Design and experiment of pneumatic-typed precision centralized metering device for rapeseed

• Published in: Nong ye gong cheng xue bao Vol. 31; no. 7; pp. 9 - 17
• Main Authors: Li, Zhaodong, Lei, Xiaolong, Cao, Xiuying, Liao, Yitao, Liao, Qingxi, Li, Shanshan
• Format: Journal Article
• Language: Chinese
• Published: 01.04.2015
• Subjects: Agricultural engineering; Clearing; Devices; Emergence; Metering; Nucleation; Rape; Rapeseed
• ISSN: 1002-6819
• DOI: 10.3969/j.issn.1002-6819.2015.07.002

The aim of this study is to improve mechanical direct seeding level, a kind of precision centralized metering device for rapeseed with a reliable performance was designed, applying for high speed and broad width. To solve the problem of the wheel type metering device with holes because of the difficulty of precisely controlling the seeding rate on rape seeding, the seeding type holes were punched in a pyramidal shape. This subject introduced the working principle of a pneumatic-typed centralized metering device. It determined the main parameters of the centralized metering device, and established the mechanical model of clearing an area and protecting an area. The field experiment showed that in conditions of clearing pressure 100 Pa, protecting pressure 300 Pa and seeding roller speed 26 r/min, the rape seed field seeding uniformity coefficient variation of the collecting seeding system was 38.76%, and the average emergence distance was 75 mm which satisfied agronomy planting requirements.