PNEUMATIC SOWING APPARATUS Russian patent published in 2020 - IPC A01C7/04 

FIELD: machine building.

SUBSTANCE: pneumatic sowing apparatus includes hopper 10, housing 1 with seed chamber, groove 8 and transport channel 7, vertical sowing disk with dosing elements 4, having holes and projections 5 from elastic material, nozzle of excess pressure and shaft for drive to rotational movement of sowing disk. Each ledge 5 is made in the form of curvilinear polyhedron, flat base of which is fixed to surface of sowing disk. Side faces are composed of cylindrical surfaces conjugated with walls of transport channel 7 and made with radii r₁ and r_2. On side of dosing elements 4 of vertical sowing disk ledges 5 are limited by cylindrical surface with radius R₁, which is determined from dependence

,

where k_c and k_p are the coefficients of friction of the surface of the seed transport channel and the surface of the projection, respectively; d_s is seeding conventional diameter of sown crop; R is the radius of the concentric circle of metering elements and the projections, and the curved upper face projections bounded by a cylindrical surface of radius R₂, which is determined from the dependence

wherein b_p is the width of the protrusion.

EFFECT: invention will make it possible to reduce seizure and damage of seeds, to increase quality of their dosing by a seeding device due to improvement of efficiency of discharge and removal of superfluous seeds.

1 cl, 6 dwg