Investigation of Controlled Parameters of the Seeding Apparatus of an Electrified Seeder

Abstract

An important aspect influencing the provision of a given seeding rate is the interaction of seeds with the mechanism of the double ejector under various operating modes of the sowing unit. The study of the interaction of seeds with structural elements of the sowing machine, taking into account their physical and mechanical properties, will allow us to evaluate the efficiency of seed placement at various speeds of the sowing unit and develop automatic control systems for the mechanism of the twin ejector. The purpose of the study is to determine the statistical characteristics of the distribution of seeds depending on the position of the twin ejector and the rotational speed of the sowing disc and to determine the optimal values of these parameters. The design and operating parameters of the sowing machine were determined using the methodology of planning a multifactorial experiment. A second-order planning matrix based on two-factor Box-Wilson plans was used. Lisbon soybeans were used for research. The speed of the meter disk was varied from 15 rpm (low level) to 55 rpm (high level). The position of the seed ejector was set so that the suction hole was blocked halfway (lower level) to a fully open hole (upper level). The coefficient of variation of the time intervals between the ejection of seeds from the sowing apparatus and the crushing of seeds were chosen as optimization criteria. The regression equations that adequately describe the seeding process under study were obtained from the results of the experiments. Installed. that the control factors should be within the following limits: the rotational speed of the seeding disc should be from 15 to 35 rpm, and the position of the excess seed remover should provide overlapping of the holes by 10 - 35%, while the coefficient of variation will be less than 33%, and the crushing of seeds less than 1 %. The data obtained can be used to develop a control algorithm for the automatic regulator of the position of the twin ejector, depending on the speed of the sowing unit.