| 魏娟,王强,杨国锋,王关,贾智旗,任玉斌.基于DEM-CFD耦合的气吸式酸枣捡拾装置的优化设计[J].干旱地区农业研究,2022,40(4):265~271 |
| 基于DEM-CFD耦合的气吸式酸枣捡拾装置的优化设计 |
| Design optimization of an air\|suction sour jujube picking up device based on DEM-CFD coupling |
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| DOI：10.7606/j.issn.1000-7601.2022.04.30 |
| 中文关键词: 气吸式捡拾装置 酸枣 点云数据 气固耦合仿真 响应面分析 |
| 英文关键词:suction pickup device sour jujube point cloud data gas\|solid coupling simulation response surface analysis |
| 基金项目: |
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| 中文摘要: |
| 针对目前酸枣的收获主要依赖人工的问题，研究一种气吸式酸枣捡拾机械装置。分析酸枣的物理特性，计算酸枣的悬浮速度、流体域压降变化，通过逆向技术、三维图像重建获取酸枣的点云数据，并对酸枣的点云数据进行降噪处理，建立酸枣三维模型。通过Edem-Fluent气固耦合软件对酸枣吸拾过程进行仿真分析，获取管径、流量、酸枣速度、接触力等参数，利用响应面分析对参数进行优化,并研制酸枣捡拾机进行试验。分析表明,流量是影响捡拾效率的主要因素，管径是影响酸枣破损的主要因素，仿真结果和试验表明气吸式酸枣捡拾装置最佳管径0.11 m，最佳流量0.28 m3·s-1。该装置能降低酸枣采收成本，缩短酸枣采收周期，同时提高捡拾效率。 |
| 英文摘要: |
| To solve the problem that the harvest of sour jujube mainly depends on artificial work, a type of pneumatic picking up machine for sour jujube was studied. The physical characteristics of sour jujube were analyzed. The suspension speed of sour jujube and the change of pressure drop in fluid domain were calculated. The point cloud data of sour jujube obtained by 3d image reconstruction through reverse technology were de\|noised, and the three\|dimensional model of sour jujube was established. Edem\|fluent gas\|solid coupling software was used to simulate and analyze the picking process of sour jujube, and the parameters such as pipe diameter, flow rate, sour jujube speed and contact force were obtained, and the parameters were optimized by response surface analysis for the manufacture of jujube pickup machine experiments. Air velocity was the main factor affecting the picking efficiency, and pipe diameter was the main factor affecting the damage of jujube. The tube diameter was the main factor affecting the damage of sour jujube. The simulation results and experiments showed that the best tube diameter and flow rate of the air\|suction picking device were 0.11m and 0.28 m3·s-1 respectively. The device not only reduced the cost of harvesting sour jujube, shortened the cycle of harvesting sour jujube, but also improved the efficiency of picking up. |
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