Design and Test of Precise Regulation System for Process Parameters of Double-Layer Tea Winnowing Machine

Zhengmin Wu, Yangyang Huang, Tengyu Ouyang, Kun Luo, Kuan Qin, Yan Sun and Chengmao Cao ()
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Zhengmin Wu: School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
Yangyang Huang: School of Engineering, Anhui Agricultural University, Hefei 230036, China
Tengyu Ouyang: School of Engineering, Anhui Agricultural University, Hefei 230036, China
Kun Luo: School of Engineering, Anhui Agricultural University, Hefei 230036, China
Kuan Qin: School of Engineering, Anhui Agricultural University, Hefei 230036, China
Yan Sun: School of Engineering, Anhui Agricultural University, Hefei 230036, China
Chengmao Cao: School of Engineering, Anhui Agricultural University, Hefei 230036, China

Agriculture, 2022, vol. 12, issue 10, 1-18

Abstract: Conventional winnowing machines rely on manual operation and adjust their parameter settings based on experience. These problems have led to poor wind sorting results. In order to improve the sorting accuracy and efficiency of the tea winnowing machine, a double-layer automatically controlled winnowing machine has been designed in this study. Firstly, an automatic control system based on a programmable logic controller is established. Secondly, the AC motor control technology is used to achieve the automatic adjustment of the baffle position. The prototype tests show that the control input voltage of the vibrating feeder is 2 V for Lan tea and 1.5 V for pan-fried green tea material. The frequencies of the upper fan are 30 Hz and 25 Hz, respectively, while those of the lower fan are 35 Hz and 30 Hz, respectively. For Lan tea, the No. 3 baffle moves to the right by 5 cm, and the positions of the No. 5 and No. 6 baffles remain unchanged. The main outlet of the double-layer winnowing machine contains 3.72% impurities. As for pan-fried green tea, the position of the No. 3 baffle remains unchanged, the No. 5 baffle moves 5 cm to the right, and the No. 6 baffle moves 4.5 cm to the right. The main outlet of the winnowing machine contains 4.28% impurities. The experiments indicate that the double-layer winnowing machine is more effective than the single-layer one and can provide a reference for an efficient and accurate winnowing machine.

Keywords: double-layer winnowing machine of tea; structural design; control system; response surface method; optimal parameters (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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