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SAKAI, K. KOŠŤÁL, D. SHITARA, Y. KANETA, M. KŘUPKA, I. HARTL, M.
Originální název
Influence of Li Grease Thickener Types on Film Thicknesses Formed between Smooth and Dented Surfaces
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
The lubricant film thickness behaviors of lithium (Li) thickener type greases and their base oil were investigated for the contact between a glass disk and a smooth/dented steel ball using an optical interferometry. The main focus is to understand grease film behaviors including high speed history and contact surface conditions. A Li stearate thickened grease showed similar behaviors to the base oil itself and the thickener particles were not observed on the contact. Thickener particle entrainments were observed in greases with Li 12-hydroxy stearate and Li complex thickeners. Track patterns formed in the downstream of the contacts correlated with the thickener particle entrainments to the contacts. The Li stearate thickened grease showed quick starvation phenomenon without a scoop which maintains fully flooded conditions. The particle entrainments of Li 12-hydroxy stearate and Li complex thickened greases were less observed after measurements at high speeds. On the dented surfaces, the particle entrainments of the Li 12-hydroxy stearate grease were more frequent than those of Li complex grease. These results suggest that thickener chemical structures have influence on the grease film formation. The thickener with higher polarity could promote the entrainment of greases into contact.
Klíčová slova
grease, EHL, film thickness, lubricants, track pattern
Autoři
SAKAI, K.; KOŠŤÁL, D.; SHITARA, Y.; KANETA, M.; KŘUPKA, I.; HARTL, M.
Vydáno
31. 12. 2017
Nakladatel
Japanese Society of Tribologist
Místo
JAPAN
ISSN
1881-2198
Periodikum
Tribology Online
Ročník
12
Číslo
5
Stát
Japonsko
Strany od
262
Strany do
273
Strany počet
URL
https://www.jstage.jst.go.jp/article/trol/12/5/12_262/_pdf/-char/en
BibTex
@article{BUT142910, author="SAKAI, K. and KOŠŤÁL, D. and SHITARA, Y. and KANETA, M. and KŘUPKA, I. and HARTL, M.", title="Influence of Li Grease Thickener Types on Film Thicknesses Formed between Smooth and Dented Surfaces ", journal="Tribology Online", year="2017", volume="12", number="5", pages="262--273", doi="10.2474/trol.12.262", issn="1881-2198", url="https://www.jstage.jst.go.jp/article/trol/12/5/12_262/_pdf/-char/en" }