Authors

Abstract

Straw returning is an effective option to avoid straw open burning during harvest seasons and has been widely implemented all over the world. This study developed a plowing and rotary tillage combined machine, which could bury the straw, break the soil and prepare the soil for planting in one operation. The machine consists of plowing component, rotary component and power transmission system. The plow component was designed by the response surface analysis, which analyzed the influence of different contour line of plow surface on the burying effect and the working resistance at the speeds of 0.8m/s, 1.0m/s and 1.2m/s respectively. In combination with the working effect of the plow component, the rotary blades were arranged by the method of 4n±2. The orthogonal test results showed that the C-plow surface has the best burying effect at 1m/s. The field tests showed that the machine had a straw burying rate of 91%, surface roughness was 0.564, fuel consumption was 43.41 kg/ha and the soil-breaking rate reached 96.08%; all the performance indexes met the design requirements. The study can provide theoretical reference for parameters design of plowing and rotary tillage combined machine. 作物秸秆还田是避免秸秆露天焚烧的一种有效途径，在全球已经广泛应用。本文设计了一种秸秆犁翻旋整联合作业机，一次下地作业就可完成秸秆翻埋、碎土、整地等多道作业工序。机具主要由犁翻部件、旋整部件和传动系统组成。犁翻部件的设计基于对不同犁体曲面在0.8m/s、1.0m/s和1.2m/s的速度下犁翻部件翻埋效果及作业阻力进行响应面法分析。结合犁翻部件的作业效果，旋整刀采用4n±2的方式进行排列。正交试验结果表明，犁体曲面C在1m/s的作业速度下达到最好翻埋效果。田间试验表明，该机具的秸秆翻埋率为91％，土壤粉碎率为96.08％，地表平整度为0.564，稳定作业油耗为每公顷43.41千克，所有性能指标均满足设计要求。本文的研究结果为秸秆犁翻旋整联合作业机参数的设计提供了理论参考

Abstract in Chinese

作物秸秆还田是避免秸秆露天焚烧的一种有效途径，在全球已经广泛应用。本文设计了一种秸秆犁翻旋整联合作业机，一次下地作业就可完成秸秆翻埋、碎土、整地等多道作业工序。机具主要由犁翻部件、旋整部件和传动系统组成。犁翻部件的设计基于对不同犁体曲面在0.8m/s、1.0m/s和1.2m/s的速度下犁翻部件翻埋效果及作业阻力进行响应面法分析。结合犁翻部件的作业效果，旋整刀采用4n±2的方式进行排列。正交试验结果表明，犁体曲面C在1m/s的作业速度下达到最好翻埋效果。田间试验表明，该机具的秸秆翻埋率为91％，土壤粉碎率为96.08％，地表平整度为0.564，稳定作业油耗为每公顷43.41千克，所有性能指标均满足设计要求。本文的研究结果为秸秆犁翻旋整联合作业机参数的设计提供了理论参考