Log in

Relevant bibliographies by topics / Hydrodynamic journal bearings / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Hydrodynamic journal bearings.

Dissertations / Theses on the topic 'Hydrodynamic journal bearings'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 48 dissertations / theses for your research on the topic 'Hydrodynamic journal bearings.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Fitzgerald, Michael Kevin. "Heat transfer effects in hydrodynamic journal bearings." Thesis, University of Sheffield, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722175.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Wirsing, Thomas. "Effect of Axial Oscillation on Performance of Hydrodynamic Journal Bearings." Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1210683430.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Philip, Croné. "Thermo-Elasto-Hydrodynamic lubrication modeling of Tilting Pad Journal Bearings." Licentiate thesis, Luleå tekniska universitet, Maskinelement, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71105.

Full text

Abstract:

The journal bearing is a critical machine element typically used to support rotating motion in high speed machinery. Through the generation of a hydrodynamic pressure in its thin lubricant film,which is usually in the order of 10-100μmthick depending on the diameter of the journal itself, the bearing is able to withstand large loads, both statically and dynamically, while having a very low rate of wear. It is of course essential that these components provide for a safe operation with as little wear and frictional losses as possible and it is therefore of great interest to develop simulation mo

APA, Harvard, Vancouver, ISO, and other styles

4

Cheung, J. O. "Transient response to flexible rotor-bearing systems subjected to combined unbalance and ground excitations." Thesis, Cranfield University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233345.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Jakeman, R. W. "Analysis of dynamically loaded hydrodynamic journal bearings with particular reference to misaligned marine sterntube bearings." Thesis, Nottingham Trent University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

McIvor, James David Colin. "The analysis of dynamically loaded flexible journal bearings using higher-order finite elements." Thesis, King's College London (University of London), 1988. https://kclpure.kcl.ac.uk/portal/en/theses/the-analysis-of-dynamically-loaded-flexible-journal-bearings-using-higherorder-finite-elements(8cb1e4bc-41a7-4a66-bf72-5b5e93668509).html.

Full text

Abstract:

An efficient and robust predictive technique has been developed for the analysis of dynamically loaded, flexible journal bearings using the finite element method. The work is in two parts. In the first part a fast predictive technique is developed for the analysis of dynamically loaded, rigid journal bearings. The finite element formulation of Reynolds equation is presented using both 3-node triangular and 8-node isoparamteric elements to model the lubricant film. The latter are shown to approximate the problem more closely using fewer nodal points and hence requiring fewer equations. The Gaus

APA, Harvard, Vancouver, ISO, and other styles

7

Swanson, Erik Evan. "Design and Evaluation of an Automated Experimental Test Rig for Determination of the Dynamic Characteristics of Fluid-Film Bearings." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30727.

Full text

Abstract:

Hydrodynamic journal bearings are applied in a wide range of both old and new, advanced rotating machinery designs. To maintain existing machinery, as well as to design new, state of the art machines, validated analytical models for these bearings are needed. This work documents the development and evaluation of an automated test rig for the evaluation of hydrodynamic journal bearings to provide some of the needed experimental data. This work describes the test rig in detail, including the results of experimental characterization of many of the test rig subsystems. Experimental data for a t

APA, Harvard, Vancouver, ISO, and other styles

8

Garcia, Mathieu. "Refrigerant-lubricated gas foil bearings : A thermo-hydrodynamic study (application to rigid bearings)." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0133/document.

Full text

Abstract:

Des études internes à Liebherr-Aerospace France, concernant la conception de nouveaux compresseurs lubrifiés par gaz réfrigérant, ont montré que dans des conditions de fonctionnement spécifiques, un mélange de vapeur et de liquide apparaît au sein du compresseur, au lieu d'une phase vapeur seule. De ce fait, le comportement des paliers à feuilles lubrifiés au gaz réfrigérant est étudié, y compris la possibilité d'un écoulement diphasique du lubrifiant. L'étude porte sur le comportement du lubrifiant uniquement, dans des conditions de fonctionnement qui sont celles des paliers à feuilles. L'app

