Main problems of mine drum design

Abstract

Problem. The article deals with the problem of mine drums, namely, an adjusted approach to the justification of their design, and suggests ways to improve their operational properties. Mine drums ensure the reliable operation of the entire hoisting machine and often the safety of people themselves, so the topic discussed in the article is very relevant. Gool. The practice of designing mine drums is based on the use of elemental stiffeners, such as ribs, rings and braids. This significantly increases the weight and complexity of the drum manufacturing, and also leads to the appearance of local stresses at the welding points. In mine drums, not only the drum shell, but also the lining is loaded. Methodology. To increase their stiffness, they are reinforced with braids, which not only increases the weight of the drum itself, but also significantly complicates the technology. At the same time, the strength of the frontal lobes decreases, i.e. we have the opposite effect. This greatly complicates the operation of the structure and leads to the destruction of welds and cracks. Reinforcing the welds does not improve the situation, but, on the contrary, reduces the durability of the mine drum shell. Results. The calculations of the strength of the headwall by the simplified and refined methodology showed that the strength of the headwall is fully ensured and the need to install an additional structure in the form of scarves does not make sense. Originality. Additional factors were taken into account that were not considered in previous calculations, such as the stiffness of the headstays themselves and the coefficient of friction between the rope and the drum. Practical value. The application of the new methodology for calculating the strength of the mine rope drum shell proposed in this paper can significantly improve the operation of mine hoisting machines, reduce the number of repairs, and ensure their durability. In addition, the metal consumption of the drums is significantly reduced, which allows to obtain significant savings in their cost and ensure reliable operation of the entire mine hoisting process.