Development and commissioning of test device for bearings used in wind turbine gearbox high speed shaft
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Wind energy market pressure towards lower levelized cost of energy has led to size optimizations for wind turbine gearboxes which are one of the most important turbine subcomponents in converting the slow rotor speed to high speeds suitable for the electricity grid connected generator. Gearbox size optimization decreases material costs but in turn introduces challenges for example for gearbox lubrication solutions. The so called high speed shaft (HSS) and its bearings are often the most critical components for lubrication. Because the HSS is connected to the generator its rotational speed is the highest and therefore it usually also experiences the highest temperatures. Based on these considerations a component level test device for high speed shaft bearings had been designed. Process variable measurement system, automation control logic and simulation model were developed for the test device in the practical part of this thesis. Practical work also included the commissioning of test device and execution of reference tests. Main goal of the measurements was to study the lubrication oil's temperature change from bearing inlet to outlet. It was observed that previously used estimation of increase of 10 °C is applicable only for part of the tested bearings. Analysis of test results was limited by the notion that the measured torque losses for the test device were significantly higher than expected based on theoretical values. However, the practical implementation of measurement and control system was deemed successful. Increased torque losses were hypothesized to be due to load independent oil drag losses and therefore future test with HSS bearing tester should focus on decreasing the drag losses closer to a level corresponding to theory. ...
MetadataShow full item record
- Pro gradu -tutkielmat 
Showing items with similar title or keywords.
Mäkelä, Tiina; Fenyvesi, Kristof; Mäki-Kuutti, Matias (J-STEM, 2020)The need for effective and attractive learning environments (LEs) for science, technology, engineering, and mathematics (STEM) has been internationally recognized. Additionally, the connection between STEM learning and ...
Alviola, Teemu (2013)Tämä pro gradu -työ on sekundääritutkimuksena tehty kirjallisuuskatsaus energiatehokkuuden tarkastelusta langattomissa verkoissa. Työssä tarkastellaan erilaisia mobiiliverkkojen energiansäästömahdollisuuksia. ...
International Contributions to Diversity in Music Education Research: Proceedings of the 28th International Seminar of the ISME Research Commission González-Moreno, Patricia A. (2021)Undoubtedly, 2020 has been a year that many of us around the world will never forget. The pandemic caused by COVID-19 imposed challenges at all levels of our personal and professional lives. Under these circumstances, the ...
Virtanen, Ville (2019)Tässä työssä esitellään Jyväskylän yliopiston kiihdytinlaboratoriossa sijaitsevaan IGISOL-laitokseen rakennetun moniheijastavan lentoaika-massaerottajan (engl. Multi- Reflection Time-of-Flight mass separator, MR-ToF-ms) ...
Commissioned Book Review : Aliaksei Kazharski, Eurasian Integration and the Russian World: Regionalism as an Identitary Enterprise Romashko, Tatiana (Sage Publications, 2019)