APA, Harvard, Vancouver, ISO, and other styles

9

Zieliński, Piotr. "The influence of surface roughness and solid contaminants on the performance of hydrodynamic journal bearings." Thesis, Queensland University of Technology, 1997.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

10

Briggs, Maxwell H. "High Pressure Performance of Foil Journal Bearings in Various Gases." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1344447241.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Baytekin, Hüseyin Taner [Verfasser]. "Effects of Surface Roughness on the Orbit of Herringbone Grooved Hydrodynamic Journal Bearings / Hüseyin Taner Baytekin." Aachen : Shaker, 2011. http://d-nb.info/1071529455/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Sharma, Subhash Chandra. "Wear reducing additives for lubricants containing solid contaminants." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/20661/1/Subhash_Sharma_Thesis.pdf.

Full text

Abstract:

Machines operating in dusty environments, such as mining and civil works, are prone to premature failure, leading to production losses. To address this problem, this research project examines the interaction between solid contaminants and the bearing micro-geometry, in lubricated surface contacts. In particular, it seeks to identify anti-wear additives that are effective in reducing wear under abrasive conditions, making machine elements more dirt tolerant. In general, the influence of antiwear additive is so small that it is difficult to isolate it. Manufactures often make claims about thei

APA, Harvard, Vancouver, ISO, and other styles

13

Sharma, Subhash Chandra. "Wear reducing additives for lubricants containing solid contaminants." Queensland University of Technology, 2008. http://eprints.qut.edu.au/20661/.

Full text

Abstract:

Machines operating in dusty environments, such as mining and civil works, are prone to premature failure, leading to production losses. To address this problem, this research project examines the interaction between solid contaminants and the bearing micro-geometry, in lubricated surface contacts. In particular, it seeks to identify anti-wear additives that are effective in reducing wear under abrasive conditions, making machine elements more dirt tolerant. In general, the influence of antiwear additive is so small that it is difficult to isolate it. Manufactures often make claims about thei

APA, Harvard, Vancouver, ISO, and other styles

14

Lijesh, K. P. "Design and development of magnetic-hydrodynamic hybrid journal bearing." Thesis, IIT Delhi, 2015. http://eprint.iitd.ac.in:80//handle/2074/8180.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

moles, nathaniel caleb. "Actively Controllable Hydrodynamic Journal Bearing Design Using Magnetorheological Fluids." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1444899327.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Beach, John Stephen. "Lubricant supply for synchronously loaded journal bearings." Thesis, Queensland University of Technology, 1998. https://eprints.qut.edu.au/36049/1/36049_Beach_1998.pdf.

Full text

Abstract:

The study of hydrodynamic bearings is a primary area of tribological research. Numerical and experimental investigations into the generation of pressurised oil films and into the location of the journal centre are plentiful. However, comparatively little research on the passage of oil into these oil films has been performed. Synchronously loaded journal bearings are so named because the load rotates in synchronism with the rotating bearing or journal. It has been assumed that the load carrying capacity of the synchronously loaded journal bearing would be identical to that required in t

APA, Harvard, Vancouver, ISO, and other styles

17

Gralde, Marcus, and Tómas Rúnar Sölvason. "Realisation and evaluation of a start-stop journal bearing test-rig." Thesis, KTH, Maskinkonstruktion (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156713.

Full text

Abstract:

While there has been substantial body of work in the field of journal bearing research, much of it is today theoretical or simulated due to today’s computing power. Scania produces experimental data from motor testing, but these are expensive and time consuming. Furthermore there is a difficulty in keeping a sufficiently controlled environment, which at times makes it hard to draw conclusions from testing results. They therefore wish to develop a test-rig which can evaluate friction and wear in journal bearings. This thesis is a continuation of a project in the course Advanced Machine Design g

APA, Harvard, Vancouver, ISO, and other styles

18

Maršálek, Ondřej. "Advanced Methods for the Solution of Journal Bearing Dynamics." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-234268.

