Desenvolvimento, simulação e construção de bancada rotativa para análise de vibrações no conjunto motor e redutor

Abstract

Mechanical vibrations are characterized by oscillatory motions around an equilibrium point. Sources of unwanted excitation can be very different, such as unbalance, misalignment and mounting problems of rotating machines, design problems, among others, which dramatically affects the life of machinery and equipment, directly impacting the industrial production. In the present work, it was designed, elaborated, implemented and developed a structure for testing rotational systems. The development of the geometric model was governed by the dimensions necessary for the provision of equipment belonging to the present structure, which was a three-phase motor with Weg 0,33cv and a gear reducer, Cestari brand, with a reduction of 1: 7.18. The preparation of this model was based on the study of the natural modes and frequencies of vibration. Thus, the commercial software SolidWorks was used, what was initially used for the preparation and development of the geometric model. In the second step, this software, using the Simulator extension, was used to perform simulations from the finite element method to estimate the natural frequencies of the structure. In the third step, the results were compared to the value of the frequency of operation of the equipment supported by the frame. Thus, it was possible to analyze different models and make corrections on points of less stiffness, in order to change the values of the natural frequencies of vibration.