基于迅速分级原理的涡流选粉机分级区研究  

Research on Classifying Zone of Vortex Air Classifier Based on Rapid Classification Principle

作　　者：李双跃[1] 李进春[1] 任朝富[2] 李洪[1] 

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010 [2]绵阳西金科技发展有限公司技术中心,四川绵阳621000

出　　处：《中国粉体技术》2009年第5期11-15,共5页China Powder Science and Technology

基　　金：国家科技支撑计划项目;编号:2006BAF02A24;西南科技大学博士基金(072X0113)

摘　　要：通过分析涡流选粉机转子周围自由涡对分级过程的影响,应用迅速分级原理设计具有异形导流结构的分级区域,使进入分级区域的气流速度与转子外边缘线速度相当,消除自由涡对颗粒的干扰,颗粒可迅速进入转子叶片间的强制涡流区参与分级,实现迅速分级,减少颗粒在分级区域内的滞留时间以减少团聚。并采用RSM应力方程模型和随机颗粒轨道模型对该分级区域进行气固两相数值模拟,确定实现迅速分级的最优参数。试验表明,装有该异形导流结构的分级区有利于提高分级精度和分级效率。The influence of classifying process by flee vortex around the cage rotor was analyzed, and the classification zone with special-shaped air-flow guidance was designed according to rapid classification principle, making sure that air velocity inlet to the classification zone was approximately the same as the velocity of the tip of rotor. The influence of particle traces by flee vortex was eliminated, and the particles entered into the force vortex between rotor vanes rapidly and were classified, so the rapid classification was achieved. In the condition of rapid classification, the particles residence time in the classification zone was reduced and the agglomeration of particles was decreased. Then the numerical simulation of air-solid two-phase in the classification zone was carried on by RSM model and particle trace model ,and the optimal parameters of rapid classification were determined. The experimental results showed that the classification zone with this special-shaped air-flow guidance was propitious to improve classification precision and efficiency.

关 键 词：涡流选粉机 分级 自由涡 导流结构 

分 类 号：TB44[一般工业技术]