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Dissertations / Theses on the topic 'Turbine bearings'

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Published: 4 June 2021

Last updated: 3 February 2022

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1

Smith, Warren Robert. "High velocity gas journal bearings." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317910.

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2

Naumann, Jack. "Acoustic emission monitoring of wind turbine bearings." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12397/.

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Climate change, national and international targets and a possible impending fuel scarcity is driving the need for a clean, cheap and sustainable energy source. Although onshore wind is currently the most economically viable source of renewable energy, high failure rates often occurring many years prior to their design life, are increasing the cost through additional maintenance and downtime. The gearbox, and in particular the bearings within the gearbox are the components responsible for the largest proportion of downtime. Field studies have shown damage to the inner race of the planetary supp

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3

Kachhia, Bhaveshkumar Mahendrabhai. "Design and tribological issues in wind turbine bearings." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0076.

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Grandes bague de roulement utilisés dans éolienne sont l'un des éléments de transmission de charge importantes de ces machines tournantes. Ces roulements fonctionnent grâce à des cycles de charge et de la fréquence et de l'expérience des défis complexes tribologiques sévères. Le coût de remplacement de ces paliers est très élevé et conduit aussi à quantité importante de temps d'arrêt. Il est donc important de comprendre certains des principaux problèmes de conception et tribologiques de ces roulements. Quatre points type de roulement de l'anneau de contact de rotation a été considéré comme une

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4

Bruce, Thomas. "Analysis of the premature failure of wind turbine gearbox bearings." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/13903/.

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Wind turbine gearbox bearings are the component that leads to the most downtime of operating wind turbines due to their high failure rates. Failures occur within 10 % of bearing design life, despite the fact that they are designed to the same bearing standards that satisfactorily predict bearing lifetime in many other industrial applications. No theory has yet been widely accepted to explain the reasons for this premature failure, despite intensive research effort and many theories have been suggested both from industrial and academic researchers alike. The most widely accepted theory at the c

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5

Jain, Sharad. "Skidding and fault detection in the bearings of wind-turbine gearboxes." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608104.

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6

Dhakal, Nayan. "Tribology of newly developed EAL versus water in hydropower turbine bearings." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76864.

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The increasing demand for more readily bio-degradable, renewable and non-toxic environmentally adaptive lubricants with a lower degree of bioaccumulation has escalated the investigation of water-based lubricants as the potential alternatives for conventional mineral-based oils. Water is an excellent environmentally adapted lubricant; however, it is a low viscous fluid and holds downsides of having corrosive nature and extremely low pressure-viscosity coefficient leading to insufficient load-carrying capacity. These shortcomings make pure water a poor choice for operations involving high load a

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7

Al-Tameemi, Hamza Abdulrasool Hussain. "Effect of surface traction and non-metallic inclusions on the premature failure of wind turbine gearbox bearings." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/19813/.

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8

Janata, Petr. "Parní turbína pro spalovnu odpadů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417528.

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The master thesis deals with the design of a condensing steam turbine for a waste incineration plant with regulated take for a heat exchanger, which has a heat output of 15 MWt and a temperature gradient of 60/90 °C. In the thesis, a thermal scheme was first designed, which was based on the required design parameters. The maximum mass flow of steam into the turbine is 38 t/h. The pressure and temperature of the admission steam is 37 bar and 440 °C. The degassing temperature is 105 °C and the cooling water temperature at the condenser inlet is 20 °C. The following is the design and thermodynami

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9

Forsström, William. "Utredning av frekvensregleringens påverkan på mekanisk utrustning i en kaplanturbin." Thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-247261.

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As a consequence of increasing wind power installations in the Nordic grid the last years, the need for regulating power has become larger. In the Nordic grid, regulating power is mainly provided by hydro power. One part of the regulating power is called frequency control, which ensures that the grid frequency is stable and close to 50 Hz. However, setting the turbine into frequency controlled operation may cause stress and wear of the components in the mechanical control system. Frequency controlling implies large and frequent servo forces and longer travelling distance of the sliding bearing

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10

Wei, Min, and 魏敏. "Aspects of dental air turbine handpiece bearing failure." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45452040.

