加压条件下气力轮式精密排种器性能分析  

Analysis on Performance of an Air-blowing Vertical-rotor Type Precision Seed-metering Device

作　　者：孙裕晶[1] 马成林[1] 李萌[2] 

机构地区：[1]吉林大学工程仿生教育部重点实验室,长春130025 [2]吉林大学生物与农业工程学院,长春130025

出　　处：《农业机械学报》2009年第7期72-77,60,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十一五"国家科技支撑计划资助项目(2006BAD11A08-4;2006BAD11A054-1-1);吉林省科技发展计划资助项目(20060823-14)

摘　　要：针对研制的气力轮式精密排种器,采用均匀设计法设计试验,运用均匀设计软件UST 1.0建立了大豆排种性能指标数学模型,分析气力条件下排种器设计参数对排种性能的影响规律。分析表明：气力条件下,排种性能指标主要受气压和作业速度影响,气压范围为1.4~1.8 kPa时粒距合格率达到85%以上,满足8 km/h速度以上大豆精密播种;充种角和清种角变化对排种性能影响不显著,充种角和清种角优化区域与常压条件下排种试验优化结果一致：充种角为46.35°、清种角为55°;气流方向对排种性能没有显著影响。Uniform design was used to test the soybean seeding performance of an air-blowing vertical-rotor type precision seed-metering device in laboratory. Based on test results, regression models of seeding performance were constructed by uniform design software UST 1.0. The effects of designing and operating parameters of air-blowing vertical rotor seeder on its performance were investigated. The results suggest that seeding performance is sensitive to air pressure and operating speed in air-blowing condition. The qualified seeding rate is over 85 % in 1.4- 1.8 kPa air pressure and can satisfy the needs to seed soybean at over 8 km/h operating speed. Seeding performance of the air-blowing verticalrotor type precision seed-metering device is insensitive to seed-filling angle and seed-cleaning angle. The optimized results for seed-filling angle and seed-cleaning angle are consistent with the results at atmospheric pressure, which are 46.35° and 55° for seed-filling angle and seed-cleaning angle respectively. There is no remarkable influence of the air-blowing direction on seeding performance.

关 键 词：排种器 性能 加压条件 均匀设计 数学模型 

分 类 号：S223.25[农业科学—农业机械化工程]