鲜食玉米摘穗台茎秆喂入装置设计及优化
Design and Optimization of Stalk Feeding Device of Fresh Corn Picking Table

针对鲜食玉米收获机在高速作业时，摘穗后的茎秆不能顺利抛出、抛送过程茎秆堵塞等问题，以4YZT-2型自走式鲜食玉米对行收获机为研究对象，针对摘穗台的核心部件拉茎装置、抛禾装置及张紧装置进行优化设计，试验表明：增加抛禾装置(后拨禾轮和导向板)有良好的茎秆疏导作用；延长拉茎架可增加拉茎带的工作长度，在不影响工作效果的情况下将极限移速提升至21.6 km/h；利用ANSYS Workbench软件对优化后的摘穗台机架的三维参数模型进行模态分析，仿真结果显示，优化后的机架模型第1阶固有频率增至39.6 Hz，其增加幅度为41.7%，大大高于机架发生易共振变形的频率，结构优化合理，显著提高了机具作业的可靠度。
In view of the problems that the stalk after ear picking cannot be thrown out smoothly and the stalk is blocked in the throwing process when the fresh corn harvester is working at high speed, the 4YZT-2 self-walking fresh corn harvester is taken as the research object. The core components of the ear picking table, such as stem pulling device, throwing device and tensioning device, were opti-mized. The results showed that adding the straw throwing device (rear straw wheel and guide plate) had a good effect on stalk dredging, and extending the stem pulling frame could increase the working length of stem pulling belt, and the limit moving speed could be increased to 21.6 km/h without affecting the working effect. The modal analysis of the optimized three-dimensional parameter model of the picking table frame is carried out by using ANSYS Workbench software. The simulation results show that the first natural frequency is increased to 39.6 Hz, with an increase of 41.7%, which is much higher than the frequency of easy resonance deformation of the frame, and the structure optimization is reasonable, which significantly improves the reliability of machine operation.