Research on grains movement and interaction mechanism under rice blade spacing and sieve structure effect in vertical rice mill

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-06-17 DOI:10.1016/j.powtec.2025.121267

Liu Yang , Pingan Huang , Yu Li , Can Shu , Nuo Yan , Qiujun Zhang , Menghao Zhao , Zhiwei Liu , Jiaming Wang , Shaoyun Song , Yonglin Zhang

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Abstract

The external milling vertical rice mill (EMVRM) is one of the new rice milling process equipment. The grains moving and interaction mechanism are basic points for milling, rice blade-sand bar spacing H, sieve structure are important structural parameters need considering. The EMVRM 3D model and DEM contact working model are established. The rice blade spacing H and sieve structure effect on grains motion and interaction in is analyzed. Grains motion velocity and density in milling chamber gradually reduced along axial flow direction. The milling chamber grains average motion velocity difference decreases with spacing H increasing. The grain normal and tangential force show down parabolic relation with axial distance from inlet. The sieve direction has little effect on grain motion velocity and force. Normal and tangential force in milling chamber reduced downward along the axial. The research provides practical guidance for EMVRM mill design.

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立式碾米机叶片间距与筛网结构作用下稻米运动及相互作用机理研究

外铣立式碾米机（EMVRM）是一种新型碾米工艺设备。颗粒运动和相互作用机理是磨矿的基本点，米叶-砂杆间距H、筛结构是需要考虑的重要结构参数。建立了EMVRM三维模型和DEM接触工作模型。分析了水稻叶片间距H和筛网结构对籽粒运动和相互作用的影响。晶粒在磨腔内的运动速度和密度沿轴向逐渐减小。铣削室晶粒平均运动速度差随间距H的增大而减小。颗粒法向力和切向力随距进口轴向距离呈下抛物线关系。筛网方向对颗粒运动速度和作用力影响不大。铣削腔内的法向力和切向力沿轴向向下减小。研究结果为EMVRM磨机设计提供了实践指导。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.