The effect of the distribution of variable characteristics determining the asymmetry of the sealing rings sliding surfaces on the values of friction loss coefficients and other selected parameters of oil film

• Autorzy: Wróblewski P.

Identyfikatory

DOI

10.19206/CE-2017-418

• Języki publikacji: EN

Abstrakty

EN

The article presents the results of research on the effect of the change in coordinates that determine the location of the common vertex of the parabolas and ellipses demonstrating the asymmetric shape of the rings sliding surfaces on the change in the thickness of oil film, the amount of scraped oil, and the oil left on the cylinder wall, once a set of selected sealing rings has passed, as well as the results concerning friction losses. Mathematical relationships of the asymmetric shapes of the rings sliding surfaces were presented, and the values of coefficients characterizing selected parameters of oil film and friction losses were determined. It was confirmed that there is a large dependence of the coordinate values of the vertices determining the asymmetric shapes of these surfaces on the condition and cooperation between piston rings and the cylinder bearing surface, and mainly on the amount of the oil scraped in the selected engine strokes.

Słowa kluczowe

EN

rings asymmetrical sliding surface; friction loss; oil film

PL

straty tarcia; film olejowy

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2017
• Tom: R. 56, nr 4
• Strony: 107--116
• Opis fizyczny: Bibliogr. 7 poz., wykr.

Twórcy

autor

Wróblewski P.

• Faculty of Machines and Transport at Poznan University of Technology

Bibliografia

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• [2] KOSZAŁKA, G. Application of the piston-rings-cylinder kit model in the evaluation of operational changes in blowby flow rate. Maintenance and Reliability. 2010, 4, 72-81.
• [3] TIAN, T. Dynamic behaviors of piston rings and their practical impact – part ii: oil transport, friction, and wear of ring/liner interface and the effects of piston and ring dynamics. Proc. Inst. Mech. Eng., Part J: Journal of Engineering Tribology. 2002, 216.
• [4] WOLFF, A. Numerical analysis of piston ring pack operation. Combustion Engines. 2009, 2, 128-141.
• [5] WOLFF, A. Modelowanie i symulacja numeryczna funkcjonowania pakietu pierścieni tłokowych dwusuwowego silnika okrętowego. Zesz. Nauk. Inst. Pojazd., Wydz. Sam. I Masz. Robocz., Warsaw University of Technology. 2011, 1(82), 5-17.
• [6] WOLFF, A. Numerical analysis of piston ring pack operation of a marine two-stroke engine. Combustion Engines. 2011, 146(3).
• [7] WRÓBLEWSKI, P., ISKRA, A. Geometry of shape of profiles of the sliding surface of ring seals in the aspect of friction losses and oil film parameters. Combustion Engines. 2016, 167(4), 24-38.