The definition of the radial dimensions of the oncoming counterblow grinder

The article discusses the design of the main parameters of the oncoming counterblow grinder. The grinders have a fairly simple device and compact design, have a direct drive of external and internal disks from standard electric motors. They are used both in industry when grinding small volumes of gravel and sand materials, and for sample preparation in testing laboratories. Studies of the processes of grinding materials by counter impact in general, and in particular, by a rotary counter impact grinder have not been studied in sufficient detail. The paper solves the actual problem of developing a missing methodology for calculating the basic geometric parameters of the grinder in question during its design. The authors, based on the generalization of their own design experience, proposed a methodological approach to determining the geometric parameters of the rotor of the oncoming impact grinder. It is shown that two ways of designing are possible: without minimizing the head and with ensuring the minimum head of the rotor-fan. The results of the calculations performed according to the given empirical dependencies made it possible to formulate appropriate recommendations on the radius, rotor gaps, and sizes of active elements. Operational and technological criteria for the destruction of various fractions of the material are taken into account. A verification calculation of the active elements for strength is provided. The material of the article will be useful for enterprises and organizations involved in the design, production and manufacture of shredders, students and postgraduates of universities.

Zubov V. V., Simisinov D. I., Frolov S. G. The definition of the radial dimensions of the oncoming counterblow grinder. MIAB. Mining Inf. Anal. Bull. 2024;(1-1):193—205. [In Russ]. DOI: 10.25018/0236_1493_2024_011_0_193.

Simisinov D. I., Dr. Sci. (Eng.), Docent, Head of the Mining Equipment Operation Department, Ural State Mining University 7sinov@mail.ru;
Zubov V. V., Cand. Sci. (Eng.), Associate Professor, Associate Professor of the Department Mining Equipment Operation Department, Ural State Mining University v.zubov.r66@ yandex.ru;
Frolov S. G., Cand. Sci. (Eng.), Docent, Head of the Department of Technology and Technical Mineral Exploration, Ural State Mining University sergey.frolov@m.ursmu.ru.

Simisinov D. I., 7sinov@mail.ru.

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