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Abstract(s)
Parte dos sistemas energéticos óleo-hidráulicos das centrais hidroelétricas portuguesas possuem entre 30 a 40 anos, sendo os equipamentos constituintes das mesmas provenientes, quase sempre, da extinta Sociedades Reunidas de Fabricações Metálicas (Sorefame). Para além de todo o know-how dessa empresa ter desaparecido com a sua extinção, nunca foram estabelecidos quaisquer parâmetros para a Manutenção Preventiva dos equipamentos. Esta ausência de informação tem levado à falta de manutenção dos equipamentos, o que resulta num aumento contínuo da incidência de paragens. Quase todos os equipamentos de uma barragem e os seus constituintes são suscetíveis a danos e deterioração caso não sejam alvo de uma manutenção adequada. Além disso, o custo de um programa de manutenção preventivo é baixo em comparação com os custos elevados das reparações, quando estes equipamentos são alvo de paragem. Um bom programa de manutenção preventiva irá salvaguardar o correto funcionamento de grupos energéticos óleos-hidráulicos das centrais hidroelétricas, prolongando o seu tempo de vida útil e reduzindo a probabilidade de falha. O trabalho apresentado nesta dissertação tem como objetivo o estudo de um histórico de avarias mais recorrentes num equipamento de uma central hidroelétrica, através de uma análise de Fiabilidade, visando o desenvolvimento de um plano de manutenção preventivo para o mesmo. Espera-se que, com que o plano de manutenção, se consiga diminuir os custos diretos e indiretos que as avarias provocam na central, assegurando assim a disponibilidade do equipamento ao nível pretendido e obtendo o máximo rendimento do equipamento prolongado a sua vida útil
Part of the oil-hydraulic energy systems of the portuguese hydroelectric power plants are between 30 and 40 years old, and the equipment constituting them were supplied by the now extinct Sociedade Reunidas de Fabricações Metálicas (Sorefame). Besides all the knowledge of that company having disappeared with its extinction, the equipment manufacturer did not establish any kind of parameters for the system's Preventive Maintenance. This lack of information has led to a lack of maintenance of such a specific piece of equipment, resulting in a continuous increase in the incidence of shutdowns. Every component of a dam and its materials are susceptible to damage and deterioration if not properly maintained. Moreover, the cost of a preventive maintenance program is low compared to the excessive cost of repairs when they stopped. A good preventive maintenance program will safeguard the correct operation of power plant hydraulic oil groups, extending their useful life and reducing the probability of failure. This report aims to study, which will serve to develop a preventive maintenance plan, based on the history of the most recurrent failures of power plants, through a Reliability Analysis. It is expected that this study can reduce the direct and indirect costs that a failure in this type of equipment causes in a Power Plant, ensuring the availability of the equipment at the desired level and obtaining the maximum performance of the equipment prolonging its useful life
Part of the oil-hydraulic energy systems of the portuguese hydroelectric power plants are between 30 and 40 years old, and the equipment constituting them were supplied by the now extinct Sociedade Reunidas de Fabricações Metálicas (Sorefame). Besides all the knowledge of that company having disappeared with its extinction, the equipment manufacturer did not establish any kind of parameters for the system's Preventive Maintenance. This lack of information has led to a lack of maintenance of such a specific piece of equipment, resulting in a continuous increase in the incidence of shutdowns. Every component of a dam and its materials are susceptible to damage and deterioration if not properly maintained. Moreover, the cost of a preventive maintenance program is low compared to the excessive cost of repairs when they stopped. A good preventive maintenance program will safeguard the correct operation of power plant hydraulic oil groups, extending their useful life and reducing the probability of failure. This report aims to study, which will serve to develop a preventive maintenance plan, based on the history of the most recurrent failures of power plants, through a Reliability Analysis. It is expected that this study can reduce the direct and indirect costs that a failure in this type of equipment causes in a Power Plant, ensuring the availability of the equipment at the desired level and obtaining the maximum performance of the equipment prolonging its useful life
Description
Keywords
Manutenção Industrial Manutenção Preventiva Fiabilidade de Sistemas Manutenção Centrada na Fiabilidade Industrial Maintenance Preventive Maintenance System Reliability Reliability Centered Maintenance