Full text

Abstract:

Náplní této disertační práce je popis komplexní a obecně použitelné strategie výpočetního modelování chování kluzných ložisek, pracujících v režimu smíšeného mazání a uvažujících reálné struktury drsných povrchů obou členů kluzných ložisek – ložiskových pánví a ložiskových čepů. V práci jsou uvedeny a detailně popsány způsoby získání charakteristických popisných dat těchto drsných povrchů a její nedílnou součástí je i popis numerických algoritmů, sloužících k následnému zpracování těchto dat. Dále jsou zde rozebrány implementované výpočetní přístupy k modelování kontaktního tlaku. Ovlivnění hy

APA, Harvard, Vancouver, ISO, and other styles

19

Vincenc, Jan. "Laboratorní simulátor pro studium radiálních kluzných ložisek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319274.

Full text

Abstract:

The master’s thesis deals with a design of a radial journal bearing simulator, which is ready to implement a transparent sapphire journal bearing to an optical observation of the oil film. The first part of this thesis contains a short review of a few currently used journal bearing test rigs. The next part of the work deals with a discussion of concept variants and a definition of important parameters. The last part contains a detailed description of the designed radial journal bearing simulator. Limitations of the designed simulator and recommendations for future improvements are also discuss

APA, Harvard, Vancouver, ISO, and other styles

20

Kasolang, Salmiah. "An ultrasonic investigation of various aspects of Hydrodynamic lubrication in a journal bearing." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500198.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Cubillo, Adrian. "Physics-based approach to detect metal-metal contact in the hydrodynamic bearing of a planetary transmission." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/11585.

Full text

Abstract:

Health condition monitoring, commonly referred as Integrated Vehicle Health Management (IVHM) for fleets or vehicles, studies the current and future health state of a system. Health monitoring techniques based on data driven approaches have proven successful in several areas and are easily scalable; however they do not rely on the understating of the physics of failure; whereas Physics-based Model (PbM) approaches require expert knowledge of the failure modes and are based on the understanding of the component behaviour and degradation mechanisms. The development of IVHM is particularly challe

APA, Harvard, Vancouver, ISO, and other styles

22

Miranda, Gregorio do Couto. "The Detection of Journal Bearing Cavitation with Use of Ultrasound Technology." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1459969270.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Giraudeau, Célia. "Influence des discontinuités géométriques sur les performances des paliers en régime thermoélastohydrodynamique (TEHD)." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2298/document.

Full text

Abstract:

Lors de diverses opérations de maintenance, des dégradations au niveau des rotors et des organes de supportage du groupe turbo-alternateur ont pu être constatées. Celles-ci se traduisent souvent par la présence de rayures au niveau des paliers hydrodynamiques, synonymes de fortes discontinuités dans le film d'huile. C'est dans ce contexte que s'inscrivent ces travaux de thèse. L'objectif est d'avoir une meilleure compréhension et prédiction de leur impact sur le fonctionnement du palier. Pour cela, les paliers à géométrie fixe sont étudiés théoriquement et expérimentalement. L'étude théorique

APA, Harvard, Vancouver, ISO, and other styles

24

Dakel, Zaki. "Stabilité et dynamique non linéaire de rotors embarqués." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0087/document.

Full text

Abstract:

Les rotors sont excités non seulement par le balourd tournant mais aussi par les différents mouvements de leur support : turbocompresseurs de véhicules, turbomoteurs aéronautiques, pompes à vide portées en sont des exemples industriels. Ainsi la conception de rotors robustes capables de bien fonctionner sous de telles conditions (excitations extrêmes) est nécessaire pour éviter des instabilités, source de défaillance catastrophique. Le présent travail a pour objectif de prévoir le comportement dynamique d’un rotor embarqué monté sur des paliers rigides ou élastiques hydrodynamiques et soumis à

APA, Harvard, Vancouver, ISO, and other styles

25

Pokorný, Jan. "Výpočtové modelování radiálních hydrodynamických ložisek pro vodní stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382572.

Full text

Abstract:

The aim of this thesis is to calculate the stiffness and damping coefficients for radial hydrodynamic bearings. Cylindrical and lemon hydrodynamic bearings are considered. The solution to this problem mainly depends on the hydrodynamic pressure in the bearing. The numerical solution of the Reynolds equation is used to calculate the pressure. The effect of variable viscosity and density of the lubricant due to temperature changes is considered. The static equilibrium position of the journal centre is also solved. The stiffness and damping coefficients are determined using small amplitude journa

APA, Harvard, Vancouver, ISO, and other styles

26

Lee, Seong-Ryeol, Florian Schoemacker, Christian Stammen, and Katharina Schmitz. "Numerical and experimental study on novel hydraulic pump concept." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71110.

