Investigation Of Condition-Based Maintenance Based On Fuzzy Comprehensive Evaluation For Induced Draft Fan

This thesis discusses the theory, method, mathematics model, and management information system design about Condition-Based Maintenance, sequenced detection and reliability evaluation of generate equipments for induced draft fan. Based on the actual state of equipments maintenance of the domestic and international electricity power enterprise, the problem of Condition-Based Maintenance for induced draft fan is put forward in this thesis. The basic steps and technology organizing of CBM is dissertated in detail in the thesis, the concept of sequenced detection is introduced. For evaluating the reliability of equipments, some usual method is enumerated in this thesis. The basic principle and application characteristic is compared. Through analyzing the basic principle of fuzzy mathematics, several mathematics models of the fuzzy comprehensive evaluation are put forward in this thesis. To the concrete equipment of Induced draft fan, its systematic border and main performance parameters is analyzed at first, and then, by the method of fuzzy comprehensive evaluation, the reliability state of Induced draft fan is evaluated on two different kinds of situation, some quantitative results are gotten about the reliability state of the equipment. According to the results , the policy of maintaining type is gotten out for equipment maintenance. The thesis analyses the possible reason causing the reliability state of Induced draft fan to change, it also analyses the treatment methods. The theory on management information system developing and designing is introduced in this thesis. Combining with the actual project, a management information system is designed for power plant. Database technology, network technology and ASP technology is used in the system. It decompounds standard of equipments sequenced detection in power plant, realizes information management for standard and result of sequenced detection, and offers the support on technology for sequenced detection management and CBM of power plant. Finally, the thesis summarizes the studies and puts forward problems for further studies.