CONCEPTUAL MODEL OF SYSTEM OF MAINTENANCE AND REPAIR OF COMPLEX TECHNICAL SYSTEMS

Abstract

Introduction. Improving the reliability and durability of marine equipment is largely due to timely fault forecasting, maintenance and repair of the equipment itself. All this is possible in the development of maintenance systems for complex technical systems. Purpose. The purpose of the article is to develop a control system for maintenance of rotary ship equipment. Results. The article highlights and reveals 5 conceptual approaches to maintenance and repair of rotor technical systems. Namely: as needed, planned and preventive, by state, proactive and mixed. It is concluded that it is most appropriate to use conceptual approaches “by state” or “mixed”. A number of international standards are analyzed, the integrated use of which can serve as a basis (theoretical basis) for the development and implementation of the optimal maintenance system on ships. The conceptual model of the system of maintenance and repair of ship technical means which allows to increase efficiency of the organization and management of maintenance and repair of rotor mechanisms on an example of the centrifugal pump NCV 63 \ 30 is offered. Explained and given an explanation of each stage of the model. The characters of failures and methods of their diagnosis are analyzed. Understanding the physical processes underlying the faults of different types, as well as collecting data related to the previous use of the machine, its maintenance, control results, period of failure, the nature of the machine in different conditions with different performance indicators are needed to predict development malfunctions. Based on this, a table with an illustrative example of the classification of the severity of the consequences of failure is given. Risk maps have been developed based on the analysis of types, consequences and criticality of failures or FMECA. The influence of malfunctions of rotary mechanisms on the generation of future failures is analyzed. A method for predicting the occurrence and origin of defects based on a regression model has been developed. The results were processed by a polynomial model with a degree from 2 to 10. Conclusions. Thus, the implementation of the model will significantly reduce the cost of maintenance and repairs of equipment, reduce the duration of its downtime and, ultimately, increase the reliability and efficiency of rotary technical systems.