Full text

Abstract:

This paper discusses an investigation on a novel hydraulic pump concept. The idea aims on a pump principle to be directly connected to high-speed electric motors to build compact high-pressure drives. The pump can theoretically work without solid contact and has no kinematic pulsation. The composition of the pump is basically similar to cylindrical journal bearings. In general, a journal bearing is used to support external loads on a rotating shaft. When the shaft rotates with the loads, hydrodynamic fluid force is generated in the fluid film, which compensates the external force and reduces a

APA, Harvard, Vancouver, ISO, and other styles

27

Pap, Bałint. "Modélisation d'un palier hydrodynamique de réducteur épicycloïdal opérant en conditions sévères." Thesis, Poitiers, 2018. http://www.theses.fr/2018POIT2270.

Full text

Abstract:

De nombreux projets visant à réduire l’impact environnemental global des avions sont lancés au niveau européen. L’un des moteurs étudié pour les avions moyens et longs courriers est le moteur Ultra High Bypass Ratio (UHBR) : un moteur simple corps, double flux, à flux externe fortement augmenté. Le moteur UHBR doit être équipé d’un réducteur épicycloïdal, qui est un composant jamais utilisé dans un turboréacteur jusqu’à présent. L’optimisation d’un réducteur épicycloïdal a conduit à l’utilisation de paliers hydrodynamiques pour supporter les pignons satellites du porte-satellites.Pour une tell

APA, Harvard, Vancouver, ISO, and other styles

28

Plantegenet, Thibaud. "Analyse expérimentale de l'effet Morton." Thesis, Poitiers, 2019. http://www.theses.fr/2019POIT2319.

Full text

Abstract:

Cette thèse a pour objectif d’étudier expérimentalement l’effet Morton pour différents types de paliers et un rotor rigide ou flexible. L’effet Morton est un phénomène d’instabilité thermique se produisant dans les paliers hydrodynamiques qui a pour conséquence d’influencer le comportement vibratoire du système rotor-palier. L’introduction permet d’évoquer les différents phénomènes d’instabilité thermique, en se concentrant dans un premier temps sur l’effet Newkirk pour en décrire mathématiquement son fonctionnement et comprendre la philosophie des phénomènes d’instabilité thermique. L’étude b

APA, Harvard, Vancouver, ISO, and other styles

29

Lin, Jaw Ren, and 林昭仁. "On the Hydrodynamic Lubrication of Porous Journal Bearings." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/79836581496644517201.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Chen, Chien-Yu, and 陳建佑. "Analysis of Hydrodynamic Journal Bearings with Novel Elliptical Groove." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33708941834595340234.

Full text

Abstract:

博士<br>臺灣大學<br>機械工程學研究所<br>98<br>A novel elliptical groove is proposed in this work to improve the performance of conventional journal bearings. Firstly, the present work utilizes the spectral element method to calculate the pressure distribution and dynamic coefficients of herringbone-grooved journal bearings (HGJBs), in which the thickness of the fluid film changes abruptly in the groove-ridge region. Conservation of mass is adopted to solve the problem. Additionally, the present method can be adopted for grooves with curvy geometry. It shows that for the case of HGJB, the numerical result by

APA, Harvard, Vancouver, ISO, and other styles

31

Tzeng, Bo-sheng, and 曾柏升. "Dynamic Characteristic Analysis of Hydrodynamic Lubrication in Herringbone-Grooved Journal Bearings." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/06251918481867291058.

