不同含水率下花生荚果静摩擦系数测定

Determination of static friction coefficient of peanut pod under different moisture content

为研究含水率对花生荚果静摩擦系数的影响,以花生主产区主要种植品种宛花2号、大白沙171为试验物料,利用DGF30/7-IA型电热鼓风干燥箱对花生荚果进行含水率调控(10.18%、13.57%、16.28%、20.66%、25.85%);利用静力学原理构建的静摩擦系数斜面仪测定花生荚果的静摩擦系数;采用单因素试验,分别分析花生品种、接触材料、荚果含水率对花生荚果静摩擦系数的影响。试验结果表明在含水率各水平下不同品种花生荚果与Q235钢板、大孔筛、小孔筛的静摩擦系数变化趋势相同;花生荚果静摩擦系数随含水率的增大而增大,宛花2号在不同含水率下与Q235钢板、大孔筛、小孔筛的静摩擦系数变化范围分别为0.388~0.611、0.494~0.819、0.553~0.975,大白沙171在不同含水率下与Q235钢板、大孔筛、小孔筛的静摩擦系数变化范围分别为0.42~0.622、0.608~0.822、0.619~0.892。在含水率各水平下花生荚果与不同接触材料的静摩擦系数变化趋势相同,其中大白沙171的静摩擦系数小于宛花2号;大白沙171花生荚果的流动性较好;研究结果可为花生循环干燥设备仿真模拟参数设置及优化设计提供参考依据。

In order to study the effect of moisture content on the static friction coefficient of peanut pods, taking the main peanut varieties Wanhua 2 and Dabaisha 171 as experimental materials, the moisture content of peanut pods was regulated by DGF30/7-IA electric blast drying oven. The static friction coefficient of the peanut pod was measured by the static friction coefficient inclinometer based on the principle of statics. The effects of peanut varieties, contact materials, and pod moisture content on the static friction coefficient of peanut pods were analyzed by a single factor test. The results showed that the variation trend of the friction coefficient between peanut pods of different varieties and Q235 steel plate, large hole sieve, and small hole sieve was the same at all levels of water content. The static friction coefficient of the peanut pod increases with the increase in water content. The variation range of friction coefficient between Wanhua 2 and Q235 steel plate, macro sieve, and small sieve under different water content(10.18%, 13.57%, 16.28%, 20.66%, and 25.85%) is 0.388-0.611, 0.494-0.819, and 0.553-0.975 respectively. The variation range of friction coefficient between Dabaisha 171 and Q235 steel plate, macro sieve, and small sieve under different water content are 0.42-0.622, 0.608-0.822, and 0.619-0.892, respectively. The variation trend of the friction coefficient between peanut pod and different contact materials is the same at all levels of water content. The static friction coefficient of Dabaisha 171 is less than that of Wanhua 2, and the fluidity of the peanut pod of Dabaisha 171 is better. The results can provide a reference for the simulation parameter setting and optimization design of peanut circulating drying equipment.