| Design and field simulation test of throwing film nail tooth arc picking up device for residual film |
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| DOI：10.7606/j.issn.1000-7601.2021.04.27 |
| Key Words: recovery of residual film film collector pickup device force analysis motion mechanism analysis film throwing device nail tooth |
| Author Name | Affiliation | | WANG Haiyi | Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Traditional Chinese Medicinal Mechanization Engineering Research Center of Yunnan Province Colleges and Universities, Kunming, Yunnan 650500, China | | LI Yanbin | Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Traditional Chinese Medicinal Mechanization Engineering Research Center of Yunnan Province Colleges and Universities, Kunming, Yunnan 650500, China | | WANG Yuanming | Agricultural Machinery Research Institute, Chongqing Academy of Agricultural Sciences, Chongqing 401329, China | | ZHANG Zhaoguo | Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Traditional Chinese Medicinal Mechanization Engineering Research Center of Yunnan Province Colleges and Universities, Kunming, Yunnan 650500, China | | CHEN Hong | Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Traditional Chinese Medicinal Mechanization Engineering Research Center of Yunnan Province Colleges and Universities, Kunming, Yunnan 650500, China | | WANG Lianrui | Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Traditional Chinese Medicinal Mechanization Engineering Research Center of Yunnan Province Colleges and Universities, Kunming, Yunnan 650500, China |
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| Abstract: |
| It is difficult for the existing residual film recovery device to thoroughly dig out the abandoned plastic film in the plough layer, resulting in the continuous deposition of plastic film and serious damage to the soil productivity. Aiming at solving the problems of low recovery rate and high leakage rate of the existing film recovery device, an arc\|shaped film collector was designed to work with the film throwing spring tooth residual film recovery machine. The device was mainly composed of film conveying roller, feeding roller, U\|shaped feeding teeth, film producing finger, arc\|shaped nail tooth, etc. Based on the overall structure, the operational principle and the design characteristics of the main components, the specific structural parameters of the main working parts were determined through theoretical calculations. This paper analyzed the force and motion mechanism of the main components of the arc\|shaped film collector and established the kinematic model. The analysis showed that the arc\|shaped nail tooth trajectory was trochoid curve. According to the comparison between the kinematic model of the overall mechanism and the motion model of the nail tooth point, the conditions for binding and picking of the residual film were obtained. The field simulation experiments of multi\|body dynamics and multi\|physical fields were carried out on the main working parts by COMSOL, and the particle trajectories were tracked. The orthogonal simulation experiments were carried out with the average particle velocity, the average transverse particle velocity, the mass flow rate and the total moment of rotation axis as the dependent variables. The experimental results showed that the optimal parameters were working speed 1.2 m·s-1, embedded depth 35 mm, film picking speed 55 r·min-1. Under the working parameters, the test results were as follows: average particle velocity: 0.9738 m·s-1, average transverse particle velocity: 0.0278 m·s-1, mass flow rate: 0.0091 kg·s-1, total moment of nail tooth: 38.9576 N·m-1, which can improve the residual film producing and collecting effect of the device, and provide a theoretical basis for the manufacture, parameter optimization and development of the physical prototype. |
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