2BDG-2型谷子精少量电动播种机设计与试验

为解决丘陵山区分散小块地谷子播种量大、间苗工作量大等问题，按照谷子精少量播种要求，设计试制了2BDG-2型谷子精少量电动播种机，该播种机主要由电力驱动系统、动力传动系统以及倾斜圆盘式精少量排种装置等零部件组成，能够一次完成开沟、精少量排种、覆土和镇压等播种作业。依据谷物播种的国标，进行了排种装置的排种性能和播种机播种均匀性的试验。排种性能试验结果表明:不同地轮转速和理论穴距下的各行排量一致性和总排量稳定性的变异系数均≤1.27%、种子破损率≤0.08%。播种均匀性试验结果表明:不同作业速度和理论穴距下的穴距合格率均≥86.81%，重播率、漏播率和合格穴距变异系数分别≤7.40%、7.28%和6.97%，各项参数均达到谷物播种的国标要求。该研究可用于丘陵山区分散小块地谷子精少量播种。 

Design and Test of 2BDG-2 Millet Seed Essence Small Amount Electric Seeder

In order to solve problems of large amount of seeding and large workload of seedling thinning in scattered small plots of Hilly and mountainous areas，the 2BDG-2 electric seeder with small amount of millet sperm was designed and manufactured according to requirement of small amount of millet sperm seeding.The seeder was mainly composed of electric drive system，power transmission system，inclined disc precise small amount of seeding device and other parts，which could complete ditching，precise small amount of seeding and covering at one time.Soil and repression and other sowing operations.According to national standard of grain sowing，the performance of seed metering device and uniformity of seeding machine were tested.Results of seed metering performance test showed that coefficient of variation of consistency of row displacement and stability of total displacement were not greater than 1.27% and rate of seed damage was less than 0.08% under different rotational speeds and theoretical hole spacing.Results of sowing uniformity test showed that qualified rate of hole spacing was not less than 86.81% under different operating speed and theoretical hole spacing，and variation coefficients of replaying rate，missing sowing rate and qualified hole spacing were not more than 7.40%，7.28% and 6.97% respectively.All parameters met requirements of national standards for grain sowing.This study can be used for small amount of millet sperm sowing in scattered plots in Hilly and mountainous areas.