Authors

Abstract

The mixing characteristics and movement principles of brown rice particles in two different types of germinated brown rice machine tanks were investigated based on the discrete element method. Through numerical simulation, the effects of different mixing process parameters on the mixing uniformity and energy consumption of brown rice particles were quantitatively analyzed, and the most optimal mixing process parameters were determined: 40.16% filling degree and 20r/min rotational speed for blade-type germinated brown rice machine, and 37.9% filling degree and 20r/min rotational speed for drum-type germinated brown rice machine. In addition, a set of drum type sprouted brown rice machine mixing test platform was designed and built, and the accuracy of the discrete element simulation outcomes was confirmed via the physical tests, which showed that the simulation environment was consistent with the change rule of the movement state and mixing uniformity of brown rice particles under the physical test environment. This paper provides a significant theoretical basis and experimental support for the refinement of the design and the enhancement of the manufacturing process for the germinated brown rice machine.

Abstract in Chinese

本文基于离散元法研究了糙米颗粒在两种不同类型的发芽糙米机罐体内的混合特性和运动规律。通过数值模拟，定量分析了不同混合工艺参数对糙米颗粒混合均匀度和能耗的影响，确定了最优混合工艺参数：叶片式发芽糙米机填充度40.16%、转速20r/min，滚筒式发芽糙米机填充度37.9%、转速20r/min。此外，还设计并搭建了一套滚筒式发芽糙米机混合试验平台，通过物理试验验证了离散元模拟仿真结果的准确性，表明仿真环境与物理试验环境下糙米颗粒的运动状态及混合均匀度的变化规律一致。这一研究为发芽糙米机的设计优化和生产工艺优化提供了重要的理论依据和实验支持。