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Dissertations / Theses on the topic 'Spur gears'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Flodin, Anders. "Wear of spur and helical gears." Doctoral thesis, KTH, Machine Design, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2986.

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2

Wang, Jiande. "Numerical and Experimental Analysis of Spur Gears in Mesh." Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/879.

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The investigation of numerical methods for modelling the mechanism properties of involute spur gears in mesh, over the mesh cycle, forms the major part of this thesis. Gearing is perhaps one of the most critical components in power transmission systems and the transmission error of gears in mesh is considered to be one of the main causes of gear noise and vibration. Numerous papers have been published on gear transmission error measurement and many investigations have been devoted to gear vibration analysis. There still, however, remains to be developed a general Finite Element Model capable o

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3

Case, Sarah S. "Instantaneous Kinematic Analyses of Spur and Helical Gear Pairs Having Runout and Wobble Errors." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523908436619245.

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4

Wang, Jiande. "Numerical and Experimental Analysis of Spur Gears in Mesh." Curtin University of Technology, Department of Mechanical Engineering, 2003. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14464.

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The investigation of numerical methods for modelling the mechanism properties ofinvolute spur gears in mesh, over the mesh cycle, forms the major part of this thesis.Gearing is perhaps one of the most critical components in power transmission systemsand the transmission error of gears in mesh is considered to be one of the main causes ofgear noise and vibration. Numerous papers have been published on gear transmissionerror measurement and many investigations have been devoted to gear vibration analysis.There still, however, remains to be developed a general Finite Element Model capable ofpredi

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5

Ozturk, Fatih Mehmet. "Optimum Design Of Multistep Spur Gearbox." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606749/index.pdf.

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Optimum design of multistep gearbox, since many high-performance power transmission applications (e.g., automotive, space industry) require compact volume, has become an important interest area. This design application includes more complicated problems that are not taken into account while designing single stage gear drives. Design applications are generally made by trial and error methods depending on the experience and the intuition of the designer. In this study, using Visual Basic 6.0, an interactive program is developed for designing multistep involute standard and nonstandard spur gearb

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6

White, John. "The design and evaluation of polymer composite spur gears." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.647446.

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7

Sadeghi, Mohammad Hossain. "Precision forging axisymmetric shapes, straight and helical spur gears." Thesis, University of Birmingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.712700.

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8

Xinmin, Li. "Efficiency and wear properties of spur gears made of powder metallurgy materials." Doctoral thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187446.

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Powder metallurgy (PM) is usually used in manufacturing parts with complex geometries, such as gears and structural parts. The main attractions of PM are the high rate of material utilization, environmental friendliness of production, economic advantages (especially for complex geometries), and possibility of obtaining lighter components. To find a wide range of applications and compete with regular steel gears, PM gear transmissions should have good transmission efficiency and wear properties. Furthermore, they should have low contact noise and adequate surface fatigue properties. Because of

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9

Steward, Julian Holmes. "Elastic analysis of load distribution in wide-faced spur gears." Thesis, University of Newcastle Upon Tyne, 1989. http://hdl.handle.net/10443/804.

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The load distribution across the contact line(s) of spur gears is essential for the gear designer to be able to accurately stress gears for a given application. Existing gear standards (eg BS 436, AGMA 218 DIN 3990) use a thin slice (2D) model of the meshing gear teeth to estimate the contact line load distribution. This approach clearly fails to model properly teeth subjected to mal-distributed loads, since the buttressing effect of adjacent tooth sections tends to flatten the load distribution. Non-linear tooth modifications such as crowning and some forms of lead correction are also inadequ

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10

Wright, Zachary Harrison. "Loaded Transmission Error Measurement System for Spur and Helical Gears." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1230916489.

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11

Hwang, Jenq-Fong. "Advanced computer-aided design method on the stress analysis of internal spur gears." Connect to this title online, 1986. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1102453550.

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12

Milliren, Matthew Britt. "An Experimental Investigation of the Influence of Various Gear Steels on the Contact Fatigue Lives of Hard Ground Spur Gears." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1307622355.

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13

Sirichai, Seney. "Torsional properties of spur gears in mesh using nonlinear finite element analysis." Thesis, Curtin University, 1999. http://hdl.handle.net/20.500.11937/1378.

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This thesis investigates the characteristics of static torsional mesh stiffness, load sharing ratio, and transmission errors of gears in mesh with and without a localised tooth crack.Gearing is perhaps one of the most critical components in power transmission systems. The transmission error of gears in mesh is considered to be one of the main causes of gear noise and vibration. Numerous papers have been published on gear transmission error measurement and many investigations have been devoted to gear vibration analysis. There still, however, remains to be developed a general non-linear Finite

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14

Anichowski, Brian Jr. "An Experimental Investigation of the Effect of Spacing Errors on the Loaded Transmission Error of Spur Gear Pairs." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492619887370311.

