Caracterización y análisis de falla de un variador de velocidades con engrane helicoidal de cobre acoplado a un tornillo sinfín de acero

Abstract

n this titling project is developed a failure analysis of the main components of the transmission mechanism in a worm-worm gear speed reducer used in the petroleum industry. First, information concerning to the technical characteristics of the reducer is collected by catalog, and is effected the measure of the most important parameters of the mechanical elements for modeling CAD modeling is performed, allowing geometric design verification. Then the characterization of the materials, using resources such as metallographic, chemical analysis and hardness, so that it is possible to study the mechanical properties, and also check to match the manufacturer's specifications is made. The failures found are also characterized, based on macrographs and analysis of typical particularities of different failure modes. It is made the calculation of stresses in the teeth of the crown, the results of which are supported by simulation software AUTODESK INVENTOR 2015. Finally it is proposed the calculation of the maximum torque in the reducer output shaft at which the failure of the teeth of the worm gear occurs, so that could be used in the analysis of charges for equipment with similar characteristics.