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Dissertations / Theses on the topic 'A running gear'

Author: Grafiati
Published: 28 May 2022
Last updated: 18 July 2025

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1

Sjöberg, Sören. "Influence of running-in on gear efficiency." Doctoral thesis, KTH, Maskinelement, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152699.

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The general trend in gear industry is an increased focus on gear transmission efficiency. This thesis focuses on the understanding of how different gear manufacturing methods – particularly the contribution of the running-in process – affect the surface characteristics and friction response, with the purpose of increasing gearbox efficiency. The thesis consists of a summary and five appended papers. The research hypothesis in paper A and paper B was that the dry elastic contact area ratio is a descriptive parameter for the contact condition. Paper A deals with the influence of manufacturing me
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2

Sjöberg, Sören. "On the running-in of gears." Licentiate thesis, KTH, Machine Elements, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12750.

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<p>The general trend in gear industry, today, is an increased focus on gear transmission efficiency. Gear transmission efficiency losses arise from loaded and unloaded gear contacts, seals, lubricant and bearings. One way of minimising the losses is to lower the lubricant viscosity. This will reduce the speed dependent losses. However, the load dependent losses might increase. To avoid this, the ratio between lubricant film thickness and surface roughness must be maintained, which can be fulfilled by producing smoother gear surfaces. As a starting point for this realisation process, the presen
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3

Paliwal, M. C. "Running-in and scuffing failure of marine gears." Thesis, Bucks New University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376640.

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4

Kahnert, Pascal. "Development and Optimisation ofInnovative Running Gear Conceptsfor an Ultra-High-Speed Train." Thesis, KTH, Spårfordon, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-180438.

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Since the last ten to 15 years, railway operators have to face new challenges which are an increased demand on comfort and high safety requirements, increased energy costs and the high competitive market situation. German Aerospace Center, DLR is designing a novel concept of an ultra-high-speed train with distributed propulsion system—the Next Generation Train (NGT). It consists of two Power units and eight powered intermediate cars. The intermediate cars are characterised by powered single-wheel single running gears supporting the low-floor concept within the whole train, re-sulting in both e
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5

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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6

Карашевський, Юрій Володимирович, та Yuriy Volodymyrovych Karashevsky. "Проект дільниці ремонтного цеху для технічного обслуговування та ремонту ходової частини автомобіля ВАЗ-2115 з дослідженням характеристик підвіски в різних експлуатаційних режимах". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2020. http://elartu.tntu.edu.ua/handle/lib/33542.

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Роботу виконано на кафедрі автомобілів Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України. Захист відбудеться 21 грудня 2020 р. о 15:00 годині на засіданні екзаменаційної комісії № 10 у Тернопільському національному технічному університеті імені Івана Пулюя за адресою: 46001, м. Тернопіль, вул. Текстильна, 28, навчальний корпус № 9, ауд. 106.<br>В кваліфікаційній роботі розроблено технологію технічного обслуговування та ремонту ходової частини автомобіля ВАЗ-2115, а також досліджено характеристику підвіски в різних експлуатаційних режима
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7

Jönsson, Per-Anders. "Modelling and laboratory investigations on freight wagon link suspensions with respect to vehicle-track dynamic interaction." Licentiate thesis, KTH, Aeronautical and Vehicle Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-395.

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<p>The link suspension is the most prevailing suspension system for freight wagons in central and western Europe. The system design is simple and has existed for more than 100 years. However, still its characteristics are not fully understood. This thesis emphasizes freight wagon dynamics and comprises three parts:</p><p>In the first part a review of freight wagon running gear is made. The different suspension systems are described and their advantages and disadvantages are discussed. The review covers the running gear standardized by UIC and the conventional so-called three-piece bogie. Addit
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8

Auer, Wolfgang. "Fahrstabilität und Bogenfahrt von Schienenfahrzeugen mit drei gesteuerten Radsätzen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1096877685281-77833.

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Ein Schienenfahrzeug erzeugt geringe Gleiskräfte und geringen Verschleiß an Rädern und Schienen, wenn sich die Radsätze im Gleisbogen radial einstellen. In dieser Arbeit wird untersucht, welche Bedingungen für ein dreiachsiges Fahrwerk mit radialer Einstellbarkeit gelten, damit es möglichst stabil fährt. Außerdem wird es mit einem konventionellen dreiachsigen Fahrwerk bezüglich stabiler Fahrt und Verhalten im Bogen verglichen. Zusätzlich werden angetriebene Radsätze erfasst. In der Auslegungsphase eines Fahrzeuges kommt es darauf an, die wesentlichen Parameter zu analysieren und die optimalen
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9

Knapec, Tomáš. "Jeřábová kočka mostového jeřábu 32 t." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232169.

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This master’s thesis is the design development of crane trolley, which is used to manipulate with scrap material. The target of this thesis is to develop a technical report including calculations of running and lifting gear, strength calculation of frame of trolley and drawings containing assembly of crane trolley and assemblies of running and lifting gear. Desired parameters of this trolley are maximum load capacity 32 000 kg, lifting height of 11 m, working lifting speed up to 10 m/min and working running speed up to 50 m/min.
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10

Auer, Wolfgang. "Fahrstabilität und Bogenfahrt von Schienenfahrzeugen mit drei gesteuerten Radsätzen." Doctoral thesis, Technische Universität Dresden, 2003. https://tud.qucosa.de/id/qucosa%3A24380.

