研究了超微粉涡轮分级机性能分析的数学模型 ,建立了涡轮分级流场速度分布模型 ,推导了涡轮分级颗粒粒径公式。在此基础上分析了涡轮结构参数、风量和转速与分级粒径及分级精度的关系 ,实验结果表明 ,根据分级机结构参数和运行参数的关系改进设计后的收集系统 ,分级机收集效率大为提高。 The mathematical model of performance analysis of superfine powder turbo classifier is studied. The model of velocity distribution of turbo classifying flow field is established and the formula of grading particle size of turbine is deduced. On this basis, the relationship between turbine structure parameters, air volume and speed, grading size and classification accuracy is analyzed. The experimental results show that the collection system is improved according to the relationship between structural parameters and operating parameters of classifier, improve.