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Rozprawy doktorskie na temat „Bearing characteristics”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 26 lipca 2025

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1

Al, Jughaiman Bader K. "Static and dynamic characteristics for a two-axial-groove bearing and a pressure-dam bearing." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1816.

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2

Gunduz, Aydin. "Multi-Dimensional Stiffness Characteristics of Double Row Angular Contact Ball Bearings and Their Role in Influencing Vibration Modes." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1326397623.

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3

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.

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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

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4

Skjæret, Nina. "Weight-bearing characteristics during standing in adults with Cerebral Palsy." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bevegelsesvitenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13165.

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Aim: The aim of this study was to investigate weight-bearing characteristics in young adults with CP compared to young healthy adults in both quiet and relaxed standing. Methods: Two standing conditions were tested, one minute quiet standing (QS) and one minute relaxed standing (RS) in both groups. Data were collected with two Kistler force plates and a video camera. Weight-bearing asymmetries, shifts in weight bearing and CoP movements under each foot were calculated in Matlab, and PSAW Statistics was used for statistical analysis. Results: There were large individual differences in weight be

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5

Guo, Jenq-Shan. "Characteristics of the nonlinear hysteresis loop for rotor-bearing instability." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1062688989.

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6

Kucuk, N. C. "Modelling and identification of dynamic characteristics of a squeeze-film bearing." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382252.

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7

Jones, Andrew Christopher. "An investigation of the performance characteristics of isothermal calorimeters." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264979.

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8

Erdemir, Ali. "A study of surface metallurgical characteristics of tin coated bearing steels." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/20134.

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9

Ha, Duc Nhin. "The floating and dynamic characteristics of a squeeze-film air bearing." Thesis, Brunel University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422456.

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10

Sianaki, A. H. "Parametric identification of squeeze-film bearing characteristics : a continuous time approach." Thesis, University of Edinburgh, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.661888.

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11

Gebretsadik, Daniel Woldegebriel. "Tribological characteristics of some multi-layered Pb-free engine bearing materials." Doctoral thesis, Luleå tekniska universitet, Maskinelement, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62495.

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Lead (Pb) containing alloys such as white metals and Cu-Pb-Sn (lining) with Pb-based overlay plating have been extensively used as materials for internal combustion engine bearings during the last several decades. However, owing to environmental and health concerns, the use of Pb containing materials in automotive engine components is being restricted. In view of this, attempts are under way to develop and replace Pb-containing materials with Pb–free bearing materials. The tribological characteristics of these recently developed Pb-free bearing materials have, however, not been fully investiga

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12

Gandra, Sachin. "The effect of reservoir characteristics on methane production from hydrate bearing formations." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4763.

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Thesis (M.S.)--West Virginia University, 2006.<br>Title from document title page. Document formatted into pages; contains x, 72 p. : ill. (some col.), maps. Includes abstract. Includes bibliographical references (p. 69-72).

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13

Smith, Andrew J. J. "Effects of Age on Knee Activation Characteristics during Weight Bearing and Directional Loading." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22718.

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We developed a novel approach that requires subjects to produce and finely tune ground reaction forces (GRFs) while standing. Using this method we were able to identify specific contributions of individual muscles and how these contributions change with the effects of age. One of the aims of this investigation was to determine whether electromyographic data in our findings was due to random muscle activation or representative of a neuromuscular control strategy. Ten healthy young adults (5 male, 5 female) with their dominant foot fixed within a boot mounted to a force platform participated twi

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14

Prase, Björn. "Characteristics of hydrodynamic plain bearings with bonded coating." Technische Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A21228.

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Increasing ecological and economic pressures, as well as increased technical requirements, have given rise to the need for research into alternative wear layers for hydrodynamic plain bearings. Previous investigations have tested and researched the bonded coating GL92. It has been possible to demonstrate that the bonded coating (plastic base) is a viable alternative to a conventional white metal alloy. However, this coating was not able to address all the issues experienced by industrial users, for example the behaviour of the system (changes to operating properties) during penetration of part

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15

Kwan, Y. B. P. "Processing and fluid flow characteristics of hot isostatically pressed porous alumina for aerostatic bearing applications." Thesis, Cranfield University, 1996. http://dspace.lib.cranfield.ac.uk/handle/1826/3690.

