基于DEM离散元技术的玉米直线振动筛仿真分析
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(河南交通职业技术学院航运海事系,河南 郑州 450005)

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王秉(1965—),男,河南交通职业技术学院副教授,硕士。E-mail:wbjtxy@163.com

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河南省教育厅项目(编号:JYB2015037)


Analysis and simulation of corn vibrating screen based on DEM
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(Maritime Department of Henan Vocational and Technical College of Communications, Zhengzhou, Henan 450005, China)

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    摘要:

    目的:分析物料颗粒在直线振动筛面上的运动情况,以便直线振动筛的机构优化。方法:基于离散单元法,采用EDEM软件对直线振动筛面上物料颗粒的运动情况进行仿真分析。以堆积角为响应,采用批处理的形式对仿真物料颗粒的离散元仿真参数进行校准;采用SolidWorks软件建立直线振动筛的三维模型,以物料在筛网面的下落高度、物料颗粒的形状尺寸为变量,以物料颗粒在筛网面上运动的平稳程度为指标,通过仿真,观察物料颗粒在晒网面的运动速度及位置分布情况。结果:单球形颗粒的速度分布相对较大,在达到振动筛分平稳阶段,单球形玉米颗粒的速度分布相对稳定,颗粒跳动现象明显减少。双球形玉米颗粒的速度分布相对较小,在达到筛分的稳定阶段,双球形玉米颗粒的位置跳动比较明显。双球形玉米颗粒在振动筛面的速度明显低于单球形玉米颗粒,不同下落高度的单球形玉米颗粒对振动筛分有一定的影响。结论:在对直线型振动筛分设计过程中,不同的高度,不同的颗粒形状对筛分的效率都有较大的影响,基于离散元法可以有效地分析物料振动筛分情况。

    Abstract:

    Objective: Analyze the movement of the material particles on the linear vibrating screen to optimize the mechanism of the linear vibrating screen. Methods: Based on the discrete element method, the EDEM software is used to simulate and analyze the movement of the material particles on the linear vibrating screen. In response to the stacking angle, the discrete element simulation parameters of the simulated material particles were calibrated in the form of batch processing. The SolidWorks software was used to establish the three-dimensional model of the linear vibrating screen, and the material falling height on the screen surface and the shape and size of the material particles were used as Variable. Taking the smoothness of the material particles on the screen surface as an indicator, through simulation, observed the movement speed and position distribution of the material particles on the drying screen surface. Results: The velocity distribution of the single spherical particles was relatively large. After reaching the stable stage of vibrating screening, the velocity distribution of the single spherical corn particles was relatively stable, and the particle beating phenomenon was significantly reduced. The velocity distribution of the double-spherical corn particles was relatively small, and the position of the double-spherical corn particles fluctuated more obviously after reaching the stable stage of sieving. The speed of double-spherical corn particles on the vibrating screen was significantly lower than that of single-spherical corn particles, and single-spherical corn particles with different falling heights had a certain effect on the vibrating screen. Conclusion: In the design process of linear vibrating screening, different heights and different particle shapes have a greater impact on the screening efficiency. Based on the discrete element method, the vibrating screening of materials can be effectively analyzed.

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引用本文

王秉.基于DEM离散元技术的玉米直线振动筛仿真分析[J].食品与机械,2021,37(10):89-92.
WANGBing. Analysis and simulation of corn vibrating screen based on DEM[J]. Food & Machinery,2021,37(10):89-92.

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  • 收稿日期:2021-07-02
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  • 在线发布日期: 2023-02-15
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