Analysis and Evaluation of the Correctness of the Function of a Friction Couple in the Aspect of the Second Law Thermodynamics

Authors

  • P. Bzura Politechnika Gdańska, Narutowicza 11/12, 80-952 Gdańsk, Wydział Oceanotechniki i Okrętownictwa, Katedra Siłowni Morskich i Lądowych

DOI:

https://doi.org/10.26408/108.02

Keywords:

operation of the friction couple, entropy, research hypothesis

Abstract

The article presents an authorial method for checking the correctness of the operation of a friction couple, treated as a tribological system in the aspect of the second law of thermodynamics, based on the analysis and evaluation of the results of laboratory tests performed on the test stand. A modified friction couple of the T-02 four-ball device was used as a test stand. An algorithm was presented, according to which empirical studies were performed. It was demonstrated that the test results confirmed the usefulness of the method of determining the total entropy of the friction couple for the analysis of the "harmful" action, enabling the assessment of the suitability of the lubricating fluid for the formation of lubricating film. The hypothesis was also formulated based on the analysis of results, which shows that the change in the average total entropy of the friction couple is indicative of a change in mode of action of the friction couple. This hypothesis was verified on the basis of the Anova test, taking Fisher LSD statistic into account.

References

ASTMD5183–05, 2016, Standard Test Method for Determination of the Coefficient of Friction of Lubricants Using the Four-Ball Wear Test Machine.

[2] Bzura, P., 2018, Influence of Lubricating Oil Improvers on Performance of Crankshaft Seals, Polish Maritime Research, vol. 25, no. S1(97), s. 172–177.

[3] Elwell, D., Pointon, A.J., 1976, Termodynamika klasyczna, PWN, Warszawa.

[4] Michalczewski, R., Szczerek, M., Tuszyński, W., Wulczyński, J., 2009, A Four-Ball Machine for Testing Antiwear, Extreme-Pressure Properties, and Surface Fatigue Life with a Possibility to Increase the Lubricant Temperature, Tribologia, vol. 1, s.113–127.

[5] PQSTAT Statystyczne Oprogramowanie Obliczeniowe, https://pqstat.pl/.

[6] Szargut, J., 2000, Termodynamika, Wydawnictwo Naukowe PWN, Warszawa.

[7] Tiong, C.I, Azli, Y., Abdul Kadir, M.R, Syahrullail, S., 2012, Tribological Evaluation of Refined, Bleached and Deodorized Palm Stearin Using Four-Ball Tribotester with Different Normal Loads, J. Zhejiang Univ. Sci., A.13–8, Zhejiang University, Hangzhou, China, s. 633–640.

[8] Tuliszka, E., 1978, Termodynamika techniczna, PWN, Warszawa – Poznań.

[9] Tyrkiel, E., 1987, Termodynamiczne podstawy materiałoznawstwa, PWN, Warszawa.

Published

2018-02-28

How to Cite

Bzura, P. (2018). Analysis and Evaluation of the Correctness of the Function of a Friction Couple in the Aspect of the Second Law Thermodynamics. Scientific Journal of Gdynia Maritime University, (108), 22–33. https://doi.org/10.26408/108.02

Issue

Section

Articles