摘要
分离式波箔气体轴承是新一代柔性气体轴承,其承载能力的准确预测是该类轴承性能预测和设计准则确定的基础,箔片的变形和气膜压力的求解是承载能力预测的关键。分别采用线性刚度模型和薄板弯曲模型对分离波箔片和平箔片变形进行建模。应用非线性数值求解方法对可压缩气体Reynolds方程和变形方程进行气弹耦合数值求解,获得了轴承的压力分布。结果表明分离式波箔片可以提高轴承的承载能力,而平箔片的变形会导致承载能力的降低。通过比较发现计算结果和实验数据具有较好的一致性。
Separation-type bump foil bearing is a new type gas thrust bearing. The method of accurately predicting the load capacity of bump foil gas bearing is the basis on which its forecast and design principles are realized. The key of the prediction is to resolve foil deformation and pressure. Linear spring model and bending deformation equation of plate are used to calculate deformation of bump foil and top foil respectively. Gas pressure distribution is numerically solved by coupling through Reynolds equation and elastic de- formation equation. The result shows that the top foil deformation reduces load capacity, however the separation structure can in- crease load capacity. The numercal results show good agreement with experimental data.
出处
《机械制造与自动化》
2015年第2期4-6,共3页
Machine Building & Automation
关键词
气体动压推力轴承
分离波箔
静刚度
变形
承载能力
hydrodynamic thrust bearings
separation-type bump foil
static stiffness
deformation
load capacity
