基于CFD的船用柴油机滑动轴承油膜稳定性研究  

Research on oil film stability of sliding bearing of marine diesel engine based on CFD

作　　者：张成 雷军 符博峰 郭璐明 赵战航 韦燕霞 雷娇娇 ZHANG Cheng;LEi Jun;FU Bo-feng;GUO Lu-ming;ZHAO Zhan-hang;WEI Yan-xia;LEI Jiao-jiao(Shanxi Diesel&Engine Heavy Industry Co.,Ltd.,Xingping 713100,China)

机构地区：[1]陕西柴油机重工有限公司,陕西兴平713100

出　　处：《舰船科学技术》2022年第16期94-96,共3页Ship Science and Technology

摘　　要：基于滑动轴承的动压润滑理论,建立滑动轴承油膜CFD三维模型,采用结构化网格对计算域进行离散,为研究油膜压力对滑动轴承稳定性的影响,运用Fluent软件通过RNGκ-ε湍流模型对油膜流场进行计算,模拟在不同转速及不同进油压力下,油膜压力场的三维分布。计算结果表明:随着轴颈开始逆时针旋转,在最小油膜厚度处两侧分别呈现高压区和低压区;随着转速逐渐增大,高压区和低压区逐渐在增大。在相同转速下,进油压力增加,高压区逐渐向进油孔位置扩散,直至与低压区相接。该方法为滑动轴承油膜稳定性研究提供了理论依据。Based on the hydrodynamic lubrication theory of sliding bearing, a three-dimensional CFD model of oil film of sliding bearing is established, and the calculation domain is discretized by using structured grid. In order to study the influence of oil film pressure on the stability of sliding bearing, the Fluent software is used through RNG κ-ε. The turbulent model is used to calculate the oil film flow field, and the three-dimensional distribution of oil film pressure field is simulated under different rotational speeds and different inlet pressures. The calculated results show that as the journal begins to rotate anticlockwise, there are high pressure area and low pressure area on both sides of the minimum oil film thickness, and the high pressure area and low pressure area increase gradually with the increase of rotational speed. At the same speed, the oil inlet pressure increases, and the high pressure area gradually diffuses to the oil inlet hole until it connects with the low pressure area. This method provides a theoretical basis for the study of oil film stability of sliding bearing.

关 键 词：滑动轴承 油膜压力 数值模拟 CFD 

分 类 号：U664.121[交通运输工程—船舶及航道工程]