预切式蔗种的基本参数试验测定与研究

Experimental Measurement and Research on the Basic Parameters of Precut Sugarcane Seeds

本文通过对预切式青皮甘蔗种块的基本物理参数以及力学性质的试验研究,得出甘蔗种块材料在各种载荷作用下极限强度,为预切式甘蔗播种机设计时的甘蔗种基本物理参数需求和蔗种在播种机中的动力学机理研究提供参考。希望能够对甘蔗的机械化精量播种作业方式研究起到一定促进作用。试验测定的结果为:基本物理参数:甘蔗种块长度为55~65 mm的平均重量为10.96 g;直径32.21 mm;密度1.05 g/mm3;含水率75.35%;力学特性参数:蔗皮、蔗芯轴向、径向拉伸强度为43.9、1.2、1.2、0.3 MPa;甘蔗秆轴向、径向压缩强度分别为5.6、1.6 MPa;甘蔗秆轴向、径向剪切强度分别为1.0、0.7 MPa;茎秆弯曲强度8.7 Mpa。滑动摩擦角平均值为30°~35°。

The basic physical parameters and mechanical properties of precut sugarcane seed block were studied in this paper.The ultimate strength of sugarcane seed material under various loads was obtained,which provides a reference for the basic physical parameters of sugarcane seeds and the dynamic mechanism of sugarcane seeds in the precutting sugarcane planter design.It is hoped that it can promote the study of mechanized precision sowing of sugarcane.The results showed that:basic physical parameters:the length of sugarcane seed block was 55~65 mm,the average weight was 10.96 g,the diameter was 32.21 mm,the density was 1.05 g/mm3,and the moisture content was75.35%.Mechanical characteristic parameters:the axial and radial tensile strength of sugarcane skin and sugarcane core was 43.9、1.2 and 0.3 Mpa,the axial and radial compression strength of the stalk were 5.6 and 1.6 Mpa.The axial and radial shear strength of the stalk were 1.0 and 0.7 Mpa,and the bending strength of stem is 8.7 Mpa.The average value of sliding friction angle is 30~35°.