| Design and experiment of wheat belt seed bed preparation device with subsoiling and vertical rotation combination |
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| DOI：10.7606/j.issn.1000-7601.2025.06.29 |
| Key Words: vertical rotary tillage seed bed preparation wheat sowing soil crushing rate discrete element method |
| Author Name | Affiliation | | YANG Pengkun | College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHENG Zhiqi | College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | JU Xiaoteng | College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHAO Pengfei | College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | FU Zuoli | College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | HUANG Yuxiang | College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Shaanxi Agricultural Equipment Engineering Research Center, Yangling, Shaanxi 712100, China |
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| Abstract: |
| To explore the construction of a “fine on top and coarse at bottom” soil tillage layer structure, a deep loosening and vertical rotary combined seedbed preparation device suitable for wheat strip sowing in the northwest region was designed by combining deep loosening and vertical rotary technologies. This device has both deep soil loosening and shallow soil crushing functions, and it can adjust the relative position of the knife and the shovel and obtain the torque data of the vertical rotary knife. Through force analysis, it was determined that the forward speed, rotational speed, deep loosening depth, and the distance between the knife and the shovel are the key working parameters. Using a discrete element simulation model and orthogonal rotation combination test method, the operation parameters were optimized with soil crushing rate, resistance, torque, and total power as indicators. The simulation results showed that when the rotational speed of the vertical rotary knife was 265 r·min-1, the forward speed was 6.63 km·h-1, the distance between the knife and the shovel was 80 mm, and the deep loosening depth was 232 mm, the soil crushing rate reached 98%, the torque of the vertical rotary knife was 47.36 N·m, the forward resistance of the machine was 491.95 N, and the total power was 2.22 kW. The field test results showed that the machine had good passability, with a soil crushing rate of 91.52%, a torque of the vertical rotary knife of 49.15 N·m, a forward resistance of the machine of 516.52 N, and a total power of 2.32 kW for single\|row operation, meeting the agronomic requirements. |
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