苜蓿在压捆过程中草片密度变化规律的研究  

Study on the Density Variation Law of Alfalfa Grass Sheet during Baling Process

作　　者：李旭英[1] 张小志[1] 杜建民[1] 康文彪[1] 

机构地区：[1]内蒙古农业大学机电工程学院,呼和浩特010018

出　　处：《农机化研究》2015年第1期192-195,共4页Journal of Agricultural Mechanization Research

基　　金：内蒙古自然科学基金项目(2011MS0724)

摘　　要：以优质干苜蓿为研究对象,在草物料压捆试验台上进行5种截面的压捆试验,布设了压力传感装置和位移传感器,采集整个压缩过程中作用在苜蓿草片上的压缩力与草片的厚度及草片所在位置,通过数据分析处理,得到了苜蓿在压捆过程中草片密度分布规律。结果表明:不同截面下草片在压捆室内压紧时和变形恢复后的密度分布规律基本相同,在压捆过程中草片的密度可分为3个区域—致密区、密度平稳区、密度降低区;并指出在密度平稳区,有一个自然形成的应力松弛过程,使草片内的弹性恢复应力减小,打捆最好在此区进行,有利于提高草捆形态的稳定性。Taking high quality alfalfa hay as the research object, we carried out the test at herbage material baling test bench in different cross sections, and we had emplaced mobile pressure sensing device and displacement sensors, and we also had collected the signals of thickness, compression force and location of grass sheet through virtual instrument aequisition system in the process of compression. Through the data analysis and processing, we obtained compression and Uynamic distribution law of grass sheet on alfalfa in the process of baling. Results show that the density distribution law are also substantially three sections in similar laws during compressed and the process of baling - compressed recovery, and the density area of grass sheet can be divided into three sections in the process of baling - compressed section, stable density section, density recovery section. Noted that there is a process of stress relaxation which is natural formation in stable density section, and the process made the elastic recovery stress of grass sheet decreasing, therefore, it is best to conduct baling in this section, because it helps to improve the stability of the bale shape.

关 键 词：压捆机 密度 压捆 苜蓿 

分 类 号：S817.1[农业科学—畜牧学]