Review article
Ship Machinery Maintenance Concept Adjustment and Design
Ante BUKŠA
; Faculty of Maritime Studies in Rijeka, Rijeka, Croatia
Ivica ŠEGULJA
; Pomorski fakultet u Rijeci, Rijeka, Hrvatska
Vinko TOMAS
; Pomorski fakultet u Rijeci, Rijeka, Hrvatska
Abstract
The first part of the paper presents a survey of approaches to maintenance over the last thirty years. A structure of maintenance costs and maintenance concept adjustment and design (MA-CAD) of ship machinery (propulsion engine) is presented here, which provides the required safety level and lowest costs in a life cycle. Improvement and extension of the MA-CAD method can be achieved by analysis of the most common important parts of the propulsion engine that fail, mostly in operation, by designing maintenance intervals and planning spare parts quantity. A diesel-engine propulsion system with gearbox has been chosen for the research. The data on failure and maintenance activities at propulsion engine breakdown in a seaway within a period of thirteen years have been obtained from the engine′s log book. The critical parts that fail mostly in operation are defined by an analysis of breakdowns (registered failure cycles). The critical components include the exhaust valve, injection valve and fuel pump. The most vulnerable part of the propulsion engine is the exhaust valve with the highest failure rate. By application of the method mentioned we obtain a model for the maintenance concept adjustment and design. The suggested model consists of two parts (a new MA-CAD): the ship and office. The engine machinery behaviour is monitored aboard the ship (failures and maintenance functioning) and the data are sent to the office. On the basis of the data, the office performs the analysis and adjusts (the models) maintenance concept.
Keywords
Concept of maintenance; Costs; Diesel-engine propulsion system; Maintenance; Ship machinery
Hrčak ID:
43598
URI
Publication date:
30.6.2009.
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