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15

Raja, Hamzah R. I. "Condition monitoring of spur and helical gears using acoustic emission (AE) technology." Thesis, Cranfield University, 2008. http://dspace.lib.cranfield.ac.uk/handle/1826/11033.

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Condition Based Maintenance (CBM) philosophy has become widely accepted by most industries today as a key element in reducing operating cost, and increasing safety and life cycle costs within a environmentally friendly umbrella. One of the important keys to successful CBM is condition monitoring. The investigation reported in this thesis is centred on the application of Acoustic Emissions (AE) technology for condition monitoring of the operational spur and helical gears. Since the application of AE in gear condition monitoring is still under development, understanding the main source of AE dur

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16

Sirichai, Seney. "Torsional properties of spur gears in mesh using nonlinear finite element analysis." Curtin University of Technology, School of Mechanical Engineering, 1999. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=9473.

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This thesis investigates the characteristics of static torsional mesh stiffness, load sharing ratio, and transmission errors of gears in mesh with and without a localised tooth crack.Gearing is perhaps one of the most critical components in power transmission systems. The transmission error of gears in mesh is considered to be one of the main causes of gear noise and vibration. Numerous papers have been published on gear transmission error measurement and many investigations have been devoted to gear vibration analysis. There still, however, remains to be developed a general non-linear Finite

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17

Chitta, Sudeendra. "Elastohydrodynamic lubrication in spur gear and helical gear contacts." Thesis, KTH, Maskinkonstruktion (Avd.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-151246.

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The gears in a transmission are lubricated to prevent their premature failure as a result of pitting and wear on the tooth surfaces. Furthermore, the lubricant also limits the rise in surface temperature of the gears, which could otherwise lead to failure as a result of scuffing. The purpose of this thesis was to construct a fairly realistic theoretical lubrication model for spur and helical gears, the primary output parameters of this model being film thickness and flash temperatures, which would help in the identification of areas on the gear tooth surface prone to the aforementioned modes o

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18

Khaustov, Sergey. "Elastohydrodynamic lubrication and surface fatigue modelling of spur gears over the meshing cycle." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/95787/.

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This thesis presents a modern method to evaluate spur gears based on the transient elastohydrodynamic lubrication (EHL) emulation of the full meshing cycle, evaluating elastic stresses in the gear flanks, collecting the stress history and applying stress and strain-life methods to calculate fatigue parameters and cumulative fatigue damage, i.e. predicting the fatigue life taking measured surface roughness into account. The EHL model is formulated as the coupled system of the hydrodynamic Reynolds equation and the elastic deflection equation. These are solved simultaneously including the transi

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19

Srinivasan, Aravind. "DEVELOPMENT OF AN EXPERIMENTAL METHODOLOGY FOR SINGLETOOTH BENDING FATIGUE EVALUATION OF SPUR GEARS." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu158716942172768.

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20

Lim, Tiffany Wen Roe. "An Experimental Study on the Effects of Debris Damage on Scuffing Performance of Spur Gear Pairs." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523539700605647.

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21

Jaiswal, Preetish. "Influence of Various Surface Treatments on Power Losses of Spur Gear Pairs." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492685479305247.

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22

Irwin, Gary M. "Interactive 3-D computer-aided design of external spur gears cut by a hob." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/90943.

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An interactive program is presented which enhances the design of external spur gears cut by a hob. The program code calculates the geometry of an involute spur gear with trochoidal fillets and then uses the Graphical Kernel System (GKS), CADAM, and MOVIE.BYU to represent and display the gear. GKS, an international standard, is used to represent the gear in two dimensions; while the CAD/CAM system CADAM and the software package MOVIE.BYU accurately create wireframe geometric design models in three dimensions. Examples of the input parameters needed and each of the software packages in use are s

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23

Polly, Joseph H. "An Experimental Investigation of Churning Power Losses of a Gearbox." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1362745236.

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24

Klein, Mark Andrew. "An Experimental Investigation of Materials and Surface Treatments on Gear contact Fatigue Life." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243885964.

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25

Tharmakulasingam, Raul. "Transmission error in spur gears : static and dynamic finite-element modeling and design optimization." Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/5100.

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The gear noise problem that widely occurs in power transmission systems is typically characterised by one or more high amplitude acoustic signals. The noise originates from the vibration of the gear pair system caused by transmission error excitation that arises from tooth profile errors, misalignment and tooth deflections. This work aims to further research the effect of tooth profile modifications on the transmission error of gear pairs. A spur gear pair was modelled using finite elements, and the gear mesh was simulated and analysed under static conditions. The results obtained were used to

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26

Sun, Allen Y. "An Experimental Study of the Dynamic Response of Spur Gears Having Tooth Index Errors." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430749459.

