小型玉米秸秆收割机的仿真与试验

针对甘肃地区玉米种植地块小且分散,人工收获劳动强度大,生产率低等问题,设计并研制了一种由传动系统、切割装置、扶禾器等组成的小型玉米秸秆收割机。利用Solid Works和ADMAS对整机进行虚拟仿真,得到收割机的性能指标,并对样机进行田间收割试验。结果表明:收割机切割装置转轴的总动能为1.547×105 J,转轴的总冲量为3 858 N·s;在不清除地膜和杂草的条件下,平均割茬高度为1.76 cm,玉米秸秆的平均铺放合格率达95.59%,各装置协调、平稳、可靠,平均工作效率可达5.10 hm2/h。通过整机虚拟仿真得到的转轴动能和冲量可作为收割机切割效果的性能指标。

Simulation analysis and test of the small maize straw harvester

Aimed at the problems in small and scattered corn field, i.e. mainly manual harvest, labor intensity, low productivity in gansu area, the small grain corn stalk harvester is designed and developed, which mainly composed of the transmission system, the cutting device and the grain lifer. Using SolidWorks and ADMAS virtual simulation the whole machine to get harvester performance indicators, and the corn straw harvest experiments are conducted on double ridge sowing fully-mulching dry land. The result show that the total kinetic energy of harvester cutting device axis is 1.547×105 J, and the total impulse is 3 858 N?s. Under the condition without to clear mulch and weeds, the average stubble height is 1.76 cm, and the corn straw qualified rate is reached 95.59%, as well as the device operating coordinatedly, stablly and reliablly. The average work efficiency can reach to 5.10 hm2/h. The kinetic energy and impulse of the rotating shaft can be used as the performance indicators of harvester cutting property.