摘要
为提高蚕豆机械化播种质量,解决蚕豆精量播种难题,结合勺轮式排种器和指夹式排种器的优点,设计了一种勺夹式蚕豆精量排种器。根据蚕豆种子物理特性,分析确定了种盘工作区域范围、弧形滑道结构参数、种夹机构参数以及托种板关键参数。以种夹长度、种夹宽度和弯折角为试验因素进行了3因素3水平正交试验,通过试验确定了种夹较优参数组合为种夹长度15. 5 mm,种夹宽度10 mm,弯折角35°,在较优参数组合下本排种器的株距合格指数为95. 11%、漏播指数为1. 61%、重播指数为3. 28%,满足设计要求,为蚕豆精量排种器的设计提供理论指导。
In order to solve the problem of sowing faba beans and improve its mechanized level,a new type seed metering device was designed and evaluated. To analyze the pros and cons of the existed productions,an overall structure of the new spoon-clamping type seed metering device was built.Combined with physical characteristics of faba beans, the metering plate area, cambered slipway parameters and spoon-clip parameters were researched. For this metering device,there were different working areas and angles on metering plate,among which the seed-filling area was 105°,seed-clearing area was 130°,seed-protecting was 90°,seed-dropping area was 35°. And according to the theory of spoon-clamping type seed metering device,the range of length,width and bending angle of the new spoon can be optimized by measuring three-axis dimension. Bench experiments were conducted for the newly-designed spoon-clipping type seed-metering device. For confirming the optimal parameters of the new spoon-clamping type seed metering device,the orthogonal test was adopted with three levels and three factors. Three test parameters,i. e. length of spoon-clamp,width of spoon-clamp and bending angle were chosen as the influence factors of test experiment. The best working parameters were as below: the length of spoon-clamp was 15. 5 mm,the width of spoon-clamp was 10 mm and the bending angle was 35°. The corresponding performance indexes were as following: the qualified index of seed spacing was 95. 11%,the multiple index was 3. 28%,and the missing-seeding index was 1. 61%,which could completely meet the requirement of the technical specifications of quality evaluation for faba beans metering device in China. The research provided a reference for further improving quality and optimizing the parameter for spoon-clamping type metering device.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2018年第S1期108-116,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家食用豆产业技术体系建设项目(CARS-08)
农业部土壤-机器-植物系统技术重点实验室项目
关键词
精量播种
蚕豆
排种器
勺夹式
precision seeding
faba beans
metering device
spoon-clamping type
