| 往复式茶叶振动抖筛机优化设计与试验 |
| |
| 引用本文： | 王小勇,余志,倪德江.往复式茶叶振动抖筛机优化设计与试验[J].农业机械学报,2023,54(9):143-153. |
| |
| 作者姓名： | 王小勇 余志 倪德江 |
| |
| 作者单位： | 华中农业大学 |
| |
| 基金项目： | 国家重点研发计划项目（2021YFD1000401） |
| |
| 摘 要： | 抖筛是茶叶精制的重要环节，直接影响茶坯的净度，针对茶叶抖筛过程中抖筛机理(清筛)不清晰而导致抖筛过程中存在茶叶断碎以及挂网等问题，本文研究茶叶在筛床上的抖筛规律，建立茶叶颗粒沿筛床上下运动、离开筛面被抛起运动和落到筛孔后碰撞运动三段筛分过程的动力学模型。结合茶叶在筛床上的抖筛规律，通过EDEM建立茶叶筛床的仿真模型，对茶叶在筛床上的速度与受力进行分析，确定筛床曲柄转速、筛面倾斜角和曲柄半径的最佳参数。最后通过三因素三水平的正交试验，确定实际筛分情况下的最优参数与得出各个因素对误筛率和生产率的影响由大到小为筛面倾斜角、曲柄转速、曲柄半径。试验结果表明，当曲柄转速为247.99 r/min、筛面倾斜角为2.60°、曲柄半径为23.11 mm时，误筛率和生产率分别为5.3%和440 kg/(m2·h),与优化结果误差在允许范围内。
|
| 关 键 词： | 茶叶抖筛机 筛分机理 EDEM 正交试验 |
| 收稿时间： | 2023/3/7 0:00:00 |
Optimization Design and Experiment of Reciprocating Tea Vibrating-sifting Machine |
| |
| WANG Xiaoyong,YU Zhi,NI Dejiang.Optimization Design and Experiment of Reciprocating Tea Vibrating-sifting Machine[J].Transactions of the Chinese Society of Agricultural Machinery,2023,54(9):143-153. |
| |
| Authors: | WANG Xiaoyong YU Zhi NI Dejiang |
| |
| Institution: | Huazhong Agricultural University |
| |
| Abstract: | Tea is a kind of global beverage, the mechanized tea refining operation is an important part of the entire tea mechanization process. Vibrating-sifting is an integral part of tea refining, which directly affects the purity of tea. In view of the unclear mechanism of vibrating-sifting in the process of tea vibrating-sifting, there are problems such as broken tea and hanging mesh, which affect the vibrating-sifting efficiency. The motion law of tea on the screen bed was researched, the dynamic model of the three-stage screening process of tea moving up and down along the screen bed was established, which was thrown up from the screen surface and colliding after falling to the screen hole, combined the motion law of tea on the screen bed, a simulation model of tea screen bed was established through EDEM, and the speed and force of tea on the screen bed were analyzed. The best parameters were crank radius, rotating speed of the crank and the inclined angle of the screen surface. Finally, through the orthogonal test of three factors and three levels, the software Design-Expert was used to analyze and optimize the experimental data and determine the optimal parameters. The significance order of each factor on the error screening rate and productivity was obtained. The order of significance for the error-sifting rate was the inclination angle of sifting bed, crank speed and crank radius, while the significant order of the productivity was the inclination angle of sifting bed, crank speed and crank radius. When the crank speed was 247.99r/min, the inclination angle of the sieve bed was 2.60°, the crank radius was 23.11mm, the error screening rate and productivity were 5.3% and 440kg/(m2·h), respectively, compared with the optimization result, the error was within the allowable range. The research result had a significant reference value for improving the screening efficiency of vibrating-shifting machine for tea. |
| |
| Keywords: | tea vibrating-sifting machine vibrating-sifting mechanism EDEM orthogonal test |
|
| 点击此处可从《农业机械学报》浏览原始摘要信息 |
| 点击此处可从《农业机械学报》下载免费的PDF全文 |
|
