Design and Experiment on Machine for Rice Straw Full Quantity Deep Buried into Field

Aiming to prevent the backfilling of soil in front of the machine due to the reverse-rotary during straw deep buried into field. The rice straw full quantity deep buried and returned machine was designed, combined with the operation process of rice straw deep buried into the field. By analyzing the process of reverse-rotary operation, the reason of soil backfilling in front of the machine was explored and the mathematical model of relative position between soil and cutting tool in each stage of machine work were established and the mathematical model was established by Matlab, the angle of bending line was defined as 55°, the rotation speed of the cutter roller was defined as 190 r/min, the bending angle was defined as 77° and the width of the cutting tool was defined as 80 mm. At the same time, the arrangement of the cutting tool was designed. The completed machine configuration field tests showed that the machine could complete the operation under different operating environments with stubble height less than 260 mm and operating speed less than 3 km/h, the problem of soil backfilling in front of the machine was solved and the returning rate could be reached more than 85%, soil fragmentation rate and ground flatness could be reached more than 95%. All the indexes could meet the technical requirements and the adaptability test was carried out under the relatively wet and sticky working environment. All the indexes were higher than the agricultural requirements, which proved the applicability of the machine and tools. © 2020, Chinese Society of Agricultural Machinery. All right reserved.