Optimization Design and Experiment of Vertical Rotary Harrow for Mulberry Plantation

YANG Qinglu, LÜ Zhengwen, YAN Yinfa, YANG Shuo, LI Fade, SONG Zhanhua, CHEN Yujun

Abstract

The cultivation and land preparation work in mulberry plantations is the important foundation for improving mulberry leaf yield. Based on the mulberry planting mode and the requirements of cultivation and land preparation work, a vertical rotating rotary harrow suitable for mulberry plantations was designed and optimized. According to the mulberry plantation planting and cultivation requirements to determine the rotary harrow machine structure, through the theoretical analysis of the harrow knife operation process and kinematic analysis, the harrow knife structure parameters were determined. Using the discrete element method to simulate the rotary harrow operation process, and the influence of different camber angles on the torque of the harrow knife and working quality of the machine and the variation law of the torque during the harrow operation were analyzed. Taking rotor speed, forward speed and plowing depth as test factors, and taking soil breakage rate, surface flatness after harrowing and soil weight as test indexes, a three-factor, three-level orthogonal rotary combination field test was carried out to analyze the influence of each factor on the operational effect of rotary harrow. The test results showed that the rotor speed and forward speed on the soil breakage rate, harrowing surface flatness and soil weight was very significant;the effect of plowing depth was only significant on the soil breakage rate, and there was no significant effect on the harrowing surface flatness and soil weight. The optimal combination of operating parameters was calculated as follows: rotor speed was 350 r/min, forward speed was 0.7 m/s, plowing depth was 20 cm, soil fragmentation rate was 97.89%, surface flatness was 11.04 mm after harrowing, and soil capacity was 1.11 g/cm3. The verification test was carried out with the optimized operation parameter combination, and the soil breakage rate was 97.29%, surface flatness after harrowing was 11.53 mm, soil capacity was 1.07 g/cm3, which was consistent with the optimized results, and it met the operational requirements.

 

Keywords: mulberry plantation tillage and soil preparation, rotary harrow, discrete element simulation, optimization design

 

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WANG Yongbin, SONG Zhanhua, GAO Tianhao, et al. Application status quo and development idea of mulberry management machine in China[J]. China Sericulture, 2016, 37(4) : 55 -59, 64.

DU Jun, HENG Yifan, ZHENG Kan, et al. Investigation of the burial and mixing performance of a rotary tiller using discrete element method [J]. Soil & 'Tillage Research, 2022, 220: 105349.

ZHANG Yifu, LIU Jian, YUAN Wei, et al. Multiple leveling for paddy field preparation with double axis rotary tillage accelerates rice growth and economic benefits. Agriculture, 2021, 11 (12) ; 1223.

HE Dong, LU Caiyun, TONG Zhenwei, et al. Research progress of minimal tillage method and machine in China [J]. AgriEngineering, 2021, 3(3); 633 -647.

BALSARI P, BIGLLA A, COMBA L, et al. Performance analysis of a tractor-power harrow system under different working conditions [J]. Biosystems Engineering, 2020, 202: 28 -41.

WANG Yingbo, KONG Gao, LI Hongwen, et al. Design and parameter optimization of vertical driving-type surface rotary tillage machine[J]. Transactions of the CSAE, 2019, 35(9) ; 38 -47. (in Chinese)

ZHAI Shike, SHI Yixin, ZHOU Junchi, et al. Simulation optimization and experimental study of the working performance of a vertical rotary tiller based on the discrete element method [J]. Actuators, 2022, 11(12) ; 342.

CHEN Wei, DING Yan, TASHI N, et al. Design and experiment of a vertical rotary tillage machine with fixed-layer fertilization function[J]. INMATEH Agricultural Engineering, 2022, 67(2) ; 33 -40.

ZHAI Lichao, XU Ping, ZHANG Zhengbin, et al. Effects of deep vertical rotary tillage on dry matter accumulation and grain yield of summer maize in the Huang - Huai - Hai Plain of China science direct[J]. Soil and Tillage Research, 2017, 170: 167 - 174.

MATIN M A, HOSSAIN M I, GATHALA M K, et al. Optimal design and setting of rotary strip-tiller blades to intensify dry season cropping in Asian wet clay soil conditions[J]. Soil and Tillage Research, 2021, 207 : 104854.

VARANI M, МАТТЕТ M, MOLARI G, et al. Correlation between power harrow energy demand and tilled soil aggregate dimensions [J]. Biosystems Engineering, 2023, 225: 54 -68.

UCGUL M, SAUNDERS C, LI Peilin, et al. Analyzing the mixing performance of a rotary spader using digital image processing and discrete element modelling (DEM) [J]. Computers & Electronics in Agriculture, 2018, 151 ; 1-10.

SUN Jiyu, WANG Yueming, MA Yunhai, et al. DEM simulation of bionic subsoilers (tillage depth > 40 cm) with drag reduction and lower soil disturbance characteristics[J]. Advances in Engineering Software, 2018, 119(5) ; 30 -37.

BARR J B, UCGUL M, DESBIOLLES J M A, et al. Simulating the effect of rake angle on narrow opener performance with the discrete element method[J]. Biosystems Engineering, 2018, 171 : 1 - 15.

FANG Huimin, JI Changying, ZHANG Qingyi, et al. Force analysis of rotary blade based on distinct element method [J]. Transactions of the CSAE, 2016, 32(21): 54 -59.

DING Qishuo, HEN Jim, BELAL E A, et al. DEM analysis of subsoiling process in wet clayey paddy soil[J]. Transactions of the Chinese Society for Agricultural Machinery, 2017, 48(3) ; 38 -48. (in Chinese)

LIU Mochen, ZHAO Qingji, HAN Shouqiang, et al. Development and test of self-walking mulberry garden integrated machine with variable proportion and directional disperse fertilization [J]. Transactions of the Chinese Society for Agricultural Machinery, 2022, 53(Supp.2); 120-130, 140.

ZHU Huibin, WU Xian, BA1 Lizhen, et al. Development of the biaxial stubble breaking no-tillage device for rice stubble field based on EDEM - ADAMS simulation [ J]. Transactions of the CSAE, 2022, 38 (19) ; 10 -22. (in Chinese)

QIN Kuan, DING Weimin, FANG Zhichao, et al. Design and experiment of plowing and rotary tillage combined machine [J]. Transactions of the CSAE, 2016, 32( 16) ; 7 - 16.

WANG Xianliang, HU Hong, WANG Qingjie, et al. Calibration method of soil contact characteristic parameters based on DEM theory [J]. Transactions of the Chinese Society for Agricultural Machinery, 2017 , 48 ( 12) ; 78 - 85. (in Chinese)

XIANG Wei, WU Mingliang, LC Jiangnan, et al. Calibration of simulation physical parameters of clay loam based on soil accumulation test[J]. Transactions of the CSAE, 2019, 35(12): 116 - 123.


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