基于流固耦合的波箔动压气体轴承承载性能优化
Optimization of Load-Carrying Capacity Performance of Bump Foil Dynamic Pressure Gas Bearing Based on Fluid-Structure Interaction
李东东 1贾晨辉 1张飞 1路艳辉 1杨鲁强2
作者信息
- 1. 河南科技大学机电工程学院,河南洛阳 471003
- 2. 洛阳轴承研究所有限公司,河南洛阳 471039
- 折叠
摘要
基于有限元软件Ansys Workbench,建立波箔动压气体轴承在可压缩流体介质中运动的有限元模型,采用6DOF动网格计算方法对轴承的运动状态进行流固耦合数值模拟,探讨不同转速和波箔片结构参数(波箔的长度比、高度以及厚度)对轴承承载性能的影响规律.结果表明:轴承气膜压力大小的分布与平箔片变形量的大小成对应关系,说明提出的流固耦合方法能很好地反映波箔动压气体轴承的润滑状态;随着转速的增大,轴承动压效应不断增强,承载力增大,且平箔片的结构变形不断增大,致使气膜压力的收敛区发生波动;随着波箔的长度比和波箔片厚度的增加,轴承承载力先快速增大后趋于稳定,而波箔片高度对承载力影响不大,表明适当增加波箔的长度比和波箔片厚度可以提高承载力.
Abstract
Based on the finite element software Ansys Workbench,the finite element model of the motion of the bump foil dynamic pressure gas bearing in the compressible fluid medium was established,and the fluid-structure coupling nu-merical simulation of the motion state of the bearing was carried out by using the 6DOF dynamic grid calculation method.The influence of different speed and bump foil structure parameters(length ratio,height and thickness of bump foil)on bearing performance was discussed.The simulation results show that the distribution of the bearing gas film pressure corre-sponds to the deformation of the flat foil,indicating that the proposed fluid-structure coupling method can effectively reflect the lubrication state of the bump foil dynamic pressure gas bearing.With the increase of rotational speed,the dynamic pres-sure effect of the bearing is enhanced continuously,the load-carrying capacity increases,and and the structural deformation of flat foil is increased,resulting in fluctuations in the convergence zone of gas film pressure.With the increase of the length ratio of the bump foil and the thickness of the bump foil,the load-carrying capacity increases rapidly at first and then be-comes stable,while the height of the bump foil has little effect on the load-carrying capacity,indicating that the load-car-rying capacity can be improved by increasing the length ratio of the bump foil and the thickness of the bump foil appropri-ately.
关键词
波箔动压气体轴承/流固耦合/波箔片结构参数/承载力Key words
bump foil dynamic pressure gas bearing/fluid-structure interaction/structural parameters of wave foil/load-carrying capacity引用本文复制引用
基金项目
国家自然科学基金(51475142)
河南省科技研发计划联合基金(225101610002)
出版年
2024
NETL
NSTL
万方数据