张强林,胡靖明,杨梅,杨金发,李沫若,王清泽,张文洁,毕阳.基于EDEM的沙棘冻浆果振动清选装置参数优化与分析[J].干旱地区农业研究,2024,(3):276~286
基于EDEM的沙棘冻浆果振动清选装置参数优化与分析
Optimization and analysis of parameters of sea buckthorn frozen fruit vibrating cleaning device based on EDEM
  
DOI:10.7606/j.issn.1000-7601.2024.03.29
中文关键词:  沙棘  振动筛  离散元  透筛概率  清洁率
英文关键词:sea buckthorn  vibrating screen  discrete element  penetration probability, cleanliness rate
基金项目:国家自然科学基金项目 (52065006);甘肃省科技计划资助项目(22YF7NA114)
作者单位
张强林 甘肃农业大学机电工程学院甘肃 兰州 730070 
胡靖明 甘肃农业大学机电工程学院甘肃 兰州 730070 
杨梅 甘肃农业大学机电工程学院甘肃 兰州 730070 
杨金发 甘肃农业大学机电工程学院甘肃 兰州 730070 
李沫若 甘肃农业大学机电工程学院甘肃 兰州 730070 
王清泽 甘肃农业大学机电工程学院甘肃 兰州 730070 
张文洁 甘肃农业大学机电工程学院甘肃 兰州 730070 
毕阳 甘肃农业大学食品科学与工程学院甘肃 兰州 730070 
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中文摘要:
      针对沙棘冻浆果清选加工中存在清洁率低,筛网易堵塞的问题,采用离散元EDEM软件对振动清选装置的结构和运动参数进行优化。以速冻沙棘枝条果机械脱果后的冻浆果、枝条和果梗等颗粒为试验物料,测定物料的尺寸特征,进行振动清选装置动力学分析和筛上颗粒受力分析。分析筛网不同形状以及尺寸的筛孔组合对振动清选装置清洁率和透筛概率的影响,确定筛网设计参数为第一层筛网为圆孔、孔径为11 mm,第二层筛网为圆孔、孔径为9 mm,第三层筛网为长孔、孔径为5 mm×25 mm。单因素试验结果表明:振幅的改变未显著影响洁净率和透筛率,在保证高清洁率时选取筛体振幅为6 mm。选取振动频率,振动方向角,筛面倾角为试验因素,清洁率和透筛概率为试验指标,设计二次正交旋转组合试验,建立各因素与指标间的数学模型,优化结果最优组合为:振动频率为17.52 Hz、振动方向角为44.7°、筛面倾角为1.56°时,振动清选装置清洁率为99.62%、透筛概率为33.42%。通过台架试验和仿真试验对最优参数组合进行验证,结果表明:台架试验和仿真试验结果基本一致,清洁率的相对误差为1.13%,颗粒透筛数量的相对误差为1.68%。该研究可为沙棘冻浆果振动清选装置的优化设计提供理论依据。
英文摘要:
      Aiming at solving problems of low cleanliness rate and easy clogging of screens in the cleaning and processing of sea buckthorn frozen berries, this study used EDEM software to optimize the structural and motion parameters of the vibrating cleaning device. Using frozen berries, branches, and fruit stems from mechanical dehulling of quick\|frozen sea buckthorn branches and fruits as experimental materials to measure the size characteristics of the materials and carry out the dynamic analysis of the vibration cleaning device and the force analysis of the particles on the sieve. Based on the analysis of the influence of different shapes and sizes of screen mesh combinations on the cleaning rate and penetration probability of the vibration cleaning device, the design parameters of the screen mesh were determined as follows: the first layer of screen mesh was a circular hole with a diameter of 11 mm, the second layer of screen mesh was a circular hole with a diameter of 9 mm, and the third layer of screen mesh was a long hole with a diameter of 5 mm × 25 mm. The single factor test results showed that the change of amplitude did not significantly affect the cleanliness rate and penetration probability, and the amplitude of the sieve body was selected as 6 mm to ensure the high cleanliness rate. The vibration frequency, vibration direction angle, and screen surface inclination angle as the test factors, the??cleanliness rate and the penetration probability as the test indicators were selected to design the quadratic orthogonal rotation combination test and establish the mathematical model between each factor and the index. The optimal combination of the optimization results was as follows: when the vibration frequency was 17.52 Hz, the vibration direction angle was 44.7°, and the screen surface inclination angle was 1.56°, the cleanliness rate of the vibrating cleaning device was 99.62%, and the screening probability was 33.42%. The optimal parameter combination was verified by bench test and simulation test, and the results showed that the results of bench test and simulation test were basically consistent with a relative error of 1.13% for cleaning and 1.68% for particle screening quantity. This study can provide a theoretical basis for the optimization design of the vibration cleaning device for sea buckthorn frozen berries.
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