Details
| Original language | English |
|---|---|
| Article number | 117 |
| Journal | Lubricants |
| Volume | 11 |
| Issue number | 3 |
| Publication status | Published - 7 Mar 2023 |
Abstract
Rotor blade bearings enable rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to frequent oscillation movements with amplitude ratios of (Formula presented.) > 1, especially due to new control concepts such as Individual Pitch Control, which can lead to wear and a reduction in service life. The objective of this paper was to identify the dominant wear mechanisms and their consequences for the operation of oscillating bearings. Oscillating experiments with an increasing number of cycles on the angular contact ball bearings of two different sizes (types 7208 and 7220) show that the damage initiation starts with adhesive and corrosive wear mechanisms, which result in a sharp increase in the torque as well as the wear volume on the bearing raceway. As the number of cycles increases, an abrasive mechanism occurs, resulting in a lower slope of the wear curve and a smoothing of the resulting wear depressions. The wear and torque curves were evaluated and classified using an energy-wear approach according to Fouvry.
Keywords
- false brinelling, grease lubrication, oscillating bearing, pitch bearing, wear
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Surfaces, Coatings and Films
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In: Lubricants, Vol. 11, No. 3, 117, 07.03.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Wear Development in Oscillating Rolling Element Bearings
AU - Wandel, Sebastian
AU - Bartschat, Arne
AU - Glodowski, Jakob
AU - Bader, Norbert
AU - Poll, Gerhard
N1 - Funding Information: This document is a result of the research projects “iBAC—Intelligent Blade Bearing Amplitude Control” (grant number: 0324344A) and “HBDV—Highly Loaded Slewing Bearings” (grant number: 0324303A) funded by the Federal Ministry for Economic Affairs and Climate Action (Federal Republic of Germany) and of the project.
PY - 2023/3/7
Y1 - 2023/3/7
N2 - Rotor blade bearings enable rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to frequent oscillation movements with amplitude ratios of (Formula presented.) > 1, especially due to new control concepts such as Individual Pitch Control, which can lead to wear and a reduction in service life. The objective of this paper was to identify the dominant wear mechanisms and their consequences for the operation of oscillating bearings. Oscillating experiments with an increasing number of cycles on the angular contact ball bearings of two different sizes (types 7208 and 7220) show that the damage initiation starts with adhesive and corrosive wear mechanisms, which result in a sharp increase in the torque as well as the wear volume on the bearing raceway. As the number of cycles increases, an abrasive mechanism occurs, resulting in a lower slope of the wear curve and a smoothing of the resulting wear depressions. The wear and torque curves were evaluated and classified using an energy-wear approach according to Fouvry.
AB - Rotor blade bearings enable rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to frequent oscillation movements with amplitude ratios of (Formula presented.) > 1, especially due to new control concepts such as Individual Pitch Control, which can lead to wear and a reduction in service life. The objective of this paper was to identify the dominant wear mechanisms and their consequences for the operation of oscillating bearings. Oscillating experiments with an increasing number of cycles on the angular contact ball bearings of two different sizes (types 7208 and 7220) show that the damage initiation starts with adhesive and corrosive wear mechanisms, which result in a sharp increase in the torque as well as the wear volume on the bearing raceway. As the number of cycles increases, an abrasive mechanism occurs, resulting in a lower slope of the wear curve and a smoothing of the resulting wear depressions. The wear and torque curves were evaluated and classified using an energy-wear approach according to Fouvry.
KW - false brinelling
KW - grease lubrication
KW - oscillating bearing
KW - pitch bearing
KW - wear
UR - http://www.scopus.com/inward/record.url?scp=85152286922&partnerID=8YFLogxK
U2 - 10.3390/lubricants11030117
DO - 10.3390/lubricants11030117
M3 - Article
AN - SCOPUS:85152286922
VL - 11
JO - Lubricants
JF - Lubricants
SN - 2075-4442
IS - 3
M1 - 117
ER -