Compression rings of low-speed high power engines

• Autorzy: Serdecki W. , Krzymień P.
• Języki publikacji: EN

Abstrakty

EN

The paper describes the design of compression rings used in low-speed, high power marine engines and it analyses relations between the most important operational parameters. Ring material, dimensions, geometry of sliding surfaces, distribution of circumferential pressure as well as operational conditions (thermal and mechanical loads, way of lubrication) were taken into consideration for the analysis mentioned above. Moreover, the paper points at modifications in ring geometry that have been happening for last years, comparing previous and recent designs. The effect of ring circumferential pressure against liner on the piston-cylinder assembly operation has been considered and the causes of its variability have been pointed out as well. When presenting the methods of measurement and tangential force calculations basic advantages and disadvantages have been presented as well as the evaluation of changes resulting from the ring circumferential wear. The compression ring mathematical model developed by the authors allows for a precise definition of relations between ring geometry and distribution of ring circumferential pressure. A need for a more accurate method of ring circumferential pressure evaluation has been justified in summary, giving hints necessaryfor its preparation.

Słowa kluczowe

EN

marine combustion engine; piston ring; compression ring; oil film

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 4
• Strony: 415--422
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Serdecki W.

autor

Krzymień P.

• Poznań University of Technology, Institute of Combustion Engines and Transport Piotrowo Street 3, 60-965 Poznań tel.:[phone],

Bibliografia

• [1] Iskra, A., Studium konstrukcji i funkcjonalności pierścieni w grupie tłokowo-cylindrowej, Wydawnictwo PP, Poznań 1996.
• [2] Kierek, M., Przyrząd do pomiaru sprężystości pierścieni tłokowych, Wzór użytkowy nr 11028, 1999.
• [3] Marine Engine Programme, MAN B&W, Informator, 2007.
• [4] Piaseczny, L., Technologia naprawy okrętowych silników spalinowych, Wydawnictwo Morskie, Gdańsk 1992.
• [5] Piotrowski, I., Silniki okrętowe, Wydawnictwo Morskie 1983.
• [6] Piston Ring Manual, Published by GOETZE AG, D-5093, Burscheid, Germany, 1989.
• [7] Serdecki, W., Badania współpracy elementów układu tłokowo-cylindrowego silnika spalinowego, Wydawnictwo Politechniki Poznańskiej, Poznan 2002.
• [8] Serdecki, W., Wpływ zmian nacisku sprężystego pierścienia tłokowego na parametry filmu olejowego, Journal of KONES, 2002
• [9] Ship Power System – Wärtsilä, informatory, 2008.
• [10] Włodarski, J., Podstawy eksploatacji maszyn okrętowych, Akademia Morska w Gdyni, Gdynia 2006.