华南农业大学学报2024，Vol.45Issue(1)：116-126,11.DOI:10.7671/j.issn.1001-411X.202208041
蔬菜穴盘育苗播种机清种装置的设计与试验
Design and experiment of seed cleaning device of vegetable plug seedling seeder
摘要
Abstract
[Objective]Aiming at the problem that the existing seed cleaning device of the vegetable plug seedling seeder is not effective in cleaning seeds,resulting in low seed filling qualification rate and high reseeding rate,a seed cleaning device integrating mechanical type,air blowing and electric control is designed.[Method]Combined with kinematics and dynamics theory,the structure of the three-stage seed cleaning device was designed.The air flow stability in different air-inlet and air-outlet structures of the air-blown seed cleaning device was analyzed by using the fluent module in Ansys software.On the basis of theoretical analysis and simulation analysis,the speed of seeding device,negative pressure of seeding device,positive pressure of seed cleaning device and seed diameter were selected as the experimental factors.According to the agronomy requirements,qualified rate of single seed filling and reseeding rate were selected as test indexes to carry out four-factor and three-level quadratic regression orthogonal test.The best parameter combination was obtained based on the experimental data.[Result]According to the simulation analysis,it is concluded that the air blowing type structure with the air-inlet circular arc nozzle at the middle end had the best seed cleaning effect.The best parameter combination for seed metering was summarized from the bench test.When the speed of the seeding device was 0.17 r/s,and the seed diameter was 1.5 mm,the negative pressure of the seeding device was 0.6 kPa,and the positive pressure of the air blowing seed cleaning device was 0.3 kPa,the average qualified rate of single seed filling was 95.31％,and the average reseeding rate was 0.2％.[Conclusion]The design of the seed cleaning device meets the agronomic requirements of vegetable sowing,which can effectively improve the qualified rate of seed filling and reduce the reseeding rate,and provide theoretical guidance for production practice.关键词
蔬菜/穴盘育苗/播种机/清种装置/二次回归正交试验Key words
Vegetable/Plug seedling/Seeder/Seed cleaning device/Quadratic regression orthogonal test分类
农业科技引用本文复制引用
杨文彩,田梓园,潘吴建,赵静,张海东,李贵荣..蔬菜穴盘育苗播种机清种装置的设计与试验[J].华南农业大学学报,2024,45(1):116-126,11.基金项目
云南省重大科技专项计划(2018ZC001-4-3) （2018ZC001-4-3）
