玉米茎秆甩刀式切碎装置的设计与试验

针对现有穗茎兼收型玉米收获机茎秆切碎装置位于整机后部,在作业过程中茎秆被轮胎辗压,造成茎秆切碎含杂率高的问题,设计了一种可以安装在割台下方的茎秆切碎装置。对切碎装置“L”型切碎甩刀进行结构设计,对单个甩刀进行有限元静力学分析,得出甩刀的应力图和变形分布图,可知甩刀工作时所受应力和变形量均在允许范围内。对切碎装置进行田间试验,结果表明:茎秆切碎长度合格率为90.6%,茎秆含杂率为0.5%,切碎装置满足设计要求。

Design and Experiment of the Corn Stalk Throwing Type Shredding Device

In order to solve the problem that the stem chopping device of the existing ear-stalk and corn harvesting machine is located at the rear of the whole machine,the stem is rolled by the tire during the operation,which causes a high rate of stalk shredding.Stem chopping device under the header.The shredding device carries out the structural design of the"L"type shredder,and the finite element static analysis of the single shredder is carried out to obtain the stress map and deformation distribution map of the shredder.And the amount of deformation are within the allowable range.A field test was carried out on the shredding device.The test result showed that the qualified rate of the stalk shredding length was 90%,and the stalk impurity rate was 0.5%.The results showed that the shredding device met the design requirements.