Flow of seeds in 4-bar seeder metering device

Abstract

The aims of a variety of seeds including: maize, wheat, sunflower, peas and cotton. Study included: a computer program to draw the mechanism in different configuration this study are to investigate factors relevant to design of a 4-bar feeding device, to accept. Machine speed; wheel slip; and construction of agitator were also studied. The main results can be summarized in the flowing points: -The appropriate 4-bar proportions are: 1.0, 1.5, 1.6, and 1.73 for crank, swing rod, con. rod, and base respectively. -The average forward walking speed was 3.5-4 km/h. -Hopper was found to need an agitator device, to regulate seeds distribution for big seeds like maize, sunflower and peas. -Metering device could be used in small grains, like wheat without agitator (with only 1.19 % missing spaces). -The relationship between furrow depth and wheel slip was as follows: S = 0.1802x +1.3359, where “S” slip %, “x” depth cm. -In cotton seeds “Giza 86”, it was found that the best feeding rate for coated cotton seeds (6 seeds/hill) is at gate height 2 cm, with 6.72% ratio of missing hills, comparing to uncoated seeds (up to 58.5%).