静压气体轴颈轴承力学特性分析的解析-CFD混合方法

doi:10.3901/JME.2018.11.180

机械工程学报 ›› 2018, Vol. 54 ›› Issue (11): 180-186.doi: 10.3901/JME.2018.11.180

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静压气体轴颈轴承力学特性分析的解析-CFD混合方法

李一飞¹, 尹益辉¹, 阳红², 陈大林¹, 刘信恩¹

1. 中国工程物理研究院总体工程研究所绵阳 621900;
2. 中国工程物理研究院机械制造工艺研究所绵阳 621900

收稿日期:2017-06-13 修回日期:2017-12-13 出版日期:2018-06-05 发布日期:2018-06-05
通讯作者: 尹益辉(通信作者),男,1965年出生,博士,研究员,博士研究生导师。主要研究方向为结构优化设计。E-mail:yinyh@caep.ac.cn
作者简介:李一飞,男,1988年出生,博士研究生。主要研究方向为静压支承轴承的设计与优化。E-mail:liyifei@buaa.edu.cn
基金资助:
国家自然科学基金（11572298）和中国工程物理研究院专项（9120602）资助项目。

Analytic-CFD Combined Method for Analysis of Mechanical Properties of Externally Pressurized Gas Journal Bearing

LI Yifei¹, YIN Yihui¹, YANG Hong², CHEN Dalin¹, LIU Xinen¹

1. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900;
2. Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621900

Received:2017-06-13 Revised:2017-12-13 Online:2018-06-05 Published:2018-06-05

摘要/Abstract

摘要： 在静压气体轴颈轴承的力学性能分析中，工程解析方法使用方便，但由于众多假设的引入而使分析精度不足，单纯计算流体力学（Computational fluid dynamics，CFD）方法精度较高，但因数值建模复杂、模型规模巨大且计算难于收敛而使用不便。针对这两种方法各自的不足，建立小孔节流静压气体轴颈轴承力学特性分析的解析-CFD混合方法，该方法综合解析方法与CFD方法的优点，可在考虑详细气膜流场特性影响的情况下求出轴颈轴承的承载力与刚度。以特定的小孔节流空气静压支承轴颈轴承为例，分别基于解析-CFD混合方法和传统的工程解析法进行计算，并进行相应的试验测试。根据计算结果得到静压气体轴颈轴承的承载力与径向刚度，同时对工程解析方法、解析-CFD混合方法和实测结果进行比较，表明解析-CFD混合方法的计算结果更加接近实测值。

关键词: CFD方法, 工程解析方法, 解析-CFD混合方法, 静压气体轴颈轴承, 小孔节流

Abstract: For mechanical performances analysis of externally pressurized gas journal bearings, the engineering analytic method is convenient to use but the solution precision is poor due to the use of several hypotheses. The computational fluid dynamics (CFD) method possesses a high precision but it is inconvenient to apply due to the difficulty of numerical modeling, large scale of the numerical model and poor calculation convergence. To overcome these demerits and use advantages of both methods, analytic-CFD combined method is proposed for the analysis of mechanical performances of externally pressurized gas journal bearings. Through application of the combined method, load carrying capacity and stiffness of the bearing can be achieved under the consideration of detailed flow field characteristics of the air film. Calculations of mechanical performances of an externally pressurized gas journal bearing are performed by using the traditional engineering analytic method and the present combined method, respectively. Meanwhile, the related experimental measurement is also carried out. Based on the calculations, the bearing load carrying capacity and stiffness are achieved, and the comparison between calculated results and experiment results shows that the analytic-CFD combined method possesses a higher precision than the traditional engineering analytic method.

Key words: analytic-CFD combined method, CFD method, engineering analytic method, externally pressurized gas journal bearing, orifice compensation

中图分类号:

TH133

李一飞, 尹益辉, 阳红, 陈大林, 刘信恩. 静压气体轴颈轴承力学特性分析的解析-CFD混合方法[J]. 机械工程学报, 2018, 54(11): 180-186.

LI Yifei, YIN Yihui, YANG Hong, CHEN Dalin, LIU Xinen. Analytic-CFD Combined Method for Analysis of Mechanical Properties of Externally Pressurized Gas Journal Bearing[J]. Journal of Mechanical Engineering, 2018, 54(11): 180-186.

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静压气体轴颈轴承力学特性分析的解析-CFD混合方法

Analytic-CFD Combined Method for Analysis of Mechanical Properties of Externally Pressurized Gas Journal Bearing

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