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立轴行星式搅拌机叶片磨损特性的数值研究

Numerical Study of Wear Characteristics of Vertical Shaft Planetary Mixer Blades.

作者信息

Jiang Shoubo, Zhang Hongwei, Zeng Qingliang, Du Qian, Liu Xiaopeng

机构信息

College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China.

出版信息

Materials (Basel). 2025 Jul 2;18(13):3137. doi: 10.3390/ma18133137.

DOI:10.3390/ma18133137
PMID:40649626
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12250878/
Abstract

The wear failure of vertical shaft planetary mixer blades under complex working conditions directly affects the quality and productivity of concrete. Given that it is time-consuming and labor-intensive to obtain the wear characteristics of mixer blades by experimental methods, this study used numerical simulation to analyze the effects of different factors on the wear characteristics of mixer blades based on the Hertz-Mindlin with JKR cohesive contact model and the Archard wear model. The results of this study show that under the influence of different factors, the blade is subjected to tangential cumulative contact energy and contact force is significantly larger than that in the normal direction, the wear of the blade is judged to be the form of abrasive wear accompanied by impacts, and the wear on the outer middle and lower edge regions of the blade is the most serious. Specifically, for every 5 rpm increase in mixing speed, the blade wear rate increases by 24.14% on average; for every 5° increase in blade angle, the blade wear rate decreases by 2.9% on average; for every 10% increase in the mass ratio of stone aggregate, the blade wear rate increases by 5.95% on average; conical aggregates have the most serious effect on blade wear, while spherical aggregates have the most minor effect. This study provides the theoretical basis and numerical support for understanding the reasons for blade wear loss and enhancing the service life of mixer blades.

摘要

在复杂工况下，立轴行星式搅拌机叶片的磨损失效直接影响混凝土的质量和生产效率。鉴于通过实验方法获取搅拌机叶片磨损特性耗时费力，本研究基于赫兹-明德林（Hertz-Mindlin）与JKR粘结接触模型以及阿查德（Archard）磨损模型，采用数值模拟方法分析了不同因素对搅拌机叶片磨损特性的影响。研究结果表明，在不同因素影响下，叶片受到的切向累积接触能量和接触力显著大于法向，判断叶片磨损为伴有冲击的磨粒磨损形式，且叶片外中下部边缘区域磨损最为严重。具体而言，搅拌速度每增加5转/分钟，叶片磨损率平均增加24.14%；叶片角度每增加5°，叶片磨损率平均降低2.9%；石料骨料质量比每增加10%，叶片磨损率平均增加5.95%；锥形骨料对叶片磨损影响最为严重，而球形骨料影响最小。本研究为理解叶片磨损损失原因及提高搅拌机叶片使用寿命提供了理论依据和数值支持。

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本文引用的文献

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Experimental Research Regarding the Effect of Mineral Aggregates on the Wear of Mixing Blades of Concrete Mixers.关于矿物集料对混凝土搅拌机搅拌叶片磨损影响的试验研究
Materials (Basel). 2023 Jul 17;16(14):5047. doi: 10.3390/ma16145047.
3
Experimental Research on the Wear Behavior of Materials Used in the Manufacture of Components for Cement Concrete Mixers.
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Materials (Basel). 2023 Mar 14;16(6):2326. doi: 10.3390/ma16062326.
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Simulation of the Attrition of Recycled Concrete Aggregates during Concrete Mixing.混凝土搅拌过程中再生混凝土骨料磨损的模拟
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