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Ein Schienenfahrzeug erzeugt geringe Gleiskräfte und geringen Verschleiß an Rädern und Schienen, wenn sich die Radsätze im Gleisbogen radial einstellen. In dieser Arbeit wird untersucht, welche Bedingungen für ein dreiachsiges Fahrwerk mit radialer Einstellbarkeit gelten, damit es möglichst stabil fährt. Außerdem wird es mit einem konventionellen dreiachsigen Fahrwerk bezüglich stabiler Fahrt und Verhalten im Bogen verglichen. Zusätzlich werden angetriebene Radsätze erfasst. In der Auslegungsphase eines Fahrzeuges kommt es darauf an, die wesentlichen Parameter zu analysieren und die optimalen
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11

Jönsson, Per-Anders. "Dynamic Vehicle-Track Interaction of European Standard Freight Wagons with Link Suspension." Doctoral thesis, KTH, Järnvägsteknik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4461.

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The link suspension is the most prevailing suspension system for freight wagons in Central and Western Europe. The system design is simple and has existed for more than 100 years. However, still its characteristics are not fully understood. This thesis investigates the dynamic performance of freight wagons and comprises five parts: In the first part a review of freight wagon running gear is made. The different suspension systems are described and their advantages and disadvantages are discussed. The second part focuses on the lateral force-displacement characteristics of the link suspension. R
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12

Mao, Kun. "The performance of dry running non-metallic gears." Thesis, University of Birmingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526751.

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To evaluate how much power a non-metallic gear (the term non-metallic gear is used to cover both polymer and composite gears in this thesis) can transmit, it is necessary to investigate both the thermal fatigue strength and wear resistance of the gear. This thesis presents an investigation into polymer and composite gear strength and wear together, focusing particularly on the thermal behaviour of acetal gears. A literature survey is presented, which includes the design, performance and thermal behaviour of non-metallic gears. A novel test rig has been successfully designed and developed for t
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13

NAKHJIRI, MINOO. "Study of running-in of spiral bevel gears." Thesis, KTH, Maskinkonstruktion (Inst.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143628.

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Hand held power tools have enabled craftsmen and skilled workers in general to increase their productivity while cutting, assembling, and grinding. Atlas Copco Tools has been at the vanguard of ever increasing product performance in hand held power tools. One product module which has been thoroughly studied is the bevel gear transmissions present in Atlas Copco angle head nut runners. For these gears a large variation of service life has been observed due to difference in the running procedures and different service intervals.To extend the service life of nut runners, Atlas Copco Tools has sta
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14

Sosa, Mario. "Running-in of gears - surface and efficiency transformation." Doctoral thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214983.

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With ever shorter development times and market demands on overall system performance such as efficiency, reliability and low maintenance, accurate predictive tools are necessary and gear drives prove to be no exception. All these characteristics have an impact on a process which has remained a riddle: running-in. Even though no consensus on a definition of this phenomena is readily available, this thesis examines efficiency, surface roughness and simulation through the optics of running-in. Geared transmissions are known for their formidable efficiency and their extreme reliability. However, w
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15

Sosa, Mario. "Running-in of gears from a surfacetransformation and efficiency point of view." Licentiate thesis, KTH, Tribologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173828.

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Requirements today for machines have moved beyond functionality intoefficiency and reliability, gears are no exception. The presented work focuseson the analysis of the measurement, evolution and effect of running-in on geardrives from a surface roughness and efficiency point of view. With no consen-sus on a definition or observation of running-in of gear drives, measurementsof both efficiency and surface transformation during the predefined running-inis explored. A verified methodology on how to separate form, waviness androughness is presented. Two finishing methods, namely generation ground
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16

Andersson, Martin. "Churning losses and efficiency in gearboxes." Licentiate thesis, KTH, Tribologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152914.

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Efficient transmissions systems are key to producing competitive motor vehicles that have a smaller environmental impact. Gears are the main components in vehicle transmissions and although they are already highly efficient, there is still room for improvement. In this study, the focus falls on the lubricant used to create separating films between gears and todissipate heat. When driving, the gears churn this lubricant, giving rise to power losses that are related to the amount and properties of the lubricant. However, any attempt to reduce these losses must not compromise the required lubrica
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17

Lin, Shih Yung, and 施永林. "A Study for the Satisfaction at Driver's Training of Running Gear under 20 Tons of Boat in Taiwan." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/32174789589738015596.

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碩士<br>國立高雄海洋科技大學<br>漁業生產與管理研究所<br>97<br>The constant improvement of national income and compatriot's quality of the life, going sightseeing has already become one of the national life center in Taiwan; And also with the improvement and adding the four sides of Taiwan and is surrounded by sea the environmental attitude of geography of the national living standard of Taiwan, a lot of people yearn for obtaining the motive force boat driving license under 20 tons of the second passport, in order to promote and improve its one's own recreation living standard even more. So this research hopes in te
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18

Chen, Huai-Shan, and 陳淮山. "Fatigue Test for Tooth Root Bending Strength of Powder Metallurgy Gears and Running Verification Test." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/20597408189319739105.

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碩士<br>國立中央大學<br>機械工程研究所<br>100<br>Powder　metallurgy　technology　or　PM　technology　plays　an　important　role　in　gear　manufacturing　in　recent　years　because　it　is　cost-saving　and　efficient　to　produce　small　gears　with　complex　shapes.　　However,　　the　tooth　root　fatigue　strength　of　the　PM　gear　is　reduced　because　it　is　porous.　　In　order　to　use　the　PM　gear　for　the　power　transmission,　　it　is　necessary　to　explore　the　tooth　root　fatigue　strength　of　the　PM　gear　for　gear　design. 　　In　order　to　determine　the　tooth　root　fatigue　strength　of　the　PM　gear,　　a　fatigue　test　for　single　tooth　of　a　spur　gear　was　conducted
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