径向滑动轴承表面缺陷对润滑状态影响的模拟研究

大连海事大学学报 ›› 2014, Vol. 40 ›› Issue (4) : 1-6.

船舶与海洋工程

肖敏，严志军，林助军，朱新河，程东

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A simulation of surface defect effect on radial sliding bearing lubrication

XIAO Min, YAN Zhi-jun, LIN Zhu-jun, ZHU Xin-he, CHENG Dong

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文章历史 +

摘要

径向滑动轴承在运行过程中可能会因磨损、疲劳出现裂纹等缺陷，这些缺陷会影响轴承的润滑状态。在基于Reynolds方程对表面有缺陷的径向滑动轴承进行理论建模并开展数值模拟，得到了表面有缺陷的轴承润滑过程中油膜厚度、压力的分布，研究了不同尺度、形状和分布的缺陷对径向滑动轴承润滑状态的影响。研究结果表明，缺陷的周向位置对润滑状态的影响最大。当缺陷位于滑油出口范围之前，轴承的承载力减小，摩擦因数增大；当缺陷位于滑油出口之后，能够形成附加楔形效应，使承载力增大，摩擦因数降低。缺陷宽度增加则会扩大以上因素的影响程度。缺陷的轴向位置对轴承润滑状态影响不大，但当缺陷在滑油出口之前且靠近轴承边缘时会明显降低承载力。

Abstract

Radial sliding bearing may form cracks and other kinds of defects due to wear and fatigue during operation. These defects will affect bearing lubrication. The theoretical model and numerical simulation of radial sliding bearing are based on the Reynolds equation. Through theoretical analysis, oil film thickness and pressure distribution in the process of bearing lubrication are obtained. And surface defect parameters of width and location effect on lubrication state parameters are also obtained. The largest influence on lubrication is defect circumferential position, especially when defect is located before oil outlet. Bearing loading capacities are reduced while coefficients of friction increased. When the defect is located after oil outlet, which itself can form a small wedge effect, as a result, bearing loading capacities are reduced and coefficients of friction decreased. With the increase of width of defect will expand the impact of the above factors. The axial position of the defects has little effect on bearing lubrication, but when the defect is located before oil outlet and near bearing edge will be significantly reduced bearing loading capacities.

导出引用

肖敏严志军林助军朱新河程东. 径向滑动轴承表面缺陷对润滑状态影响的模拟研究[J]. 大连海事大学学报. 2014, 40(4): 1-6

A simulation of surface defect effect on radial sliding bearing lubrication[J]. Journal of Dalian Maritime University. 2014, 40(4): 1-6

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