Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6539241 | Computers and Electronics in Agriculture | 2018 | 8 Pages |
Abstract
The influences of throughput and operating parameters on internal airflow and cleaning performance for the air-and-screen cleaning unit were investigated. The throughput experiment showed that, the airflow velocities above the vibrating screen decreased by 1.3-15.5% for every 1.0â¯kgâ¯sâ1 increase of throughput and which below the vibrating screen decreased by 2.7-8.1%. As a result, the cleaning performance has declined. Then, the airflow velocity measurement and cleaning performance tests were taken under 4.0â¯kgâ¯sâ1 throughput with single factor experiment in which fan speed, airflow deflector angle and sieve opening were as factors. And, the Computed Fluid Dynamic (CFD) numerical simulations were carried out to analyze the movement trend of internal airflow as an auxiliary analysis method. The following viewpoints were obtained, the fan speed has a large effect on cleaning performance by affecting the overall airflow velocities in the cleaning unit. And, the airflow velocities above the vibrating screen increased from 0.2â¯mâ¯sâ1 to 0.4â¯mâ¯sâ1 for every 150â¯râ¯minâ1 increase of fan speed, which below the vibrating screen increased from 0.4â¯mâ¯sâ1 to 1.1â¯mâ¯sâ1; The highest airflow velocities area above the vibrating screen moved forward to the central position in the longitudinal direction as the airflow deflector angle increased; With the reduction for each 4â¯mm of chaffer opening, the airflow velocities above the vibrating screen increased by 0.2-0.4â¯mâ¯sâ1. At last, making mathematical relations between each operating parameter and the cleaning performance, and proposing the method of adjusting the single operating parameter under rated condition according to the throughput. They provide a basis for real-time automatic adjustment of the operating parameters in the air-and-screen cleaning unit.
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Related Topics
Physical Sciences and Engineering
Computer Science
Computer Science Applications
Authors
Li Yang, Xu Lizhang, Zhou Ying, Li Baijun, Liang Zhenwei, Li Yaoming,