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Despite their well known superior load and stiffness characteristics, the wide-spread use of porous aerostatic bearings in preference to other bearing types has been hampered by difficulties in controlling the permeability of the porous material during manufacture and machining, in addition to instability problems caused by the additional volume of air trapped amongst the pores. Recent development in porous aerostatic bearings centres around the use of a thin dense surface layer to overcome the stability problem. The production of single and two-layered porous ceramic structures for aerostatic

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16

Butler, Shannon Catherine. "Early diet modifies small intestinal morphological characteristics and IgA-bearing cells in the BB rat." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40032.pdf.

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17

Palmer, Mark. "Experimental investigation of the dynamic characteristics of a three lobe bearing at high rotational speeds." Thesis, Cranfield University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391575.

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18

Rahmanzadeh-Asl, Mahmoud. "Effect of inlet port position on the static and dynamic characteristics of a journal bearing." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/47737.

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Rowan, D. "Design and development of a high-speed test facility and the measurement of the fluid film characteristics of journal bearings." Thesis, Cranfield University, 1998. http://dspace.lib.cranfield.ac.uk/handle/1826/11357.

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In the theoretical analysis of high speed rotor bearing systems, it is common to use four displacement and four velocity based coefficients, which characterise the behaviour of the lubricating fluid film. Although a great deal of work has been published establishing theoretical models of all types of hydrodynamic journal bearings, the large amount of experimental work has centred on relatively low speed conditions. This work presents a contribution to the experimental study of the static and dynamic characteristics of oil films in journal bearings used in high-speed rotating machinery. The mai

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20

Hobbs, Robert Anthony. "Solidification characteristics, microstructural stability and creep behaviour of advanced ruthenium-bearing nickel-base single crystal superalloys." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604115.

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The principal objective of this thesis is to identify the mechanism(s) by which Ru retards topologically close-packed (TCP) precipitation and to assess its influence on single crystal solidification and intermediate to high temperature creep, with the aim of improving the casting yield of next generation single crystal turbine blades whilst maintaining creep resistance and long term microstructural stability. The effect of Ru on single crystal solidification was found to be negligible, suggesting its concentration may be adjusted to levels necessary to improve other properties, such as microst

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21

Straub, D'Arcy Winston. "Iron-bearing minerals--relationships to the near infrared and radiothermal emissivity characteristics of the Venusian surface." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/58027.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.<br>Includes bibliographical references (p. 208-214).<br>by D'Arcy Winston Straub.<br>Ph.D.

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22

Sjökvist, Thobias. "Influence of Ferrochromium and Ferromanganese Additions on Inclusion Characteristics of Steel." Doctoral thesis, KTH, Materials Science and Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3150.

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23

Wang, Chao. "Static, dynamic and levitation characteristics of squeeze film air journal bearing : designing, modelling, simulation and fluid solid interaction." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/5832.

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Bearings today need to be able to run at very high speed, providing high positional accuracy for the structure that it supports, and requiring very little or no maintenance. For this to happen, bearings must have tight tolerances and very low or zero friction during operation. This pushes many traditional contact-type bearings to their limits as they often fail due to friction, generating heat and causing wear. By comparison, existing non-contact bearings fare better because of their very low or zero friction. But some have their own problem too. For example, the fact that aerostatic bearings

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24

Snyder, Troy Alan. "On Hydrodynamic Lubrication using Perturbed Reynolds equation and CFD-FSI: Static and Dynamic Characteristics of Compliant Marine Bearings." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron157552061871739.

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25

Rahal, M. Dwayne. "Genesis of a "Null" lymphocyte population with natural killer cell characteristics in bone marrow of normal and tumor-bearing mice." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74371.

