LABORATORY TESTS OF A FOUR-SECTION SEED WHEEL WITH GROOVES IN THE SHAPE OF A PART OF THE ROTATION SURFACE OF A TORUS
The article deals with the issue of improving the quality indicator of sowing cereal seeds, such as instability of total sowing and the results of laboratory research of experimental sowing machine, the reel of which is made four-sectional, with grooves in the form of a part of the torus surface rotation. Laboratory researches of experimental sowing machine to find rational values of its design and operating parameters necessary for quality work were carried out using a laboratory set-up. The graphical dependences of instability of total seeding on frequency of rotation of the four-sectional coil, the radius of the forming part of the torus rotation surface and the groove length of one section of the four-sectional wheel were obtained. The paper presents two-dimensional cross-sections of the graphic dependence that characterize the instability of total seeding on its design and operating parameters of the experimental seeding unit, the wheel of which is made four-sectional, with grooves in the form of a part of the torus rotation surface, the rotation frequency of the four-sectional wheel, the radius of the forming part of the torus rotation surface and the groove length of one section of the four-sectional wheel, which provide the lowest instability of the total seeding [1, 2].