Full text

Abstract:

碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>104<br>The steady and dynamic characteristics of the hydrodynamic lubrication for the herringbone-grooved journal bearing with plain sleeve (GJPS) and plain journal bearing with grooved sleeve (PJGS) are analyzed under various design parameters, including the ratio of groove width, ratio of groove depth, groove angle, and position of groove. In the previous studies, the equation of film thickness used by GJPS and PIGS is the same. It has been corrected by this study to obtain an accurate film thickness for GJPS. Reynolds equations suitable for all groove angles

APA, Harvard, Vancouver, ISO, and other styles

32

Chen-YangShih and 施震陽. "Hydrodynamic Analysis of Journal Bearings Considering Anisotropic Slip and Elastic Deformation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/uvfdvj.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Ranjit, Kumar A. "Finite Element Analysis of a Rotor Supported with Hydrodynamic Journal Bearings." Thesis, 2015. http://ethesis.nitrkl.ac.in/7729/1/2015_FINITE_ELEMENT_Kumar.pdf.

Full text

Abstract:

This work was aimed at studying and performing an analysis of a Rotor Bearing System with Journal Bearings by finite element analysis techniques. The Eigenvalue problems for equation of motions of Finite elements applied to rotors and bearings are stated. Design of a rotor bearing system is based upon calculation of various natural frequencies, critical speeds and stability analysis. The results for up to 80 element mesh were plotted. A computational procedure for finding natural frequencies of vibrating rotors with damping, gyroscopic and inertial effects is presented. The dynamic coefficient

APA, Harvard, Vancouver, ISO, and other styles

34

Tzu-HsiangChen and 陳子翔. "Hydrodynamic Analysis of Journal Bearings Considering Effects of Asymmetric Electric Double Layer and Anisotropic Slip." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/zpw59j.

Full text

Abstract:

碩士<br>國立成功大學<br>材料科學及工程學系<br>107<br>In this research, based on many previous studies on electric double layer and hydraulic lubrication, this study hopes to derive an electric double layer model that is more applicable than the previous electric double layer model. The electric double layer effect and the non-isotropic slip are added to the Reynolds equation, and the modified Reynolds equation is derived to make it closer to the real working condition. And considers the hydraulic lubrication performance of the journal bearing under the condition of electric double layer effect and non-isotropi

APA, Harvard, Vancouver, ISO, and other styles

35

Chen, Sheng-jie, and 陳盛杰. "Hydrodynamic Lubrication Analysis of Herringbone-Grooved Journal Bearing." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/14743937400924091547.

Full text

Abstract:

碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>103<br>The design parameters of herringbone-grooved journal bearing (HGJB) are employed in the analysis of the hydrodynamic lubrication theory under different operating parameters in present study. The governing equations include Reynolds equation and the same volume flow rate at the step between the groove and the ridge. They are solved by the finite difference method. Effects of the design parameters of HGJB on lubricating properties, such as load capacity, friction coefficient, pressure and stiffness are investigated. Numerical results show that the film pres

APA, Harvard, Vancouver, ISO, and other styles

36

Chen, Chien-You, and 陳建佑. "Dynamic Analysis of Hydrodynamic Journal Bearing with Herringbone Groove." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/81449971512254798579.

Full text

Abstract:

碩士<br>國立臺灣大學<br>機械工程學研究所<br>92<br>The objective of the study is to investigate dynamic characteristics of grooved journal bearing. The hydrodynamic forces are obtained from the bearing pressure distribution, which is solved from Reynolds equation at each position. The spectral element method is applied to increase the accuracy at the grooved boundary. The trajectories are computed from nonlinear equation of motion analysis, including impulse force and mass unbalance. The stability characteristics of journal bearing system are observed from trajectory and fluid film forces for various geometry

APA, Harvard, Vancouver, ISO, and other styles

37

Luo, Liao-Yong, and 羅廖湧. "Stability Analysis for a Ferrofluid-Based Hydrodynamic Journal Bearing." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/45wh9v.

Full text

Abstract:

博士<br>中原大學<br>機械工程研究所<br>106<br>Abstract Wear is the main cause of reduced mechanical structure and part life, in order to reduce friction, wear, improve mechanical efficiency and extend the life of parts, adding lubricant is the most commonly used methods in the mechanism. Fluid bearings provided effective lubrication and cooling effects also had good anti-vibration capacity and carrying capacity. Hydrodynamic bearing had the advantages of low cost, design system is simple, better vibration resistance and load-bearing capacity, low noise, long life and does not require high-pressure pressure

APA, Harvard, Vancouver, ISO, and other styles

38

yu-tsung, Huang, and 黃昱琮. "Numerical Analysis of Hydrodynamic Journal Bearing Characteristic with Herringbone Grooves." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/13277062401290119203.

