Effect of bearing shell deformation and ER fluid behavior on two-lobed slot-entry hybrid journal bearing

IF 1.6 3区工程技术 Q3 ENGINEERING, MECHANICAL Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-11-13 DOI:10.1177/13506501231213774

Krishnkant Sahu, Satish C. Sharma, Adesh Kumar Tomar

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Abstract

The present article deals with the effects of deformable bearing shells on the performance of lobed slot-entry hybrid journal bearing systems. The influence of the deformation coefficient [Formula: see text] has been studied using the thin liner elasticity model, which measures the flexibility of the bearing liner. Recently, smart fluid, that is, electrorheological (ER) fluid has been used in various tribological systems to obtain better performance. Therefore, the influence of ER lubricant on the bearing performance characteristics has also been studied in this work. Bingham model constitutive relation has been used to analyze the non-Newtonian behavior of ER fluid. The performance of fluid film bearings is greatly influenced by the noncircularity of the bearings. Therefore, the behavior of deformable bearing shells in a slot-entry journal bearing for lobed conditions has also been studied in the present study. The results reveal that considering deformation in the bearing shell reduces the value of frictional torque, whereas the value of stiffness coefficients and stability threshold speed increases. However, ER lubricant enhances the value of film thickness, stiffness/damping coefficients, and stability threshold speed margin.

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轴承壳变形和ER流体行为对两叶槽式混合式滑动轴承的影响

本文研究了可变形轴承壳对分叶槽入口混合式滑动轴承系统性能的影响。采用测量轴承衬套弹性的薄衬套弹性模型，研究了变形系数[公式:见文]的影响。近年来，智能流体，即电流变流体(ER)已被用于各种摩擦学系统，以获得更好的性能。因此，本工作还研究了ER润滑剂对轴承性能特性的影响。采用Bingham模型本构关系分析了ER流体的非牛顿行为。流体膜轴承的性能受轴承的非圆度影响很大。因此，本文还研究了裂片条件下槽入口滑动轴承变形轴瓦的行为。结果表明:考虑轴承壳变形使摩擦转矩减小，而刚度系数和稳定阈值速度增大;然而，ER润滑剂提高了膜厚、刚度/阻尼系数和稳定阈值速度裕度的值。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 工程技术-工程：机械

CiteScore

4.20

自引率

5.00%

发文量

110

审稿时长

6.1 months

期刊介绍： The Journal of Engineering Tribology publishes high-quality, peer-reviewed papers from academia and industry worldwide on the engineering science associated with tribology and its applications. "I am proud to say that I have been part of the tribology research community for almost 20 years. That community has always seemed to me to be highly active, progressive, and closely knit. The conferences are well attended and are characterised by a warmth and friendliness that transcends national boundaries. I see Part J as being an important part of that community, giving us an outlet to publish and promote our scholarly activities. I very much look forward to my term of office as editor of your Journal. I hope you will continue to submit papers, help out with reviewing, and most importantly to read and talk about the work you will find there." Professor Rob Dwyer-Joyce, Sheffield University, UK This journal is a member of the Committee on Publication Ethics (COPE).