Authors

Abstract

Stalk returning technology was an important way to preserve soil nutrients and reduce soil erosion. It was of great significance to improve the stalk chopping quality, reduce power consumption. On the basis of the previous research, the finger wheel and cutting disc combined device for stalk returning was developed, mainly composed of the sawtooth blade group, the finger wheel and the stalk lifting grid. The stalk was fed into the cutting area of the sawtooth blades by the rotation of the finger wheel, and the operation of the stalk chopping was completed under the combination of the sawtooth blade group and the finger wheel. The movement of stalks in the device with finger wheel and sawtooth blades was analysed by high speed photography, and the speed of finger wheel, the speed of sawtooth blade group, the stalk feeding speed had a great influence on the movement of the stalks. Through orthogonal test and verification test, the clamping angle was 20°, the speed of sawtooth blade group was 800 r/min, the stalk feeding speed was 1.45 m/s, the speed of finger wheel was 110 r/min, the cut length qualified rate was 92.47% and the cutting power was 529.97 W. The test results met the quality requirements of the Chinese national standard. The related research can provide reference for the research of stalk returning device.

Abstract in Chinese

秸秆还田技术是保持土壤养分、减少土壤侵蚀的重要手段。提高秸秆切碎质量，降低能量消耗具有重要意义。在前期研究的基础上，研制了拨禾指轮-锯盘组合式秸秆还田装置，主要由锯齿刀片组、指轮和分禾栅板组成。秸秆通过指轮的转动送入锯齿刀片组的切割区，在锯齿刀片组和指轮的组合下完成秸秆的切割。通过高速摄影分析了秸秆在指轮和锯齿刀片组中的运动，得到指轮转速、锯齿刀片组转速、秸秆进给速度对秸秆的运动有很大的影响。通过正交试验和验证试验，确定钳住角为20°，锯齿刀片组转速为800 r/min，秸秆进给速度为1.45 m/s，指轮转速为110 r/min，切割长度合格率为92.47%，切割功率为529.97 W。检测结果符合中国国家标准的质量要求。相关研究可为秸秆还田装置的研究提供参考。