李菊,曾氢菲,邓嘉鸣,沈惠平,熊坤.多维并联振动筛筛分过程解析与筛面运动形式优选[J].农业机械学报,2016,47(11):399-407.
Li Ju,Zeng Qingfei,Deng Jiaming,Shen Huiping,Xiong Kun.Screening Process Analysis for Multi-dimensional Parallel Vibrating Screen and Optimization of Screen Surface Movement[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(11):399-407.
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多维并联振动筛筛分过程解析与筛面运动形式优选   [下载全文]
Screening Process Analysis for Multi-dimensional Parallel Vibrating Screen and Optimization of Screen Surface Movement   [Download Pdf][in English]
投稿时间:2016-07-21  
DOI:10.6041/j.issn.1000-1298.2016.11.054
中文关键词:  多维并联振动筛  筛分过程  筛面运动形式  离散单元法
基金项目:国家自然科学基金项目(51405039、51375062)
作者单位
李菊 常州大学 
曾氢菲 常州大学 
邓嘉鸣 常州大学 
沈惠平 常州大学 
熊坤 常州大学 
中文摘要:针对物料在多维并联振动筛筛面上的运动过程及其规律不明确,以及采用何种筛面运动形式最佳的问题,研究了物料颗粒在多维振动筛筛面上的运动过程,并提出最佳的筛面运动形式。引入分散度与分层速率2个指标,基于颗粒离散单元法(DEM)研究各单自由度振动对筛面上物料分散和分层过程的影响,优选出分散度和分层速率较优的4个单自由度振动,即:分别沿筛面长度、宽度和高度方向的移动x、y和z,以及绕筛面法线方向的转动γ,其中,x和y单自由度振动效果尤为明显。在优选振动自由度组成的各种振动形式下,基于筛分效率和含杂率,对多维振动筛面的物料透筛过程进行模拟研究,表明:3平移1转动(3T-1R)四维振动形式透筛性最好,为理想的筛面运动。据此设计了一种3T-1R并联机构,并在样机上进行了筛分试验验证。
Li Ju  Zeng Qingfei  Deng Jiaming  Shen Huiping  Xiong Kun
Changzhou University,Changzhou University,Changzhou University,Changzhou University and Changzhou University
Key Words:multi dimensional parallel vibrating screen  screening process  screen surface movement form  discrete element method
Abstract:Coworkers and authors have put forward the concept of multi dimensional parallel vibrating screen, and made prototype design and experimental analysis. However, the movement process of materials on the multi dimensional vibrating screen and the problems of ideal sieve surface movement have not been solved yet. In this paper, the material movement process and the ideal screen surface movement of the multi dimensional parallel vibrating screen were studied. First of all, two important indexes were imported, including the dispersion degree and layering rate, and the effect of six single degree of freedom (DOF) vibrations of screen surface on the material dispersion and layering process based on discrete element method (DEM) were analyzed, so the four single degree of freedom vibrations of screen surface were optimized which were more conducive to the material dispersion and layering process, that was three translations x, y, and z along the length, width and height of screen surface respectively, and a rotation γ around the normal of screen surface. Among them, the effects of the x and y single degree of freedom vibrations of screen surface were particularly obvious. Then according to screening efficiency and impurity rate, screening process of material on the multi dimensional vibration sieve was simulated based on various vibration movement forms consisted of the four single degree of freedom vibrations selected. The results showed that three translational and one rotational 4 DOF vibration form xyzγ had the best screen permeability, which was selected as the ideal screen surface movement form. Finally, according to the ideal screen surface movement, a 3T-1R parallel mechanism was designed, the prototype was developed, and the screening test was carried out on the prototype. The work of this paper provided a solid theoretical basis for the design of the multi dimensional parallel vibrating screen and the selection of the optimum screening parameters.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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