In the actual working condition, due to the manufacturing errors, improper installation, load, thermal deformation or other factors can cause the journal surface to produce the form and position errors. The mathematical models are developed that takes into account the form and position errors, the lubrication performance of four-recess capillary restrictor hybrid journal bearings with different journal tilt angles and cylindricities is studied, and the effect of eccentricity on the oil film lubrication performance is analysed. The results show that the dimensionless oil film pressure and loading capacity increase as the journal tilt angle and eccentricity increase considering journal tilt, and the friction coefficient tends to increase and then decrease. Compared with journal alignment, the oil film thickness distorts, the oil film pressure peak shifts to the edge of bearing, and the horizontal tilt has a greater impact on bearing when the journal is tilted. The oil film pressure distribution has no significant change considering cylindricity errors, while the oil film pressure value increases, the loading capacity increases and the coefficient of friction decreases as the cylindricity and eccentricity increase. The research shows that the presence of a certain cylindricity error contributes to the lubrication performance of four-recess capillary restrictor hybrid journal bearings.

中文翻译：

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轴颈形状和位置误差对四槽毛细管限流混合轴颈轴承润滑性能的影响研究

在实际工况下，由于制造误差、安装不当、载荷、热变形或其他因素都会导致轴颈表面产生形位误差。建立了考虑形位误差的数学模型，研究了不同轴颈倾斜角和圆柱度的四槽毛细管限流器混合轴颈轴承的润滑性能，分析了偏心率对油膜润滑性能的影响。结果表明，无量纲油膜压力和承载能力随着轴颈倾斜角和考虑轴颈倾斜的偏心率的增加而增加，并且摩擦系数呈现先增加后减少的趋势。与轴颈对准相比，油膜厚度扭曲，油膜压力峰值移至轴承边缘，轴颈倾斜时水平倾斜对轴承影响较大。考虑圆柱度误差时，油膜压力分布没有明显变化，但随着圆柱度和偏心率的增加，油膜压力值增大，承载能力增大，摩擦系数减小。研究表明，一定圆柱度误差的存在有助于四凹槽毛细管限流器混合轴颈轴承的润滑性能。随着圆柱度和偏心率的增大，承载能力增大，摩擦系数减小。研究表明，一定圆柱度误差的存在有助于四凹槽毛细管限流器混合轴颈轴承的润滑性能。随着圆柱度和偏心率的增大，承载能力增大，摩擦系数减小。研究表明，一定圆柱度误差的存在有助于四凹槽毛细管限流器混合轴颈轴承的润滑性能。