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11

Sedláček, Jiří. "Návrh vírových turbin pro zpracování zbytkové hydraulické energie vodního díla Chocerady." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231713.

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This diploma thesis deals with hydraulic potential energy of water flows. It also deals with Swirlturbine which is used for water flows with low fall. The optimal design of Swirlturbine at hydraulic structure Chocerady was the main part of this diploma thesis. Part of the diploma thesis is proposal of power plant, solution inlet and inlet swirls, next vent valve and the issue of the draft tube. The thesis includes the proposal of belt gear and strenght analysis of shaft and bearings.

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12

Farrall, Mark. "Numerical modelling of two-phase flow in a simplified bearing chamber." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367991.

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13

Brito, Junior Geraldo Carvalho. "Comportamento dinamico de mancais de guia de hidrogeradores de grande porte." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264600.

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Orientador: Hans Ingo Weber<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-07-22T19:15:46Z (GMT). No. of bitstreams: 1 BritoJunior_GeraldoCarvalho_M.pdf: 39029128 bytes, checksum: 98700968edab665ec7a129400e43c840 (MD5) Previous issue date: 1996<br>Resumo: Este trabalho é dividido em duas partes, uma teórica e outra experimental. Na primeira parte é apresentado um procedimento, estabelecido com base em um estudo analítico da Equação de Reynolds, para determinar os coeficientes de rigidez e de amortecimento do

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14

Lin, Chuang-Chia 1968. "Development of a microfabricated turbine-driven air bearing rig." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9393.

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15

Leung, P. S. "An investigation of the dynamic behaviour of floating ring bearing systems and their application to turbogenerators." Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384577.

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16

Daniel, Gregory Bregion 1984. "Desenvolvimento de um modelo termohidrodinâmico para análise em mancais segmentados." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263817.

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Orientador: Katia Lucchesi Cavalca<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-20T21:45:12Z (GMT). No. of bitstreams: 1 Daniel_GregoryBregion_D.pdf: 5439822 bytes, checksum: 616b0f86a01472d86d7a1b9dc7943ea0 (MD5) Previous issue date: 2012<br>Resumo: Este trabalho tem por objetivo analisar o comportamento termohidrodinâmico de mancais hidrodinâmicos segmentados e avaliar a influência da temperatura nas características dinâmicas (coeficiente equivalente de rigidez e de amortecimento) desses mancais. Por esse m

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17

Nimir, Yassin Lutfi. "An air bearing system for high speed turbomachinery." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385143.

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18

Chen, Wei. "Development of a Control and Monitoring Platform Based on Fuzzy Logic for Wind Turbine Gearboxes." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23584.

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It is preferable that control and bearing condition monitoring are integrated, as the condition of the system should influence control actions. As wind turbines mainly work in remote areas, it becomes necessary to develop a wireless platform for the control system. A fuzzy system with self-tuning mechanism was developed. The input speed error and speed change were selected to control the shaft speed, while the kurtosis and peak-to-peak values were used as another set of inputs to monitor the bearing conditions. To enhance effectiveness, wait-and-see (WAS) logic was used as the pre-processing s

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19

Stammler, Matthias [Verfasser]. "Endurance test strategies for pitch bearings of wind turbines / Matthias Stammler." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2020. http://d-nb.info/1219652172/34.

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20

Schneider, Abraham 1981. "Dynamic modeling of high-speed impulse turbine with elastomeric bearing supports." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89911.

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21

Denis, Sébastien. "Analyse dynamique d'une ligne d'arbre verticale supportée par une butée à patins oscillants." Thesis, Poitiers, 2014. http://www.theses.fr/2014POIT2335/document.

