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Numerical investigation on the static performance of aerostatic journal bearings with different pocket shapes by the finite-element method
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology ( IF 1.6 ) Pub Date : 2020-12-28 , DOI: 10.1177/1350650120979115
Xinglong Chen 1, 2 , James K Mills 2 , Kai Shi 1 , Gang Bao 1
Affiliation  

In this work, to improve the static behavior of aerostatic journal bearings, we examine the effect of pockets with different shapes, including the square, rectangular 1, rectangular 2, and circular, manufactured on the surface of the aerostatic journal bearing. The effects of the pocket shapes, pocket area S¯, eccentricity ratio ɛ, orifice diameter df, average gas film thickness h0, and misalignment angles φx and φy on the static performance are investigated using simulations. The Reynolds equation is solved by the finite-element method in this work. Simulations reveal that the pocket area S¯, eccentricity ratio ɛ, gas film thickness h0, orifice diameter df, and misalignment angles φx and φy have a significant influence on the load force F and the stiffness K. In general, rectangular 2 pocket bearings are found to perform somewhat better than bearings with other pocket shapes, with the pocket depth set to one-half of h0, when the pocket area S¯ varies from one-twelfth to one. The pocket area S¯ should be set according to the average gas film thickness h0 and the orifice diameter df to achieve a better static performance for the bearings. For bearings operated with misalignment angles φx and φy, different pocket areas S¯ should be set according to the pocket shapes for the optimal design.



中文翻译:

有限元法对不同型腔静压轴颈轴承静态性能的数值研究

在这项工作中,为了改善空气静压轴承的静态性能,我们研究了在空气静压轴承表面上制造的不同形状的凹穴的影响,包括方形,矩形1,矩形2和圆形。口袋形状,口袋面积的影响小号¯,偏心率ɛ,孔直径d f,平均气膜厚度h 0和偏心角φXφÿ通过仿真研究静态性能。在这项工作中,雷诺方程是通过有限元法求解的。模拟显示口袋区域小号¯,偏心率ɛ,气膜厚度h 0,孔直径d f和偏心角φXφÿ对负载力F和刚度K有重要影响。通常,发现矩形2凹窝轴承的性能要好于其他凹腔形状的轴承,当凹窝面积设为h 0时,凹窝深度应设为h 0的一半小号¯从十二分之一到一。口袋区域小号¯应根据平均气膜厚度h 0和孔口直径d f进行设置,以使轴承具有更好的静态性能。用于偏心角轴承φXφÿ,不同的口袋区域 小号¯ 应根据口袋形状进行设置,以实现最佳设计。

更新日期:2020-12-28
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