Full text

Abstract:

碩士<br>元智大學<br>機械工程學系<br>90<br>The development of hydrodynamic journal bearing is commonly applied to the manufacture industry of DVD and HDD, due to the need of nigh rotating speeds and low load bearing. It uses the regular groove to produce a pressure oily foam and then to separate the journal and bearing for achieving the lubrication. Besides, the oily foam can help to mitigate the problem of vibration. Thin thesis utilized the PHOENICS computer code to analyze the flow field structure for the various grooved geometries of the journal bearing. The effects of important design parametric on th

APA, Harvard, Vancouver, ISO, and other styles

39

Zhong, Nai-Rong, and 鐘乃榕. "Optimal Design of Ferrofluid Hydrodynamic Journal Bearing System Using the Taguchi Method." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/16001983909295271159.

Full text

Abstract:

碩士<br>中原大學<br>機械工程研究所<br>105<br>The fluid bearing has been widely used in the mechanical construction. However, it has been found that fluid bearings may become unstable while in operation (e.g., Whirl and Whip), which may cause damage to bearing assemblies via collision and friction. In order to improve the bearing instability, this study lists the parameters that affect the critical speed as much as possible, and select the control factor from Taguchi analysis. In this study, use Ferrofluid Hydrodynamic Journal Bearing for the experimental system, by changing the Ferrofluid volume fraction,

APA, Harvard, Vancouver, ISO, and other styles

40

Chen, Sen-Hom, and 陳顯鴻. "Eccentricity influence for pressure distribution and rotordynamic coefficient in a hydrodynamic journal bearing." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/01349835011927289440.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Tang-Lun, Change, and 張堂倫. "Stability Analysis of a Ferrofluid Hydrodynamic Journal Bearing System with Halbach Array Magnetic." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/cu34qb.

Full text

Abstract:

碩士<br>中原大學<br>機械工程研究所<br>103<br>Nowadays,the fluid-lubricated bearing applying in the rotating machines are very widespread. However some instability phenomenas ,such as oil whip and oil whirl, will appear when the fluid-lubricated bearing is working. These phenomenas will make bearing vibrating and decrease life of machine. Against to solve this problem, the research propose a solution to optimization the instability phenomenas. We use ferrofluid replace used lubrication,and set Halbach array magnetic field to change ferrofluid characteristic to increase the frequencies of fluid-induced self-

APA, Harvard, Vancouver, ISO, and other styles

42

Chen, Ting-Yu, and 陳廷宇. "Magnetic Field Analysis and Stability of a Hydrodynamic Journal Bearing System Lubricated with Ferrofluid." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/7358m5.

Full text

Abstract:

碩士<br>中原大學<br>機械工程研究所<br>102<br>Nowadays, the fluid fluid-lubricated bearings applying in the rotating machines are very widespread. However, these rotor interaction systems need to consider the instability phenomena induced by the lubricated fluid, such as the fluid whirl and fluid whip. The fluid-induced self-excited vibrations of rotor will make the journal rubbing or striking to bearing and may demand the machine parts. By these lights, the research proposed a solution to chance and promote the frequencies of fluid-induced self-excited vibrations by a ferrofluid and an additional magnetic

APA, Harvard, Vancouver, ISO, and other styles

43

Wu, Chia-Ho, and 吳嘉和. "Vibration and Noise Analysis of Hydrodynamic Journal Bearing with Herringbone Groove use for Fan." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/07284961739510070664.

Full text

Abstract:

碩士<br>國立臺灣大學<br>機械工程學研究所<br>93<br>The objective of the study is to investigate the vibration and noise characteristics of hydrodynamic journal bearing with herringbone groove use for centrifugal fan. The design parameters of groove refers to the paper which is about the optimization design of groove. The bearings are made with different types of grooves for the purpose of analyzing the influence of deign parameters on vibration and noise. The vibration measured by piezoelectricity accelerometer will be the reference of the stability of bearing. And the power loss made by the friction between s

APA, Harvard, Vancouver, ISO, and other styles

44

Lin, Jyun-Ting, and 林俊廷. "Numerical Study of Thermal Effects in the Coupled Herringbone-Grooved Journal and Thrust Hydrodynamic Bearing." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/62552745276538016561.