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Les problèmes vibratoires sont l'une des principales causes des maintenances effectuées sur les turbines de barrages hydroélectrique en France. Dans cette thèse CIFRE, subventionnée par la Division Technique Générale d’Électricité de France à Grenoble, nous voulons étudier numériquement les phénomènes physiques en jeu.Pour cela, chaque partie composant ce type de machine tournante est modélisée : la ligne d'arbre, les accouplements rigides, les paliers hydrodynamiques, la butée hydrodynamique à patins oscillants, les étanchéités et les efforts électromagnétiques. Celui du rotor est basé sur un

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22

Bredesen, Kristian Opsahl. "Design of Nacelle and Yaw Bearing for NOWITECH 10 MW Reference Turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produktutvikling og materialer, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24546.

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NOWITECH (Norwegian Research Centre for Offshore Technology) are developing a 10 MW offshore reference wind turbine to encourage increased production of renewable energy. This thesis present a mechanical design and dimensioning of a transition piece between the yaw bearing (part of the nacelle) and the tower in this reference turbine. A fatigue analysis to verify the lifetime of 20 years for the main shaft, bed plate and transition piece has also been performed.The final design has shape like a cone, which distributes the loads from the yaw bearing to the whole section of each tower leg. An ex

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23

Howard, Thomas Peter. "Development of a novel bearing concept for improved wind turbine gearbox reliability." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/11631/.

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The wind industry has experienced rapid growth in recent years as a result of ever increasing concerns over fossil fuel power generation and the associated impact this has upon climate change. Wind turbine technology has however displayed relatively poor reliability from the outset, largely due to the highly variable nature of the wind, which subsequently places system components under extremely harsh loading conditions. Such reliability issues are becoming increasingly problematic for the wind turbine operator, as wind farms – and indeed the turbines themselves – continue to be up-scaled thus

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24

Yang, Xu Yang. "Performance and Bearing Behavior of Foundations for Offshore Wind Turbines." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1525707653847882.

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25

Gomez, Chirinos José Luis. "Angle modeling of a rotating machine. Application to wind turbine surveillance." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI067/document.

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Ce travail de recherche s'inscrit dans le cadre de la surveillance des machines tournantes en régime non stationnaire et plus particulièrement la détection des défauts de roulement. Il se focalise sur la modélisation et l'analyse des variations de la vitesse de rotation instantanée. Les modèles numériques développés s'appuient sur une approche originale dite " angulaire " qui introduit explicitement les degrés de rotation libres de la machine et permet de s'affranchir de condition de fonctionnement en régime stationnaire. Un modèle de roulement à billes à gorge profonde a été développé couplan

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26

Whittle, Matthew. "Wind turbine generator reliability : an exploration of the root causes of generator bearing failures." Thesis, Durham University, 2013. http://etheses.dur.ac.uk/9422/.

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Increasing the availability of multi-megawatt wind turbines (WT) is necessary if the cost of energy generated by wind is to be reduced. Reliability surveys have shown that WT generator bearings have a relatively high failure rate, with failures happening too early to be due to classical rolling contact fatigue. It has been the purpose of the present work to demonstrate the value of models which may help to explain some of the failure modes of wind turbine generators (and their root causes). The work has considered two potential root causes of wind turbine generator failure. Firstly, gearbox-ge

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27

Vorwaller, Mark Ryan. "The Effect of Magnetic Bearing on the Vibration and Friction of a Wind Turbine." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5549.

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Demands for sustainable energy have resulted in increased interest in wind turbines. Thus, despite widespread economic difficulties, global installed wind power increased by over 20% in 2011 alone. Recently, magnetic bearing technology has been proposed to improve wind turbine performance by mitigating vibration and reducing frictional losses. While magnetic bearing has been shown to reduce friction in other applications, little data has been presented to establish its effect on vibration and friction in wind turbines. Accordingly, this study provides a functional method for experimentally

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28

Karikari-Boateng, Kwaku Ampea. "Accelerated testing of tidal turbine main bearing in a full scale nacelle test rig." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/31210.

