有望为开发高性能柱塞偶和提高内燃机性能提供新方法。如果应用，表面纹理可以帮助减少大约 27% 的摩擦，并限制相对于塞子摩擦的成本。

原创性/价值

微凹坑纹理被引入到车辆的柱塞对中，以减少摩擦并提高性能。研究结果表明，表面纹理可用于汽车工业，以提高机油效率和润滑性能。

同行评审

本文的同行评审历史可从以下网址获得：http://dx.doi.org/10.1108/ILT-07-2020-0259。