Details
| Original language | English |
|---|---|
| Article number | 114 |
| Journal | Tribology Letters |
| Volume | 70 |
| Issue number | 4 |
| Early online date | 26 Sept 2022 |
| Publication status | Published - 2022 |
Abstract
A common application for grease-lubricated oscillating rolling element bearings is, e.g., rotor blade bearings in wind turbines. These bearings mainly operate under conditions that are prone to starvation. If the grease is unable to provide enough inlet lubricant supply for the contact between rolling element and bearing raceway, wear in the form of False Brinelling and thus premature bearing failure is possible. Bearing experiments with different lithium complex model greases, which differ mainly in their base oil viscosity and oil separation rate, were carried out to show the influence of the grease parameters on wear initiation. The results show that the ability of the grease to release a high amount of base oil with high mobility into the track of the rolling element is a crucial mechanism to prevent wear, especially at small oscillation angles. For oscillation angles larger than a critical angle, a secondary replenishment mechanism may prevent early wear initiation. The experimental results are used to validate a starvation model proposed in earlier work (Wandel et al. in Tribol Int 165:107276, 2022).
Keywords
- Rolling element bearings, Wear, Grease lubrication, Wind turbine bearing, False brinelling, Starvation, Oscillating bearings, Re-lubrication
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Surfaces, Coatings and Films
- Physics and Astronomy(all)
- Surfaces and Interfaces
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In: Tribology Letters, Vol. 70, No. 4, 114, 2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Starvation and Re-lubrication in Oscillating Bearings: Influence of Grease Parameters
AU - Wandel, Sebastian
AU - Bader, Norbert Fritz
AU - Glodowski, Jakob
AU - Lehnhardt, Bela Jannis
AU - Leckner, Johan
AU - Schwack, Fabian
AU - Poll, Gerhard
N1 - Funding Information: The authors would like to thank Muyuan Liu , Josephine Kelley , and Volker Schneider for their professional advice, Marvin Woersdoerfer for the help with the experimental work and Peter Schönemeier for the help with the commissioning of the test rig. This document is a result of the research project HBDV ’Highly Accelerated Pitch Bearings’ (Grant number 0324303A) funded by the Federal Ministry for Economic Affairs and Climate Action (Germany).
PY - 2022
Y1 - 2022
N2 - A common application for grease-lubricated oscillating rolling element bearings is, e.g., rotor blade bearings in wind turbines. These bearings mainly operate under conditions that are prone to starvation. If the grease is unable to provide enough inlet lubricant supply for the contact between rolling element and bearing raceway, wear in the form of False Brinelling and thus premature bearing failure is possible. Bearing experiments with different lithium complex model greases, which differ mainly in their base oil viscosity and oil separation rate, were carried out to show the influence of the grease parameters on wear initiation. The results show that the ability of the grease to release a high amount of base oil with high mobility into the track of the rolling element is a crucial mechanism to prevent wear, especially at small oscillation angles. For oscillation angles larger than a critical angle, a secondary replenishment mechanism may prevent early wear initiation. The experimental results are used to validate a starvation model proposed in earlier work (Wandel et al. in Tribol Int 165:107276, 2022).
AB - A common application for grease-lubricated oscillating rolling element bearings is, e.g., rotor blade bearings in wind turbines. These bearings mainly operate under conditions that are prone to starvation. If the grease is unable to provide enough inlet lubricant supply for the contact between rolling element and bearing raceway, wear in the form of False Brinelling and thus premature bearing failure is possible. Bearing experiments with different lithium complex model greases, which differ mainly in their base oil viscosity and oil separation rate, were carried out to show the influence of the grease parameters on wear initiation. The results show that the ability of the grease to release a high amount of base oil with high mobility into the track of the rolling element is a crucial mechanism to prevent wear, especially at small oscillation angles. For oscillation angles larger than a critical angle, a secondary replenishment mechanism may prevent early wear initiation. The experimental results are used to validate a starvation model proposed in earlier work (Wandel et al. in Tribol Int 165:107276, 2022).
KW - Wälzlager
KW - Verschleiß
KW - Fettschmierung
KW - Rotorblattlager
KW - Rolling element bearings
KW - Wear
KW - Grease lubrication
KW - Wind turbine bearing
KW - False brinelling
KW - Starvation
KW - Oscillating bearings
KW - Re-lubrication
UR - http://www.scopus.com/inward/record.url?scp=85139241294&partnerID=8YFLogxK
U2 - 10.1007/s11249-022-01655-7
DO - 10.1007/s11249-022-01655-7
M3 - Article
VL - 70
JO - Tribology Letters
JF - Tribology Letters
SN - 1023-8883
IS - 4
M1 - 114
ER -