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On the importance of the experimental setup design in hydrodynamic journal bearing friction measurement
ID
Gosar, Aleš
(
Author
),
ID
Klemenc, Jernej
(
Author
),
ID
Nagode, Marko
(
Author
),
ID
Oman, Simon
(
Author
)
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MD5: 71B14072D9A5753179671129B2CFB2AB
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https://www.sciencedirect.com/science/article/pii/S0301679X24005528
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Abstract
Improving operating conditions and reducing the friction-related power losses of hydrodynamic journal bearings could lower emissions and contribute to efforts for a faster green transition. Experimental studies play an important role in evaluating and improving the performance of plain journal bearings. The concept of the experimental setup for friction measurements of journal bearings is well defined in the relevant standards, but the actual design is always left to the researchers conducting a particular study. Our study reveals that common practical assumptions about the frictional power losses caused by components of the experimental setup can lead to misleading conclusions about the measured coefficient of friction. The research premises were tested on the developed experimental setup using two methods for measuring the coefficient of friction and different load interfaces. In particular, the direct torque measurement using strain gauges on the shaft demonstrated the strongest correlation with theoretical values. However, the result was affected by the correct evaluation of the frictional losses of the support ball bearings. Conversely, the Stribeck curves showed that the combination of the indirect cantilever method and load interface with direct radial force application led to inferior results. The intricate interactions between setup components and unknown frictional conditions made straightforward geometric corrections challenging. The study encourages researchers in the field to critically assess their experimental setups and to rely on their own assessment of frictional losses.
Language:
English
Keywords:
plain journal bearing
,
coefficient of friction
,
frictional torque
,
experimental setup
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
Publication status:
Published
Publication version:
Version of Record
Year:
2024
Number of pages:
13 str.
Numbering:
Vol. 197, art. 109800
PID:
20.500.12556/RUL-158197
UDC:
539.92:531.4:621.8
ISSN on article:
0301-679X
DOI:
10.1016/j.triboint.2024.109800
COBISS.SI-ID:
196777987
Publication date in RUL:
29.05.2024
Views:
98
Downloads:
37
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Record is a part of a journal
Title:
Tribology international
Shortened title:
Tribol. int.
Publisher:
Elsevier
ISSN:
0301-679X
COBISS.SI-ID:
26558976
Licences
License:
CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:
http://creativecommons.org/licenses/by-nc/4.0/
Description:
A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
Secondary language
Language:
Slovenian
Keywords:
drsni ležaji
,
eksperimentalno vrednotenje
,
koeficient trenja
,
preizkuševališče
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0182
Name:
Razvojna vrednotenja
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