Dynamic model of the electromagnetic impact mechanism of the electric rock drill

The expediency of using electric rock drills for percussion-rotary drilling of holes and boreholes in remote areas with difficult surface relief and limited access to external power sources is substantiated. The object of research is a single-coil electromagnetic impact mechanism with an elastic reversal of the striker, with adjustable frequency and impact energy values. This unit is made according to a scheme with a central technological channel. It is powered by an energy source with limited power. The dynamic model is based on differential equations reflecting the electrical and mechanical balance of the impact mechanism taking into account the boundaries of motion of the impact mass of the striker and impact interactions in the mechanical system. The calculation of the model is carried out by means of computer simulation in Matlab Simulink based on numerical methods. The dependence of the energy on the frequency of impacts for the given parameters of the impact mechanism is obtained. The simulation results are agreed with the results obtained on the physical model. The calculation error of the dependence of the energy on the frequency of impacts does not exceed 6%, which is permissible for solving problems of design calculation.

Keywords: Mining and construction work, drilling holes and boreholes, electric rock drill, electromagnetic impact mechanism, dynamic model, mechanical oscillatory system, analysis of working procedures, impact energy, impact frequency, efficiency.
For citation:

Neyman L. A., Neyman V. Yu. Dynamic model of the electromagnetic impact mechanism of the electric rock drill. MIAB. Mining Inf. Anal. Bull. 2022;(12-2):190—202. [In Russ]. DOI: 10.25018/0236_1493_2022_122_0_190.

Issue number: 12
Year: 2022
Page number: 190-202
ISBN: 0236-1493
UDK: 621.313.282:621.928.235
DOI: 10.25018/0236_1493_2022_122_0_190
Article receipt date: 24.01.2022
Date of review receipt: 27.09.2022
Date of the editorial board′s decision on the article′s publishing: 10.11.2022
About authors:

Neiman L. A., Dr. Sci. (Eng.), Professor, http://orcid.org/0000-0002-3442-6531, Novosibirsk State Technical University, 630073, Novosibirsk, Karl Marx Avenue, 20, Russia, e-mail: neyman31@gmail.com;
Neiman V. Yu., Dr. Sci. (Eng.), Head of the Department, http://orcid.org/0000-0002-84331610, Novosibirsk State Technical University, 630073, Novosibirsk, Karl Marx Avenue, 20, Russia, E-mail: nv.nstu@ngs.ru;


For contacts:

Neiman Vladimir Yurievich, e-mail: nv.nstu@ngs.ru.


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