不同含水率对油莎豆物理特性及力学特性的影响

doi:10.13733/j.jcam.issn.20955553.2022.01.012

摘要/Abstract

摘要： 为探究不同含水率条件下油莎豆的物理特性及力学特性，减少油莎豆在收获、干燥、清洗等过程中受到挤压摩擦而产生的机械损伤，开展5种含水率(20%，25%，30%，35%，40%)水平下油莎豆的主要物理特性及力学特性试验。试验结果表明，含水率在20%~40%范围内，随着含水率的升高，油莎豆平均几何粒径显著增加；滚动摩擦系数呈线性增加；而最大破碎力呈先增大后减小趋势，在含水率为30%时达到最大值210.169 N。根据试验结果，分别拟合得到油莎豆压缩特性、摩擦特性、休止角与含水率的关系方程，为油莎豆播种、收获、干燥、清洗等装备设计及参数优化提供技术依据。

关键词: 油莎豆, 物理特性, 力学特性, 含水率

Abstract: In order to explore the physical and mechanical properties of Cyperus esculentus under different moisture content conditions to reduce the mechanical damage caused by extrusion friction during harvesting, drying, and cleaning, this paper carried out the main physical and mechanical properties tests of Cyperus esculentus under five moisture content levels (20%, 25%, 30%, 35%, 40%). The test results showed that, with the increase of moisture content in the range of 20% to 40%, the average geometric particle size of Cyperus esculentus increased significantly. The rolling friction coefficient increased linearly. The maximum crushing force increased firstly and then decreased, reaching a maximum of 210.169 N when the moisture content was 30%. According to the test results, the relationship equations between compression characteristics, friction characteristics, repose angle, and moisture content of Cyperus esculentus were fitted, providing a technical basis for the design and optimization of equipment for sowing and harvesting, drying, and cleaning of Cyperus esculentus.

Key words: Cyperus esculentus, physical characteristics, mechanical characteristics, moisture content

中图分类号:

S565.9

何勋, 吕严柳, 王万章, 周正, 何豪, 郭海钦. 不同含水率对油莎豆物理特性及力学特性的影响[J]. 中国农机化学报, 2022, 43(1): 80-85.

He Xun, Lü Yanliu, Wang Wanzhang, Zhou Zheng, He Hao, Guo Haiqin.. Effects of moisture content on physical and mechanical properties of Cyperus esculentus[J]. Journal of Chinese Agricultural Mechanization, 2022, 43(1): 80-85.

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