气力式圆筒筛膜杂分离机改进设计与试验  

Improved Design and Test on Pneumatic Cylinder Sieve Film Hybrid Separator

作　　者：彭强吉[1,2] 李成松 康建明[2] 史高昆 张恒 PENG Qiangji;LI Chengsong;KANG Jianming;SHI Gaokun;ZHANG Heng(College of Mechanical and Electrical Engineering,Shihezi University,Shihezi 832003,China;Shandong Academy of Agricultural Machinery Sciences,Ji nan 250100,China;College of Engineering and Technology,Southwest University,Chongqing 400715,China)

机构地区：[1]石河子大学机械电气工程学院,石河子832003 [2]山东省农业机械科学研究院,济南250100 [3]西南大学工程技术学院,重庆400715

出　　处：《农业机械学报》2020年第8期126-135,共10页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(51805305);山东省重点研发计划项目(2018GNC112006);山东省农机装备研发创新计划项目(2018YF020-09);山东省农业重大应用技术创新项目(SD2019NJ002);山东省农业科学院农业科技创新工程项目(CXGC2018E18)。

摘　　要：针对气力式圆筒筛膜杂分离机筛分性能波动大的问题,增设运移装置、重置圆筒筛筛孔排布与大小,以保持气流分布均匀性、改善杂质通过性,提高了气力式圆筒筛膜杂分离机筛分性能的稳定性。对圆筒筛内膜杂混合物进行运动分析,选取圆筒筛转速、进风管风速、气流角度为试验因素,以膜中含杂率和杂中含膜率作为评价指标,运用BoxBenhnken试验设计原理设计三因素三水平试验,分析各因素对膜杂分离作业性能的影响。结果表明,各因素对膜中含杂率影响主次顺序依次为:进风管风速、圆筒筛转速、气流角度;各因素对杂中含膜率影响主次顺序依次为:圆筒筛转速、进风管风速、气流角度。利用Design-Expert软件响应曲面图,进行了综合影响效应分析,得出当圆筒筛转速为23.8 r/min、进风管风速为5.9 m/s、气流角度为2.7°时,膜中含杂率为10.60%,杂中含膜率为0.133%。对上述优化结果进行试验验证,得出在该参数组合下的膜中含杂率平均值为10.54%,杂中含膜率平均值为0.132%,表明该整机优化方案可行。Aiming at the problem that large fluctuation range of the screening performance of the pneumatic cylindrical sieve membrane impurity separator,additional migration device and reset the layout and size of cylindrical screen holes to maintain the uniformity of airflow distribution,improve the trafficability of impurities,and improve the screening performance stability of the pneumatic cylinder sieve film impurity separator.Based on the analysis of the movement of the membrane hybrid mixture in the cylindrical sieve,the rotational speed of cylinder sieve,wind speed of inlet pipe,and inclination of airflow were selected as test factors.The impurity rate in the film and the film content in the impurity were used as evaluation indexes.A three-factor and three-level test was designed in principle to analyze the influence of each factor on the quality of the membrane impurity separation operation.The test results showed that the order of influence on the impurity content in the film was:air inlet pipe speed,rotational speed of cylinder sieve and air flow angle;the order of influence on impurity content in the film was:cylinder screen speed,air inlet pipe speed and air flow angle.The comprehensive effects of various factors on the response index were analyzed by using Design-Expert software surface response diagram,which showed that the optimal rotating speed of cylinder sieve,wind speed of the inlet pipe and the inclination of the airflow were 23.8 r/min,5.9 m/s and 2.7°,respectively,the theoretical minimum impurity rate in the film and the film content in the impurity for the optimal design were 10.60%and 0.133%,respectively.Then the secondary test was performed to verify the obtained optimal values.It was found that the impurity rate in the film and the film content in the impurity for the optimal design were 10.54%and 0.132%,respectively.The results indicated that the optimization scheme of the device was feasible.

关 键 词：膜杂混合物 分离机 运移装置 改进设计 试验 

分 类 号：S223.5[农业科学—农业机械化工程]