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Mouse bone marrow was shown to contain a population of null lymphocytes which lack molecular markers of both B and T lineages ($ mu sp-,$ B220$ sp-,$ Thyl$ sp-).$ Null cells represent 12-14% of all bone marrow small lymphocytes. Studies on population dynamics have revealed that these null cells turnover rapidly with a production rate almost 1/3 as great as that of B lymphocytes. Some newly-formed null lymphocytes express natural killer (NK) cell-associated markers, including NK1.1. Some small lymphocytes in the bone marrow express low intensities of Thyl. These Thyl$ sp{ rm lo}$ cells are also

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26

Raharjo, Parno. "An investigation of surface vibration, airbourne sound and acoustic emission characteristics of a journal bearing for early fault detection and diagnosis." Thesis, University of Huddersfield, 2013. http://eprints.hud.ac.uk/id/eprint/19034/.

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High power machinery such as steam turbines, large pumps and motors often use journal bearings as rotor supports. This type of bearing is simple, low cost and with high load carrying capacity. However, abnormal operating conditions in the journal bearings will degrade machine performance, increase operating cost and may cause unexpected sudden failure which is dangerous in both engineering and safety terms. Bearing condition monitoring can detect faults at an early stage and prevent the occurrence of such failures which can be catastrophic. Monitoring techniques that have been used for monitor

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27

Harris, Joel Mark. "Static characteristics and rotordynamic coefficients of a four-pad tilting-pad journal bearing with ball-in-socket pivots in load-between-pad configuration." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3194.

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28

Doostmohammadi, Hamid. "A Study of Slag/Metal Equilibrium and Inclusion Characteristics during Ladle Treatment and after Ingot Casting." Doctoral thesis, KTH, Materialvetenskap, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11596.

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Today, there is a high demand on clean steel for high performance materialproperties. Thus, steel producers try to deliver a steel product with the highestquality and cleanliness to the market. The number of parameters that affect thesteel cleanliness may vary depending on the required material properties of thefinal product. However, the non-metallic inclusion characteristics represent one ofthe most important parameters. More specifically, the composition, size, numberand morphology affect steel cleanliness. In this work, selected parameters affectingthe inclusion characteristics were studie

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29

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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30

Jayakody, Arachchige Shiran Pradeep. "Investigation on characteristics and performance of recycled concrete aggregates as granular materials for unbound pavements." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/78131/1/Shiran%20Pradeep_Jayakody%20Arachchige_Thesis.pdf.

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This research was a step forward in investigating the characteristics of recycled concrete aggregates to use as an unbound pavement material. The results present the guidelines for successfully application of recycled concrete aggregates in high traffic volume roads. Outcomes of the research create more economical and environmental benefits through reducing the depletion of natural resources and effectively manage the generated concrete waste before disposal as land fill.

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Сов’як, Іван Миколайович, та Ivan Sovjak. "Дослідження і модернізація шпиндельного вузла копіювально-фрезерного верстату для підвищення жорсткісних характеристик". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2018. http://elartu.tntu.edu.ua/handle/lib/24147.

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У дипломній роботі розглянуті питання, які пов'язані з напрямками модернізації фрезерних верстатів, аналіз варіантів модернізацій, аналіз конструкції базової моделі верстата, задачі проектування., дослідженням комплексу формотворних рухів на верстаті для їх повного або часткового забезпечення. Реалізовано проектний розрахунок та розробку окремих вузлів верстата. Проведена розробка кінематичної схеми і кінематичний розрахунок модернізованого вузла – шпиндельної бабки, визначення потужності приводу головного руху, вибір електродвигуна і силовий розрахунок, розрахунок на міцність зубчатих коліс м

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32

Kern, Colin. "Betriebsverhalten von thermisch und mechanisch hoch beanspruchten kunststoffbeschichteten Radial-Mehrflächengleitlagern." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-71977.

