Surveys aiming to isolate the main causes of severe marine diesel engine damages clearly indicate the need for a reliable method to perform real time monitoring of crank pin and big end bearing temperatures in large diesel engines. The main objective for installing such a system will be to reduce the risk of high cost damages and thus, increases the overall level of safety at sea. However, both the hostile environment inside large combustion engines and the need for a highly flexible system that easily can be installed and adjusted to different mechanical tolerances have kept existing solutions from being reliable methods of temperature monitoring on these rotating bearings. As an introduction to the main topic of the paper some selected information on engine damages and in particular damages following from a detected crosshead and/or crank pin bearing failure situation have been reviewed. Possible causes for such failures are also discussed. The section is closed by discussing alternative methods of detecting a bearing failure situation. Both indirect and direct methods of bearing temperature measurement have been discussed. In the main section of the paper it is described how a wireless technology based solution has been applied in the effort of developing a reliable real-time temperature monitoring system capable of being permanently installed in a diesel engine. Firstly, the principle of the applied radar technology is presented. Secondly, installations in both 2-stroke and 4-stroke engines are presented. This would be results from performed test installations and permanent installations in diesel engines. The paper ends with a summary of the major issues discussed and the implications that have been achieved in terms of increased operational safety of large combustion engines.
Wireless technology for real-time temperature monitoring of crank pin and crosshead bearings in diesel engines
Drahtlose Echtzeit-Temperaturüberwachung von Kurbelzapfen und Kreuzkopf-Lagern in Dieselmotoren
2004
6 Seiten, 11 Bilder, 1 Quelle
Conference paper
Storage medium
English
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