花生联合收获机弹齿式去土装置设计与性能试验

Experiment on Removing Soil Device with Spring Tooth of Peanut Combine Harvester

针对花生联合收获机上下摆拍式和横向摆拍式去土装置去土性能差的问题,设计了弹齿式去土装置。通过去土机理分析,确定了影响去土性能的影响因素。通过田间去土试验,建立了去土装置偏心轮转速、偏心距、弹齿臂长度与去土率和掉果率的回归方程,分析了弹齿式去土装置的去土性能。通过优化计算得出,偏心轮转速为23 r/min、偏心距为38 mm、弹齿臂长度为125 mm,去土装置的综合性能达到最优,符合设计要求。

Removing-soil devices are very important to the peanut combine harvester, and directly affect the work performance of the follow-up peanut stripping devices. According to the poor performance in removing soil of the traditional removing-soil devices used in the peanut combine harvester, a new removing soil device with spring tooth is designed. Based on the analysis of removing-soil principle, this paper analyzes the performance of removing soil and gets the regression equation between eccentric-wheel speed, eccentricity, spring tooth arm and removing soil performance index （removing soil rate and peanuts falling rate）. Finally, this paper draws a conclusion that the optimum removing soil performance cart be obtained under the condition as following： eccentric wheel speed is 23 r/min, the eccentricity is 38 mm, the length of spring tooth＇ s arm is 125 mm. Every index of the performance meets the demands of design.