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J4  2012, Vol. 46 Issue (7): 1227-1232    DOI: 10.3785/j.issn.1008-973X.2012.07.011
机械与能源工程     
油膜润滑条件下滑动轴承变形与应力数值模拟
钟崴,崔敏,童水光
浙江大学 热工与动力系统研究所,浙江 杭州 310027
Numerical simulation of deformation and stress in sliding
bearing considering oil film lubrication
ZHONG Wei, CUI Min, TONG Shui-guang
Institute of Thermal Science and Power System,Zhejiang University,Hangzhou 310027,China
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摘要:

针对某汽轮发电机组转子的动压滑动轴承,采用热流耦合方法求解轴瓦及油膜的温度场,应用有限差分法对雷诺方程求解得到开设油槽条件下的油膜压力分布,提出一种离散化的油膜压力载荷与轴瓦内孔表面网格的批量映射匹配方法.在获得能够保证轴承正常工作的合理油膜温度场之后,对轴瓦进行热固耦合求解,得到轴瓦的变形和应力分布.通过分别对不同宽径比与偏心率下轴瓦变形与应力的数值模拟结果比较,得到轴瓦变形及应力分别随宽径比和偏心率的变化规律.结果表明,该方法能够有效地完成动压滑动轴承变形和应力的数值模拟,轴承轴瓦的变形及应力均分别随宽径比和偏心率的增大而增大.

Abstract:

The temperature field in the bush and oil film was solved by using thermo-fluid coupling method aiming at the hydrodynamic sliding bearing of a steam turbine-generator rotor. The oil film pressure distribution was obtained by solving Reynolds‘s equation using finite difference method in condition that the bearing had oil groove. A method of exerting discrete oil film pressure loads in batch onto the meshes of the bush inner hole surface was proposed. After getting reasonable oil film temperature field which can assure good operation of the bearing, the deformation and stress fields were obtained by the thermo-structural coupling way. Meanwhile, the distribution rules of deformation and stress of the bush were proposed by comparing the simulation results with different width-diameter ratio and eccentricity respectively. Results indicate that the numerical simulation of deformation and stress of hydrodynamic sliding bearing can be effectively conducted by the method. The deformation and stress of the bearing bush both increased with the increase of width-diameter ratio and eccentricity respectively.

出版日期: 2012-07-01
:  TK 229.92  
基金资助:

浙江省科技厅重大专项资助项目(2009C11060).

作者简介: 钟崴(1975-),男,副教授,从事动力装备与信息工程技术的研究.E-mail: zhongw@zju.edu.cn
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引用本文:

钟崴,崔敏,童水光. 油膜润滑条件下滑动轴承变形与应力数值模拟[J]. J4, 2012, 46(7): 1227-1232.

ZHONG Wei, CUI Min, TONG Shui-guang. Numerical simulation of deformation and stress in sliding
bearing considering oil film lubrication. J4, 2012, 46(7): 1227-1232.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2012.07.011        http://www.zjujournals.com/eng/CN/Y2012/V46/I7/1227

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