| 摘要: |
| 采用气体轴承的主动耗气技术可以实现直线压缩机的无油润滑和非接触运行，以保证运行可靠性。为研究多孔质轴承的结构参数和压缩机设计参数对耗气量的影响，本文以R600a为制冷工质，建立了多孔质气体轴承模型，利用Fluent对耗气量进行了仿真模拟计算，基于该模型模拟分析了多孔质材料厚度、间隙气膜厚度、排气压力、压缩机频率和排量占比对气体轴承耗气量和耗气率的影响，并通过实验测试验证了该模型的准确性。结果表明：气体轴承耗气量的仿真结果和实验测量的误差在±15%以内。根据耗气率给出了最佳的设计参数组合，为直线压缩机用多孔质气体轴承优化设计提供了参考。 |
| 关键词: 直线压缩机 多孔质气体轴承 耗气量 气体润滑 |
| DOI： |
| 投稿时间：2021-01-12 修订日期：2021-03-12
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| 基金项目:国家自然科学基金（51976229）资助项目。 |
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| Simulation and Experimental Investigation on Porous Gas Bearings for Linear Compressor |
| Zou Huiming,Wang Yinglin,Tang Mingsheng,Li Xuan,Tang Xinbin |
| (Key Laboratory of Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, CAS;University of Chinese Academy of Sciences) |
| Abstract: |
| The active gas consumption technology of a gas bearing is adopted to realize oil-free lubrication and non-contact operation of a linear compressor to ensure the reliability of the compressor. To study the influence of the structural parameters of the porous bearings and the design parameters of the compressor on the gas consumption, this study used R600a as the refrigerating medium to establish a porous gas bearing model, and the gas consumption was simulated and calculated using FLUENT. The influence of the porous material thickness, thickness of the gas film, discharge pressure, operating frequency, and cooling capacity ratio on the gas consumption and gas consumption rate of the gas bearings was analyzed, and the accuracy of the model was verified through experimental tests. The results show that the error between the simulation result and the experimental measurement of gas bearing gas consumption is within ±15%. The optimal design parameter combination is given according to the gas consumption rate. This provides a reference for the optimization design of porous gas bearings for linear compressors. |
| Key words: linear compressor porous gas bearing gas consumption gas lubrication |
