Aplicación de la ingeniería de la fiabilidad a los montacargas de pasillos estrechos de la Empresa Ecuaestibas en el Puerto Marítimo de Guayaquil.

Abstract

A reliability study to short step freight elevators was carried out to reduce the economic losses caused by the breakdowns in this equipment in the Enterprise Ecuaestibas of Guayaquil. Data from ten freight elevators were collected. From the data the analysis of the functions of the elements of the freight elevators as conducted to elaborate its antifunctions wich determines

the cause provoking thouse breakdown which is known as breakdown mode. Once these function, the breakdown, the breakdown modes where obtained, a calculus of the mean times between breakdowns occurring in the 2014 2015 period were carried out. With the calculing, it was possible to perform inspections to the hydraulic, electric, structural, and movement systems conforming the equipment previous to the breakdown occurrence. Due to the fact that the breakdown modes occurring in the freight elevators were already analyzed and whose items should deserve attention for this study supported in the parameters wich call for inspection the technical norms ANSI B56.1 of United States, NTP 715 of Spain and NT 22 of Ecuador. The mean times between the systems breakdown is 819 hours, the electric system 1027 hours, the movement system 820 hours and the structural system 821 hours; the electric system presents a total of 103.5 hours followed by the hydraulic systems with 97.5 hours breakdown, the movement system with 50 hours and the structural system with 47,5 breakdown. It´s concluded that the economic losses of maintenance are reduced if the reliability engineering is applied, reducing at the same time the breakdowns occurring to the freight elevators. It´s recommended to apply the maintenance plan proposed for the freight elevator equipment of enterprise Ecuaestibas.