Investigation of the process of wedging of roller stopper for slope belt conveyor

Purpose. Establishing the interaction parameters of the elements of an open-type energy-saving braking device that acts instead of shoe brakes to prevent the belt with the load from reversing during conveyor braking. The methods. The are the method of analysis of scientific sources by modes, means of braking of sloped belt conveyors; methods of theoretical mechanics for the development of mathematical modeling of the process of wedging of the stopper; analysis of the obtained dependencies between the geometric parameters of the stopper; analysis, synthesis, generalization, argumentation for the formulation of conclusions and recommendations in substantiating the rational parameters of the open-type roller stopper and developing a methodology for its calculation is used. Findings. The mathematical model of the process of wedging of an open-type roller stopper was created to prevent the belt with the load from reversing during conveyor braking, which allowed us to theoretically substantiate the influence of the wedging angle, the reduced sliding friction angle, and the rolling friction angle on the conditions of wedging of the roller without slipping. The necessity and practical possibility of increasing the wedging angle, using a curved working surface of the stopper to ensure the constancy of the wedging angle, using rubber coating to increase the wedging angle and ensure reliable wedging when braking an slope belt conveyor are substantiated. The originality. Analytical dependencies have been established that determine the conditions for wedging a roller without slipping, which ensure stable operation of the roller stopper to prevent the belt with the load from reversing when braking an slope conveyor; an analytical dependency that determines the wedging angle in an open-type roller stopper when a roller wedging without slipping, which will allow us to substantiate its rational parameters and develop a calculation method. Practical implementation. The results obtained will allow developing recommendations for ensuring sustainable and effective use of open-type roller stoppers on slope belt conveyors, to ensure increased safety, reliability, service life, and reduction of capital and operating costs of conveyor transport.