D200型秸秆纤维制取机原料供给系统优化设计与试验  

Optimal Design and Experiment for Raw Material Supply System of D200 Straw Fiber Extruder

作　　者：刘环宇[1] 陈海涛[1] 侯磊[1] 张颖[1] 

机构地区：[1]东北农业大学工程学院,哈尔滨150030

出　　处：《农业机械学报》2017年第3期92-98,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十二五"国家科技支撑计划项目(2012BAD32B02-5)

摘　　要：为提高D200型秸秆纤维制取机工作效率,实现对农作物秸秆物料的浸泡、清洗及连续稳定的输送,解决人工喂料时劳动强度大、喂料不均匀等问题,设计了与D200型秸秆纤维制取机相配套的原料供给试验装置。在对浸泡装置、搅拌装置和捞取装置间配合关系及工作原理分析的基础上,以单个耙齿为研究对象,分析了耙齿与秸秆的作业过程,建立了捞取量的数学模型,找出了影响捞取量的主要因素。应用L16(45)正交试验方法,以输送带线速度、耙齿齿数、搅拌桨转速为试验因素,以捞取效率及其变异系数为评价指标实施试验。试验结果表明:输送带线速度、耙齿齿数、搅拌桨转速对捞取效率影响极显著(P<0.01);输送带线速度对捞取效率变异系数影响极显著(P<0.01)。同时利用模糊综合评价方法对试验指标进行综合评价,确定影响综合评价的主次顺序为:输送带线速度、搅拌桨转速、耙齿齿数;最优参数组合为:输送带线速度0.6 m/s、搅拌桨转速40 r/min、耙齿齿数8根。此时,单位时间内捞取效率为1 111.2 kg/h,变异系数为0.124,满足生产要求。The D200 straw fiber extruder developed by Northeast Agricultural University is used mainly in fiber processing to get crop straw expanded by utilizing physical extrusion method, which can realize clean, efficient and high value utilization of crop straw. In order to improve the efficiency in soaking, cleaning, continuous and stable conveying of crop straw material and solve the problems of strong labor intensity when it is fed artificially and nonuniformly, the development of a matched raw material supply device is absolutely necessary. This supply device mainly consisted of soaking device, stirring device and fishing conveyor device, in which the fishing conveyor device functions as a critical component. Based on analysis of the cooperating relationship among three systems （referring to soaking, stirring and fishing systems） , a fishing rake was selected as research object to establish a mathematical model of fishing amount by analyzing the kinematic process between harrow tooth and straw. Belt linear velocity, harrow tooth number and rotating speed of agitator were proved to be the effective factors affecting fishing efficiency. Critical condition that the straw was not thrown out from harrow was found through force analysis when straw was separated from the water surface. The test material was Dongnong No. 425 rice straw. Experimental investigations were carried out with the method of LI6 （ 45 ） orthogonal test to obtain the optimal parameter combination. Meanwhile, the belt linear velocity, harrow tooth number and rotating speed of agitator were supposed to he the main influence factors. Fish efficiency and variable coefficient of fishing efficiency were chosen as the evaluating indicator. The results showed that belt linear velocity, harrow tooth number and rotating speed of agitator had very significant effect on fishing efficiency （ P 〈 0.01 ） ; belt linear velocity had very significant effect on variation coefficient of fishing efficiency （ P 〈 0. O1 ）. Subsequently, by using fuzzy

关 键 词：秸秆 纤维制取机 原料供给 优化设计 正交试验 

分 类 号：TH237.1[机械工程—机械制造及自动化]