水田刀片的结构参数设计与台架试验研究。

Structure parameter design and bench test research of paddy field blades.

机构信息

College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

Shandong Academy of Agricultural Machinery Sciences, Shandong, 250103, China.

出版信息

Sci Rep. 2022 Aug 30;12(1):14733. doi: 10.1038/s41598-022-19115-6.

DOI:10.1038/s41598-022-19115-6

PMID:36042267

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9427756/

Abstract

Aiming at the problems of high labor intensity and low efficiency in manual operation during the pulping process of rice seedling nursing in thin mud in hilly and mountain areas, this paper designed a new type of paddy field blade for seedling nursing, and utilized a rice nursery pulper to help manual operation complete the pulping process. It created a mathematical model of mud-throwing mass and operating power in the operation process of paddy field blade, and obtained the main structure factors that influenced the mud-throwing mass and operating power of paddy field blade, which included the area of mud splashing board, the angle between the front cutting edge and the mud splashing board, and the inclination angle between the front cutting surface and the mud splashing board. To further analyze the degree of influence of the blade's main structure parameters on mud-throwing mass and operating power, it used EDEM discrete element simulation software to establish a discrete element simulation model of paddy field blade and mud particle system, performed simulation analysis with the method of orthogonal experimental design, and conducted a bench test for comparison. The results showed that: (1) the degree of influence of the three structure parameters on mud-throwing mass and operating power from large to small in order was the area of mud splashing board > the inclination angle between front cutting surface and mud splashing board > the angle between front cutting edge and mud splashing board; (2) the maximum relative error for mud-throwing mass between simulation analysis and bench test was 4.53%, and that for operating power was 8.67%; and (3) three reference parameters combinations were selected by P-1/M graph, the mud-throwing mass of the three combinations was 40.43%, 27.52% and 0.16% higher than that of the original blade, and the power consumed was 13.99%, 21.83% and 36.65% lower than that of the original blade, indicating that the new paddy field blade had good operating performance.

摘要

针对丘陵山区水稻薄泥浆育秧盘泥作业中人工操作劳动强度大、效率低的问题，设计了一种新型水田刀，并利用水稻育秧碎土机辅助人工操作完成盘泥作业。建立了水田刀作业过程中抛泥量和作业功率的数学模型，得到了影响水田刀抛泥量和作业功率的主要结构因素，包括抛泥板面积、前刃口与抛泥板的夹角、前切削面与抛泥板的倾斜角。为进一步分析刀片主要结构参数对抛泥量和作业功率的影响程度，采用 EDEM 离散元仿真软件建立水田刀和泥粒系统离散元仿真模型，采用正交试验设计方法进行仿真分析，并进行台架试验对比。结果表明：（1）3 个结构参数对抛泥量和作业功率的影响程度大小依次为抛泥板面积＞前切削面与抛泥板的倾斜角＞前刃口与抛泥板的夹角；（2）抛泥量仿真分析与台架试验的最大相对误差为 4.53%，作业功率的最大相对误差为 8.67%；（3）通过 P-1/M 图选取了 3 组参考参数组合，这 3 组组合的抛泥量比原刀片分别高出 40.43%、27.52%和 0.16%，消耗功率比原刀片分别降低了 13.99%、21.83%和 36.65%，表明新型水田刀具有较好的作业性能。