Structural Design and Parameters Optimization of Rice Seed-Metering Device

Abstract:

In order to improve the seeding quality of paddy planter, some parts of rice seed-metering, such as sufficient regulator and delivery tube, were optimally designed, and field experiment was completed to optimize the structural and working parameters. Central composite design was employed to as design the experimental plan by means of the Design-Expert software (Version 7.0). The parameters of travel speed (A), sufficient regulator’s angle (B) and length of delivery tube (C) were selected as influence factors, and seeding quality rate(y₁), damage ratio of seeding(y₂) and ratio of seeding holes(y₃) were chosen as objective indexes. Regression models were established and analyzed based on Design-Expert and SAS software. The experiment results indicated that sufficient regulator improved quality of seeding and ratio of seeding holes especially with a few rice seeds in seed room. Under experimental conditions, the importance of each variable on y₁, y₂ and y₃ was A>C>B, C>B>A and C>B>A and effects of the interaction of A and C on y₁, the interaction of B and C on y₂ and the interaction of A and C on y₃ were significant by response surface analysis. By multiple objective programming, the optimal parameters were obtained as follow: travel speed of 2.8km/h, angle of sufficient regulator of 72°and delivery tube’s length of 0.25m. This study has important significant to well improvement seeding quality of rice direct-seeding.

• Periodical: Applied Mechanics and Materials (Volumes 397-400)
• Pages: 957-965
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.397-400.957
• Online since: September 2013
• Authors: Jing Ma, Xiao Long Lei, Rong Chao Ma
• Keywords: Central Composite Design Index, Parameter Optimization, Rice Direct-Seeding, Seed Metering

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