Finite Element Analysis and Experimental Research on the Crushing Blade of Corn Straw Returning and Land Preparation Machine

DOI: https://doi.org/10.62517/jes.202602206

Author(s)

Qingwei Liu, Ziwen Tong, Changxi Liu, Fucheng Wang*, Jun Hu

Affiliation(s)

School of Process Engineering, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China *Corresponding Author

Abstract

In response to the problems such as severe wear of the cutting tools, poor uniformity of the crushing process, and excessive energy consumption in the operation of corn straw returning in the northeastern black soil region, this paper designs a 7-shaped crushing blade. Based on the composite failure mechanism of straw shearing and bending, the key structural parameters of the tool were optimized and a three-dimensional model was established. The static finite element analysis of the tool was conducted using ANSYS Workbench. The stress, strain and deformation distribution patterns of the tool were systematically studied. The crushing performance and operational stability of the tool were evaluated through field experiments. The results showed that the maximum equivalent stress of the tool is 204.9 MPa, and the maximum equivalent strain is 9.96×10-4. Both are concentrated at the edge of the installation hole and the adjacent area of the bending transition section. The maximum total deformation is 0.936 mm, located at the free end of the cutting working section, meeting the structural strength and stiffness requirements of agricultural machinery. In the field experiments, the average qualified rate of straw crushing was 91.5%, demonstrating good stability and consistency. This research provides a theoretical basis and engineering reference for the optimization design of the tool structure of the corn straw returning equipment and the improvement of the overall performance of the machine.

Keywords

Corn Straw; Crushing Tool; Land Preparation Machine; Finite Element Analysis

References

[1]Zhu Yanhui, Zhou Guixia, Shao Zhenjun. The Straw Returning Technology Under Conservation Tillage. Modernizing Agriculture, 2005, (09):40-41. [2]Mu Ping, Zhang Enhe, Wang Hanning, et al. Effects of Continuous Straw Return to Soil on Maize Growth and Soil Chemical and Physical Characteristics. Chinese Journal of Eco-Agriculture, 2012, 20(03): 291-296. [3]Liu Fang, Zhang Changsheng, Chen Aiwu, et al. Technology Research and Application Prospect of Straw Returning. Crops, 2012, (02):18-23. [4]Shivangi Naik, Bodhisattwa Chaudhuri. Investigating Granular Milling in a Hammer mill: Experiments and Simulation. Wit Transactions on Modelling & Simulation, 2011, (51): 121-132. [5]Tang Lei. Finite Element Analysis and Optimization of Rotary Blades Based on SolidWorks Simulation. Sichuan Agriculture and Agricultural Machinery, 2023, (05):28-30. [6]Zhu Liuxian, Yang Ling, Zhu Chao, et al. Finite Element Analysis of Mini-Tiller Rotary Tillage Based on ANSYS Workbench. Mechanical Research & Application, 2014, 27(129):88-89. [7]Wang Bin, Yu Yunfeng, Zhang Xirui. Design and Test of Counter-twin roll Banana Straw Crushing and Returning Machine. Journal of Chinese Agricultural Mechanization, 2020, 41(2): 6-12. [8]Jia Honglei, Jiang Xinming, Guo Mingzhuo, et al. Design and Experiment of V-L Shaped Smashed Straw Blade. Transactions of the Chinese Society of Agricultural Engineering, 2015, 31(01):28-33. [9]Liu Peng, He Jin, Li Yanjie, et al. Design and Experiment of Double Rollers Maize Stalk Chopping Device with Different Rotation Speeds. Transactions of the Chinese Society of Agricultural Engineering, 2020, 36(14):69-79. [10]Wei Shiquan, Li Yue, Wu Zihan, et al. Optimization Design of Key Components of Horizontal Banana Straw Crushing and Returning Machine. Journal of Agricultural Mechanization Research, 2024, 46(12):58-66. [11]Zheng Zhiqi, He Jin, Li Hongwen, et al. Design and Experiment of Straw-chopping Device with Chopping and Fixed Knife Supported Slide Cutting. Transactions of the Chinese Society for Agricultural Machinery, 2016, 47(S1): 108-116. [12]Ding Shuangshuang, Wang Jikui, Li Tianwen, et al. Dynamic Anslysis of Cotton-stalk Straw Crushing Device. Journal of Chinese Agricultural Mechanization, 2016, 37(2):119-122. [13]Zhang Tao, Zhao Manquan, Liu Fei, et al. A Discrete Element Method Model of Corn Stalk and its Mechanical Characteristic Parameters. Bioresources, 2020, 15(4): 9337-9350. [14]Wu Zihan, Li Yue, Guo Chaofan, et al. Design and Simulation Analysis of Self-propelled Banana Straw Crushing and Returning Machine. Journal of Chinese Agricultural Mechanization, 2022, 43(9): 40-46. [15]Guo Qian, Zhang Xiliang, Xu Yunfeng, et al. Design and Experiment of Cutting Blade for Cane Straw. Transactions of the Chinese Society of Agricultural Engineering, 2014, 30(24): 47-53.