Projekt

Wind turbine bearings

Udbyder

Vejleder

Sted

København og omegn

This project proposal is focused on investigating subsurface cracks in wind turbine bearings called White Etching Cracks (WEC), which is probably the single most critical and least understood failure mode experienced in wind turbines. This project can be carried out in cooperation with a major wind turbine manufacturer, depending on the content.

Background

In order for wind power to compete without subsidies against other cheaper energy sources such as coal, a higher reliability is needed for lowering downtime and maintenance expenses. Bearings are one of the critical components for the wind turbine drivetrain, being present at the main shaft, gearbox and generator. Although bearings are designed for a 20 year life span, failure after 1 or 2 years from WEC is not uncommon. Maintenance and repair of bearing related failures are very costly and some turbine manufacturers consider WEC to be the most expensive technical issue for wind turbines.

Content

This project focuses on comparing several types of bearing materials acquired from different bearing manufacturers, as well as new experimental alloys. The bearings will be tested using accelerated WEC bearing tests rigs to find the best suitable material and failure analysis will be performed for investigating the damage mechanism for each material. Light optical microscopy will be used for identifying crack networks and Scanning Electron Microscopy (SEM) will be used for high resolution characterization of WEC and chemical analysis of inclusions. The project could be expanded to include state-of-the-art high resolution 3D X-ray CT scanning for mapping crack networks in three dimensions.

The project should help clarify how to avoid White Etch Cracks formation in bearings, which has arguably been the all-time single most expensive failure mode out of all wind turbine components. More specific goals should be defined between the project student and the supervisor, depending on which areas of research the student finds interesting.

Forudsætninger

Some background in materials or mechanical engineering.

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Kontakt

Virksomhed/organisation

DTU Vindenergi

Navn

Hilmar Kjartansson Danielsen

Stilling

Seniorforsker

Mail

hkda@dtu.dk

Vejleder-info

Kandidatuddannelsen i Vindenergi

Vejleder

Hilmar Kjartansson Danielsen

ECTS-point

15 - 45

Type

Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

Find os her

Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

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