| Comparison and analysis of the operating performance of different drive\|type disc cutters based on EDEM simulation |
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| DOI：10.7606/j.issn.1000-7601.2025.03.30 |
| Key Words: disc knife driven EDEM simulation anti\|blocking device straw cutting rate |
| Author Name | Affiliation | | ZHU Huibin | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | QIN Jin | 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 | | QIAN Cheng | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | WANG Mingpeng | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | LI Rongdong | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China |
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| Abstract: |
| To investigate the differences in the operational performance of various driven disc knives during no\|tillage operations under conditions of heavy straw mulching and full straw coverage in Southwest China, this study focused on bionic disc knives, notched disc knives, and corrugated disc knives, analyzing their force states during straw cutting. Single\|factor EDEM discrete element simulations and three\|factor, three\|level orthogonal field comparison tests were conducted on a self\|developed anti\|clogging device, with the following experimental factors: types of forward\|rotating disc knives, types of forward\|and\|reverse\|rotating disc knives, forward speed of the machine, and rotational speed of the disc knives. Evaluation indicators included the number of broken bonding keys (indicating straw cutting rate), soil disturbance, and machine passage ability. Simulation test results indicated that, under identical conditions, the number of broken bonding keys and machine passage ability were superior in the order of forward\|rotating bionic disc knives > forward\|rotating notched disc knives > forward\|rotating corrugated disc knives, and similarly for forward\|and\|reverse\|rotating disc knives. Soil disturbance showed an opposite trend. Field test results showed that when the straw coverage was 1.432 kg·m-2, the type of disc knife had the most significant impact on the straw cutting rate. Operational effectiveness aligned with simulation test results across various rotational and forward speeds of the machine. Under conditions of heavy straw mulching and full straw coverage, bionic disc knives outperformed traditional disc knives in all aspects except soil disturbance. Only the forward\|and\|reverse\|rotating bionic disc knife met operational requirements and demonstrated superior performance. This study provides a theoretical foundation for the rational design and applicability analysis of stubble\|cutting and trenching components in no\|tillage seeders under heavy straw mulching and full straw coverage conditions. |
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