THE USE OF AERODYNAMIC PROPERTIES OF SEEDS TO OPERATE A UNIVERSAL SYSTEM OF SEEDING PNEUMATIC UNIT VACUUM ACTION

Abstract

The device of the pneumatic sowing device of vacuum action which differs in simplicity of a design, the lowered material consumption, low level of mechanical damage of a sowing material (minimum values of percent of crushing of seeds), possibility of simultaneous sowing of seeds of two different cultures in one row (it is important for fodder crops) is developed. Structurally, the following basic changes have been made in the pneumatic sowing device:1. The scattering part of the pipe (with experimentally selected parameters, length 100 ... 120 mm and a sieving angle 80 ... 90°) allows the main zone to intercept the flow of seeds from the hopper, without passing them to the lower part of the sowing disc – in the accumulation zone; 2. The air flow from the nozzle supports the seeds (through the use of their useful aerodynamic qualities) in a suspended state near the holes of the sowing disc, which contributes to the reliable suction of the seeds to the holes of the disc. At the same time, the nozzles prevent the penetration of seeds into the accumulation zone, which allows to improve the quality of the sowing apparatus. The exclusion of the tedder from the structural part of the sowing device reduces the percentage of mechanical damage to the seeds (which affects the yield), as well as the material capacity of the structure itself.