气力轮式精密排种器参数优化

Optimization of parameters of air-blowing vertical-rotor type precision seed-metering device

气力轮式精密排种器是一种常压和气吹状态下大豆、玉米通用精密排种器。该文对排种器进行了改进设计,为考察排种器设计参数对排种性能的影响规律,采用均匀设计法对气力轮式精密排种器常压下大豆排种性能进行试验,运用Matlab 6.1软件对试验建立的排种性能指标回归模型进行图形化处理和参数优化分析。分析表明,排种性能指标对充种角、清种角和作业速度比较敏感,粒距合格率与充填率有相似的变化趋势,二者的优化值区域也相同。优化结果:充种角为46.35o、清种角为55o。

Air-blowing vertical-rotor type precision seed-metering device can be used at the atmosphere air pressure and at air-blowing pressure of 8-35 kPa for seeding corn and soybean. In order to study the influence of design parameters on seeding performances, uniform design was used to implement the seeding performance test of an air-blowing vertical-rotor type precision soybean seed-metering device at the atmospheric air pressure in a laboratory. The regression models of seeding performance test were processed into figures with Matlab 6.1 software. The effects of the device structure parameters on the performance were investigated. The seed-filling angle, the seed-cleaning angle and the operating speed, were sensitive in the experiment, and 6 levels for each factor were selected. The qualified rate of seed spacing and seed filling rate have similar varying trend, and both optimized value thresholds are the same. The optimized results show that seed-filling angle is 46°, and the seed-cleaning angle is 55°.