Thermo-mechanical aging during churning in grease lubricated bearings and its impact on grease life

Autor:	K.R. Sathwik Chatra, Jude A. Osara, Piet M. Lugt
Přispěvatelé:	Surface Technology and Tribology
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	Heat Transfer Entropy Mechanics of Materials Mechanical Engineering Churning Thermo-mechanical Aging UT-Hybrid-D Surfaces and Interfaces Energy Density Grease Life Surfaces Coatings and Films
Zdroj:	Tribology international, 181:108248. Elsevier
ISSN:	0301-679X
Popis:	Grease aging in a rolling bearing happens primarily during the churning phase due to high shear and temperature caused by macroscopic flow. This study utilizes a temperature profile to quantify the impact of thermo-mechanical aging on grease. Two different methods are explored to evaluate the energy dissipated in the grease during churning: one estimates the imposed energy density and the other calculates the heat transfer entropy density. Both models show a good correlation with the measured grease life. Grease life test results show that a high imposed energy density or heat transfer entropy density during churning results in shorter grease life. Therefore, a low energy density or heat transfer entropy density is preferred during churning.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf8defedd8e0e38372f16ed19dd81948 https://research.utwente.nl/en/publications/bbf143b1-f130-46d3-b62a-ce2f56201685 Zobrazit plný text záznamu Full Text from ScienceDirect