王立军,冯鑫,郑招辉,于泳涛,刘天华,马杨.玉米清选组合孔筛体设计与试验[J].农业机械学报,2019,50(5):104-113.
WANG Lijun,FENG Xin,ZHENG Zhaohui,YU Yongtao,LIU Tianhua,MA Yang.Design and Test of Combined Sieve of Maize Screening[J].Transactions of the Chinese Society for Agricultural Machinery,2019,50(5):104-113.
摘要点击次数: 2002
全文下载次数: 1136
玉米清选组合孔筛体设计与试验   [下载全文]
Design and Test of Combined Sieve of Maize Screening   [Download Pdf][in English]
投稿时间:2018-09-05  
DOI:10.6041/j.issn.1000-1298.2019.05.012
中文关键词:  玉米籽粒收获机  振动筛  贝壳筛  透筛模型  组合孔筛
基金项目:国家自然科学基金项目(51475090)、黑龙江省自然科学基金项目(E2017004)和国家重点研发计划项目(2018YFD0300103)
作者单位
王立军 东北农业大学 
冯鑫 东北农业大学 
郑招辉 东北农业大学 
于泳涛 东北农业大学 
刘天华 东北农业大学 
马杨 东北农业大学 
中文摘要:为增强玉米清选筛体对高喂入量脱出物的筛分能力,以适应玉米联合收获机快速发展要求,以玉米籽粒为研究对象,对贝壳筛体作业机理进行分析,探究筛分过程中籽粒在贝壳筛体上运动状态,得到贝壳筛对籽粒的筛分特性和籽粒的透筛模型。为增大籽粒透筛概率,基于贝壳筛和圆孔筛的筛分特性,设计了贝壳-圆孔组合孔筛体。在玉米脱出物不同喂入量条件下进行仿真试验,对组合孔筛、圆孔筛、贝壳筛作业效果进行对比,结果表明:在喂入量为6kg/s情况下,组合孔筛作业后的籽粒损失率、清洁率和筛分时间分别为1.15%、97.53%和5.50s,均满足国家标准要求,且组合孔筛的籽粒损失率比圆孔筛和贝壳筛分别减少了5.79个百分点和7.84个百分点,通过台架试验验证了仿真结果准确性。在喂入量分别为5kg/s和6kg/s条件下对组合孔筛与阶梯筛筛分效果进行对比,在喂入量为6kg/s、气流速度为12.8m/s、气流方向角30°、振动频率为5.15Hz时,组合孔筛相对阶梯筛籽粒损失率降低5.60个百分点,筛分时间缩短0.93s,清选效果提高。
WANG Lijun  FENG Xin  ZHENG Zhaohui  YU Yongtao  LIU Tianhua  MA Yang
Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University and Northeast Agricultural University
Key Words:maize grain harvester  vibration sieve  shellfish sieve  model of maize sieving  combined sieve
Abstract:Aiming to increase the carrying capacity of maize cleaning sieve to high feed quantity to meet the requirement of rapid development of maize grain harvester. Through the analysis of mechanism of shellfish screening, the screening performance and the model of maize screening were obtained. In order to increase the probability of grain permeation, based on the screening characteristics of shell sieve and round sieve, the maize combined sieve which consisted of the shapes of shellfish and round hole was designed. Under the conditions of different feeding quantities of maize extractives, the simulation tests which included combined sieve, single round hole sieve and single shellfish screening test separately were carried out, then their screening performances were compared and analyzed. The results showed that compared with the single round hole sieve and the shellfish sieve respectively, the loss rates of maize of combined sieve was decreased by 4.79 percentage points and 7.85 percentage points when the feeding quantity was 5kg/s, the loss rates of maize of combined sieve was decreased by 5.79 percentage points and 7.84 percentage points when the feeding quantity was 6kg/s. Under the condition of feeding quantity was 2~6kg/s, the cleaning rate and sieving time were 99.22% to 97.53% and 4.87s to 5.50s partly, thus all indicators met the national standards. The performance of the combined sieve was verified by bench test. The loss rate of maize, cleaning rate of maize and screening time of the combined sieve were 1.09%, 95.94% and 6.48s, when feeding quantity was 6kg/s, respectively. Compared with the stepped sieve, the combined sieve grain loss rate was reduced by 5.60 percentage points, the screening time was shortened by 0.93s, and the performance of the cleaning device was further improved. 

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.

   下载PDF阅读器