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Analysis of Cyperus esculentus –Soil Dynamic Behavior during Rotary Tillage Based on Discrete Element Method

Zhuang Zhao, Dongwei Wang (), Shuqi Shang, Jialin Hou, Xiaoning He, Zenghui Gao, Nan Xu, Zengcun Chang, Peng Guo and Xiaoshuai Zheng
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Zhuang Zhao: College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Dongwei Wang: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Shuqi Shang: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Jialin Hou: College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Xiaoning He: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Zenghui Gao: College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China
Nan Xu: College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Zengcun Chang: College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Peng Guo: College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Xiaoshuai Zheng: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China

Agriculture, 2023, vol. 13, issue 2, 1-25

Abstract: Considering the problems of low soil fragmentation rates, high working resistance, and high energy consumption in the harvesting process of Cyperus esculentus in China, a method of Cyperus esculentus harvesting based on counter-rotation digging is proposed. The mechanism of interaction between the rotary tillage blade and Cyperus esculentus –soil is systematically investigated, and the vertical and horizontal disturbance performance of the positive and counter-rotating harvesting methods on soil and Cyperus esculentus is compared and analyzed. The results of the experiment showed that the intensity of soil and Cyperus esculentus disturbance by counter-rotation increased by 166.67% and 297.78%, respectively, and the effective disturbance time of soil and Cyperus esculentus increased by 133.33% compared to that of positive rotation. The working depth and rotation speed of the rotary tillage blade were the most significant for soil and Cyperus esculentus disturbance intensity. The working depth increased from 150 mm to 170 mm, and the soil disturbance intensity increased by 17.91% and 21.37% for positive and counter-rotating operation, respectively, and the rotation speed of the rotary tillage blade increased from 270 rpm to 330 rpm, and the soil disturbance intensity increased by 28.85% and 35.29%, respectively. Compared with the positive rotation operation, the Cyperus esculentus counter-rotation soil fragmentation rate increased by 4.09%, the Cyperus esculentus damage rate decreased by 10.69%, and the buried fruit rate decreased by 7.38%. This paper helps to understand the interaction mechanism between the rototiller and Cyperus esculentus –soil and lays a theoretical foundation for the subsequent design and optimization of the Cyperus esculentus digging device.

Keywords: rotary tillage blade; counter-rotating operation; Cyperus esculentus –soil disturbance; EDEM (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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