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Die vorliegende Arbeit verfolgte die Zielstellung der Substitution des etablierten Weißmetalls als Laufschicht von hydrodynamischen Mehrflächengleitlagern durch neuartige Kunststoffschichten. Dazu wurden vergleichende Bauteilversuche an Mehrflächengleitlagern mit verschiedenen Laufschichten und Bohrungsformen vorgenommen. Eine Zinnbasislegierung als Laufflächenbeschichtung diente dabei als Referenzwerkstoff. Zur Durchführung des Versuchsprogrammes kam ein vorhandener, messtechnisch neu konditionierter Turbinenlagerprüfstand zum Einsatz. Die Versuchsreihen haben durchweg positive Beurteilungen

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33

Ларін, Пилип Миколайович. "Пристрій пеленгування повітряних об’єктів". Master's thesis, Київ, 2018. https://ela.kpi.ua/handle/123456789/25601.

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Метою наукового дослідження є створення тракту вимірювання кута напрямку на повітряний об’єкт з шумоподібним сигналом за допомогою пакету програм Lab View. Об’єктом дослідження є процес вимірювання кута напрямку на ціль відносно акустичної вісі за допомогою прийомників тиску і коливальної швидкості. Предметом дослідження є алгоритм визначення значення кута напрямку на ціль з використанням середовища та інструментальних можливостей пакету Lab View. Результатом роботи є: дослідження принципу дії трактів пеленгування; дослідження умови вірного вимірювання пеленгу на ціль акустичними методами

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34

Netscher, Heather Gayle. "The neuro-muscular and musculo-skeletal characterization of children with joint hypermobility." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/30295/1/Heather_Netscher_Thesis.pdf.

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In children, joint hypermobility (typified by structural instability of joints) manifests clinically as neuro-muscular and musculo-skeletal conditions and conditions associated with development and organization of control of posture and gait (Finkelstein, 1916; Jahss, 1919; Sobel, 1926; Larsson, Mudholkar, Baum and Srivastava, 1995; Murray and Woo, 2001; Hakim and Grahame, 2003; Adib, Davies, Grahame, Woo and Murray, 2005:). The process of control of the relative proportions of joint mobility and stability, whilst maintaining equilibrium in standing posture and gait, is dependent upon the comp

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Netscher, Heather Gayle. "The neuro-muscular and musculo-skeletal characterization of children with joint hypermobility." Queensland University of Technology, 2009. http://eprints.qut.edu.au/30295/.

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In children, joint hypermobility (typified by structural instability of joints) manifests clinically as neuro-muscular and musculo-skeletal conditions and conditions associated with development and organization of control of posture and gait (Finkelstein, 1916; Jahss, 1919; Sobel, 1926; Larsson, Mudholkar, Baum and Srivastava, 1995; Murray and Woo, 2001; Hakim and Grahame, 2003; Adib, Davies, Grahame, Woo and Murray, 2005:). The process of control of the relative proportions of joint mobility and stability, whilst maintaining equilibrium in standing posture and gait, is dependent upon the comp

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36

Sabbagh, F. "Wear characteristics of cast iron and steel under boundary lubricated conditions : A study of boundary lubricated wear of cast iron piston rings and its relation to their wear under engine conditions, with a comparative wear study on roller bearing steel." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381032.

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Chen, Juhn-Horng, and 陳俊宏. "Identification of Linearized Characteristics of Bearings in Rotor-Bearing Systems." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/24464136957993458029.

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Tsai, ChiPing, and 蔡其平. "Characteristics Analysis of Hydrostatic Bearing with capillary Restrictions." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/57920654539967014972.

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碩士<br>東南科技大學<br>機械工程研究所<br>100<br>This study is primarily focusing on the influences of hydrostatic radial bearing on load capacity and static stiffness with different parameters, including number of recess, restriction, recess length ratio, and displacement ratio in capillary restriction. We constructed the flow continuity equations for each recess using Flow Resistance Network (FRN) method, solved the set of equations for pressure ratios, and then further obtained the load capacities and static stiffness. The FRN method establishes the flow rates and interactions within themselves in a multi

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39

OuYang, Chun-Nan, and 歐陽俊男. "The characteristics of CD11b+ cells in tumor-bearing mice." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/32520704959939774515.

