Schwack, F.; Bader, N.; Leckner, J.; Demaille, C.; Poll, G.: A study of grease lubricants under wind turbine pitch bearing conditions. In: Wear 454-455 (2020), 203335. DOI: https://doi.org/10.1016/j.wear.2020.203335
Zusammenfassung: | |
Pitch bearings in wind turbines are affected by reciprocating motion due to pitch control. The combination of oscillating operation, high loads, and mixed lubrication often leads to wear. Grease lubricants in wind turbine pitch bearings should be designed to avoid such wear. Due to different available grease lubricants, the anti-wear properties are investigated under downscaled wind turbine pitch bearing conditions. The downscaling is accomplished by load simulation for a pitch bearing and analysis of the pitch movements for a 7.5 MW reference turbine. The operational conditions of the four point contact ball bearing with 5 m outer diameter are scaled to angular contact ball bearings of the size 7208. The investigations are concluded with contact model experiments. Six Industrial grease lubricants for wind turbine pitch bearings are tested that follow very different compositions. The investigations reveal, that none of the tested grease lubricants was able to reduce wear for all tested conditions. After 250000 cycles certain conditions lead to severe wear. Therefore, the pitch controller should avoid such conditions if possible. Nevertheless, grease lubricants with low base oil viscosities and high bleeding rates are best on average for the tested conditions. Furthermore, the results of the bearing experiments are comparable to the model experiments. © 2020 | |
Lizenzbestimmungen: | CC BY-NC-ND 4.0 Unported |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2020 |
Die Publikation erscheint in Sammlung(en): | Fakultät für Maschinenbau |
Pos. | Land | Downloads | ||
---|---|---|---|---|
Anzahl | Proz. | |||
1 | Germany | 104 | 48,60% | |
2 | China | 36 | 16,82% | |
3 | United States | 29 | 13,55% | |
4 | Europe | 11 | 5,14% | |
5 | Israel | 6 | 2,80% | |
6 | Tanzania, United Republic of | 2 | 0,93% | |
7 | Sweden | 2 | 0,93% | |
8 | Russian Federation | 2 | 0,93% | |
9 | Ireland | 2 | 0,93% | |
10 | France | 2 | 0,93% | |
andere | 18 | 8,41% |
Hinweis
Zur Erhebung der Downloadstatistiken kommen entsprechend dem „COUNTER Code of Practice for e-Resources“ international anerkannte Regeln und Normen zur Anwendung. COUNTER ist eine internationale Non-Profit-Organisation, in der Bibliotheksverbände, Datenbankanbieter und Verlage gemeinsam an Standards zur Erhebung, Speicherung und Verarbeitung von Nutzungsdaten elektronischer Ressourcen arbeiten, welche so Objektivität und Vergleichbarkeit gewährleisten sollen. Es werden hierbei ausschließlich Zugriffe auf die entsprechenden Volltexte ausgewertet, keine Aufrufe der Website an sich.