农业工程学报2011，Vol.27Issue(12)：18-22,5.DOI:10.3969/j.issn.1002-6819.2011.12.004
气吹式精密排种器工作压力试验研究
Experimental study on pressure of air-blowing precision seed-metering device
摘要
Abstract
Laboratory and field experiments were carried out to determine the appropriate range of work pressure of the air-blowing precision seed-metering device. And the influence of pressure on the qualified index, multiple index and miss index was investigated by single-element analysis of variance. Two devices made of different material were tested in the experiment. The pressure varied from 0.7 to 8 kPa, and field experiment for the same condition repeated. It was observed that the seed-metering device has satisfactory and steady performance with the pressure over 2.5 kPa in laboratory experiment. And the sowing quality gradually turns better with the increase of the pressure. When the pressure gets to 8 kPa, the qualified index is 97.28%. The analysis of variance shows that there is appreciable impact of variation of the pressure on the planting quality. The average qualified index surpasses 90% within the range of 2.5-4.5 kPa. In the field test, the qualified index is 93.18%. The air-blowing precision seed-metering device has superior flexibility on the variation of pressure, low miss index and stable field operation.关键词
农业机械/设计/试验/气吹式精密排种器/压力Key words
agricultural machinery/ design/experiments/ air-blowing precision seed-metering device/ pressure分类
农业科技引用本文复制引用
刘佳,崔涛,张东兴,黄邵路,史嵩..气吹式精密排种器工作压力试验研究[J].农业工程学报,2011,27(12):18-22,5.基金项目
玉米机械化生产工艺与装备系统优化研究与示范项目(200903059):国家现代玉米产业技术体系建设项目(nycytx-02):农业部土壤-机器-植物系统技术重点实验室资助项目 （200903059）