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Tidal Energy is one of the growing renewable energy technologies that is aimed at tackling global energy challenges. The Horizontal Axis Tidal Turbine (HATT) is an in-stream Tidal Energy Converter (TEC) which extracts kinetic energy from tidal flows. These tidal turbines face many reliability challenges due to their complexity, harsh operating environment and low accessibility. One of the component contributing significantly to the reliability of a TEC is the bearing supporting the rotating shaft within the nacelle. The reliability assessment of this component is essential during the design pr

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29

Drápela, Jakub. "Parní kondenzační turbína s jedním regulovaným odběrem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254308.

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This diploma thesis describes a design of condensing steam turbine out of entered data of vapor parameters. There is selected a reaction blading type according to a conception of the company PBS Energo PLC. The turbine has one controlled extraction and three uncontrolled ones. The work also includes a proposal of thermal scheme, bearing and gearbox assignment. Furthermore there is also made a draft design of longitudinal section turbine

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30

Dyson, John Edwin. "Aspects of the behaviour and design of dental high speed ball bearing air turbine handpieces." Thesis, University of London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324587.

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31

Hehir, Ryan Thomas. "A CFD Investigation of the Two Phase Flow Regimes Inside the Bearing Chamber and De-aerator of a Jet Engine." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73386.

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In a jet engine air and oil are mixed during removal from the bearing chamber. Before the oil can be recycled back into the system it must be separated from the air. This is accomplished through use of a de-aerator and breather. The oil air mixture enters the de-aerator first. The de-aerator is a vertical cylinder in which the air and oil enter from the top of the system. Gravity then pulls the oil down as it circulates along the outer wall of the de-aerator. The air is forced out through a top hole and sent to the breather where any oil droplets which remain are furthered separated. A

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32

Červenec, Adam. "Parní turbína pro pohon kompresoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401526.

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The purpose of the diploma thesis is the design of condensing steam turbine for driving a compressor with mechanical power of 14,5 MW and operating speed 6800 rotations per minute on the compressor clutch. The main part is the thermodynamic calculation of the blade canal, which is verified with strength calculation to meet the requirements of the standart API 612. The next part is a basic design of gland sealing system, including a piston which is leveling the axial force with reusage of steam back to the blade canal. This thesis includes a calculation of axial and radial forces including the

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33

Mostafa, Kaswar. "Direct drive wind turbines : the effect of unbalanced magnetic pull on permanent magnet generators and bearing arrangements." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31360.

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Wind energy has been the fastest emerging renewable energy source over the last decade. The overriding provisos to minimise greenhouse emissions and increasing concerns regarding energy security have been the major inducements for many countries to make a resolute transition to new and non-conventional power sources. Direct-drive systems for wind turbines are potentially a more reliable alternative to gearbox driven systems. Gearboxes are liable to significant accumulated fatigue torque loading with relatively high maintenance costs. It is with this in mind that the primary focus of this resea

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34

Jonuschies, Ingo, and Klaus Brökel. "Ansatz für die Modellierung und Simulation von Hybridgleitlagern für Wellen mit großen Durchmessern und geringen Drehzahlen am Beispiel einer Windkraftanlage." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-228246.

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Motivation "Am stetig steigenden Anteil der erneuerbaren Energien, der auf der einen Seite durch die ehrgeizigen Ziele der Politik forciert und auf der anderen Seite durch wirtschaftliche Interessen beflügelt wird, stellt die Windenergie den größten und aussichtsreichsten Bestandteil dar (BMU 2012). Setzt sich der gegenwärtige Trend fort, so ist in den nächsten Jahren mit Multimegawattanlagen im mehrstelligen Megawattbereich zu rechnen."

