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王建楠,刘敏基,曹明珠,颜建春,彭宝良,胡志超,谢焕雄.薏苡脱壳机关键部件作业参数优化与试验[J].农业工程学报,2018,34(13):288-295.DOI:10.11975/j.issn.1002-6819.2018.13.035
薏苡脱壳机关键部件作业参数优化与试验
投稿时间:2018-03-22  修订日期:2018-05-10
中文关键词:  农作物  优化  脱壳机  薏苡  作业参数  物料特性  关键部件  响应曲面法
基金项目:中国农科院创新工程农产品分级与贮藏团队、公益性行业(农业)科研专项经费(201303069)联合支持。
作者单位
王建楠 农业部南京农业机械化研究所南京 210014 
刘敏基 农业部南京农业机械化研究所南京 210014 
曹明珠 农业部南京农业机械化研究所南京 210014 
颜建春 农业部南京农业机械化研究所南京 210014 
彭宝良 农业部南京农业机械化研究所南京 210014 
胡志超 农业部南京农业机械化研究所南京 210014 
谢焕雄 农业部南京农业机械化研究所南京 210014 
摘要点击次数: 297
全文下载次数: 49
中文摘要:针对薏苡脱壳设备脱净率差、破碎率高,相关工艺与装备研究几近空白的现状,该文结合薏苡物料特性,运用中心组合试验设计理论开展关键部件作业参数试验与优化,重点研究薏苡脱壳机脱壳仓作业关键参数中动盘转速、动静磨盘间隙、静盘工作面宽度对脱净率、破碎率的影响规律,并以脱净率、破碎率为响应指标进行多目标优化。首先对主产区主要薏苡品种物料特性进行研究,并进行与脱壳相关的物理参数测定,然后采用二次正交旋转组合试验方法设计试验并用Design-Expert进行数据处理,建立脱净率、破碎率的回归数学模型并进行方差分析。分析得出影响薏苡脱壳机脱净率的主次因素依次为:动盘转速>静盘工作面宽度>动静磨盘间隙;影响破碎率的主次因素依次为:静盘工作面宽度>动静磨盘间隙>动盘转速。通过响应曲面方法分析各因素交互作用对脱净率、破碎率的影响,并根据优化目标的重要程度(脱净率较破碎率重要)对回归模型进行多目标优化,得出薏苡脱壳机关键部件最佳作业参数组合为:动盘转速1 076.02 r/min,动静磨盘间隙4.91 mm,静盘工作面宽度7.63 mm。此时,脱壳机脱净率最高、破碎率最低,其值分别为50.49%、3.02%。将优化参数在薏苡脱壳设备上开展验证及批量化流水加工作业,流水加工作业脱净率达51.1%、破碎率3.6%,设备作业质量大幅提升,达到了较为理想的效果。该研究可为提升薏苡脱壳机作业质量提供参考。
Wang Jiannan,Liu Minji,Cao Mingzhu,Yan Jianchun,Peng Baoliang,Hu Zhichao,Xie Huanxiong.Working parameter optimization and experiment of key components of coix lacryma-jobi sheller[J].Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE),2018,34(13):288-295.DOI:10.11975/j.issn.1002-6819.2018.13.035
Working parameter optimization and experiment of key components of coix lacryma-jobi sheller
Author NameAffiliation
Wang Jiannan Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China 
Liu Minji Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China 
Cao Mingzhu Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China 
Yan Jianchun Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China 
Peng Baoliang Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China 
Hu Zhichao Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China 
Xie Huanxiong Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China 
Key words:crops  optimization  sheller  coix lacryma-jobi  working parameters  physical properties  key component  response surface methodology
Abstract:In order to improve the shelling rate and reduce the breakage rate, the central composite experiments were conducted to optimize the working parameters. Firstly, the physical properties of coix lacryma-jobi were studied, and the study object was "White shell coix lacryma-jobi" planted widely in Guizhou Province, the shape of which was irregular, and the thousand kernel weight was 86.5g. Proportion of thickness δ≤5 mm was 25%, 5<δ≤5.5 was 58%, and others were δ>5.5. The weight ratio of shell and kernel was 1:2.5. The moisture content of shell and kernel was 11.6% and 12.7% respectively. The crushing force of coix lacryma-jobi was 45 N≤F≤95 N, 60% of which was about 65 N. The flow angle of coix lacryma-jobi tested by inclined surface device was 14.5°. Based on composite experiment methods of quadratic orthogonal rotation, the effects of key components' main working parameters of coix lacryma-jobi sheller on shelling rate and breakage rate were analyzed, the parameters include rotation speed of rotary plate, distance between rotary and stationary plate, working face width of stationary plate, and the data were analyzed based on the Design-Expert software. The mathematical regression models of shelling rate and breakage rate were built, and corresponding variance analysis were conducted. A regression equation of the relationship between variation coefficient of 3 main working parameters was obtained. Through the analysis of variance, the results showed that the most influential factor for shelling rate was the rotation speed of rotary plate, and the minimum impact factor was the distance between rotary and stationary plate; regarding to the breakage rate, the most influential factor was working face width of stationary plate, and the minimum impact factor was the rotation speed of rotary plate. The response surface method was utilized to analyze the effects of factors' interaction on shelling rate and breakage rate, and the multi-objective optimizations were conducted for the regression models to obtain the working parameters for the best shelling rate and the lowest breakage rate. The optimal combination working parameters of key components of coix lacryma-jobi sheller were the speed of rotary plate was 1 076.02 r/min, the distance between rotary and stationary plate is 4.91 mm, and the working face width of stationary plate of 7.63 mm. Under the condition of the optimal combination working parameters, the shelling rate and breakage rate was 50.49% and 3.02%, respectively. The production verification test was conducted in factory. With the optimal parameters of coix lacryma-jobi sheller, the shelling rate was improved greatly, and the shelling rate and breakage rate was 51.1% and 3.6%, respectively, which close to the results obtained from the previous model. The study provides the scientific basis for key components' working parameters optimization of coix lacryma-jobi sheller.
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