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Discrete Element-Based Design of a High-Speed Rotary Tiller for Saline-Alkali Land and Verification of Optimal Tillage Parameters

Shuai Zheng, Tong Lu, Jie Liu, Yu Tian, Miaomiao Han, Muhao Tai, Shuqi Gao, Tao Liu, Dongwei Wang () and Zhuang Zhao ()
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Shuai Zheng: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Tong Lu: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Jie Liu: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Yu Tian: Yellow River Delta Intelligent Agricultural Machinery Equipment Industry Academy, Dongying 257300, China
Miaomiao Han: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Muhao Tai: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Shuqi Gao: Academician Workstation of Agricultural High-tech Industrial Area of the Yellow River Delta, National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, Dongying 257345, China
Tao Liu: Qingdao Agricultural Machinery Production and Distribution Association, Qingdao 266109, China
Dongwei Wang: College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Zhuang Zhao: College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China

Agriculture, 2025, vol. 15, issue 3, 1-27

Abstract: Aiming at the saline soil in Binhai New Area, which is solid and sclerotic, and addressing the problem of poor quality and low efficiency of traditional rotary tillage, this research designed a high-speed rotary tiller that can realize the high-speed rotation of knife rollers to cut. The average operating speed is higher than that of the ordinary rotary tiller. We analyzed the rotary tiller operating conditions and rotary tiller knife cutting process and conducted a movement trajectory theoretical analysis to determine the rotary tiller’s high-speed operating speed relationship. The working process of a high-speed rotary tiller was simulated using EDEM software. The experimental indicators included the soil-crushing rate and surface smoothness after tilling. The experimental factors included the forward speed of the machine, the rotational speed of the blade roller, and the tilling depth. An orthogonal experiment was performed to establish regression equations for the soil-crushing rate and surface smoothness. Using Design-Expert analysis software, we obtained the following optimal combination of parameters: a knife roller speed at 310 r/min, tillage depth of 13.2 cm, and machine forward speed of 4.8 km/h. At this time, the simulation values of the soil fragmentation rate and surface flatness were 90.6% and 18.2 mm, respectively. When determining the optimal knife roller speed of 310 r/min, a transient structural simulation under the mesh bevel gear transient was conducted. The simulation analysis showed that the maximum equivalent stress value was 584.57 MPa, which was smaller than the permissible stress of 695.8 MPa, meeting the bevel gear meshing strength requirements. Under the optimal combination determined by a field comparison test, the results show that the values of the high-speed rotary tiller operation after the soil-breaking rate, tillage depth, the tillage depth stability coefficient, and vegetation cover were 89.3%, 14.2 cm, 92.8%, and 90.3%. The land surface flatness was 16.4 mm, which is superior to the ordinary rotary tiller operation effects, meeting the agronomic requirements for pre-sowing land preparation for peanuts in the saline land of Binhai New Area.

Keywords: saline-alkali land; high-speed rotary tiller; rotary plowing; operating efficiency (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: 2025
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