| Design and experiment of bionic shifting and diffluence straw anti\|blocking device |
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| DOI：10.7606/j.issn.1000-7601.2023.04.33 |
| Key Words: minimum and no\|till planter shifting and diffluence straw anti\|blocking device biomimetic Potosia brevitarsis image processing DEM simulation |
| Author Name | Affiliation | | ZHU Huibin | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | ZHANG Xu | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | HONG Yang | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | BAI Lizhen | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | ZHAO Haoran | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | MA Shiao | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China |
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| Abstract: |
| In the wheat straw covered land in Southwest China, the passive straw cleaning and anti\|blocking device on the corn no tillage planter is prone to some problems during operation, such as winding and blocking, low straw cleaning rate in the seed ditch, and low operational stability. Based on the principle of bionics, the contour curve of the front and rear limbs and the movement trajectory curve of the rear limbs of the Potosia brevitarsis were taken as the bionic prototype. A bionic shifting and diffluence straw anti\|blocking device was designed. Through kinematics analysis, the influence law of key structural parameters on straw cleaning and anti\|blocking effect was studied. It was determined that the movement deflection angle of the grass wheel was 30°, the wheel disc diameter was 204 mm, and the number of grass wheel claws was 13. Using Design\|Expert software and Box\|Behnken experiment optimization design method, the regression mathematical model of the depth of grass wheel (A), the forward speed of the machine (B), the deflection angle of the dividing baffle (C) and the straw cleaning rate (Y) were established. The analysis showed that each factor had a significant influence on the straw cleaning rate, and the significance was C>B>A. The optimization results showed that with the depth of the straw wheel of 11 mm, the forward speed of 4 km·h-1, and the grass dividing baffle deflection angle of 35°, the straw cleaning and anti\|blocking device had the best working performance. The field verification experiment showed that the machine had good trafficability, the actual straw cleaning rate and its coefficient of variation were 90.58% and 1.20%, the average soil disturbance and its coefficient of variation were 20.00% and 5.30%. The operation quality was stable, which met the agronomic and technical requirements of no\|till planter operation. |
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