Substantiation of the methodology for calculation of rope-capacity cylindrical drums of mine hoistmachine

Abstract

Purpose. To develop a simplified calculation method for the strengthened split cylindrical drums of mine hoisting machines of the TsR-6.75x6.2/1.95 type. To evaluate the application of the method for calculating the drum of a hoisting machine of a complicated design by averaging the elements. The methods. The drum structure of a mine hoisting machine is divided into ten nodes, eight of which include the shell, frontal, rib strengthening and brake discs (end nodes) and two more – the shaftwith hubs and bearing supports. Based on the analysis of the machine's operation, including an assessment of its stiffness under different types of load, simplified models are created for each component. The original drum assemblies are replaced with simplified ones in order to perform a general calculation to determine the maximum axial displacement of the brake disc edges. Findings. Based on the analysis of the mine hoisting machine operation, averaged models of hoist components were developed and axial displacements were successfully calculated for a simplified drum design. The originality. The error of the simplified calculation method, in particular, the method of averaging with increased thickness of the lobes, which allows obtaining more accurate results for complex structures, is estimated Practical implementation. Due to the need to increase the depth of mining, which leads to the need to expand the dimensions of the drum and complicate its design. In this case, the resource intensity of calculating the axial displacement of brake discs increases. This is necessary for the introduction of disc brakes. However, this complicates the use of standard mid-level computer-aided design tools due to the increase in the size of the finite element mesh, which makes its use impractical. The methodology can be used for mine hoisting machines of the following types TsR-6.75x6.2/1.95 with a split drum, 6750 mm in diameter and 6200 mm wide (of which 1950 mm is the interchangeable part), providing accurate calculations of brake disc edge displacements. This approach is particularly useful for use in mid-range software packages such as SolidWorks Simulation, eliminating the need for resource-intensive software.