| Design and performance optimization of straw kneading equipment based on dynamic regulation |
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| DOI：10.7606/j.issn.1000-7601.2026.01.28 |
| Key Words: corn straw silk kneading machine three\|roller feeding mechanism parameter optimization response surface analysis |
| Author Name | Affiliation | | XIE Qiang | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Fengwei | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SONG Xuefeng | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CAO Xiaoqing | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Dongyu | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SHI Rongxu | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| This study aimed at solving the problems of large fluctuations of kneading quality, easy clogging, and insufficient adaptability to straw with different moisture contents in small\|scale straw kneading machines. Taking corn straw as the study object, based on the modular design concept, a straw kneading machine integrating an adjustable discharge length system, a three\|roller collaborative feeding mechanism, a cutting mechanism, and a detachable kneading mechanism was developed. Through design and parameters optimization, the structural parameters of key components and the overall structure layout were determined. Through single\|factor experiments (conveyor sprocket speed, rotor speed, straw feeding amount, and straw moisture content), the performance of the kneading machine was evaluated using productivity and silk rate as evaluation indicators, and the value range of each factor was determined. Further, the corn straw with a moisture content of 60% was used as the test sample, and a quadratic orthogonal rotational combination test was carried out with the conveyor sprocket speed, rotor speed, and straw feeding amount as variables. The experimental results were analyzed by response surface analysis, regression analysis and target optimization using Design\|Expert 10.0.1 software. Through multi\|objective optimization, the optimal parameter combination of the mechanism was determined as: conveyor sprocket speed of 575 r·min-1, rotor speed of 2 511 r·min-1, and straw feeding amount of 1.38 kg·s-1. The test verification under the optimal parameter combination condition showed that the productivity was 3 348.54 kg·h-1, and the silk rate was stable at 96.08%, and it showed good adaptability to straw with different moisture contents (30% to 70%). The modular and adjustable kneading machine proposed in this study effectively solved the problems of easy clogging and unstable quality in the process of straw processing through the coordinated action of the discharge length adjustment system and the three\|roller feeding mechanism, and significantly improved the adaptability of the equipment to straw with different moisture contents, providing a theoretical basis and technical model for the intelligent control of straw forage equipment. |
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