三瓣结构的滑梁式空气箔片轴承润滑力学建模及数值研究  

Lubrication Mechanics Model and Numerical Study of Sliding Beam Type Gas Foil Bearing with Three-Pad Structure

作　　者：吴洋 韩怡萱 顾晨昀 冯伟军 安琦[1] WU Yang;HAN Yixuan;GU Chenyun;FENG Weijun;AN Qi(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Suzhou Changheng Precision Metal Die Casting Co.Ltd,Suzhou 215534,Jiangsu,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]苏州昌恒精密金属压铸有限公司,江苏苏州215534

出　　处：《华东理工大学学报(自然科学版)》2025年第1期135-146,共12页Journal of East China University of Science and Technology

摘　　要：以三瓣结构的滑梁式空气箔片轴承为研究对象,基于最小位能原理和非线性薄板理论建立了箔片的刚度矩阵,并通过接触理论和牛顿法建立了箔片形变的计算模型;采用有限差分法计算等温雷诺方程,并通过流固耦合方法,建立了完整的滑梁式箔片轴承的力学模型。确定了计算流程,编写了计算程序,实现了对气膜压力分布、滑梁挠度和轴承极限载荷等参数的精确计算。结合具体算例,深入研究轴承参数对其性能的影响,研究表明,滑梁数目增多会降低轴承的最小气膜厚度,而增大轴向对称面的滑梁刚度可以提升轴承的极限承载能力。The structure of the three-pad sliding beam air foil bearing is analyzed.The mesh of the foils is divided into mixed elements,and the stiffness matrix of the foils is calculated based on the principle of minimum potential energy and the nonlinear thin plate theory.The finite difference method is used to deal with Reynolds equation,and the distribution of gas film pressure is calculated.Finally,the fluid-structure coupling of gas film pressure and foil deformation are calculated by weak coupling method.The calculation process is determined,the calculation program is written,and the accurate calculation of gas film pressure distribution,sliding beam deflection and bearing limit load is realized.Combined with concrete examples,the effects of rotor speed,bottom foil thickness,bearing position angle,number of sliding beams and width distribution on bearing capacity are deeply studied.The relevant regularity curves are obtained,and the corresponding analysis of these results is carried out,which can provide a theoretical basis for the optimal design of foil gas bearing.The results show that the increase of the number of sliding beams will reduce the minimum film thickness of the bearing,and the increase of the stiffness of the sliding beam at the axial symmetry plane can increase the bearing limit load.Reducing the bearing mounting angle can reduce the rotor eccentricity,but also can reduce the bearing limit load.

关 键 词：滑梁式空气轴承 三瓣结构 润滑力学建模 流固耦合 数值分析 

分 类 号：TH133.35[机械工程—机械制造及自动化]