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工程设计学报  2022, Vol. 29 Issue (5): 547-554    DOI: 10.3785/j.issn.1006-754X.2022.00.072
优化设计     
基于离散元法的双组份复合涂料搅拌螺杆参数优化
张文豪(),班传文,李松梅()
青岛科技大学 机电工程学院,山东 青岛 266061
Parameter optimization of stirring screw for two-component composite coatings based on discrete element method
Wen-hao ZHANG(),Chuan-wen BAN,Song-mei LI()
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
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摘要:

为了提高双组份复合涂料的混合均匀度,对搅拌螺杆的参数进行优化。以混合销钉式搅拌螺杆为对象,建立其三维模型后导入EDEM软件,然后基于离散元法对双组份复合涂料在该搅拌螺杆中的搅拌过程进行仿真分析,研究了螺杆的转速、螺距和长径比对混合均匀度的影响。最后通过单轴压缩实验对螺杆参数优化后的搅拌效果进行了对比验证。结果表明:螺杆转速、螺距和长径比分别通过改变颗粒抛撒程度、螺旋叶片间隙和螺杆长度来影响复合涂料的混合均匀度;稳定出料后,螺杆转速为200 r/min、螺距为80 mm、长径比为5.57∶1时的搅拌效果最佳;实验验证了利用优化后搅拌螺杆搅拌时复合涂料的力学性能优于手工搅拌时的。研究结果可为自动化搅拌螺杆的结构设计和参数优化提供理论依据。

关键词: 双组份复合涂料搅拌螺杆离散元法搅拌参数优化    
Abstract:

In order to improve the mixing uniformity of two-component composite coatings, the parameters of stirring screw were optimized. Taking the mixed pin type stirring screw as the object, its three-dimensional model was established and imported into the EDEM software. Then, based on the discrete element method, the stirring process of two-component composite coatings in the stirring screw was simulated and analyzed, in order to study the effects of rotation speed, pitch and aspect ratio of screw on the mixing uniformity. Finally, the uniaxial compression experiment was conducted to compare and verify the stirring effect after optimization of screw parameters.The results showed that the mixing uniformity of composite coatings was affected by the rotation speed, pitch and aspect ratio of screw through changing the particle dispersion, screw blade gap and screw length, respectively; after stable discharge, when the screw rotation speed was 200 r/min, the pitch was 80 mm, and the aspect ratio was 5.57∶1, the stirring effect was the best; the experiment verified that the mechanical properties of the composite coatings when stirred by the optimized stirring screw were better than those when stirred by hand. The research results can provide a theoretical basis for the structural design and parameter optimization of the automatic stirring screw.

Key words: two-component composite coatings    stirring screw    discrete element method    optimization of stirring parameters
收稿日期: 2022-02-14 出版日期: 2022-11-02
CLC:  TH 224  
基金资助: 国家自然科学基金资助项目(51972186);山东省自然科学基金资助项目(ZR2020ME114)
通讯作者: 李松梅     E-mail: 1401452571@qq.com;Lisongmei1126@163.com
作者简介: 张文豪(1997—),男,山东聊城人,硕士生,从事机械传动设计与方法研究,E-mail:1401452571@qq.com
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引用本文:

张文豪,班传文,李松梅. 基于离散元法的双组份复合涂料搅拌螺杆参数优化[J]. 工程设计学报, 2022, 29(5): 547-554.

Wen-hao ZHANG,Chuan-wen BAN,Song-mei LI. Parameter optimization of stirring screw for two-component composite coatings based on discrete element method[J]. Chinese Journal of Engineering Design, 2022, 29(5): 547-554.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn.1006-754X.2022.00.072        https://www.zjujournals.com/gcsjxb/CN/Y2022/V29/I5/547

图1  混合销钉式搅拌螺杆三维模型
材料泊松比剪切模量/Pa密度/(kg/m3
A组份0.441.3×1072 050
B组份0.301.0×1061 200
螺杆0.308.0×10107 850
表1  螺杆和复合涂料颗粒的材料本征参数
接触关系

恢复

系数

静摩擦系数动摩擦系数

表面能/

(J/m2)

A组份—A组份0.100.80.015.0
A组份—B组份0.050.10.013.5
B组份—B组份0.010.60.012.0
A组份—螺杆0.150.50.015.0
B组份—螺杆0.030.40.012.0
表2  螺杆和复合涂料颗粒的接触参数
图2  不同螺杆转速下两组份颗粒的混合状态
图3  不同螺杆转速下A组份的体积分布
图4  不同螺杆转速下两组份颗粒总数量随时间的变化曲线
图5  不同螺杆转速下A组份颗粒离散系数随时间的变化曲线
图6  不同螺杆螺距下两组份颗粒的混合状态
图7  不同螺杆螺距下A组份的体积分布
图8  不同螺杆螺距下两组份颗粒总数量随时间的变化曲线
图9  不同螺杆螺距下A组份颗粒离散系数随时间的变化曲线
图10  不同螺杆长径比下两组份颗粒的混合状态
图11  不同螺杆长径比下A组份的体积分布
图12  不同螺杆长径比下两组份颗粒总数量随时间的变化曲线
图13  不同螺杆长径比下A组份颗粒离散系数随时间的变化曲线
图14  单轴压缩实验的复合涂料试样
图15  不同搅拌方法下复合涂料试样平均应力的变化曲线
  
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