一种变截面涡旋压缩机型线的构建与性能研究OA北大核心CSTPCD

For the problems such as complex design process and difficult processing caused by different types of curves and the introduction of high-order curves in traditional variable cross-section profile design,a profile design method using acceleration spirals instead of high-order curves was proposed.Based on this method,a variable cross-section profile with an acceleration spiral as the main scroll profile was constructed,and the basic geometric theory of the profile was established,the variation law of the working chamber volume was studied,and the dynamic changes of axial and tangential gas force with the spindle angle were obtained.The results indicate that variable cross-section profile constructed using the same type of curve not only compensates for the shortcomings of traditional variable cross-section profiles,but also has more advantages in terms of volumetric and mechanical performance.Under the same design parameters,compared with the traditional variable cross-section profile formed by high-order curves,the suction volume and compression ratio is increased by 39.51%and 11.54%,respectively,while the maximum axial gas force and tangential gas force are decreased by 11.06%and 8.58%,respectively.The research results have certain reference value for simplifying the design of variable cross-section profiles and reducing processing difficulty.