环模秸秆成型机压辊半径的优选与试验  

Optimization and test of roller radius of ring die straw forming machine

作　　者：王春华[1] 宋超[1] 朱天龙[1] 王川[1] 

机构地区：[1]辽宁工程技术大学机械工程学院,阜新123000

出　　处：《农业工程学报》2013年第15期26-33,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(51104082)

摘　　要：生物质致密成型技术是生物质能转换的方式之一,秸秆成型机是生物质秸秆致密成型的主要机械。目前,环模秸秆成型机的机械效率较低,在研究环模秸秆成型机机械效率的过程中发现草料一次压进距离与压辊驱动力转矩比值与成型机的机械效率成正比关系。该文通过matlab软件计算出在不同压辊半径与环模半径比值时环模秸秆成型机的草料一次压进距离与压辊驱动力转矩比值,并绘制了其变化曲线,得出在压辊半径与环模半径的最优比为0.4时,成型机的机械效率达到最高,为85.82%。验证了在压辊半径与环模半径的最优比为0.4时,生产率达到最高值为2.28t/h。研究结果可为秸秆成型机压辊半径的优化选取提供理论依据。Biomass briquette technology is one of the ways of biomass energy conversion. A straw briquetting machine is a main machine of straw biomass briquette. At present, the ring die straw briquetting machine efficiency is low, In order to solve the problems of low efficiency of the ring die straw forming machine when briquetting biomass, the paper makes an analysis for the rolled compaction process of the pressure roller. Research for increasing the working efficiency of a ring die straw forming machine shows that the ratio of forage again pressed into the distance and pressure roller drive torque ratio size is related to the working efficiency of a ring die straw forming machine. In the mechanical analysis of rolled compacting biomass by the pressure roller, the paper establishes its mechanical model and mathematical model., The paper first establishes a mathematic mold of working efficiency of ring die straw forming machine and the ratio of the pressure roller, setting the ratio of circular mold at 275 mm, arranges different values of the pressure roller evenly（10mm^250mm,step value： 5mm） and different friction coefficients between biomass and the pressure roller, and then calculates and maps curves of the efficiency of a ring die straw forming machine and the ratio of the pressure roller and circular’s mold radius. The experiment takes corn stalk as the object of study. Effects of moisture content of biomass at home and abroad as well as the biomass particle size on machine efficiency and biomass quality have been studied a lot. Considering the grass block （dry and wet） each index power density, the maximum extrusion force, press consumption, productivity, to determine the water content is about 29%, the maximum extrusion force is small, low power consumption, suitable density, high productivity. The maximum extrusion force of die hole is f=11590N -1 .and the best moisture is 29%. due to the different coefficient of the sliding friction of different particle size of corn straw and roller. With the incre

关 键 词：生物质 加工 效率 秸秆成型机 压辊半径 

分 类 号：S219.05[农业科学—农业机械化工程]