Full text

Abstract:

碩士<br>元智大學<br>機械工程學系<br>104<br>We numerically analyzed a hydrodynamic bearing with thermal effects by solving Navier-Stokes and energy equations. For a hydrodynamic bearing (HDB), it is well known that high temperature affects the lubricant viscosity and the bearing load capacity. Therefore, the main objective of this study is to present temperature and pressure distribution of a hydrodynamic bearing under different values of lubricant viscosity and eccentricity ratio. In this study, the results include the verification of Sommerfeld number for a journal bearing, pressure and temperature distr

APA, Harvard, Vancouver, ISO, and other styles

45

Lin, Hung-Lung, and 林宏龍. "Measurement of Dynamic Characteristics of a Herringbone-grooved Hydrodynamic Journal Bearing used in a Notebook Cooling Fan." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/73782715625975865778.

Full text

Abstract:

碩士<br>國立臺灣大學<br>機械工程學研究所<br>96<br>Lubricant of hydrodynamic journal bearing substitutes the steel ball of ball bearing to support the shaft under rotating. The lubricant-film force, which is often defined by a set of linear stiffness and damping coefficients, plays a critical role in a hydrodynamic journal bearing. This study presents an experimental method to determine the stiffness and damping coefficients of herringbone grooved hydrodynamic journal bearing used in a cooling fan. In this work, we will discuss the static loading effects and rotating speed effects on the stiffness and damping

APA, Harvard, Vancouver, ISO, and other styles

46

Lin, Hung-Lung. "Measurement of Dynamic Characteristics of a Herringbone-grooved Hydrodynamic Journal Bearing used in a Notebook Cooling Fan." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2207200820322300.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Chiang, Hsiu-Lu, and 江新祿. "Analysis of Combined Effects of Couple Stress and Roughness on the Hydrodynamic Performance of the Journal Bearing." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/90841971330614208203.

Full text

Abstract:

博士<br>中原大學<br>機械工程研究所<br>91<br>According to the Stokes microcontinuum theorem and the Christensen’s stochastic model, the main objective of this paper is to theoretically predict the combined influences of couple stresses and surface roughness on the lubrication performance of journal-bearing systems. To take account of both the presence of surface roughness of bearings and the couple stress effect due to the lubricant containing the polar suspensions, the generalized stochastic non-Newtonian Reynolds-type equation is derived and applied to evaluate the equilibrium solution of a short journal

APA, Harvard, Vancouver, ISO, and other styles

48

Φαρμακόπουλος, Μιχαήλ. "Σχεδιασμός υβριδικού εδράνου ολίσθησης (υδροδυναμικού - ηλεκτρομαγνητικού)". Thesis, 2015. http://hdl.handle.net/10889/8525.

Full text

Abstract:

Η παρούσα διδακτορική διατριβή αναφέρεται σε έδρανα ολίσθησης. Συγκεκριμένα, αναφέρεται στο σχεδιασμό και την κατασκευή ενός νέου, πρωτότυπου υβριδικού εδράνου ολίσθησης, το οποίο έχει τη δυνατότητα να λειτουργεί είτε ως υδροδυναμικό, είτε ως ενεργό ηλεκτρομαγνητικό, είτε ως υβριδικό, δηλαδή υδροδυναμικό και ενεργό ηλεκτρομαγνητικό ταυτόχρονα. Προκειμένου να πραγματοποιηθεί ο σχεδιασμός και η κατασκευή του συγκεκριμένου υβριδικού εδράνου ολίσθησης, έγιναν υπολογισμοί και προσομοίωση του υδροδυναμικού πεδίου για τα υδροδυναμικά έδρανα ολίσθησης και του ηλεκτρομαγνητικού πεδίου για τα ηλεκτρομα

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!