No abstract

One of the main factors influencing the yield is the depth of seed sowing. Modern technology involves the use of disc seeders. But due to changes in the physical and mechanical properties of the soil, the force acting on the coulter when moving in the field causes the disk to move in the vertical plane, affecting the depth of the sowing. Equilibrium of the opener during operation can be ensured by using a flexible tubular element that is able to create a force compensating for the displacement of the coulter from the force of soil resistance. This mechanism allows the creation of an adaptive disc coulter, which provides the necessary depth in the seeding process. For a mathematical analysis of the equilibrium during working the coulter operation, we propose a model that takes into account the direction of the force action line and its variable value when the seeding depth is changed. The article presents graphical dependencies of the soil resistance force and the angle of inclination of the force action line to the horizon from the depth of the coulter stroke, obtained by the mathematical method. A comparative analysis of the existing and proposed models for calculating the coulter balance is carried out.

To reduce losses in the zero conductor of threephase alternating current networks, it is proposed to use a switching device made on the basis of semiconductor thyristors, in order to enable the single-phase consumer to be connected to the required phase of power supply in order to reduce asymmetry. An algorithm for the operation of this device is developed and presented. Modeling of various schemes of connection of single-phase consumers allowed to make a conclusion about the expediency of the proposed measures.

To ensure the food security of the country, it is necessary to harvest grain seeds annually by agricultural producers. Drying is the most important, energy-intensive and time-consuming post-harvest stage in seed preparation. At present, convective drying with a constant heat supply is the most widespread on the territory of the Russian Federation. To intensify the convective drying process, it is preferable to use the differentiation of heat supply. In order to implement these measures, the possibility of using a heat pump installation of an original design, developed by scientists of the Federal State Budgetary Educational Institution of Higher Education of the State Agrarian University of the Northern Trans-Urals, is presented. Keywords: SEED DRYING, DIFFERENTIATION OF HEAT SUPPLY, CONVECTIVE DRYING, HEAT PUMP INSTALLATION, INTENSIFICATION