1.Wuxi Lixin Branch of Jiangsu Union Technical Institute, Wuxi, Jiansu 214000, China; 2.School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3.Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 4.College of Forest Resource and Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; 5.Logistics Service Group, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：In order to study the effect of blade structure parameters on the cutting efficiency and cutting performance of straw in the shredder, the discrete element method and EDEM software were used to set up the simulation model for cutting the tomato cane straw in the cutting machine. The numerical simulation of cutting energy consumption, cutting force and cutting effect was carried out, and the results were comparied with the test results. The results show that compared with the equal slip angle flat blade and the ordinary blade, the equal slip angle sawtooth blade has less force in the cutting process, the force is more uniform, the fluctuation is smaller, the cutting energy consumption is the lowest, the cutting efficiency is the highest, the cutting time is the shortest, the cutting effect is better and the advantage is obvious. When cutting the tomato cane straw, the cutting force, the energy consumed, the consumed cutting energy, and the cutting time of the 40 equal slip angle sawtooth blade are lower than those of 45° same blade, and its cutting efficiency is higher and cutting effect is better. The results provide a theoretical basis for the selection of tomato straw cutting blades and their structural parameters.
[1]XU Yunfeng,ZHANG Xiliang,SUN Xiaojia,et al. Research on tensile mechanical properties of greenhouse cucumber cane[J]. Int J Agric & Biol Eng,2016,9(5):1-8.[2]郑健,王燕,蔡焕杰,等. 秸秆颗粒形态对沟灌入渗特征影响的试验研究[J]. 排灌机械工程学报,2016,34(1): 66-72. ZHENG Jian,WANG Yan, CAI Huanjie,et al. Experimental investigation into effects of maize leaf and straw fragments on soil water infiltration characteristics in furrow irrigation[J]. Journal of drainage and irrigation machinery engineering, 2016, 34(1): 66-72.(in Chinese)[3]郭茜,张西良,徐云峰,等.茄子藤秸秆微观结构及剪切力学特性[J].江苏农业科学,2018,46(6):189-192. GUO Qian, ZHANG Xiliang, XU Yunfent, et al. Study on microstructure and mechanical properties of eggplant stalk[J].Jiangsu agricultural sciences, 2018,46(6):189-192.(in Chinese)[4]王丽娟,石林榕,杨国军,等. 玉米秸秆切割过程的非线性数值模拟与仿真试验[J]. 干旱地区农业研究, 2013,31(6):252-256. WANG Lijuan, SHI Linrong, YANG Guojun, et al. Nonlinear numerical simulation and simulation test on the cutting process of corn stalk[J]. Agricultural research in the arid areas, 2013, 31(6): 252-256.(in Chinese)[5]范怀斌,郑泉,陈黎卿,等. 基于联合仿真技术的秸秆粉碎装置设计与研究[J]. 农机化研究, 2014,35(4):100-103. FAN Huaibin,ZHENG Quan,CHEN Liqing,et al. The research of motor test system based on networked virtual instruments[J]. Journal of agricultural mechanization research, 2014,35(4):100-103.(in Chinese)[6]张世福,宋占华,闫银发,等. 农作物秸秆切割试验台测控系统的研制与试验[J]. 农业工程学报. 2013,29(S1):10-17. ZHANG Shifu,SONG Zhanhua,YAN Yinfa,et al. Development and expriment of measure and control system for stalk cutting test bench[J]. Transactions of the CSAE, 2013,29(S1):10-17.(in Chinese)[7]黄汉东,王玉兴,唐艳芹,等. 甘蔗切割过程的有限元仿真[J]. 农业工程学报. 2011,27(2):161-166. HUANG Handong,WANG Yuxing,TANG Yanqin,et al. Finite element simulation of sugarcane cutting[J]. Transactions of the CSAE, 2011,27(2):161-166.(in Chinese)[8]O’DOGHERTY M J, HUBER J A, DYSON J, et al. A study of the physical and mechanical properties of wheat straw[J]. Journal of agricultural engineering research, 1995, 62(2): 133-142.[9]BERTHET M A, GONTARD N, ANGELLIER-Coussy H. Impact of fiber moisture content on the structure/mechanical properties relationships of PHBV/wheat straw fibers biocomposites[J]. Composites science and technology, 2015, 117:386-391.[10]SITZ E D, BAJWA D S. The mechanical properties of soybean straw and wheat straw blended medium density fiberboards made with methylene diphenyl diisocyanate binder[J]. Industrial crops and products, 2015, 75:200-205.[11]BELHADJ B,BEDERINA M, MONTRELAY N,et al. Effect of substitution of wood shavings by barley straws on the physico-mechanical properties of lightweight sand concrete[J]. Construction and building materials, 2014, 66:247-258.[12]BABAEI I,MADANIPOUR M, FARSI M,et al. Physical and mechanical properties of foamed HDPE/wheat straw flour/nanoclay hybrid composite[J]. Composites:Part B,2014,56:163-170.
