Selection of parameters of the electromagnetic impact unit of a perforator

Application of impact electromagnetic drives in the mining engineering and building sector provides high effectiveness of mechanical destruction of a rock or a building material when a bore-hole or a usual hole are drilled by means of a rotary-percussion drill. An electromagnetic impact unit should be improved because it is necessary to make it construction more rational and efficient. The paper states the results of investigations of the approach to rational design of electromagnetic impact unites of perforators and selection of their basic parameters with respect to a given value of the impact energy. The object of studies is the perforator impact unit implemented as a single-coil electromagnetic drive with the elastic reverse of its striker powered from a 50 Hz single-phase AC grid. The improved technique of the design of basic parameters of an electromagnetic impact unit is proposed. It is based on the generalized past experience of theoretical and experimental research. The first step of the design is preliminary one which is based on the determination of geometrical parameters of an electromagnetic impact unit and winding parameters of excitation coil. The second step is verifying one which is based on the estimation of the impact energy and the efficiency from the results of the first step. In contrast to existing approaches, the verifying calculation is executed by means of the created dynamical model of an impact unit that helps to analyze the operating process and visualize it. The mentioned above approach gives possibility to design basic parameters of impact units with adequate accuracy, reduces time and money expense and improves the quality of design.

Neyman V. Yu., Neyman L. A. Selection of parameters of the electromagnetic impact unit of a perforator. MIAB. Mining Inf. Anal. Bull. 2024;(11−1):129—142. [In Russ]. DOI: 10.25018/0236_1493_2024_111_0_129.

Neyman V.Yu.¹, Dr. Sci. (Eng.), Head of the Department, http://orcid.org/0000−0002−8433−1610, e-mail: nv_nstu@mail.ru;
Neyman L. A.¹, Dr. Sci. (Eng.), Professor, http://orcid.org/0000−0002−3442−6531, e-mail: neyman31@gmail.com;
¹ Novosibirsk State Technical University, 630073, Novosibirsk, Karl Marx Avenue, 20, Russia.

Neyman V. Yu., e-mail: nv_nstu@mail.ru.

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