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35

Zhang, Silun. "Analyse de l'effet Morton dans les turbines à vapeur." Thesis, Poitiers, 2019. http://www.theses.fr/2019POIT2260.

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Dans le domaine de machine tournante (turbines à vapeurs, turbocompresseurs et autres turbomachines), l’effet Morton désigne la création d’une source d’excitation synchrone due à la déformation thermique du rotor dans les paliers hydrodynamiques. Par abus de langage, cette source phase des vibrations synchrones du rotor évoluent progressivement dans le temps. Dans la plupart des cas, l’effet Morton reste stable et les influences du balourd thermique sur les vibrations ne sont pas nuisibles au fonctionnement de la machine. Cependant, si les conditions sont favorables, le comportement dynamique

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36

Ben, Hassine Seif. "Multipath and receiver models for assessing the VOR bearing error : application to wind farms." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30047.

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L'implémentation des éoliennes à proximité des systèmes VOR (VHF Omnidirectional Range) est une préoccupation importante pour l'aviation civile. Les éoliennes constituent une source de multitrajets qui peuvent produire des erreurs sur l'information d'azimut estimée par le récepteur d'avion. Dans la littérature, l'erreur VOR est calculée à partir de paramètres multitrajets en utilisant l'expression analytique proposée par Odunaiya et Quinet. Dans cette thèse de doctorat, nous avons développé un modèle d'un récepteur IQ numérique qui peut reproduire la réponse d'un récepteur VOR lorsque les mult

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37

Jonuschies, Ingo, and Klaus Brökel. "Ansatz für die Modellierung und Simulation von Hybridgleitlagern für Wellen mit großen Durchmessern und geringen Drehzahlen am Beispiel einer Windkraftanlage." TUDpress - Verlag der Wissenschaften GmbH, 2012. https://tud.qucosa.de/id/qucosa%3A30503.

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Motivation "Am stetig steigenden Anteil der erneuerbaren Energien, der auf der einen Seite durch die ehrgeizigen Ziele der Politik forciert und auf der anderen Seite durch wirtschaftliche Interessen beflügelt wird, stellt die Windenergie den größten und aussichtsreichsten Bestandteil dar (BMU 2012). Setzt sich der gegenwärtige Trend fort, so ist in den nächsten Jahren mit Multimegawattanlagen im mehrstelligen Megawattbereich zu rechnen."

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38

Kosar, Jakub. "Konstrukční řešení reverzní vírové turbiny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416611.

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The thesis deals with the construction design of reversible swirl turbine used in a tidal range power plant for bidirectional operation. The theoretical part provides an overview of state-of-the-art technologies in the usage of tidal energy, mostly by means of tidal range and stream tidal power plants. It also analyses respective designs of tidal turbines and their advantages and disadvantages. The practical part of the thesis demonstrates individual steps applied when examining loading forces and also shows the design method and strength inspection procedure of the turbine and its parts, espe

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39

Olagunju, Moses Oladipo. "A study of efficient recovery of liquid from fine air-liquid mists of the form generated in gas turbine bearing chambers using rotating porous disc." Thesis, University of East London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265060.

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40

Conti, Claudio. "Small-scale physical modelling of piled foundations for offshore wind turbines application." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Nowadays, finding alternative energy sources is becoming more and more important. Europe is particularly focusing on wind energy and in offshore wind energy especially. An issue concerning offshore wind energy which is gaining more and more attention is the noise emissions due to impact driven pile foundation. The noise caused by the installation process has been judged as “potentially dangerous for marine fauna” from the German Authorities. This research thesis is part of a project which examines a viable alternative installation method for the displacement of pile foundations for offshore w

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Novák, Pavel. "Konstrukční řešení modelu průtočné říční elektrárny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228356.

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This thesis deals with designing a small hydraulic power plant, where a swirl turbine is conected to a unique synchronous working, which will offer a reliable and easy installation of the hydraulic power plant. As a result a wider potential of energy could be produced from renewable resources. The use of a narrow rottor as a holder of the permanent magnets is the biggest difficulties of this design.

