Formalization of roller stopper characteristics during braking and

Abstract

Purpose. Formalization of the characteristics of an energy-saving open-type braking device that acts instead of shoebrakes when braking and unbraking an slopebelt conveyor. The methods. The are the methods of theoretical mechanics for the development of mathematical modeling of wedgingperiods (without slipping and with roller slipping), wedged state and unwedging of the stopper; analysis and formalization of the obtained dependencies between the geometric parameters of the stopper; analysis, synthesis, generalization, argumentation for the formulating of conclusions and recommendations in substantiating the rational parameters of the open-type roller stopper is used. Findings. The mathematical models of wedgingperiods (without slipping and with roller slipping), wedged state and unwedging of an open-type roller stopper have been created, which allow us to present the process of braking an slopebelt conveyor by the stopper as a system that changes in space and time. The operating conditions and rational geometric parameters of the roller stopper during braking and unbraking of an slopeconveyor are substantiated. The originality. Analytical dependencies have been established that determine the conditions for wedging a roller with slipping, wedgedstate and unwedging of the stopper, which ensure stable operation of the open-type roller stopper during braking and unbraking of the slopebelt conveyor. Аnalytical dependencies have been established that determine the angle of roller wedgingwith sliding and the angle of the wedgedstate of the roller in the stopper during conveyor braking, as well as the angle of unwedging of the roller in the stopper during conveyor unbraking. Practical implementation. Formalization of the characteristics of an open-type roller stopper when braking and disbrakingan slopebelt conveyor will allow developing recommendationsfor ensure sustainable and effective use of this energy-saving braking device to ensure increased safety, reliability, service life, and reduction of capital and operating costs of conveyor transport.