青贮玉米秸秆径向和轴向剪切特性试验研究  

Experimental study on the radial and axial shear characteristics of silage corn stalk

作　　者：赵玉清 赵勇[1] 杨志 方佳梦 唐仕辉 杨慧丽 孙波 赵伟 ZHAO Yu-qing;ZHAO Yong;YANG Zhi;FANG Jia-meng;TANG Shi-hui;YANG Hui-li;SUN Bo;ZHAO Wei

机构地区：[1]云南农业大学机电工程学院,云南昆明650201 [2]昆明理工大学交通工程学院,云南昆明650093 [3]云南省高原特色农业产业研究院,云南昆明650201

出　　处：《饲料研究》2021年第17期93-96,共4页Feed Research

基　　金：云南省重大科技专项-绿色食品国际合作研究中心项目(项目编号:2019ZG009);云南省教育厅科学研究基金项目(项目编号:2020Y198);云南农业大学科技创新创业行动基金项目(项目编号:2021ZKX259)。

摘　　要：试验研究青贮玉米秸秆的剪切特性,为优化切碎揉搓装置设计提供必要的工程技术参数。设计3因素3水平正交试验,利用万能试验机对玉米秸秆进行径向和轴向剪切试验,测定剪切位置、剪切速度、刀具角度在不同水平下剪切破坏力大小,确定各因素显著性及最优组合。结果显示,玉米秸秆径向剪切破坏力为689.45~778.69 N,R值为11.54~75.20,F值为12.53~518.83,P值为0.002~0.074;玉米秸秆轴向剪切破坏力为213.99~297.27 N,R值为13.49~49.67,F值为16.70~258.09,P值为0.004~0.057。此条件下,各因素对试验指标的影响大小顺序为剪切位置>刀具角度>剪切速度。研究表明,最优组合为第5节、刀具角度35°、剪切速度300 mm/min,且轴向剪切时所需的剪切破坏力小于径向剪切时所需的剪切破坏力。The experiment studied the shear characteristics of silage corn stalks and provided necessary engineering technical parameters for optimizing the design of the shredding and rubbing device.A three-factor and three-level orthogonal test was designed,and a universal testing machine was used to conduct radial and axial shear tests on corn stalks,and the shear failure force under different levels of shear position,shear speed and cutter angle was measured.Analyze and determine the significance and optimal combination of each factor.The results showed that the radial shear destructive force of corn stalk was 689.45~778.69 N,R value was 11.54~75.20,and F value was 12.53~518.83,P value was 0.002~0.074.The axial shear destructive force of corn stalk was 213.99~297.27 N,and the R value was 13.49~49.67,F value was 16.70~258.09,P value was 0.004~0.057.Under the above condition,the order of the influence of each factor on the test index was shearing position>cutter angle>shearing speed.The experiment indicates that the best combination was section 5,cutter angle 35°,cutting speed 300 mm/min,the shear breaking force required in axial shear was less than the shear breaking force required in radial shear.

关 键 词：青贮玉米秸秆 剪切特性 正交试验 最优组合 

分 类 号：S817[农业科学—畜牧学]