Abstract
A fluorescent technique was applied to study non-steady state grease lubrication in a ball-on-disk concentrated contact. Fluorescent grease was developed, which enabled dynamic behaviour of the base oil of the grease to be visually observed with an optical microscope and a normal CCD camera. Rolling and sliding tests were conducted under constant and reciprocating speed conditions. The fluorescence images clearly showed the occurrence of inlet oil starvation by repeated contact, where base oil was pushed out from the track leaving behind the thickener carrying less oil, but carrying gaseous cavities. In reciprocating rolling, oil starvation was generally less severe at slower speed, as in the case of uni-directional rolling. However, there was an obvious delay in oil recovery upon reversal of motion as compared to that in oil lubrication, and the delay appeared to be significant at higher acceleration. In reciprocating sliding, oil starvation was retarded due to a pileup of grease stagnating at the leading and trailing wedges of the conjunction.
| Original language | English |
|---|---|
| Pages (from-to) | 285-294 |
| Number of pages | 10 |
| Journal | Tribology Series |
| Volume | 39 |
| Publication status | Published - Jan 1 2001 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
Study of non-steady state grease lubrication with fluorescence microscope. / Sugimura, Joichi; Akiyama, M.
In: Tribology Series, Vol. 39, 01.01.2001, p. 285-294.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Study of non-steady state grease lubrication with fluorescence microscope
AU - Sugimura, Joichi
AU - Akiyama, M.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - A fluorescent technique was applied to study non-steady state grease lubrication in a ball-on-disk concentrated contact. Fluorescent grease was developed, which enabled dynamic behaviour of the base oil of the grease to be visually observed with an optical microscope and a normal CCD camera. Rolling and sliding tests were conducted under constant and reciprocating speed conditions. The fluorescence images clearly showed the occurrence of inlet oil starvation by repeated contact, where base oil was pushed out from the track leaving behind the thickener carrying less oil, but carrying gaseous cavities. In reciprocating rolling, oil starvation was generally less severe at slower speed, as in the case of uni-directional rolling. However, there was an obvious delay in oil recovery upon reversal of motion as compared to that in oil lubrication, and the delay appeared to be significant at higher acceleration. In reciprocating sliding, oil starvation was retarded due to a pileup of grease stagnating at the leading and trailing wedges of the conjunction.
AB - A fluorescent technique was applied to study non-steady state grease lubrication in a ball-on-disk concentrated contact. Fluorescent grease was developed, which enabled dynamic behaviour of the base oil of the grease to be visually observed with an optical microscope and a normal CCD camera. Rolling and sliding tests were conducted under constant and reciprocating speed conditions. The fluorescence images clearly showed the occurrence of inlet oil starvation by repeated contact, where base oil was pushed out from the track leaving behind the thickener carrying less oil, but carrying gaseous cavities. In reciprocating rolling, oil starvation was generally less severe at slower speed, as in the case of uni-directional rolling. However, there was an obvious delay in oil recovery upon reversal of motion as compared to that in oil lubrication, and the delay appeared to be significant at higher acceleration. In reciprocating sliding, oil starvation was retarded due to a pileup of grease stagnating at the leading and trailing wedges of the conjunction.
UR - http://www.scopus.com/inward/record.url?scp=0035526887&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035526887&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0035526887
VL - 39
SP - 285
EP - 294
JO - Tribology Series
JF - Tribology Series
SN - 0167-8922
ER -