王震民,李永祥,徐雪萌.粉体密实变螺距螺杆结构设计与仿真分析[J].包装工程,2020,41(23):172-178.
WANG Zhen-min,LI Yong-xiang,XU Xue-meng.Structural Design and Simulation Analysis of Powder Compact Pitch Screw[J].Packaging Engineering,2020,41(23):172-178. |
| 粉体密实变螺距螺杆结构设计与仿真分析 |
| Structural Design and Simulation Analysis of Powder Compact Pitch Screw |
| 投稿时间：2020-02-24 |
| DOI：10.19554/j.cnki.1001-3563.2020.23.024 |
| 中文关键词: 粉体 螺旋输送 密实 参数设计 仿真分析 |
| 英文关键词: powder screw conveying compact parameter design simulation analysis |
| 基金项目:国家重点研发计划(2018YFD0400704)，河南省科技厅自然科学项目(182102110163) |
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| 中文摘要: |
| 目的 针对粉体螺旋输送时物料含气导致的物料密实度不足、包装机工作效率低等问题，设计一种变螺距螺旋来达到密实粉体、提高螺旋输送效率的目的。方法 首先通过气体容积法，测定粉体物料的压实密度，由粉体螺旋输送过程中密度流量关系式，计算得出在转速、螺旋叶片直径一定时，达到压实密度的最小螺距。然后在输送长度确定的情况下，运用等差设计原则，计算出密实段变螺距螺旋的设计参数。最后进行三维建模及仿真分析，对所设计的螺旋进行优化。结果 设计出了三段式变距螺旋，相较于等螺距螺旋，输送过程中物料密度增加了6.541%，螺旋输送质量流量提高了2.475%。结论 验证了通过变螺距螺旋来达到密实粉体的可行性，提高了螺旋输送效率，为螺旋输送过程中粉体脱气方法提供了参考。 |
| 英文摘要: |
| The work aims to design a variable pitch screw to achieve the purpose of compacting powder and improving screw conveying efficiency to solve the insufficient material compactness and low packaging machine efficiency caused by the powder material containing gas during the screw conveying of powder. The gas volume method was used to determine the compacted density of the powder material. From the density and flow relationship during the screw conveying of the powder, the minimum pitch to reach the compacted density at a certain speed and the diameter of the screw blade was calculated. When the conveying length was determined, the design parameters of the variable pitch screw of the compact segment were calculated using the principle of equal-difference design. And three-dimensional modeling and simulation analysis were performed to optimize the designed screw. A three-stage variable-pitch screw was designed. Compared with the constant pitch screw, the material density increased by 6.541% and the screw conveying mass flow increased by 2.475%. The feasibility of using variable pitch to achieve compact powder is verified, and the screw conveying efficiency is improved. It provides a reference for the method of powder degassing during screw conveying. |
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