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.
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 distri- bution was obtained by solving Reynolds＇s equation using finite difference method in condition that the hearing 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 as- sure good operation of the bearing, the deformation and stress fields were obtained by the thermo-structur- al 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.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2012年第7期1227-1232,共6页
Journal of Zhejiang University：Engineering Science
基金
浙江省科技厅重大专项资助项目(2009C11060)
关键词
滑动轴承
油膜压力
热固耦合
sliding bearing
oil film pressure
thermo-structural coupling