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27

Sundaresan, Sivakumar. "Design optimization procedure using robustness for minimizing transmission error in spur and helical gears /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487780865411026.

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28

Govilkar, Siddhartha. "DEVELOPMENT OF A NEW TEST MACHINE FOR EXPERIMENTAL CONTACT FATIGUE INVESTIGATIONS OF SPUR GEARS." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555585277243502.

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29

Mann, Ishan Singh. "CONTACT FATIGUE EVALUATION OF SUPER HONED SPUR GEARS MADE OF AISI 4118 ALLOY STEEL." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562853272189986.

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30

Chaudhury, Kreteeka. "An Experimental Investigation of the Impact of Engineered Surface Processes on Efficiency of Spur Gears." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556553897979376.

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31

Brenneman, James W. "An Experimental Study on the Scuffing Performance of High-Power Spur Gears at Elevated Oil Temperatures." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374759993.

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32

Franzen, Justin Michael. "Contact Fatigue Evaluation of Ground and Chemically Polished Spur Gears Made of AISI 4118 Alloy Steel." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1370260045.

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33

Andersson, Martin. "An experimental investigation of spur gear efficiency and temperature : A comparison between ground and superfinished surfaces." Doctoral thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202990.

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This thesis focuses on reliability when testing gear efficiency and on how gear mesh efficiency can be increased without detrimental effects on the gears. Test equipment commonly used in gear research was analysed to identify important parameters for gear efficiency testing. The effect of the bearing model's load-dependent losses on gear mesh efficiency was also investigated. Two different surface finishes of gears, ground and superfinished, were investigated to determine how two different load levels during running-in affect gear mesh efficiency and changes in surface roughness. Efficiency an

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34

Milliren, Mark R. "AN EXPERIMENTAL INVESTIGATION INTO THE INFLUENCE OF VARIOUS ERRORS ON THE TRANSMISSION ERROR AND ROOT STRESSES OF SPUR GEARS." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1314209495.

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35

Ostiguy, Matthew James. "Experiment and Simulation of the Acoustic Signature of Fatigued-Cracked Gears in a Two-Stage Gearbox." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1328.

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This thesis focuses on the development of a health monitoring system for gearbox transmissions. This was accomplished by developing and understanding a two-stage gearbox computer model that emulates an actual gearbox test rig. The computer model contains actual gearbox geometry, flexible shafts, bearings, gear contact forces, input motor torque, output brake torque, and realistic gearbox imbalance. The gear contact force of each gear stage and the input bearing translational acceleration were the main outputs compared between a healthy gearbox and damaged gearbox computer model. The damage of

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36

Runštuk, Jiří. "Příprava výukové úlohy na experimentálním zařízení pro měření účinnosti ozubených převodů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230573.

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This diploma thesis is focused on the implementation of the educational role of the experimental station for measuring the effectiveness of gears. The proposed laboratory task "Experimental measurement of the effectiveness of gears" is intended to familiarize students with the basic principles of gears and especially highlight the issue of the effectiveness of gears. In this presented thesis, it is also suggested the possibility of expanding the educational use of the experimental station. This extension deals with vibration diagnostics of frequencies of gears.

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37

Petry-Johnson, Travis T. "Experimental investigation of spur gear efficiency." Connect to resource, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1209585550.

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38

Bommisetty, Venkata Satya Naga Karthik. "FINITE ELEMENT ANALYSIS OF SPUR GEAR SET." Cleveland State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=csu1337268681.

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39

He, Song. "Effect of Sliding Friction on Spur and Helical Gear Dynamics and Vibro-Acoustics." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1200371418.

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40

Udthala, Aparna. "Contact Fatigue of Spur Gear Operating Under Starved Lubrication Condition." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1619554628009744.

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41

Liu, Huaiju. "Lubricated contact analysis of a spur gear pair with dynamic loads." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/57917/.

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In the present research study, a comprehensive spur gear lubrication analysis has been carried out to understand the gear contact behaviour under lubrication conditions. The modelling works have been extended to consider the effects of thermal mechanical, non-Newtonian fluid, surface roughness, transient squeeze and dynamic load conditions. First, the elastohydrodynamic lubrication theory is studied and relevant numerical approaches are introduced. The reduced Reynolds equation technique is applied to deal with any potential "asperity contacts" or any other ultra-thin film situations. Those si

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42

Ding, Huali. "Dynamic wear models for gear systems." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1194025602.

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43

Masat, Mehmet. "Design And Implementation Of Hot Precision Forging Die For A Spur Gear." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608550/index.pdf.

