Three-dimensional transient temperature field of brake shoe during hoist's emergency braking

摘要

In order to exactly master the change rules of brake shoe's temperature field during hoist's emergency braking, the theoretical model of three-dimensional (3-D) transient temperature field was established according to the theory of heat conduction, the law of energy transformation and distribution, and the operating condition of mining hoist's emergency braking. An analytic solution of temperature field was deduced by adopting integral-transform method. Furthermore, simulation experiments of temperature field were carried out and the variation regularities of temperature field and internal temperature gradient were obtained. At the same time, by simulating hoist's emergency braking condition, the experiments for measuring brake shoe's temperature were also conducted. It is found, by comparing simulation results with experimental data, that the 3-D transient temperature field model of brake shoe is valid and practical, and analytic solution solved by integral-transform method is correct.