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Design guidelines for bump-type compliant conical foil bearing
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science ( IF 2 ) Pub Date : 2021-11-29 , DOI: 10.1177/09544062211012730
Hongyang Hu 1 , Ming Feng 1
Affiliation  

The integral bump foil strip cannot optimize the performance for the compliant conical foil bearing (CFB) as the uneven distribution of structural stiffness. To maximize the bearing characteristics, this paper proposed different bump foil schemes. Firstly, the anisotropy of CFB was studied based on the nonlinear bump stiffness model, and the circumferentially separated foil structure was proposed. Moreover, an axially separated bump foil structure with the variable bump length was introduced to make the axial stiffness distribution more compliant with the gas pressure. In addition, the effect of foil thickness was also discussed. The results show that CFB with integral bump foil exhibits obvious anisotropy, and the suggested installation angle for largest load capacity and best dynamic stability are in the opposite position. Fortunately, a circumferential separated bump foil can improve this defect. The characteristics of CFB with axial separated foil structure can be improved significantly, especially for that with more strips and the variable bump half-length design. The suitable bump and top foil thickness should be set considering the improved supporting performance and proper flexibility. The results can give some guidelines for the design of CFB.



中文翻译:

凹凸型柔性圆锥箔轴承的设计指南

由于结构刚度分布不均,整体凸箔带无法优化柔顺锥形箔轴承 (CFB) 的性能。为了最大限度地发挥轴承特性,本文提出了不同的凸箔方案。首先,基于非线性凹凸刚度模型研究了CFB的各向异性,提出了周向分离的箔片结构。此外,引入了具有可变凸块长度的轴向分离凸块箔结构,使轴向刚度分布更符合气体压力。此外,还讨论了箔厚度的影响。结果表明,带整体凸箔的CFB表现出明显的各向异性,最大承载能力和最佳动态稳定性的建议安装角度相反。幸运的是,周向分离的凸箔可以改善这种缺陷。具有轴向分离箔结构的CFB的特性可以得到显着改善,特别是对于具有更多条带和可变凸块半长设计的CFB。应考虑改进的支撑性能和适当的柔韧性来设置合适的凸点和顶箔厚度。结果可以为CFB的设计提供一些指导。

更新日期:2021-11-30
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