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Singh, Harpal. "An Investigation of Material Properties and Tribological Performance of Magnetron Sputtered Thin Film Coatings." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1449850005.

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43

Liao, Jie-Lu, and 廖界儒. "Designing and Implementing Magnetic Bearings for Wind Turbine with Permanent Magnet Generators." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/14806772969560162934.

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碩士<br>國立聯合大學<br>電機工程學系碩士班<br>99<br>The main subject of the thesis is to design a passive magnetic bearing which performs on a wind turbine. In the contents, the first part lies in study¬ing the permanent magnet synchronous generator and magnetic bearing and then designing the magnetic bearing and the structure of wind turbine. Apply¬ing the electromagnetic simulation software to process the post-analyzed repeated correction and making each component successfully are the final realizations. It is successful to use the passive magnetic bearing to load the objects and generate electric power; mor

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44

Fernandes, Carlos Miguel da Costa Gomes. "Power loss in rolling bearings and gears lubricated with wind turbine gear oils." Tese, 2015. https://repositorio-aberto.up.pt/handle/10216/78594.

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Fernandes, Carlos Miguel da Costa Gomes. "Power loss in rolling bearings and gears lubricated with wind turbine gear oils." Doctoral thesis, 2015. https://repositorio-aberto.up.pt/handle/10216/78594.

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王品鈞. "Thermal Imaging Diagnosis of Air Turbine Dental Handpiece Rotor Bearings by Using Convolutional Neural Network." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/88x6xu.

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碩士<br>國立彰化師範大學<br>機電工程學系<br>107<br>In recent years, artificial intelligence(AI) has been widely used in life. This study took the computing core by the deep learning of convolutional neural network. The Convolutional Neural Network (CNN) has often been used for image recognition and image classification. This study used a non-invasive infrared thermal imaging camera for the diagnosis of dental handpiece rotors. Areas in a thermal image can be considered as specific conditions. It simplifies the detection of complex physical knowledge. The thermal image was trained by CNN. Thirty seconds and on

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Amaro, Pedro Miguel Pinto. "Friction torque in thrust ball and roller bearings lubricated with "wind turbine gear oils" at constant temperature." Dissertação, 2012. http://hdl.handle.net/10216/68227.

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Amaro, Pedro Miguel Pinto. "Friction torque in thrust ball and roller bearings lubricated with "wind turbine gear oils" at constant temperature." Master's thesis, 2012. http://hdl.handle.net/10216/68227.

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Qiu, Qi-Min, and 邱祺民. "Bearings fault signal detection used in wind turbines." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/bxtmbf.

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碩士<br>國立中央大學<br>機械工程學系<br>105<br>The goal of the research was to diagnose the bearing faults in rotary machines though examining their dynamic responses or vibration signals. A bearing has specific defect vibration frequencies which can be calculated from bearing design data. Short-time-Fourier transform, ensemble empirical mode decomposition (EEMD) and fast kurtogram were signal processing methods for detecting bearing faults. These signal processing methods were used to analyze the dynamic responses from a rotor system with a damaged bearing and were compared to each other. Then, the methods

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Chao, Chia-Hsing, and 趙家興. "Micro-Turbine Rotor-Bearing System Analysis Using FEM." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/16025488003379247690.

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碩士<br>國立清華大學<br>動力機械工程學系<br>93<br>The development of modern turbine system is focused on the high speed rotor-bearing system, including dental hand-piece, portable micro-turbine generator, aviation turbine engine…etc. But, there are few papers for this respect. The paper, combined forefathers’ analysis experience, uses finite element method (FEM) to analyze and study the ball-bearing and the air-bearing dental hand-piece turbine systems. The object of the investigation is to develop a design and analysis method for the micro-turbine rotor-bearing system using finite element method (FEM), a

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