摘要
以波箔型气体箔片推力轴承为研究对象,运用弹性力学理论构建了波箔和顶箔的受力变形模型,计算箔片结构变形量,得到气膜厚度方程。在此基础上,结合可压缩气体Reynolds方程,构建了一种能够对波箔型气体箔片推力轴承润滑性能进行计算的流固耦合模型。结合具体文献对所建立的流固耦合计算模型进行了验证,证明了算法的可靠性。通过具体算例,用数值方法研究了轴承的量纲为一气膜压力分布、量纲为一气膜厚度分布与箔片结构变形量分布。对比研究了箔片推力轴承和刚性推力轴承的润滑性能,发现箔片轴承的气膜厚度较大,承载力和摩擦力矩较小。深入研究了波箔厚度、波拱半长、波拱半径和顶箔厚度对轴承润滑性能的影响规律,得到了相关曲线图,结果表明:轴承的承载力和摩擦力矩随波箔厚度或顶箔厚度的增大而增大,随波拱半长或波拱半径的增大而减小。
By taking bump-type gas foil thrust bearing as the research object,a force and deformation model of bump foil and top foil was established by elastic mechanics analysis.The foil structure deformation was calculated and the gas film thickness equation was obtained.On this basis,a fluid-solid coupling model used for calculating the lubrication performance of bump-type gas foil thrust bearings was established with use of Reynolds equation for compressible gas.The established fluid-solid coupling calculation model was tested with specific literature,demonstrating the reliability of the algorithm.With a specific example,the dimensionless gas film pressure distribution,dimensionless gas film thickness distribution and foil structure deformation distribution of the bearing were calculated numerically.The lubrication performance of foil thrust bearing and that of rigid thrust bearing were compared.It was found that the gas film thickness of foil bearing was larger,while the bearing capacity and friction torque were smaller.The influences of bump foil thickness(tB),half bump length(l),bump radius(R0),and top foil thickness(tT)on the lubrication performance of the bearing were studied,and relevant curves were obtained,which showed that bearing capacity and friction torque will increase with the increase of tB or tT,and decrease with the increase of l or R0.
作者
许浩杰
高磊
安琦
XU Haojie;GAO Lei;AN Qi(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Hebei Automobile Engineering Technology&Research Center,Great Wall Motor Company Limited,Baoding 071000,Hebei,China)
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第1期101-109,共9页
Journal of East China University of Science and Technology
关键词
波箔
推力轴承
润滑性能
流固耦合
数值研究
bump foil
thrust bearing
lubrication performance
fluid-solid coupling
numerical study
