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Previous issue date: 2016-12-29 / Evitar falhas ? uma medida extremamente necess?ria quando se gerencia sistemas de produ??o e distribui??o de ?gua com 95% das redes pressurizadas diretamente por po?os. Baseado nas frequentes faltas de ?gua em 2015, registradas pela CAERN na Unidade de Opera??o e Manuten??o de ?guas de Parnamirim (UNAP), destacam-se as avarias causadas por sobreaquecimento e outros danos de natureza mec?nica e el?trica que levam a falhas nas instala??es de motobombas submersas. Nesse escopo, este trabalho foi dedicado a realizar um estudo de caso sobre as instala??es de quatro motobombas dos po?os PC, PD, PS e PI, com diferentes acionamentos el?tricos, utilizando a proposta da Roda de Falhas (Failure Wheel) numa an?lise preditiva el?trica e termogr?fica, para inferir qualitativamente sobre o n?vel de confiabilidade e custo de manuten??o na concession?ria de abastecimento d??gua. Para subsidiar as an?lises foram inspecionados itens importantes das referidas instala??es, observando suas rela??es de conformidade com as especifica??es das motobombas, onde foram efetuadas medi??es de par?metros el?tricos e t?rmicos de opera??o, incluindo vari?veis de estresse para auxiliar no diagn?stico e estimar os desempenhos dessas m?quinas. A an?lise foi conduzida por ficha de inspe??o de par?metros operacionais, checklist e pela Roda de Falhas em discuss?o, que permitiram diagn?sticos sobre os dados das inspe??es e do hist?rico de falhas recorrentes. Nesse sentido, a aplica??o da Roda de Falhas se deu com a adapta??o de um modelo para as motobombas submersas, identificando os principais mecanismos de danos associados ?s causas gerais de falhas, que demonstrou viabilidade em rotinas de manuten??o baseada na condi??o para an?lise detectiva-preditiva de falhas em curso nos equipamentos. Comparando o consumo espec?fico de energia entre as motobombas, a PI, com acionamento por inversor de frequ?ncia, obteve melhor rendimento, oferecendo maior efici?ncia energ?tica durante a capta??o d??gua entre julho de 2015 e julho de 2016. A mesma demonstrou risco reduzido de falhas t?picas de motobombas dentre os equipamentos, tendo em vista o menor n?vel t?rmico em opera??o apresentado nas termografias, e o menor estresse causado devido ?s caracter?sticas da chave de partida. Conclui-se, portanto, que seu n?vel de confiabilidade foi o maior, seguido da PS, PC e PD. As vantagens da aplica??o sistem?tica da proposta, aliada a uma pol?tica de manuten??o planejada, apontam para a redu??o de intercorr?ncias por falhas e perdas de produ??o, e com isso, permitem diminuir trocas prematuras de equipamentos e custos com manuten??o e energia el?trica. Como resultado da pesquisa obteve-se uma metodologia de acompanhamento preditivo, visando a??es de manuten??o antes da falha catastr?fica sobre itens em percurso de danos. / Avoiding failures is an extremely necessary measure when managing water production and distribution systems with 95% of networks pressurized directly by wells. Based on the frequent water shortages in 2015, registered by CAERN at the Parnamirim Water Operation and Maintenance Unit (UNAP), the most notable are the damages caused by overheating and other mechanical and electrical damages that lead to failures in the motor pump Submerged. In this scope, this work was carried out to carry out a case study on the installations of four well pumps PC, PD, PS and PI, with different electric drives, using the Failure wheel proposal in an electric predictive analysis And thermographic, to qualitatively infer about the level of reliability and cost of maintenance in the water supply concessionaire. In order to subsidize the analyzes, important items of the aforementioned facilities were inspected, observing their relations of conformity with the specifications of the pumps, where electrical and thermal parameters of operation were carried out, including stress variables to aid in the diagnosis and to estimate the performances of these machines. The analysis was carried out by a checklist of operational parameters, checklist and by Failure Wheel in discussion, which allowed for diagnoses on inspection data and the history of recurring faults. In this sense, the application of the Failure Wheel occurred with the adaptation of a model for the submersible pumps, identifying the main damage mechanisms associated to the general causes of failures, which demonstrated viability in maintenance routines based on the condition for detective-predictive analysis of faults in the equipment. Comparing the specific energy consumption between the pumps, the PI, with drive by frequency inverter, obtained better efficiency, offering greater energy efficiency during the water harvest between July 2015 and July 2016. It showed a reduced risk of failure Typical of motor pumps, among the equipment, considering the lower thermal level in operation presented in thermographs, and the lower stress caused due to the characteristics of the starter. It was concluded, therefore, that its reliability level was the highest, followed by PS, PC and PD. The advantages of the systematic application of the proposal, coupled with a planned maintenance policy, point to the reduction of intercurrences due to failures and losses of production, and with this, allow to reduce premature equipment changes and costs with maintenance and electric energy. As a result of the research, a methodology of predictive monitoring was obtained, aiming at maintenance actions before the catastrophic failure on items in the course of damages.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23550 |
| Date | 29 December 2016 |
| Creators | Pereira, Leandro Luiz da Silva |
| Contributors | 20300190468, http://lattes.cnpq.br/9043538628554844, Fontes, Lucio Angelo de Oliveira, 09443703491, http://lattes.cnpq.br/6626062514308083, Borges, Jacques Cousteau da Silva, 05430961493, http://lattes.cnpq.br/1988820873125145, Barbosa, Cleiton Rubens Formiga, Fontes, Francisco de Assis Oliveira |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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