Technology, energy, agriculture transport AIC

Volodymyr HOVORUKHA – Doctor of Physical and Mathematical Sciences, Professor, Head of the Department of Higher Mathematics, Physics and General Engineering Disciplines, Dnipro State Agrarian and Economic University (25 Serhiia Yefremova St., Dnipro, 49000, Ukraine; e-mail: hovorukha.v.b@dsau.dp.ua; https://orcid.org/0000-0002-0936-9272)

Nataliia PONOMARENKO – Candidate of Technical Sciences, Associate Professor, Dnipro State Agrarian and Economic University (25 Serhiia Yefremova St., Dnipro, 49000, Ukraine; e-mail: nanagieva@ukr.net; https://orcid.org/0000-0001-8263-2914)

Volodymyr DENYSENKO – Postgraduate Student, Dnipro State Agrarian and Economic University (25 Serhiia Yefremova St., Dnipro, 49000, Ukraine; e-mail: DenisK@ukr.net; https://orcid.org/0009-0000-2113-2000)

The article considers the issue of substantiating and optimizing the design parameters of the working chamber of a hammer crusher intended for grinding oil cake in order to improve the efficiency, productivity and energy performance of the grinding process. The relevance of the study is determined by the fact that the installed power of the electric drive of existing hammer crushers often does not fully correspond to the geometric dimensions and technological capabilities of the working chamber, which may limit throughput, reduce the stability of operation and increase specific energy consumption. The influence of the diameter of the working chamber, the effective area of the sieve and the diameter of its holes on the intensity of material grinding, pressure formation in the annular product layer, particle movement and sieve throughput is substantiated.
An experimental approach to determining the rational power of the electric drive depending on the main structural and technological parameters of the crusher is proposed. Particular attention is paid to the dependence of specific energy consumption on the degree of crusher loading, working chamber dimensions and sieve parameters, as well as to their influence on the quality and uniformity of the obtained ground product. The methodological basis of the work consists of experimental studies carried out on a specially manufactured crusher with a variable working chamber diameter ranging from 400 to 1200 mm. Barley with a moisture content of 13% was used as the model material during the experiments.
As a result of the research, rational operating modes were established that provide a favorable combination of minimum specific energy consumption, high productivity and the required grinding quality. The obtained dependencies make it possible to more accurately coordinate the power of the electric drive with the geometric parameters and throughput capacity of the working chamber. The research results can be used in the design, modernization and engineering calculation of hammer crushers for livestock and feed production, contributing to improved energy efficiency, reduced operating costs and more rational use of technological equipment.

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