The influence of local wear and contact roughness on mixed lubrication of marine stern bearing with misaligned shaft

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL

Lubrication Science Pub Date : 2023-05-02 DOI:10.1002/ls.1655

Zeyu Zhao, Qianwen Huang, Minghui Sheng

引用次数: 1

Abstract

The marine stern bearing provides supporting force by lubricating film to minimise the contact friction with the propeller shaft. A model considers local wear and asperity contact is proposed to investigate the mixed lubrication of bearing with misalignment. The finite difference method and over-relaxation iteration method are employed to solve the average Reynolds equation. The lubrication behaviour includes hydrodynamic pressure, film thickness, contact force and friction coefficient were calculated. The influence of sliding speed, local wear, contact roughness, misalignment angle, elastic deformation and eccentricity ratio is discussed in detail. The critical speed from mixed lubrication to fluid lubrication is obtained by employing the Stribeck curve. Moreover, the dimensionless average hydrodynamic pressure, film thickness and the peak value of contact force are compared.

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局部磨损和接触粗糙度对轴不对中船舶尾轴轴承混合润滑的影响

船用船尾轴承通过润滑膜提供支撑力，以最大限度地减少与传动轴的接触摩擦。提出了一个考虑局部磨损和粗糙面接触的模型来研究轴承失准时的混合润滑问题。采用有限差分法和过松弛迭代法求解平均雷诺方程。计算了润滑性能，包括动压、油膜厚度、接触力和摩擦系数。详细讨论了滑动速度、局部磨损、接触粗糙度、错位角、弹性变形和偏心率等因素的影响。利用斯特里贝克曲线求出了从混合润滑到流体润滑的临界速度。此外，还比较了无量纲平均流体动压、薄膜厚度和接触力峰值。

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

Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

10.50%

发文量

审稿时长

6.8 months

期刊介绍： Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.