Analysis of the impact of graphene nano-lubricating oil on thermal performance of hydrostatic bearing

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL Industrial Lubrication and Tribology Pub Date : 2024-04-30 DOI:10.1108/ilt-12-2023-0388

Dongju Chen, Yupeng Zhao, Kun Sun, Ri Pan, Jinwei Fan

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Abstract

Purpose

To enhance the performance of hydrostatic bearings, graphene serves as a lubricant additive. Using the high thermal conductivity of graphene, the purpose of this study is to focus on the impact of graphene nano-lubricating oil hydrostatic bearing temperature rise at various speeds and eccentricities.

Design/methodology/approach

The thermal conductivity of graphene nano-lubricating oil was calculated by molecular dynamics method and based on the viscosity–temperature effect, the coupled heat transfer finite element model of hydrostatic bearing was established; temperature rise of pure lubricating oil and graphene nano-lubricating oil hydrostatic bearing were analysed at different speed and eccentricity based on computational fluid dynamics method.

Findings

With the increase of speed and eccentricity, the temperature rise of 0.2% graphene nano-lubricating oil bearings is lower than that of pure lubricating oil bearings; in addition with the increase of graphene mass fraction, the temperature rise of graphene nano-lubricating oil bearings is always higher than that of pure lubricating oil bearings, and the higher the speed, the more obvious the phenomenon.

Originality/value

The effects of graphene as a lubricant additive on the thermal conductivity of nano-lubricating oil and the variation of the temperature rise of graphene nano-lubricating oil bearings compared to pure lubricating oil bearings were analysed by combining micro and macro methods.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2023-0388

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石墨烯纳米润滑油对静压轴承热性能的影响分析

目的为提高静压轴承的性能，石墨烯可用作润滑油添加剂。本研究利用石墨烯的高导热性，重点研究石墨烯纳米润滑油在不同转速和偏心率下对静压轴承温升的影响。设计/方法/途径采用分子动力学方法计算了石墨烯纳米润滑油的导热系数，并基于粘温效应建立了静压轴承的耦合传热有限元模型；基于计算流体动力学方法分析了纯润滑油和石墨烯纳米润滑油静压轴承在不同速度和偏心率下的温升。随着转速和偏心率的增加，0.2%石墨烯纳米润滑油轴承的温升低于纯润滑油轴承；此外，随着石墨烯质量分数的增加，石墨烯纳米润滑油轴承的温升始终高于纯润滑油轴承，且转速越高，该现象越明显。独创性/价值通过微观和宏观相结合的方法，分析了石墨烯作为润滑油添加剂对纳米润滑油导热性的影响，以及石墨烯纳米润滑油轴承与纯润滑油轴承相比的温升变化。同行评议本文的同行评议历史见：https://publons.com/publon/10.1108/ILT-12-2023-0388。

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来源期刊

Industrial Lubrication and Tribology 工程技术-工程：机械

CiteScore

3.00

自引率

18.80%

发文量

129

审稿时长

1.9 months

期刊介绍： Industrial Lubrication and Tribology provides a broad coverage of the materials and techniques employed in tribology. It contains a firm technical news element which brings together and promotes best practice in the three disciplines of tribology, which comprise lubrication, wear and friction. ILT also follows the progress of research into advanced lubricants, bearings, seals, gears and related machinery parts, as well as materials selection. A double-blind peer review process involving the editor and other subject experts ensures the content''s validity and relevance.