This work is aimed at determination of efficient capacity of an MVU-1500 air-and-screen grain cleaner at which extruder would process fed stock on the basis of designed multifactor experiment. On the basis of implementation of planning matrix, the mathematical model of the second order has been developed for determination of capacity of MVU-1500 air-and-screen grain cleaner upon classification of a heap of sunflower seeds. The maximum capacity of MVU-1500 air-and-screen grain cleaner upon classification of a heap of sunflower seeds in the section of optimum region with regard to feeding rate (C 0 ) of a heap of sunflower seeds into pneumatic channel, oscillation frequency (n) of cleaner shoe, and air flow rate (υ) in the pneumatic channel of final aspiration at zero level is 931 kg/h; the optimum parameters of these factors have been determined.

For the production of sunflower cake, various technologies, which need to be improved, are used; it will increase the nutritional value of the feed which is a topical problem. To make possible the quality assessment of the protein feed, when it is prepared with components from piles of sunflower seeds in real time, the process is carried out by using multimedia devices at the stage of clearing the pile of sunflower seeds, as well as milling the prepared feed. The uniform-pitch screw value of a serial extruder is directly proportional to the first winding pitch and inversely proportional to the number of winds. By increasing the flight screw constant number, the winding pitch decreases and the processed material becomes compact. Reduction of the winding pitch aliquot to the screw is carried out exponentially. The compression ratio of sunflower seed components to obtain protein feed of a cake form with a winding pitch decrease aliquot depends on the design parameters of the extruder screw, which enables to regulate the technological process of its preparation in crumbly and granular forms. It depends on the screw winding pitch with its number, and by increasing the screw winding pitch the compression ratio is decreased, and contrariwise, with decreasing screw winding pitch the compression ratio of the processed material (sunflower cake) is increased.

In modern seed-cleaning machines, pneumatic systems have been widely used in recent years. To minimize costs in pneumatic systems of seed-cleaning machines, while increasing performance and improving the functional efficiency, it is necessary to improve their constructive and technological parameters. Improving pneumatic system parameters requires the development of a methodology for modeling the processes of airflow motion for their qualitative characteristics. To improve the efficiency of the vertical pneumatic channel of air-sieve grain-cleaning machines, it has been proposed to modernize it, which will improve the quality of separation of sunflower seed heap in it. The device and technological process of operation of a modernized air-sieve grain-cleaning machine of the MVU-1500 type in sorting a heap of sunflower seeds are presented. The movement of the components of a sunflower seed heap in a vertical pneumatic channel of an air-sieve grain-cleaning machine of the MVU-1500 type is examined and the proportionality coefficients of the airflow for the components of a sunflower seed heap are determined. The obtained values of the theoretical proportionality coefficients of the airflow for the components of a sunflower seed heap vary widely depending on the composition (organic impurity – 0,015≤k≤0,061; seeds of the leading crop – 0,120≤k≤0,162; broken seeds – 0,096≤k≤0,115 and hulled seeds – 0,134≤k≤0,153). Mathematical modeling of the technological process of the improved air-sieve grain-cleaning machine of the MVU-1500 type makes it possible to increase the efficiency of the vertical pneumatic channel by 15-20% without deteriorating the quality of the material itself, as a result of which the specific energy consumption of the process will decrease.

The provision of animals and poultry with complete feed balanced in nutrition according to productivity is one of the key conditions for additional production and improvement of livestock quality and increase of protein. An improved sunflower cake grinder was proposed based on the given grinding techniques, which eliminates a number of disadvantages typical for serial products. Taking into account huge volumes of ground fodders, the problem of improving these grinders in terms of reducing their energy consumption is quite relevant. Besides, all known grinders are not suitable for sunflower cake grinding due to its physical and mechanical properties compared to other fodders. The paper describes the motion of the prepared sunflower cake along the surface of the cutting edge of knives in the form of a curved triangle of Archimedes arbelos with saw teeth in order to obtain it in a granular form. The Russian Patent 2648392 was obtained for the proposed design of the grinder, which allows expanding functional capabilities, reducing energy consumption of the process and improving the quality of grinding sunflower cake, which cannot be made by similar technical facilities. The knives in the grinder can be adapted for different fodder, both in granulated and dispersed form due to adjustment of distance between them depending on dimensions of processed material, which perform sliding cutting thus improving the efficiency of technological process. The obtained efficiency formula of the improved grinder allows increasing it depending on its design parameters and physical and mechanical properties of the material.

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