| Description |
1 online resource ([27] pages) : color illustrations |
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text txt rdacontent |
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computer c rdamedia |
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online resource cr rdacarrier |
| Series |
NREL/PR ; 5000-73428 |
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NREL/PR ; 5000-73428.
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| Note |
"4th Conference for Wind Power Drives 2019, Aachen, March 13, 2019." |
| Funding |
U.S. Department of Energy (DOE) DE-AC36-08GO28308 |
| Note |
Online resource; title from PDF title screen (NREL, viewed on August 12, 2019). |
| Summary |
Failures in gearbox bearings have been a primary source of reliability issues for wind turbine drivetrains, leading to costly downtime and unplanned maintenance. The most common failure mode is attributed to so-called white-etching cracks (WECs). This mode of failure can occur at 5%-20% of the predicted design life and has been observed in many other industries, bearing locations, bearing types, bearing parts, and steel types. The main drivers for the creation of WECs in steel specimens have been identified and verified by material testing. In a full-scale wind turbine gearbox, however, the conditions leading to WECs, the process by which this failure culminates, and the reasons for their apparent prevalence are all still highly debated. In a collaborative project, Flender Corporation, SKF and the National Renewable Energy Laboratory have instrumented a commercial drivetrain, installed it in a wind turbine, and operated the turbine for over a year. In this report, these measurements are used to validate two different modelling approaches for bearing sliding, one analytical dynamic model and one multi-body model. Once validated, these models can then be used to evaluate the roller slip losses or cumulative frictional energy that are each considered as potential driving factors for wind turbine gearbox bearing failures by WEC. |
| Subject |
Wind turbines -- United States.
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Bearings (Machinery) -- United States.
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Éoliennes -- États-Unis.
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Paliers et coussinets -- États-Unis.
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Bearings (Machinery) (OCoLC)fst00829285
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Wind turbines. (OCoLC)fst01175728
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United States. (OCoLC)fst01204155 https://id.oclc.org/worldcat/entity/E39PBJtxgQXMWqmjMjjwXRHgrq
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| Indexed Term |
drivetrain reliability |
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gearbox |
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reliability |
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roller sliding |
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shaft bearings |
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wind turbine |
| Added Author |
National Renewable Energy Laboratory (U.S.), issuing body.
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United States. Department of Energy.
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| Standard No. |
1512686 OSTI ID |
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0000-0001-7724-3885 |
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0000-0002-6413-947X |
| Gpo Item No. |
0430-P-09 (online) |
| Sudoc No. |
E 9.22:NREL/PR-5000-73428 |
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