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Dissertations / Theses on the topic 'Lubricated journal bearings'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Collins, D. "The vibrational characteristics of oil lubricated plain journal bearings." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373844.

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2

Khan, Muhammad Zubair. "Performance studies of oil lubricated helical groove journal bearing." Thesis, Brunel University, 1992. http://bura.brunel.ac.uk/handle/2438/5434.

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The provision of helical grooves on the surface of a plain journal bearing can improve the stability of a rotor-bearing system. However, the improvement depends on the arrangement of the grooves along the axial length of the bearing. In order to verify this improved stability three types of helical groove bearing and a reference plain journal bearing were investigated. The helical groove journal bearings were: a symmetrical, an asymmetrical and a partial grooved bearing. The bearing test rig was used to measure the oil flow rate, load carrying capacity, power losses, bearing surface temperatur

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3

Piekos, Edward S. (Edward Stanley). "Numerical simulation of gas-lubricated journal bearings for microfabricated machines." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/16738.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2000.<br>Includes bibliographical references (p. 203-208).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Numerical simulations of gas-lubricated journal bearings for microfabricated machines are performed with specialized tools. To maximize flexibility, an orbit method formulation is chosen for the primary tool. Its pseudospectral fluid equation solver enables run-time resolution adjustment while

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4

Elgezawy, Ahmed Sayed. "A theoretical and experimental study of water lubricated non-metallic journal bearings." Thesis, Queensland University of Technology, 1996.

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5

Cabrera, D. L. "An investigation into the operation of water-lubricated rubber journal bearings." Thesis, Liverpool John Moores University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521743.

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6

Heberley, Brian Douglas. "Advances in hybrid water-lubricated journal bearings for use in ocean vessels." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81753.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (p. 439-441).<br>The outboard bearings that support shafts in naval ships and submarines present unique challenges to designers, shipbuilders, and operators. Such bearings must operate continuously and reliably in demanding environments at speeds that vary

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7

Hirayama, Tomoko. "Basic Studies on Performances of Small-Sized Oil-Lubricated Spiral-Grooved Journal Bearings." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148906.

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8

Tanamal, Tan Kong Hong Ryan. "Modelling of fluid flow in multiple axial groove water lubricated bearings using computational fluid dynamics." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16531/1/Tan_Tanamal_Thesis.pdf.

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Extensive research has been conducted in the area of journal bearings over many years for various operating conditions and geometry, effects of different types of lubricants (oil and water), different numbers (zero, one and three) and positions of grooves and the flow of lubricant between the shaft and bearing. One area of research has been developing methods to minimize the experimental time and cost of predicting the performance of journal bearings operating over a wide variety of conditions. This has led to numerical methods being developed and utilised for this purpose. Numerical methods a

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9

Tanamal, Tan Kong Hong Ryan. "Modelling of fluid flow in multiple axial groove water lubricated bearings using computational fluid dynamics." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16531/.

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Extensive research has been conducted in the area of journal bearings over many years for various operating conditions and geometry, effects of different types of lubricants (oil and water), different numbers (zero, one and three) and positions of grooves and the flow of lubricant between the shaft and bearing. One area of research has been developing methods to minimize the experimental time and cost of predicting the performance of journal bearings operating over a wide variety of conditions. This has led to numerical methods being developed and utilised for this purpose. Numerical methods a

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10

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.

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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

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11

Heberley, Brian Douglas. "Advances in hybrid water-lubricated journal bearing for use in ocean vessels." Thesis, Cambridge, Massachussetts, Massachussetts Institute of Technology, 2013. http://hdl.handle.net/10945/41622.

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CIVINS<br>The outboard bearings that support shafts in naval ships and submarines present unique challenges to designers, shipbuilders, and operators. Such bearing must operate continuously and reliably in demanding environments at speeds that vary from below 1 rpm to well over 100 rpm. Water-lubricated bearings typically used for these applications operate hydrodynamically and are prone to adverse effects at lower speeds such as increased abrasive and adhesive wear as well as stick-slip shaft motion. This project focuses on developing a hybrid journal bearing capable of operating with hydr

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12

Hedström, Gabriel. "Structural and tribological analysis of harvester crane joint." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-69653.

