摘要
对莲子的机械特性进行了测试,以研究脱壳机理,为莲子脱壳机的设计提供技术数据。用压缩试验的方法求取各种工况下莲子的机械特性,分析了莲子等级和加载速率对其破壳力的影响,同时测定了不同部位、测点破壳力的差异。结果表明:莲子破壳力与等级成线性正相关关系,相关系数为0.955;加载速率与破壳力之间没有明确的关系,其应力-应变曲线的斜率随加载速率的增加而增大,而应变随之减小;莲子“赤道”与“两极”间轮廓上不同测点的破壳力差异较大,而同一部位的圆周上各点所需破壳力相差不大。该文的研究结果为莲子加工工艺的研究开发提供了理论依据。
To research lotus seed decladding mechanism and provide technical data for designing an ideal sheller, its mechanical properties were tested, some compressive experiments were conducted to determine its mechanical properties under various conditions. The effects of loading velocity and grade on compressive crushing load （CCL） were analyzed and the differences of CCL at various loading positions and points were measured. Experimental results show that CCL is influenced by grade. The equation of the stress-strain curve was well fitted, which gave a correlation coefficient of 0. 955. With the inerease of loading velocity, the curve slope augments and the deformation lessens. With respect to rupture limit and CCL, there is no notable relationship due to the tissue of lotus seed. CCL decreases gradually from lotus seed ‘equator＇ to its ‘poles’. The stress-strain curves and CCL are very anomalous. However, at the points around the same position, the properties are homogeneous. The results provide a theoretical basis for the development of the technology for lotus seed processing.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第7期11-14,共4页
Transactions of the Chinese Society of Agricultural Engineering
关键词
压缩破坏载荷(CCL)
等级
加载速率
莲子
机械特性
compressive crushing load （CCL）
grade
loading velocity
lotus seed
mechanical property
作者简介
Xie Lijuan, Master, Ph, D. Candidate, College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070 Corresponding
Zong Li （1956-）, associate professor, College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070. Email ： cunkou@webmail, hzau. edu. cn
