| 颗粒与壁面间滚动摩擦对进料装置颗粒流动特性的影响 |
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| 作者姓名： | 邰曈 王彪 唐天琪 何玉荣 |
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| 作者单位： | 哈尔滨工业大学能源科学与工程学院, 哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金重大研究计划培育项目（91534112）资助 |
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| 摘 要： | 3D打印是一种革命性的数字化生产模式。针对应用于熔融沉积成型打印机进料的一种螺杆挤出装置，基于离散单元法分别对3种颗粒（聚乳酸、聚丙烯和聚氨酯）的输运过程进行数值模拟，研究颗粒与壁面间滚动摩擦系数对输运段出口颗粒流动特性的影响。模拟结果表明，随着滚动摩擦系数的增大，3种颗粒的出口质量流量和速度均匀性均减小；3种颗粒总转矩随着滚动摩擦系数的增大而增大，滚动摩擦及接触力引起的转矩随滚动摩擦系数的变化趋势与总转矩一致。该研究成果对3D打印进料方式的优化与进料颗粒的选择具有一定参考价值。
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| 关 键 词： | 3D打印 输运段 滚动摩擦 质量流量 |
| 收稿时间： | 2019-01-21 |
| 修稿时间： | 2019-04-28 |
Effect of rolling friction between the particle and wall on particle flow characteristics in the 3D printer feeding device |
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| Authors: | TAI Tong WANG Biao TANG Tianqi HE Yurong |
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| Institution: | School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | 3D printing is one of the revolutionary production modes. In this work, a screw extrusion device for the fused deposition modeling printer was applied, and the transport processes of three kinds of particles (polylactic acid, polypropylene, and polyurethane) in the device were simulated by using the discrete element method. This work aims to study the influence of rolling friction between the particle and wall on the characteristics of outlet particles in the feeding section. The results show that, with the increase of rolling friction coefficient between the particle and wall, the outlet mass flow rate and the velocity uniformity for the three particles are reduced and the total torques for the three particles increase. The tendencies of friction torque and contact torque are identical to that of the total torque, with the increase of rolling friction coefficient. The research results have important implication for the optimization of 3D printer feeding methods and the selection of feeding particles. |
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| Keywords: | 3D printing feeding section rolling friction mass flow rate |
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