汽车空调修正型线涡旋压缩机压缩腔模型特色

Model of compression chamber in scroll compressor with modified profile used in automobile-air-conditioning system

总结了任意圈数涡旋压缩机型线啮合压缩腔对数的取值方法。针对渐开线型线始端采用对称圆弧加直线修正的汽车空调涡旋压缩机,分析了修正型线啮合过程的特殊性,提出了次压缩腔和中心压缩腔轴向投影面积的计算方法并建立了数学模型。根据型线始端修正后涡旋壁厚不再随主轴转角变化的本质特征,提供了一种简明的中心压缩腔容积计算方法。所建立的压缩腔容积计算数学模型完善了对称圆弧加直线修正理论。在此基础上,可以进行修正角的最优化设计并能预测修正型线涡旋压缩机性能。

A method to select the number of compression chamber was summarized. As to scroll compressor with symmetrical circular arc plus line - shaped top profile used in automobile - air - conditioning system, the distinctiveness in mesh process be- tween fixed - scroll and orbiting - scroll was analyzed. According to the mesh feature, calculating methods to the second compres- sion chamber and the centre compression chamber were provided. So it was easy to set up math models of these compression cham- bers. Due to the feature that the wall thickness of top profile shaped by symmetrical circular arc plus line did not change anymore when crankshaft rotates, a concise idea was introduced in calculating the volume of centre compression chamber. These math models of volume calculation about compression chambers perfected the theory of symmetrical circular arc plus line - shaped top profile. Based on these models, it was possible to optimize the modified angle and to forecast the performance of scroll compressor designed. Keywords：Pyrology, Scroll compressor, Automobile- air- conditioning system, Symmetrical circular arc plus line-