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碩士<br>長庚大學<br>基礎醫學研究所<br>95<br>Tumor-associated macrophages (TAMs) are known to be part of inflammatory circuits that promote tumor progression. They are attracted from the circulation into the tumor stroma by the chemokines and differentiate into TAMs. Latent membrane protein-1 (LMP-1) is an Epstein-Barr virus oncoprotein, which is highly associated with malignancies, including nasopharyngeal carcinoma (NPC). It acts as a ligand-independent tumor necrosis factor receptor (TNFR), resulting in cell transformation. In addition, LMP-1 was also shown to upregulate the secretion of several cytokine

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40

Hu, Sheng-Yen, and 胡聖彥. "Characteristics Analysis of Constant-flow Valve for Hydrostatic Bearing." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/90621275749942677586.

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碩士<br>中原大學<br>機械工程研究所<br>100<br>Constant-flow valves have been presented in industrial applications or academic studies, which compensate pressures of bearing recesses as load fluctuates. The flow rate of constant-flow valves can be constant in spite of the pressure changes in recesses. However, specific condition of design parameters must be satisfied. This paper utilizes analytical method to study the static and dynamic characteristics of constant-flow valves, three types of constant-flow valve are DDE-type, DSI-type, and spool-type. The static analysis gives the specific relationships among

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41

ITOH, Y., T. KAMIMURA, M. HIROHATA, and T. MORI. "DETERIORATION CHARACTERISTICS OF Sn-BEARING STEEL BY ACCELERATED EXPOSURE TESTS." 2013. http://hdl.handle.net/2237/18867.

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Chang, Jer-Rong, and 張哲榮. "A Study on Dynamic Characteristics of Geared Rotor-Bearing System." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/83738202872182721874.

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博士<br>國立成功大學<br>航空太空工程學系<br>85<br>This thesis is concerned with the dynamic analysis of a geared rotor-bearing system. A finite element model of the geared rotor-bearing system is developed by taking account of the lateral-torsional coupling effect to obtain the natural frequencies, mode shapes, and the steady-state responses. From the response time histories, the FFT spectra can be obtained to investigate the effects of dynamic coupling terms under different grades of balance quality and s

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Chen, Chin-An, and 陳金安. "Research on the Dynamic Characteristics of the Aerostatic Spindle Bearing." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/25958333058371263742.

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碩士<br>國立彰化師範大學<br>工業教育學系<br>89<br>The purpose of this research is to analyze the static and dynamic behaviors of air turbine aerostatic spindle thrust bearing with/without grooves. First, in order to calculate the bearing relative behaviors to include load capacity、stiffness and flow by the current applied force using the resistance network method. Then with motion equation, including squeeze film effect to analyze the stability of cutting force. Its motion equation uses integration method to solve it. A thrust bearing set for an air turbine spindle has been designed and proposed. F

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Chirathadam, Thomas. "Metal Mesh Foil Bearings: Prediction and Measurement for Static and Dynamic Performance Characteristics." Thesis, 2012. http://hdl.handle.net/1969.1/148301.

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Gas bearings in oil-free micro-turbomachinery for process gas applications and for power generation (< 400 kW) must offer adequate load capacity and thermal stability, reliable rotordynamic performance at high speeds and temperatures, low power losses and minimal maintenance costs. The metal mesh foil bearing (MMFB) is a promising foil bearing technology offering inexpensive manufacturing cost, large inherent material energy dissipation mechanism, and custom-tailored stiffness and damping properties. This dissertation presents predictions and measurements of the dynamic forced performance of v

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Hung, Yu-Hong, and 洪宇宏. "Characteristics Analysis of Hydrostatic Closed-type Bearing Using Double-action Compensations." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/87v2q3.