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There is a strong need in forging industry to reduce waste of material, improve quality, and reduce cost of forgings. About 30% of the material is wasted during conventional closed-die forging. Therefore, in order to reduce the cost of forged products and to obtain near-net or net shape parts, new forging methods should be applied. Precision forging concept is a cost-effective way to produce net-shape or near-net shape components. In recent years, there has been an increased interest in the production of gears by the net-shape forging technique. This has specific advantages over the traditiona

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44

Harianto, Jonny. "The effect of manufacturing errors on predicted dynamic factors of spur gear." Connect to resource, 1995. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1144693877.

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Thesis (M.S.)--Ohio State University, 1995.<br>Advisor: Donald R. Houser, Dept. of Mechanical Engineering. Includes bibliographical references (leaves 99-100). Available online via OhioLINK's ETD Center

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45

Kelso, Michael Patrick. "The effects of quasi-steady loading on a virtual spur gear model." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/1236.

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With the projected growth of wind energy in the United States expected to account for 20% of the energy portfolio by 2030, it can be expected that wind turbines will not only increase in number, but also in size. This increase in size implies that internal components, such as the gearbox, will also increase to handle the higher loads. And given the high failure rates for gearbox components already in existence, one could expect more failure if nothing is done to improve reliability. It is well known that wind loading is not constant, rather it is random and ultimately causes fatigue loading. T

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46

Wang, Zhongwei. "Dynamic modelling of planetary gear systems for gear tooth fault." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/1284.

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Geared systems have been widely used in mechanical applications for more than a hundred years. A large range of literature has been published especially for spur/helical gear systems and the investigations into technical areas of spur/helical gears have been very well developed, including understanding of condition monitoring systems, diagnostic and prognostic methods. However, there is a lack of understanding on the general dynamic behavior of planetary gear systems with tooth faults. Planetary gears are normally used as effective power transmission elements with high power to weight/volume r

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47

Nóbrega, Luiz Henrique Melo Silva. "Desenvolvimento de uma estratégia de medição, baseada em nurbs, para determinação do desvio total de perfil (fα) de engrenagens cilíndricas de dentes retos usando MMCs". Universidade Federal da Paraíba, 2016. http://tede.biblioteca.ufpb.br:8080/handle/tede/8961.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2017-05-23T14:51:55Z No. of bitstreams: 1 arquivototal.pdf: 7468223 bytes, checksum: d6989870b5f353c5592a40ac6ebb0333 (MD5)<br>Made available in DSpace on 2017-05-23T14:51:55Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 7468223 bytes, checksum: d6989870b5f353c5592a40ac6ebb0333 (MD5) Previous issue date: 2016-05-07<br>For many years the power transmission and movement for gears has been an important technology in the automotive, mechanical and aeronautical industries, justifying the considerable number of research carried out under the q

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48

Lai, Liang-chieh, and 賴良傑. "Design of Shifted Spur Gears." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/41413309975445933836.

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碩士<br>逢甲大學<br>材料與製造工程所<br>93<br>Shifted gears are generated by standard gear generating tools with gear pitch circle intersect or away from the tool pitch line. Therefore, a pair of mating pinion and gear has different addendum/dedendum. Shifted gears may be employed in one of the occasions, (a) to avoid undercutting, (b) to obtain lager contact ratio, (c) to fit specific center distance in a gear train, and (d) to increase the tooth root strength. However, when gear engineers try to improve one factor by the using of shifted gears, usually, other factors become worse. So, tedious try-and-erro

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49

Huang, Kuo-Jao, and 黃國饒. "DYNAMIC ANALYSIS OF SPUR GEARS." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/69173614929581419011.

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博士<br>國立交通大學<br>機械工程系<br>91<br>With an increasing demand for high performance machinery, dynamic analysis for gears has become important. Instead of discrete mass-spring models, this study presents a dynamic stiffness method to analyze spur gear dynamics. The dynamic responses of single gears and gear pairs are investigated. This continuum approach takes into account time-varying stiffness and mass matrices due to moving meshing points. Firstly, using a dynamic stiffness method, dynamic analysis for rotating nonuniform cross-section Euler beams is carried out. Longitudinally stiffen

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50

Yang, Chung-How, and 楊中豪. "Parameterized Stress Analysis of Spur Gears." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/11803172520934353169.

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碩士<br>國立中正大學<br>機械工程所<br>96<br>The stress analysis with CAD/CAE software is generally used nowadays for the contact analysis of a gear pair. The software package ANSYS® is chosen as the analytic platform to analyze the contact and bending stresses of a spur gear pair in this thesis. The discrete tooth profile data is first processed by the proposed points-added and points-deleted methods. The gear model and ANSYS® scripts are built by the Mathematica® program, and the nodes and meshes of the spur gears are auto-generated in the preprocessing software HyperMesh®. The simulated results of the co

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