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Grease-lubricated journal bearings are widely used in heavy duty applications, such as construction equipment, agriculture- and forest machines. The main purpose of the grease-lubricated journal bearing is solely to create sustainable rotation of a given application. However, purpose seldom decides complexity of journal bearing design. Depending on application, parameters such as Load , Material and Lubrication immensely increase complexity of the design. Tribology is a highly interdisciplinary subject, which requires knowledge concerning physics, chemistry, metallurgy and solid mechanics. Tr

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13

Rahmani, Faisal. "Tribodynamics of powder lubricated journal bearings." Thesis, 2018. http://localhost:8080/iit/handle/2074/7774.

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14

賴勁憲. "Performance of Porous Air-Lubricated Journal Bearings." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/54576347851946234356.

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碩士<br>國立中興大學<br>機械工程學系<br>90<br>Abstract This paper applies Reynolds equation to analyze the lubrication performance of the journal bearing. Darcy's law is used to describe the pressure distribution of the porous media. A nonlinear coupled equation are then used to analyze the characteristics of the porous journal bearings Three dimensionless parameters, namely, the permeability factor K, the bearing numberΛ, and the eccentricity ratioε,are employed to characterize the bearing performance. The results of the compressible air bearing compared with that of the equivalen

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15

Lawrence, Tom Marquis. "Characterization and Measurement of Hybrid Gas Journal Bearings." 2012. http://hdl.handle.net/1805/2926.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>This thesis concentrates on the study of hybrid gas journal bearings (bearings with externally pressurized mass addition). It differs from most work in that it goes back to “basics” to explore the hydrodynamic phenomena in the bearing gap. The thesis compares geometrically identical bearings with 2 configurations of external pressurization, porous liners where mass-addition compensation is varied by varying the liner’s permeability, and bushings with 2 rows of 6 feedholes where the mass-addition compensation is varied by the feedho

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16

chen, shang te, and 陳尚德. "Analysis of Porous Journal Bearing Lubricated." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/45323282820741116456.

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碩士<br>國立中興大學<br>機械工程學系<br>92<br>This paper analyze the lubrication performance of surrounding oil supply porous journal bearings. Reynolds equation is used to describe the lubrication performance of journal bearing. Darcy’s law is used to describe the pressure distribution inside the porous media. These two coupled equations and applied Reynolds condition are then used to analyze the characteristics of the surrounding oil supply porous journal bearings. This paper analyze the performance of infinite long surrounding oil supply porous bearing by three dimensionless parameters ( the p

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17

Tseng, Chin-Sheng, and 曾進生. "The study of hydrostatic journal bearing lubricated with ferrofluid." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/sss32r.

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碩士<br>中華大學<br>機械工程學系碩士在職專班<br>101<br>This thesis studies the characteristics of hydrostatic bearings lubricating with ferrofluid. The multi-pocket capillary compensated bearings has been studied to simulate lubricant film and to determine the influences of magnetic field, magnetic fluid, couple stress parameters, restrictor and geometry and physical parameters of bearing on the static and dynamic performances and stability of a rotor-bearing system. The modified Reynolds equation is developed by using Stoke couple stress fluid theory as well as Jenkins model. The Reynolds equation is split

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18

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.

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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

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19

Hsieh, Hung-Tai, and 謝宏泰. "Study of the Tribological Performance and Durability of the Grease-Lubricated Reciprocating Journal Bearing Tester." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/28135136141732594298.

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碩士<br>崑山科技大學<br>機械工程研究所<br>101<br>This study analyzes the tribological performance of the test results of the journal bearing wear tester designed for the simulation of the toggle pin motion in the plastics injection molding machine. The tests were divided into two parts. The first part was to find the optimal operating condition combination among the selected test factors and levels by the Taguchi method. The second part was the durability test of two different kinds of grease. Results showed the optimal operating combination of the selected factors from the tribological viewpoint is valid an

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