完整稻秆卷压过程应力松弛试验

为深入研究完整稻秆在卷捆压缩过程中的流变特性,该文利用自制的钢辊式圆捆机卷压试验台进行了完整稻秆卷压过程应力松弛试验研究。选择稻秆含水率、草捆干物质质量、卷捆钢辊转速、稻秆喂入速度为试验因素,并以应力松弛时间和平衡弹性模量作为应力松弛特性评价指标,进行4因素5水平正交旋转组合试验。结果表明：完整稻秆卷压过程应力松弛模型可用1个Maxwell单元和1个弹簧并联组成的三元件方程表示;各因素对应力松弛时间贡献率排序依次为稻秆含水率、草捆干物质质量、稻秆喂入速度、卷捆钢辊转速;对平衡弹性模量贡献率排序依次为草捆干物质质量、稻秆含水率、稻秆喂入速度、卷捆钢辊转速;当稻秆含水率为65%、草捆干物质质量为1...

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Bibliographic Details
Published in农业工程学报 Vol. 31; no. 8; pp. 76 - 83
Main Author 雷军乐 王德福 张全超 杨星 李利桥 李超
Format Journal Article
LanguageChinese
Published 黑龙江职业学院工程学院，哈尔滨 150080%东北农业大学工程学院，哈尔滨 150030 2015
东北农业大学工程学院，哈尔滨 150030
河南农业大学机电学院，郑州 450002%东北农业大学工程学院,哈尔滨,150030
Subjects
优化
卷压过程
圆捆机
完整稻秆
应力松弛
流变
rheology
卷压过程
应力松弛
optimization
优化
intact rice straw
圆捆机
流变
完整稻秆
round baler
compression process
stress relaxation
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ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2015.08.012

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Summary:为深入研究完整稻秆在卷捆压缩过程中的流变特性,该文利用自制的钢辊式圆捆机卷压试验台进行了完整稻秆卷压过程应力松弛试验研究。选择稻秆含水率、草捆干物质质量、卷捆钢辊转速、稻秆喂入速度为试验因素,并以应力松弛时间和平衡弹性模量作为应力松弛特性评价指标,进行4因素5水平正交旋转组合试验。结果表明：完整稻秆卷压过程应力松弛模型可用1个Maxwell单元和1个弹簧并联组成的三元件方程表示;各因素对应力松弛时间贡献率排序依次为稻秆含水率、草捆干物质质量、稻秆喂入速度、卷捆钢辊转速;对平衡弹性模量贡献率排序依次为草捆干物质质量、稻秆含水率、稻秆喂入速度、卷捆钢辊转速;当稻秆含水率为65%、草捆干物质质量为17 kg、卷捆钢辊转速为257 r/min、稻秆喂入速度为1.6 kg/s时,应力松弛时间和平衡弹性模量可分别达最佳值17.08 s和4.01 k Pa。试验结果可为圆型打捆机对完整稻秆的卷压工艺优化及其压缩机理分析提供必要的理论与技术支持。
Bibliography:11-2047/S
Lei Junle, Wang Defu, Zhang Quanchao, Yang Xing, Li Liqiao, Li Chao （1. College of Engineering, Northeast Agricultural University, Harbin 150030, China; 2. College of Engineering, Heilong/iang vocational college, Harbin 150080, China; 3. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China）
rheology;stress relaxation;optimization;intact rice straw;round baler;compression process
In recent years, rice straw as a kind of renewable material is being used widely in China. The rheologic characteristics of crop straw have great effect on the power consumption, productivity and compression process of compressing equipment, as well as on the bale durability. At present, a lot of researches have been done by many domestic and foreign scholars on the compression rheologic characteristics, but the researches have been aimed at the rectangular baler instead of the steel-roll round baler, and the test materials are mainly concentrated on corn straw, wheat straw an
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2015.08.012