# Shebanin V., Atamanyuk I., Gorbenko O., Dotsenko N. Determining the optimal parameters of machines for processing the seed mass of vegetable and melon crops

UDC 631.361.8

Shebanin V.

Atamanyuk I.

Gorbenko O.

Dotsenko N.

The article presents a method of mathematical modeling, which is based on a nonlinear canonical distribution of a random vector, to determine the optimal parameters of machines for the separation of seed mass of vegetable and melons. It is presented a block diagram of the procedure for calculating the parameters of canonical decomposition.The method of mathematical modeling was tested in the study of the technological process of separating melon seeds in the experimental setup. There are described third-order mathematical models for purity and seed loss, that presented the technological process of a melon seed separation based on a nonlinear canonical decomposition of a random vector. Using this method allows to obtain mathematical models of technological processes for an arbitrary number of known input parameters that are used to evaluate seed characteristics, nonlinearity order, and stochastic coupling characteristics. The proposed mathematical model allows to take into account the peculiarities of technological processes of seed separation and, as a result, to achieve the maximum quality of division of seeds of melons. There are the described stages of the mathematical modeling method, which is based on a nonlinear canonical distribution of a random vector, to determine the optimal parameters of machines for the separation of seed mass of vegetable and melons. The method is tested on the basis of the technological process of seed separation using an experimental sample of a cylindrical separator. Statistical experimental data processing allows to obtain third-order mathematical models for purity and seed loss, describing the process of separation of melon seeds on a cylindrical machine. The results of the experimental studies confirmed the high accuracy of the proposed method, which can be used to simulate an arbitrary process with stochastic properties. Refinement of the parameters of the working bodies of machines on the basis of advanced mathematical models will facilitate the development of industrial seed production.

Keywords: vegetable and melon crops, seed mass separation, mathematical method, optimal parameters.

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# D. Babenko, O. Gorbenko, N. Dotsenko, N. Kim. Theoretical aspects of oil separation process by pressing.

UDC 631.363:633.8

DOI: 10.31521/2313-092X/2018-3(99)-16

D. Babenko, O. Gorbenko, N. Dotsenko, N. Kim.

In the article it is presented the analysis of constructive solutions of screw presses that are used for different types of oilseeds. An analysis of the characteristics and using of press equipment in different countries of the world has shown that the principles of action and workflow are the same. Application of oily presses in the conditions of farms with small volumes of oilseeds processing indicates a number of shortcomings, which include the low production of oil in one pass, increased time that spent on cleaning the press from clogging, which contributes to a significant decrease in productivity of the machine and the need for manual pushing pulp from bunker in the receiving and preparing chamber during repeated compression. There are indicated the theoretical aspects of the pressing process, the main technological parameters that influence on the intensity of the separation of oil from the pulp, which include: the speed of the screw shaft, the degree of seizing of the pulp by the first turn, the physical and mechanical properties of the pulp and the degree of wear of the surface of the screw turns. Investigation of these parameters and including into the industrial production of press equipment the results of research will eliminate the problem points according to the application in the technological process of oil production.

Key words: oilseeds, screw shaft, parameters of work, pulp, oil screw press.

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