基于CFD的微型无油滚动转子压缩机泄漏分析和结构优化

Leakage Analysis and Structural Optimization of Oil-free Miniature Rolling Piston Compressor Based on CFD

采用CFD仿真软件PumpLinx,对应用于300W冷量的微型制冷系统中的滚动转子压缩机的工作过程进行仿真,在保证排量不变的情况下,通过改变微型滚动转子压缩机的偏心率和相对气缸长度,探讨微型滚动转子压缩机容积效率、等熵效率的变化规律,寻找微型滚动转子压缩机最佳设计结构参数的取值范围,为微型无油滚动转子压缩机的设计提供参考。研究结果表明:压缩机的容积效率和等熵效率随偏心量的增大而减小,针对研究的2cm3的压缩机,偏心率为0.24左右时可获得较好的容积效率和等熵效率。考虑到尽可能缩小气缸尺寸,微型无油滚动转子压缩机的相对气缸长度可以控制在0.5左右。

Using the CFD simulation software PumpLinx,the working process of the rolling piston compressor in the micro refrigeration system with 300W cooling capacity is simulated.Under the condition that the displacement is unchanged,by changing the eccentricity and the relative cylinder length of the miniature rolling piston compressor,the variation law of the Volumetric efficiency and isentropic efficiency of the miniature rolling piston compressor is discussed,and the value range of the optimal design structural parameters of the miniature rolling piston compressor is found,Provide reference for the design of oil-free miniature rolling piston compressor.The research results show that the Volumetric efficiency and isentropic efficiency of the compressor decrease with the increase of eccentricity.For the 2cm3 compressor studied in this paper,when the eccentricity is about 0.24,better Volumetric efficiency and isentropic efficiency can be obtained.Considering minimizing the cylinder size as much as possible,the relative cylinder length of the oil-free miniature rolling piston compressor can be controlled at around 0.5.