Study on the friction characteristics of a self-lubricating linear compressor using vapor injection

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-22 DOI:10.1016/j.ijrefrig.2024.10.014

Shuo Zhang , Huiming Zou , Mingsheng Tang , Fanchen Kong , Wencong Shao , Zhouhang Hu

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Abstract

The self-lubricating linear compressor with aerostatic bearings has good prospect for the scenario which has difficulties of oil returning. This study presents a novel oil-free linear compressor and establishes a frictional damping model by using equivalent circuit approach to evaluate the mechanical performance of the compressor. The changes in friction damping characteristics of VISLLC under different piston strokes and injection pressure are analyzed. The flow resistance coefficients within the porous medium and gas gap are obtained by experimental tests and modeling analysis. Simulation results indicate that the equivalent frictional damping coefficient can be reduced by 36.1 % comparing with that of the non-injection and the efficiency can improved the by 17.2 %. The frictional damping coefficient in the porous bearing thickness of 0.9 mm at 600 kPa injection pressure is 3.64 N·s·m⁻¹.

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利用喷气技术研究自润滑线性压缩机的摩擦特性

采用空气静压轴承的自润滑线性压缩机在回油困难的情况下具有良好的应用前景。本研究提出了一种新型无油线性压缩机，并利用等效电路方法建立了摩擦阻尼模型，以评估压缩机的机械性能。分析了不同活塞冲程和喷油压力下 VISLLC 摩擦阻尼特性的变化。通过实验测试和建模分析获得了多孔介质和气体间隙内的流动阻力系数。模拟结果表明，等效摩擦阻尼系数比不喷射时降低了 36.1%，效率提高了 17.2%。在 600 kPa 注入压力下，厚度为 0.9 mm 的多孔轴承的摩擦阻尼系数为 3.64 N-s-m-1。

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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.