REN Wei, GAO Aimin, WANG Changde, WANG Hongsong, LIU Long

(College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

Abstract: In order to improve the particle mixing effects of the vertical cone mixer, a new type of spiral band paddle structure with dislocation broken belt was designed. The particle mixing process of two types of spiral blade structures, namely dislocation broken belt type and continuous belt type were studied by numerical simulation method. The influence of dislocation distance, dislocation height and pitch ratio of the upper and lower paddle of spiral blade with dislocation broken belt type on the mixing effect were discussed. The correctness of the simulation results was verified through experiments. The results show that the average mixing indexes of particles in the mixers with dislocation broken belt and continuous spiral belt paddle structures calculated according to the experimental results are 0.922 and 0.861 respectively, while the average mixing indexes calculated according to the simulation results are 0.985 and 0.941 respectively. The experimental results are lower than the simulation results, but the mixing effect of the dislocation broken belt spiral belt paddle structure is better. Dislocation broken belt type can enhance the convection process of particles and improve the mixing effect of particles. Increasing the dislocation distance has no obvious influence on the mixing effect. When the dislocation height is 30, 60 and 90 mm, the particles will be completely mixed when the mixing time is 7, 7 and 8 s respectively. When the pitch ratio is 1, the mixing effect is the best.

Keywords: vertical cone mixer； dislocation broken belt type； spiral band paddle structure； numerical simulation; particle mixing effect

Received： 2022-06-14，Revised:2022-11-03，Online：2022-12-02 09:47。

Funding Project：甘肃省自然科学基金项目，编号：21JR7RA817；甘肃省教育厅产业支撑计划项目，编号：2021CYZC-39。

First Author：任伟(1993—)，男，硕士研究生，研究方向为机械装备。E-mail： 2664045362@qq.com。

Corresponding Author：高爱民(1981—)，男，副教授，博士，硕士生导师，研究方向为农业工程技术与装备。E-mail： gaoaimin@gsau.edu.cn。