• CN：11-2187/TH
• ISSN：0577-6686

• 交叉与前沿 •

### 涡旋压缩机径向迷宫密封中泄漏气体气动热力行为研究

1. 1.兰州理工大学石油化工学院 兰州 730050;
2.兰州理工大学温州泵阀工程研究院 温州 325105
• 出版日期:2015-10-15 发布日期:2015-10-15
• 基金资助:
国家自然科学基金(51265026，51265027)和浙江省自然科学基金(Y1080079)资助项目

### Research on Gas Leakage Pneumatic Thermodynamic Behavior in the Radial Labyrinth of Scroll Compressor

LIU Xingwang1,2, ZHANG Guanzheng1, LI Chao1, ZHAO Man1

1. 1.School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050;
2.Wenzhou Research Institute of Pump and Valve, Lanzhou University of Technology, Wenzhou 325105
• Online:2015-10-15 Published:2015-10-15

Abstract: The scroll compressor’s radial labyrinth sealing is regarded as the research object, by using the macro energy method and the theory of viscous flow, the leakage for the sealing structure are calculated, to find aerodynamic and thermodynamic behavior of gas leakage. A comparison is made between experimental results and theoretical predictions. Assuming that there is no ventilation effect and the gas do isobaric and isothermal recovery in the labyrinth groove, the mathematical equation of leakage is established; while considering the ventilation effect and non isobaric isothermal recovery, by using thermodynamic equation and the theory of viscous flow, discriminant for judging whether ventilation flow comes up to speed of sound is deduced, and the algorithm to calculate critical velocity, critical density and leakage is proposed. The different between experimental results and theoretical predictions of leakage is analyzed. The result indicates that leakage process in straight through labyrinth sealing is expansion process accompanied with absorption of heat. The thermodynamics index decrease obviously with the increase of the pressure differences of two adjoining pressure chamber, and the leakages is composed of ventilation flow and 2D Poiseuille between in adjoining labyrinth groove, ventilation effect become also clearer with the increase of the pressure differences. The algorithm with theory of viscous flow for leakage has high computational precision.