Publication: Guía para el procesamiento y análisis de señales
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2010-11
Defense date
2010-12-03
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Abstract
Cuando se diseña una maquina se hace con la premisa de que esta tendrá una vida más o menos prolongada pero, en todo caso, limitada. Estas maquinas están compuestas por un gran número de elementos de los cuales destacamos aquellos que van ensamblados sobre ejes o árboles que a su vez están soportados por cojinetes o rodamientos ya que el fallo de alguno de estos elementos puede arrastrar a varios de ellos e incluso llegar a la inutilización de estos, para ello, en este Proyecto Fin de Carrera analizaremos los tipos de rodamientos y la defectologia que pueden presentar así como sus consecuencias y la manera de evitarlos haciendo posteriormente un estudio identificativo mediante el Software informático Matlab de los defectos tanto externos como internos sobre los rodamientos apoyándonos en los ejercicios contenidos en el libro de Simon Braun, “Discover the signal processing. An interactive guide for engineers”. Para esta identificación de defectos mediante el procesamiento de señales lo primero que se hizo fue la creación de una guía interactiva para el análisis y procesamiento de señales basándonos en el libro de S.Braun en el cual previamente se adaptó a la lengua española tanto sus textos como sus ejercicios, lo cuales están programados con el software informático Matlab. Una vez creada la guía la aplicaremos de manera practica en el diagnosis de maquinas y mecanismos centrándonos en el estudio de la defectologia en rodamientos. Para ello, escogimos la programación que más se ajustaba a nuestro caso práctico, en el que utilizaremos rodamientos de nueve bolas con defectos en el aro exterior, en el aro interior y sin defecto, para finalmente compararlos con los resultados obtenidos mediante las expresiones analíticas de BPFO (Ball Pass Frecuency of the Outer race) y BPFI (Ball Pass Frecuency of the inner race).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
When designing a machine is done with the premise that this will have a more or less prolonged, but in any case limited. These machines are composed of a large number of items which we highlight those that are assembled on shafts or trees that in turn are supported by bearings or ball bearings and the failure of any of these can drag some of them and even get the marking of these, for this reason, this thesis will analyze the types of bearings and defectology which may have their consequences and how to avoid making a further study by identifying the computer software Matlab external defects on bearings and internal building on the exercises contained in the book of Simon Braun, "Discovering the signal processing. An interactive guide for engineers”. For this identification of defects by signal processing the first thing he did was to create an interactive guide to the analysis and signal processing based on the book by S. Braun which previously was adapted to the Spanish language as their texts and their exercises, which are programmed with computer software Matlab. Once created the guide is used for a practice in the diagnosis of machines and mechanisms focusing on the study of disabilities in bearings, for this, we chose the timing that best matched our case study, which will use nine ball bearings with defects in the outer ring on the inner ring and without defects, and finally compare the results obtained by the analytical expressions of BPFO (Ball Pass Frequency of the Outer race) and BPFI (Ball Pass Frequency of the inner race).
When designing a machine is done with the premise that this will have a more or less prolonged, but in any case limited. These machines are composed of a large number of items which we highlight those that are assembled on shafts or trees that in turn are supported by bearings or ball bearings and the failure of any of these can drag some of them and even get the marking of these, for this reason, this thesis will analyze the types of bearings and defectology which may have their consequences and how to avoid making a further study by identifying the computer software Matlab external defects on bearings and internal building on the exercises contained in the book of Simon Braun, "Discovering the signal processing. An interactive guide for engineers”. For this identification of defects by signal processing the first thing he did was to create an interactive guide to the analysis and signal processing based on the book by S. Braun which previously was adapted to the Spanish language as their texts and their exercises, which are programmed with computer software Matlab. Once created the guide is used for a practice in the diagnosis of machines and mechanisms focusing on the study of disabilities in bearings, for this, we chose the timing that best matched our case study, which will use nine ball bearings with defects in the outer ring on the inner ring and without defects, and finally compare the results obtained by the analytical expressions of BPFO (Ball Pass Frequency of the Outer race) and BPFI (Ball Pass Frequency of the inner race).
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Keywords
Rodamientos, Proceso de señales, MATLAB