Analysis of turbulent cavitation effects on water-lubricated bearing in single screw compressors

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL Industrial Lubrication and Tribology Pub Date : 2024-04-24 DOI:10.1108/ilt-01-2024-0029

Qingyang Wang, Weifeng Wu, Ping Zhang, Chengqiang Guo, Yifan Yang

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Abstract

Purpose

To guide the stable radius clearance choice of water-lubricated bearings for single screw compressors, this paper aims to analyze the effects of turbulence and cavitation on bearing performance under two conditions of specified external load and radius clearance.

Design/methodology/approach

A modified Reynolds equation considering turbulence and cavitation is adopted, based on the Jakobsson–Floberg–Olsson boundary condition, Ng–Pan model and turbulent factors. The equation is solved using the finite difference method and successive over-relaxation method to investigate the bearing performance.

Findings

The turbulent effect can increase the hydrodynamic pressure and cavitation. In addition, the turbulent effect can lead to an increase in the equilibrium radius clearance. The turbulent region exhibits a higher load capacity and cavitation rate. However, the increased cavitation negatively impacts the frictional coefficient and end flow rate. The impact of turbulence increases as the radius clearance decreases. As the rotating speed increases, the turbulence effect has a greater impact on the bearing characteristics.

Originality/value

The research can provide theoretical support for the design of water-lubricated journal bearings used in high-speed water-lubricated single screw compressors.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2024-0029/

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单螺杆压缩机中水润滑轴承的湍流气蚀效应分析

为了指导单螺杆压缩机水润滑轴承的稳定半径游隙选择，本文旨在分析在指定外载荷和半径游隙两种条件下湍流和气蚀对轴承性能的影响。设计/方法/途径基于 Jakobsson-Floberg-Olsson 边界条件、Ng-Pan 模型和湍流因子，采用了考虑湍流和气蚀的修正雷诺方程。采用有限差分法和连续超松弛法对方程进行求解，以研究轴承的性能。此外，湍流效应会导致平衡半径间隙增大。湍流区域显示出更高的承载能力和空化率。然而，气蚀的增加会对摩擦系数和末端流速产生负面影响。湍流的影响随着半径间隙的减小而增大。原创性/价值该研究可为高速水润滑单螺杆压缩机中使用的水润滑轴颈轴承的设计提供理论支持。同行评议本文的同行评议记录可在以下网站查阅：https://publons.com/publon/10.1108/ILT-01-2024-0029/。

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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.