王立军,段良坤,郑招辉,崔友强,李义博,赵惠君.三移动两转动振动筛驱动机构优化与试验[J].农业机械学报,2018,49(6):138-145.
WANG Lijun,DUAN Liangkun,ZHENG Zhaohui,CUI Youqiang,LI Yibo,ZHAO Huijun.Optimization and Experiment on Driving Mechanism of Vibrating Screen with Three Translations and Two Rotations[J].Transactions of the Chinese Society for Agricultural Machinery,2018,49(6):138-145.
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三移动两转动振动筛驱动机构优化与试验   [下载全文]
Optimization and Experiment on Driving Mechanism of Vibrating Screen with Three Translations and Two Rotations   [Download Pdf][in English]
投稿时间:2017-11-21  
DOI:10.6041/j.issn.1000-1298.2018.06.016
中文关键词:  玉米清选  振动筛驱动机构  优化  数值模拟  非简谐运动
基金项目:国家自然科学基金项目(51475090)、黑龙江省高校新世纪优秀人才支持项目(1254-NCET-003)、黑龙江省科学基金项目(E2017004)和东北农业大学学术骨干计划项目
作者单位
王立军 东北农业大学 
段良坤 东北农业大学 
郑招辉 东北农业大学 
崔友强 东北农业大学 
李义博 东北农业大学 
赵惠君 东北农业大学 
中文摘要:为提高玉米脱出物在振动筛上的筛分效率,基于传统的平面往复振动筛,设计了一种玉米清选振动筛驱动机构,可使筛面实现3个移动2个转动;为深入研究其运动规律和筛分性能,用封闭矢量多边形法推导了筛面上任意一点的位移方程;以筛面后端振幅最小为目标,应用Isight软件优化各驱动杆件的长度,使筛面后端的振幅达到最小值15.4mm;利用Matlab数值模拟确定筛面运动为非简谐周期运动。为确定驱动机构主轴转速和玉米脱出物喂入量对振动筛性能的影响,通过试验比较玉米籽粒在该机构筛面与平面往复振动筛面上的透筛率,试验结果表明,当玉米脱出物的喂入量为6kg/s时,该机构主轴的最佳转速为260r/min,玉米籽粒在该机构筛面上的透筛率比其在平面往复振动筛上的透筛率提高了5.75%,节省功耗16.1%。
WANG Lijun  DUAN Liangkun  ZHENG Zhaohui  CUI Youqiang  LI Yibo  ZHAO Huijun
Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University and Northeast Agricultural University
Key Words:corn cleaning  driving mechanism of vibrating screen  optimization  numerical simulation  non simple harmonic motion
Abstract:Vibrating sieve for corn cleaning is a vital component of corn harvester. To further improve the screening efficiency of corn threshed mixture on the screen,a new type of driving mechanism of vibrating screen for corn cleaning was designed, in which three translations and two rotations of the screen can be realized based on the plane reciprocation mechanism with only two translation. To obtain the motion laws and screening performance of the screen,the displacement equation of any point on the screen were derived by using the closed vector polygon method. The lengths of each drive rod were determined by using optimal design of the software Isight. The optimization objective was that the displacement of the screen in the rear would be minimum. The back amplitudes of the screen optimized was 15.4mm. Combining Matlab software,the results of numerical simulation showed that the motion of the mechanism was cyclical and not simply harmonic. Comparative experiment was conducted on the new type of driving mechanism and the plane reciprocation mechanism. Sieving rate of corn particles penetrated the sieve with high-speed camera was recorded,under the condition of different speeds of spindle and the mass of corn threshed mixture. In the experiments,the mass percentages of corn kernels,corn stalks,corncob and light mixture were 73.3%,17.6%,8.7% and 0.4%, respectively. The conclusion was drawn that the optimized speed of spindle was 260r/min when the maximum feed mass was 6kg/s. The corresponding sieving rate was increased by 5.75% and energy consumption was reduced by 16.1%. The superiority of this new organization was proven. The research result provided a theoretical basis for designing more reasonable cleaning mechanism to improve the production efficiency.

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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