Study on the oil supply characteristics of R290 rotary compressors under high-speed conditions

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-06-03 DOI:10.1016/j.ijrefrig.2025.06.002

Jie Lin , Ran Zhang , Che Wang , Jianhua Wu , Liangyou Zhu

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引用次数: 0

Abstract

To minimize the charge of flammable refrigerants in air conditioning systems, there is an increasing trend towards the miniaturization and high-speed operation of rotary compressors. However, the oil supply behavior of rotary compressors under high-speed conditions remains unclear. This study conducts a numerical investigation into the oil supply characteristics of high back-pressure R290 rotary compressors at elevated rotational speeds. A comprehensive simulation model of the oil supply system was developed, integrating both stationary and rotating regions and employing the volume of fluid (VOF) method. Experimental validation confirmed a deviation of less than 4 % between the simulated and measured results. The study systematically examines the effects of factors such as rotational speed, refrigerant type, and gas hole direction on the oil supply performance under high-speed conditions. Results revealed that with increasing rotational speed, the oil supply through the spiral groove increased linearly, and the oil film in the central hole of the crankshaft became thinner. Additionally, compressors using R290 exhibited a lower oil supply rate compared with those utilizing R134a, primarily due to the lower gas density of R290. Crankshafts featuring radial gas holes demonstrated superior oil supply efficiency compared with those with axial outlets. This study offers valuable theoretical insights for optimizing oil supply systems in high-speed rotary compressors, contributing to the advancement of their design and performance.

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R290旋转压缩机高速工况供油特性研究

为了最大限度地减少空调系统中可燃制冷剂的充注量，旋转压缩机的小型化和高速运行成为日益增长的趋势。然而，旋转压缩机在高速工况下的供油行为尚不清楚。本文对高背压R290旋转压缩机在高转速下的供油特性进行了数值研究。采用流体体积（VOF）方法，建立了稳定区和旋转区相结合的供油系统综合仿真模型。实验验证证实，模拟结果与测量结果之间的偏差小于4%。本研究系统考察了转速、制冷剂类型、气孔方向等因素对高速工况下供油性能的影响。结果表明：随着转速的增加，通过螺旋槽的供油量线性增加，曲轴中心孔的油膜变薄；此外，与使用R134a的压缩机相比，使用R290的压缩机表现出更低的供油率，主要是由于R290的气体密度较低。径向气孔曲轴的供油效率优于轴向气孔曲轴。该研究为优化高速旋转压缩机供油系统提供了有价值的理论见解，有助于提高高速旋转压缩机的设计和性能。

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

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.