考虑柔性支承三维变形的线切割一体化轴承静态承载特性研究  

Investigation on Static Load-bearing Characteristic of Wire-cut Integrated Hydrodynamic Bearing Considering 3-D Deformation of Flexible Support

作　　者：尹雪梅 姬帅城 张一魁 李奕君 吴超 何文斌 YIN Xuemei;JI Shuaicheng;ZHANG Yikui;LI Yijun;WU Chao;HE Wenbin(College of Energy and Power Engineering,Zhengzhou University of Light Industry,Zhengzhou Henan 450002 China;College of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Zhengzhou Henan 450002 China)

机构地区：[1]郑州轻工业大学能源与动力工程学院,河南郑州450002 [2]郑州轻工业大学机电工程学院,河南郑州450002

出　　处：《润滑与密封》2022年第3期96-101,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(U1404515);河南省科技攻关项目(222102220032;212102210359);河南省高等学校重点科研项目(22A460032);2020年度河南省高校科技创新团队项目(20IRTSTHN015)。

摘　　要：根据线切割一体化轴承的结构特点,利用CFD重叠网格技术,建立线切割一体化轴承数值计算模型,采用双向流固耦合计算方法,考虑柔性支承的三维变形,考察线切割一体化轴承的承载性能随线切割轴瓦厚度、柔性铰链支承高度和支承宽度变化的影响。计算结果表明:随着偏心率或转速的增加,轴承偏位角呈下降趋势,黏度阻力、载荷呈上升趋势;与不考虑支承变形相比,支承变形会减小瓦块的旋转刚度和径向刚度,降低线切割一体化轴承的承载载荷,但可以改善轴承的静特性;柔性支承宽度和高度对线切割一体化轴承承载特性的影响比轴瓦厚度影响更大,减小支承高度或者增大支承宽度,线切割轴承性能更趋于固定瓦轴承,这可为线切割一体化轴承的设计提供一定的理论依据。Based on analyzing the structural characteristics of the wire-cut integrated hydrodynamic(WCI)bearing,overlapping grid technology of CFD software was adopt to build up the numerical calculation modal of the bearing.Considering the three-dimensional deformation of the flexible support,the effect of the thickness of the bearing bush,the height of the hinge support and the width of the support on the load-bearing characteristics of the WCI bearing was investigated by use of the two-way fluid-structure coupling method.The results show that with the increase of eccentricity or rotating speed,the bearing deflection angle decreases,and the viscosity resistance and load increase.Compared with not considering the support deformation,the support deformation will reduce the rotational stiffness and radial stiffness of the pad,reduce the bearing load of the WCI bearing,but can improve the static characteristics of the bearing.The width and height of the flexible support have a greater impact on the load-bearing characteristics of the WCI bearing than the thickness of the bearing bush.The bearing performance tends to fixed pad bearings through reducing its support height or increasing its support width.It provides a theoretical basis for the design of the wire-cut integrated hydrodynamic bearing.

关 键 词：线切割一体化轴承 承载特性 柔性支承 双向流固耦合 

分 类 号：TH133.3[机械工程—机械制造及自动化]