刘正怀,戴素江,田立权,陈霓,王志明,陈德俊.半喂入联合收获机回转式栅格凹板脱分装置设计与试验[J].农业机械学报,2018,49(5):169-178.
LIU Zhenghuai,DAI Sujiang,TIAN Liquan,CHEN Ni,WANG Zhiming,CHEN Dejun.Design and Experiment on Rotary Grate Concave Threshing-Separating Unit of Head-feeding Combine Harvester[J].Transactions of the Chinese Society for Agricultural Machinery,2018,49(5):169-178.
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半喂入联合收获机回转式栅格凹板脱分装置设计与试验   [下载全文]
Design and Experiment on Rotary Grate Concave Threshing-Separating Unit of Head-feeding Combine Harvester   [Download Pdf][in English]
投稿时间:2017-07-13  
DOI:10.6041/j.issn.1000-1298.2018.05.019
中文关键词:  半喂入联合收获机  回转式栅格凹板  脱分装置  回归分析
基金项目:国家自然科学基金项目(51305182)、浙江省公益性技术应用研究项目(2013C32027)和浙江省自然科学基金项目(Y1110647)
作者单位
刘正怀 金华职业技术学院 
戴素江 金华职业技术学院 
田立权 金华职业技术学院 
陈霓 金华职业技术学院 
王志明 金华职业技术学院 
陈德俊 金华职业技术学院 
中文摘要:针对半喂入联合收获机在收获高产水稻时容易发生脱粒滚筒堵塞、影响作业效率等问题,设计了可沿脱粒滚筒圆弧方向循环运转的回转式栅格凹板脱粒分离装置。对被脱物质点进行了受力分析,建立了回转式凹板的动力学微分方程;在自行设计的回转式栅格凹板脱分装置试验台上进行了二次旋转组合试验,建立了脱粒滚筒转速x1、回转栅格凹板线速度x2、夹持喂入链速度x3对损失率y1、破碎率y2、含杂率y3和脱分选功耗y4等工作性能指标的回归分析模型,并进行了多目标优化计算。结果表明:动态的回转栅格凹板可有效防止脱粒滚筒堵塞;最佳工作参数组合为x1=550r/min,x2=1m/s,x3=1.2m/s,对应y1=2.14%、y2=0.2%、y3=0.6%。田间对比试验表明:具有回转式栅格凹板脱分装置的试验机收获高产稻时可全幅快速顺畅作业,工作效率比固定式栅格凹板的对比机提高30%以上。经法定机构检测,各项性能指标符合国家标准规定。
LIU Zhenghuai  DAI Sujiang  TIAN Liquan  CHEN Ni  WANG Zhiming  CHEN Dejun
Jinhua Polytechnic,Jinhua Polytechnic,Jinhua Polytechnic,Jinhua Polytechnic,Jinhua Polytechnic and Jinhua Polytechnic
Key Words:head-feeding combine harvester  rotary grate concave  threshing-separating unit  regression analysis
Abstract:To solve the problem of threshing drum being jammed and low working efficiency in head-feeding combine harvester with the fixed grade concave threshing-separating unit, the rotary grate concave threshing-separating unit was designed. The rotary grate concave surface ran the same direction along cylinder arc of threshing drum. The dynamic differential equation was established by the force analysis of rice during being threshed. A test platform of the rotary grate concave threshing-separating unit was developed. The effects of three factors, such as the speed of threshing drum, the speed of grate concave and the speed of chain, on the four performance indexes, such as loss rate, broken rate, impurity content rate and threshing power consumption were investigated. The optimal structural parameters and operation parameters were explored by quadratics rotary orthogonal combination design experiment. The multi-objective optimization calculation was carried out. The results showed that the running rotary grate concave could effectively prevent the threshing drum from being jammed;the best combination of parameters was as follows: the rotating speed of the threshing drum was 550r/min, the speed of the grate concave was 1m/s, and the speed of the chain was 1.2m/s. Correspondingly, the three indexes of loss rate, breakage rate and impurity content were 2.14%, 0.2% and 0.6%, respectively. The field test showed that equipped with a rotary grate concave threshing and separating unit the head-feeding combine harvester of rice production could work in the whole fast level with no jamming of threshing-separating unit, and improve working efficiency by more than 30% than the fixed grate concave. Each performance conformed to the national standard. The research result provided a theoretical basis for the design of head-feeding combine harvester for high-yielding rice.

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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