Research on the cavitation characteristics and structural optimisation of spiral grooved thrust bearing lubricated by liquid hydrogen

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL Lubrication Science Pub Date : 2024-01-07 DOI:10.1002/ls.1690

Shaohang Yan, Tianwei Lai, Mingchen Qiang, Qi Zhao, Wenjing Ding, Yutao Liu, Yu Hou

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Abstract

In liquid hydrogen (LH₂) delivery, submersible centrifugal pump is an important device. Its reliability and efficiency rely on the stability of the bearings. In a high-speed range, cavitation occurs due to the hydrodynamic effect induced pressure undulation. Compared with other cryogenic fluids, cavitation in LH₂ is prone to happen due to its special properties. In this paper, a cavitation model considering thermal properties of LH₂ is proposed based on Rayleigh–Plesset equation. Cavitation characteristics are studied in spiral grooved thrust bearing (SGTB) lubricated by LH₂. The effect of cavitation on load capacity and friction torque are investigated. The most severely-eroded location is predicted by the distribution of mass transfer rate. The influence of bearing structure parameters is studied in respect of cavitation, load capacity and friction torque. The analysis of variance (ANOVA) and range analysis results may provide a reference for optimising LH₂ lubricated SGTB.

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液氢润滑螺旋槽推力轴承的气蚀特性和结构优化研究

在液氢（LH2）输送中，潜水离心泵是一种重要设备。其可靠性和效率取决于轴承的稳定性。在高速范围内，由于流体动力效应引起的压力起伏会产生气蚀。与其他低温液体相比，由于 LH2 的特殊性质，它很容易发生气蚀。本文基于 Rayleigh-Plesset 方程，提出了一个考虑到 LH2 热特性的空化模型。研究了用 LH2 润滑的螺旋槽推力轴承（SGTB）中的气蚀特性。研究了气蚀对承载能力和摩擦扭矩的影响。通过质量转移率的分布预测了侵蚀最严重的位置。研究了轴承结构参数对气蚀、承载能力和摩擦扭矩的影响。方差分析（ANOVA）和范围分析结果可为优化 LH2 润滑的 SGTB 提供参考。

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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.