[1]吕奇峰,吴 恒,戴鹏飞.3D打印混凝土骨料铺洒漏斗的防堵塞设计[J].常州大学学报(自然科学版),2023,35(06):73-81.[doi:10.3969/j.issn.2095-0411.2023.06.010]
　LYU Qifeng,WU Heng,DAI Pengfei.Anti-jamming design of aggregate-spreading hopper used in 3D concrete printing[J].Journal of Changzhou University(Natural Science Edition),2023,35(06):73-81.[doi:10.3969/j.issn.2095-0411.2023.06.010]
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3D打印混凝土骨料铺洒漏斗的防堵塞设计()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第35卷
期数:
2023年06期
页码:
73-81
栏目:
土木工程：混凝土骨科专题
出版日期:
2023-11-28

文章信息/Info

Title:
Anti-jamming design of aggregate-spreading hopper used in 3D concrete printing
文章编号:
2095-0411(2023)06-0073-09
作者:
吕奇峰;  吴 恒;  戴鹏飞
(常州大学 城市建设学院, 江苏 常州 213164)
Author(s):
LYU Qifeng;  WU Heng;  DAI Pengfei
(School of Urban Construction, Changzhou University, Changzhou 213164, China)
关键词:
3D打印;  混凝土;  骨料;  漏斗;  堵塞
Keywords:
3D printing;  concrete;  aggregate;  hopper;  jamming
分类号:
TU 528.59
DOI:
10.3969/j.issn.2095-0411.2023.06.010
文献标志码:
A
摘要:
在使用骨料床3D打印混凝土过程中,为防止骨料铺洒漏斗堵塞,文章采用离散元计算程序EDEM研究了骨料在漏斗中的运动和堵塞规律。计算考虑了圆台(CTC)、正棱台(FSP)、斜棱台(FOP)3种不同形状的漏斗,并以骨料尺寸、骨料数目和漏斗高度为计算变量,得到81组不同的计算结果。结果显示,在相同漏斗特征尺寸下,斜棱台和正棱台漏斗容积相同,但比圆台漏斗容积大。在铺洒骨料时,圆台漏斗堵塞概率最大,正棱台漏斗次之,斜棱台漏斗最小。相比骨料数目和漏斗高度,骨料尺寸对漏斗的堵塞影响较大。针对上述结果,文章设计了防堵塞的斜棱台漏斗,该漏斗在侧壁上增加了往复运动的扰动球,设计成本较低,且能有效防止铺洒骨料的漏斗出现堵塞现象。
Abstract:
In the aggregate-bed 3D concrete printing, to avoid the jamming effect happened in the aggregate-spreading hopper, the motion and jamming of the aggregates in hopper was researched in this work by using the EDEM code based on the discrete element method. Three types of hoppers, circular truncated cone(CTC), frustum of square pyramid(FSP)and frustum of oblique pyramid(FOP), were considered in the calculation. And the aggregate size, aggregate quantity and hopper height were the calculation variables. In all, 81 groups of data were obtained. Results revealed that the FSP and FOP hoppers had the same volume which was greater than that of CTC hopper with the same feature size. During spreading aggregates, the jammed probability of the CTC hopper was the highest, the FSP hopper was the second and the FOP hopper showed the lowest jammed probability. In addition, the aggregate size affected the jamming more than the aggregate quantity and hopper height did. Based on the findings, an anti-jamming FOP hopper was designed in this work. On the side wall of the designed hopper, an excitation ball with reciprocal motion was set. Such design had lower cost but would effectively prevent the jamming appeared in the hopper during the aggregate spreading.

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备注/Memo

备注/Memo:
收稿日期: 2023-06-26。
基金项目: 国家自然科学基金资助项目(51908075)。
作者简介: 吕奇峰(1986—), 男, 河北邢台人, 博士, 讲师。E-mail: lqf@cczu.edu.cn
更新日期/Last Update: 1900-01-01