涡旋压缩机不对称双涡旋齿型线的构建与模拟

采用双涡旋齿涡旋盘结构能够有效地提高涡旋压缩机的吸气量,然而存在内容积比小、允许开设的排气口面积小的缺点。针对此问题,本文提出一种涡旋压缩机的新型不对称双涡旋齿,利用中线法得到了涡旋齿型线的设计方法,并且建立其几何模型;通过三维数值模拟研究其工作腔内部的气体流场,并与现有的双涡旋齿涡旋压缩机进行对比。结果表明:所提出的涡旋压缩机的新型不对称双涡旋齿能够有效地提高涡旋压缩机的排气量和内容积比,并且增大了排气口的开设面积,使得压缩机具有更好的工作性能。

Construction and Simulation of an Asymmetric Twin-Wrap Profile for Scroll Compressors

The twin-wrap scroll structure can effectively increase the suction flowrate of the scroll compressor,but it also has shortcomings such as a small internal volume ratio and a small area for designing the discharge port.With the aim of solving this problem,a new type of asymmetric twin-wrap for the scroll compressor is proposed in this study.A design method for generating twin-wrap profiles is obtained based on the midline method,and its geometric model is also established.The gas flow field in working chambers of this twin-wrap is studied by using three dimensional numerical simulations,and its internal flow field is compared with that of the existing twin-wrap scroll compressor.The results show that the proposed asymmetric twin-wrap can effectively increase the discharge volume and internal volume ratio,and enlarge the area for designing the discharge port:so that the corresponding scroll compressor has better working performance.