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碩士<br>中原大學<br>機械工程研究所<br>98<br>This thesis of a serial studies for studying constant and variable compensations of the closed-type hydrostatic flat bearing. In this part, the double-action variable restrictors including cylindrical-spool, conical-spool and membrane types and self-compensation are taken into consideration. Analysis of the recess pressure versus displacement ratio of worktable and load capacity and static stiffness. Characteristics of hydrostatic closed-type bearing using double-action compensations. The static stiffness of will be also determined by the same method as shown

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Lo, Wu-Jen, and 羅武仁. "Dynamic Characteristics Analysis and Testing of a Microturbine Rotor-Bearing System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/61932283777594980230.

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碩士<br>國立清華大學<br>動力機械工程學系<br>91<br>This paper can be divided into two parts, which are numerical analysis and experimental equipment construction and testing. In numerical analysis, we mainly use the finite element method as our basis and MATLAB program design software as our tool, to write the numerical analysis program for a rotor-bearing system. This rotor-bearing system consists of rigid disks, distributed parameter finite rotor elements, and discrete bearings. During modeling of the system, the finite element model includes the effects of translation inertia, rotatory inertia, g

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Sun, Shi-Mu, and 孫士牧. "Development of a Small Magnetic Bearing and Research on its Characteristics." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/24882604798995780681.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>87<br>The aim of this thesis is to develop a small magnetic bearing fit for a turbo molecular pump and research on its characteristics. By observing the magnetic behavior between two magnets, three kinds of passive magnetic bearing types are designed. Comparing with these kinds of bearing types, the passive radial magnetic bearing composed of axial magnetized rings is decided because it can produce a magnetic force that keeps the rotor a certain range of the radial direction. For comprehending the characteristics of this magnetic force experiments are carried out

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Wu, Fu-Shin, and 吳馥馨. "Dynamic Stiffness Characteristics Analysis and Testing of a Passive Magnetic Bearing." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/40119919073731861677.

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碩士<br>國立清華大學<br>動力機械工程學系<br>95<br>Turbo molecular pump, an accurate mechanism, is characterized by the small volume and high rotary speed (3,000~60,000rpm). To achieve contact-free rotor spinning in the confined space, passive magnetic bearing system inside the pump must be designed accurately to avoid the unstableness of the rotor, which requires the design of the bearing to attain the preciseness in the micrometer’s level. Thus, the study aims to analyze the dynamic stiffness of passive magnetic bearing and to design the stiffness of the bearing for the system. Two parts are covered in this

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Hwu, Chwan-Jing, and 胡傳菁. "Surface Roughness Effects on the Squeeze Film Characteristics of Partial Journal Bearing." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/18904834786032075178.

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碩士<br>中原大學<br>機械工程學系<br>88<br>The present study examines the surface roughness effects on the squeeze film characteristics of a finite partial journal bearing. We can derive the Reynolds’ equation from the momentum equations and the continuity equation and further adopt the stochastic models to develop the stochastic Reynolds’ equation describing the uniform, isotropic roughness. After obtaining the pressure distribution of the squeeze film, we can calculate the surface roughness effects on the squeeze film characteristics. The results of the study show that the surface roughness effects ha

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Huang, Yi-Xiang, and 黃翊祥. "Characteristics of Worktable Supported by Hydrostatic Planar Bearing Compensated by DSI Valves." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/2tr3q6.

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碩士<br>中原大學<br>機械工程研究所<br>103<br>DSI valve was published in AD 1964 by Rippel, its spool is composed of two piston head with a combination of the post, before and after the change by the pressure on the piston and DSI different internal flow resistance of the throttle valve , allowing the flow of oil through the DSI after the throttle bearing oil film has a certain stiffness performance, in order to support oil platform hydrostatic bearing. Equality of the equation by the continuous oil pad and compensator traffic can be derived bearing pressure, hydrostatic oil film thickness platforms, oil pl

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