摘要
清选装置是燕麦脱粒机的重要工作部件,其性能直接影响整机工作性能,尤其是燕麦杂余较高时,对清选装置提出了更高的要求。为此设计一种气吸式筛分清选装置,利用风机设计理论和机构学原理完成了气吸式离心风机和振动筛机构的设计和计算,根据其驱动机构仿真要求建立了运动学分析的数学模型和Simulink模型,完成了计算机模拟。以含杂率、风机损失和筛板损失为试验指标,利用SAS软件和Design-Expert 8.0软件设计试验,开展风机吸风口风速和振动筛频率的单因素和2因素正交试验。计算机仿真结果表明,物料在筛板上作斜抛运动,抛送高度为29.31 mm,水平方向位移为11 mm,输送速度为0.298 1 m/s;单因素试验结果表明,含杂率随风机风速和振动筛频率增大而减小,清选损失随风机风速和振动筛频率增大而增大,在风机风速为0.5~1.0 m/s、振动筛频率为3.50~4.16 Hz时,含杂率低于5%,风机损失和筛板损失均低于5%;正交试验结果表明,风机风速和振动筛频率的交互效应对含杂率和风机损失影响较显著,对筛板损失不显著。获得的最优参数组合为:风机风速1.14 m/s、振动筛频率4.16 Hz时,含杂率4.576%,风机损失1.707%,筛板损失2.700%,符合清选要求。
The cleaning device is an important working part of an oat thresher, and its performance directly affects the working performance of the whole machine. Especially when the oat impurities are many, higher requirements are put forward for the cleaning device. For this purpose, in this study, an air-suction screening and cleaning device was designed. The design and calculation of an air-suction centrifugal fan and a vibrating screen mechanism were completed by using the fan design theory and mechanism principle. A mathematical model and Simulink model of kinematics analysis were established according to the simulation requirements of its driving mechanism, and a computer simulation was completed. Taking the impurity content, the fan loss and the sieve plate loss as indicators tested, SAS software and Design-Expert 8.0 software were used to design experiments, and single-factor and two-factor orthogonal tests of fan suction air velocity and vibrating screen frequency were carried out. The computer simulation results showed that an oblique throwing motion of the material occurred on the sieve plate,the throwing height was 29.31 mm, the horizontal displacement was 11 mm, and the conveying speed was 0.298 1 m/s;the single factor test results showed that the impurity content decreased with increase of the wind speed of the fan and the frequency of the vibrating screen, and the cleaning loss increased with increase of the wind speed of the fan and the frequency of the vibrating screen. When the wind speed of the fan was 0.5-1.0 m/s and the frequency of the vibrating screen was 3.50-4.16 Hz,the impurity content was less than 5%, and the loss of the fan and the sieve plate were both less than 5%;the orthogonal test results showed that the interaction effect of the wind speed and the vibrating screen frequency had a significant effect on the impurity content and the fan loss, but not on the sieve plate loss. At the same time, the optimal parameter combination was obtained: when the wind speed of the fan was 1.14 m/s, and the
作者
裴二鹏
程飞
王显
杨旭辉
王嘉伟
郑德聪
PEI Erpeng;CHENG Fei;WANG Xian;YANG Xuhui;WANG Jiawei;ZHENG Decong(College of Agricultural Engineering,Shanxi Agricultural University,Taigu 030801,China)
出处
《山西农业科学》
2022年第5期737-747,共11页
Journal of Shanxi Agricultural Sciences
基金
财政部和农业农村部:国家现代农业产业技术体系(CARS-07-D-2)
山西省重点研发计划项目(201903D221005)
山西省博士毕业生来晋工作奖励资金科研项目(SXBYKY2021074)。
关键词
燕麦
清选装置
气吸式离心风机
振动筛
响应面分析
oats
cleaning device
air-suction centrifugal fan
vibrating screen
response surface analysis
