Design and study of seeding devices for small selection seeding machines

Abstract

In this paper, it is proposed to use a self-propelled pneumatic mini-seeder with replaceable mechanical sowing devices designed and manufactured using computer technologies, advanced software and threedimensional printing for seeds selection. As a result of the research, hightech operating devices for a grain-drill feed with screw and disk-pin continuous seed metering are designed and manufactured. Grain-drill feeds allow sowing of free-flowing and non-free-flowing seeds, when used as seed meters on self-propelled pneumatic mini-seeders for selection sowing of grass seeds. Analysis of laboratory results of and field studies of the proposed grain-drill feeds allowed to determine the qualitative indicators of their performance: at a disk rotation speed of up to 15 rpm a linear dependence of the seed supply on the rotation frequency is provided; in the field studies, the instability of bluegrass seeding did not exceed 8%. The highest performance of the screw is obtained at the angle of choke inclination of 30...35 degrees with the seeding instability indicator of 2.5...3.5%. The developed grain-drill feed will significantly reduce the range of seeders and expand the set of sown seeds of various agricultural plants with one brand of a grain-drill feed.

Modernization of a Chemical Nickeling Unit for Metal Products

“…As a result, the unit for the chemical nickel plating process has been modernized up to the following characteristics: Volume of the plating solution, dm 3 , not more than 270±5 Internal dimensions of the bath, mm, not more than 900х500х650 Overall dimensions of the installation, mm, not more than 1280х1270х1330 Weight of the unit (without solution), kg, not more than 385 Power consumption, kW, not more than 21 The amplitude of the shaking mechanism, mm, not more than 25±2 Frequency of the shaking mechanism, Hz, not more than 0,5±0,1 Voltage of the anode protection power supply, V, not more than 6 Heating time of the solution, min, not more than 120 Working temperature of the solution in the working area,°C, not more than 90±2 Surface of simultaneously loaded parts, m 2 , max. Bottom cooling surface, m 2 0,45 Amount of filtrate, m 3 / h 0,6-1,2 Degree of purification, microns 10 The design documentation is developed using the SolidWorks software package.…”

“…An increase in the hardness of the rubbing surfaces due to application of electroplating coatings allows to increase the operational life of the rubbing surfaces, for example, the cylinders of internal combustion engines [2], [3] Chrome coating proved to be one of the hardest. However, due to its high price, nickel coating with similar hardness is often used instead.…”

The Effect of the Distribution Head Tilt and Diffuser Variants on the Evenness of Sowing Rye and Oat Seeds with a Pneumatic Seed Drill

“…Then, the seeds went through the suction duct (12) to the separating cyclone located above the main tank (1). The conical bottom of the separating cyclone in the lower part was closed by a flap (13), which was not connected to the cylindrical part of the cyclone. It was based on three strain gauges (14) for weighing seeds from each chamber of the collecting box separately with an accuracy of 0.005 kg.…”

“…As it is difficult to evenly distribute the seed stream in pneumatic seed drills, there is a wide range of publications about the causes of unevenness [ 7 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ] as well as methods and apparatuses used to assess seed sowing evenness [ 16 , 17 ]. There have been publications concerning numerical investigations of the movement of grain mixtures and the airstream escaping from dosing units [ 18 , 19 ], and the distribution of the seed-and-air stream in the distribution head [ 20 , 21 , 22 ].…”

Influence of parameters of a pneumatic grain seeder distributor on the uniform distribution of seeds

“…The advantages of this type of machines, among which there is high productivity, operational and structural manufacturability, were repeatedly expressed in their works by Rakhimov R.S., Astakhov V.S., Kryuchin N.P. [1,2,3] and many others. However, a significant drawback of machines with pneumatic sowing systems is high uneven distribution of seed grain over the coverage.…”