喷管结构对纳米石墨片喷射速度及汇集特性影响

发布时间：2018-04-10 22:24

本文选题：喷射成型 + 变截面喷管结构设计　；参考：《机械设计与制造》2017年09期

【摘要】：喷管作为纳米石墨片喷射成型过程中核心部件,其结构设计合理与否对纳米石墨片喷射速度以及汇聚特性有重大影响。在微粉喷射成型圆形截面喷管结构的研究基础上,对其直管段进行了改进,以椭圆形变截面或矩形变截面代替原有的圆形截面,并采取数值模拟方法分析了上述三种喷管对于微粒喷射速度及其分布范围的影响,研究表明,椭圆形变截面打印喷管效果要明显好于矩形变截面和圆形截面喷管,最后通过实验研究验证了数值模拟结果的正确性。
[Abstract]:Nozzle is the core part in the process of nano-graphite injection molding. Whether the structure of nozzle is reasonable or not has a great influence on the spray speed and convergence characteristics of nano-graphite.On the basis of the research on the nozzle structure of circular section formed by micro-powder injection, the straight section of the nozzle is improved, and the elliptical variable section or rectangular variable section is replaced by the original circular section.The effect of the three kinds of nozzle on the particle injection velocity and its distribution range is analyzed by numerical simulation. The results show that the effect of elliptical nozzle with variable section is better than that of rectangular nozzle with variable section and circular section.Finally, the correctness of the numerical simulation results is verified by experimental research.
【作者单位】：三峡大学水电机械设备设计与维护湖北省重点实验室;
【基金】：国家自然科学基金(51575313) 湖北省自然科学基金(2014CFB678) 湖北省教育厅自然科学研究计划项目(B2013173) 华中科技大学材料成型与模具技术国家重点实验室开放基金课题(P2015-11)
【分类号】：TB34;TQ127.11

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