Investigations of the Bump Foil Bearing with Thick Top Foil Based on Contact Mechanics

IF 2.2 3区 工程技术 Q2 ENGINEERING, MECHANICAL
Jie Li, Changlin Li, Jia-min Du
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引用次数: 2

Abstract

Traditional bump foil bearing, though widely used, is considered to have the problem of inadequate load capacity due to the effect of foil sag between adjacent bumps. In this paper, the thick top foil is applied to cope with the heavy load conditions, which has one order of magnitude larger top foil thickness than traditional top foil. Thick plate and curve shell models are developed to calculate the load carrying performance of thick top foil bearing based on contact mechanics, and the sag ratio is introduced to describe the degree of foil sag and estimate the bearing load capacity. The impacts of top foil thickness on the stiffness of bearings in different sizes as well on the adaptability to rotor tilt are discussed. The results indicate that the thick top foil (tt=2mm) bearing performs a nearly 100% enhanced load capacity at small gas film thickness whether rotor tilts or not. Thick top foil will increase the bearing stiffness of small size (d=35 mm) and tends to has little influence on large size bearing stiffness (d=70 mm).
基于接触力学的厚顶箔碰撞箔轴承研究
传统的凸块箔片轴承虽然应用广泛,但由于相邻凸块之间箔片凹陷的影响,被认为存在承载能力不足的问题。本文应用厚顶箔来应对重载条件,其顶箔厚度比传统的顶箔厚度大一个数量级。基于接触力学,建立了厚板和曲壳模型来计算厚顶箔片轴承的承载性能,并引入弧垂比来描述箔片的弧垂程度和估计轴承的承载能力。讨论了顶部箔片厚度对不同尺寸轴承刚度以及对转子倾斜适应性的影响。结果表明,无论转子是否倾斜,厚顶箔(tt=2mm)轴承在小气膜厚度下的承载能力都能提高近100%。厚的顶部箔片将增加小尺寸(d=35mm)的轴承刚度,并且往往对大尺寸轴承刚度(d=70mm)几乎没有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Tribology-transactions of The Asme
Journal of Tribology-transactions of The Asme 工程技术-工程:机械
CiteScore
4.20
自引率
12.00%
发文量
117
审稿时长
4.1 months
期刊介绍: The Journal of Tribology publishes over 100 outstanding technical articles of permanent interest to the tribology community annually and attracts articles by tribologists from around the world. The journal features a mix of experimental, numerical, and theoretical articles dealing with all aspects of the field. In addition to being of interest to engineers and other scientists doing research in the field, the Journal is also of great importance to engineers who design or use mechanical components such as bearings, gears, seals, magnetic recording heads and disks, or prosthetic joints, or who are involved with manufacturing processes. Scope: Friction and wear; Fluid film lubrication; Elastohydrodynamic lubrication; Surface properties and characterization; Contact mechanics; Magnetic recordings; Tribological systems; Seals; Bearing design and technology; Gears; Metalworking; Lubricants; Artificial joints
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