涡旋压缩机油气两相流切向泄漏特性研究

Research on Tangential Leakage Characteristics of Oil and Gas Two-phase Flow in Scroll Compressor

针对涡旋压缩机工作时产生的油气两相泄漏流,建立单个流体域模型,采用Fluent软件通过数值模拟的方法,研究了当压差、油气质量百分比、间隙宽度及齿侧表面粗糙度不同时,油气两相流切向泄漏的变化规律。结果表明:压差和间隙宽度是引起涡旋压缩机切向泄漏量增大的主要因素,且随着压差和间隙宽度的增大,切向质量泄漏量增大;一定条件下,当增大油气质量百分比和齿侧表面粗糙度时,切向质量泄漏量逐渐减小,且当油气质量百分比为12%、齿侧表面粗糙度Ra为1.6μm时,切向质量泄漏量最小。该研究可为涡旋压缩机密封的优化设计提供依据。

A single fluid domain model was established for the two-phase leakage flow of oil and gas generated when the scroll compressor was working,and the Fluent software was used to numerically simulate the variation law of tangential leakage of oil and gas two-phase flow when the pressure difference,oil gas mass percentage,gap width,and tooth surface roughness were different.The results show that the pressure difference and the gap width are the main factors causing the increase of the tangential leakage of scroll compressor,and with the increase of pressure difference and gap width,the tangential mass leakage increases,and when the increase of mass percentage of oil and gas and the surface roughness of tooth sidewall under certain conditions,the tangential mass leakage gradually decreases,and when the oil and gas mass percentage is 12%and the surface roughness Ra of tooth sidewall surface is 1.6um,the tangential mass leakage is the smallest.The study can provide a basis for the optimal design of scroll compressor seals.