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scientific master's theses
Istraživanje nosivosti klizno-valjnih parova
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2002. urn:nbn:hr:235:711870
Žeželj, Dragan
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Žeželj, D. (2002). Istraživanje nosivosti klizno-valjnih parova (Scientific master's theses). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:711870

Žeželj, Dragan. "Istraživanje nosivosti klizno-valjnih parova." Scientific master's theses, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2002. https://urn.nsk.hr/urn:nbn:hr:235:711870

Žeželj, Dragan. "Istraživanje nosivosti klizno-valjnih parova." Scientific master's theses, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2002. https://urn.nsk.hr/urn:nbn:hr:235:711870

Žeželj, D. (2002). 'Istraživanje nosivosti klizno-valjnih parova', Scientific master's theses, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 19 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:711870

Žeželj D. Istraživanje nosivosti klizno-valjnih parova [Scientific master's theses]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2002 [cited 2024 December 19] Available at: https://urn.nsk.hr/urn:nbn:hr:235:711870

D. Žeželj, "Istraživanje nosivosti klizno-valjnih parova", Scientific master's theses, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2002. Available at: https://urn.nsk.hr/urn:nbn:hr:235:711870

Metadata
TitleIstraživanje nosivosti klizno-valjnih parova
Title (english)Load carrying capacity research of sliding/rolling pairs
AuthorDragan Žeželj
MentorMilan Opalić (mentor)
Committee memberIvo Alfirević (predsjednik povjerenstva)
Committee memberMilan Opalić (član povjerenstva)
Committee memberJože Flašker (član povjerenstva)
VIAF: 66191048
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2002-11-19, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Universal decimal classification
(UDC)		621 - Mechanical engineering. Nuclear technology. Machinery
Abstract
Istraživanje u ovom radu odnosi se na područje temeljnih elemenata strojeva, poglavito nosivost podmazivanih klizno-valjnih parova. Pojam klizno-valjnog para odnosi se na dva opterećena elementa čije se površine ili dijelovi površina dodiruju sa ili bez prisustva maziva, te se međusobno relativno gibaju uz određeni odnos klizanja i valjanja. U uvodnom dijelu rada predstavljene su teorijske osnove dodira dvaju krutih tijela, te su sistematizirani tipovi kontakata i njima svojstveni tipovi oštećenja. Rupičenje i zaribavanje posebno su izdvojeni kao češći oblici trošenja kod klizno-valjnih parova. Sistematski su obrađene tri relevantne teorije podmazivanog dodira: hidrodinamička (HD), kojom je obrađen dodir dvaju idealno krutih tijela u prisustvu maziva za koje se uzima da ima karakteristike \Newtonovog fluida (\Newtonovo mazivo), te u izotermičkim uvjetima, elastohidrodinamička (EHD), kojom je obrađen dodir dvaju elastičnih tijela u prisustvu maziva čiji viskozitet zavisi o tlaku, te u izotermičkim uvjetima, termoelastohidrodinamička (TEHD), kojom su uz uvjete EHD teorije uključeni i utjecaji vezani uz promjenu temperature. Za svaku od navedenih teorija dana je uvodna analiza, te obrađeno područje primjene na jednodijelni klizni radijalni ležaj. U sklopu razmatranja EHD teorije, pored razrade za Newtonovo, obrađen je i slučaj ne-Newtonovog maziva, te je dat pregled češće korištenih reoloških modela kojima se opisuje veza između smičnog naprezanja i brzine smične deformacije. Rezultati primjene pojedine teorije predočeni su dijagramima za svaki relevantni čimbenik.
Abstract (english)
Research presented in this work deals with basic machine elements, especially with load carrying capacity of lubricated pairs with sliding and rolling motion involved. Such pair could be described as couple of loaded elements contacting over common surface in presence or without lubricant, in relative motion with some ratio of sliding and rolling. Introduction gives theoretical basics for rigid bodies contact, systematisation of such contacts and corresponding damages that usually occur. Two models of wear, pitting and scuffing, are outlined as commonly found at pairs mentioned. Three theories of lubricated contact are studied and presented: Hydrodynamic (HD), that deals with contact between two ideally rigid bodies in presence of Newtonian lubricant in isothermal environment, Elastohydrodynamic (EHD), that deals with elastic bodies, Newtonian or non-Newtonian lubricant whose viscosity depends on pressure and isothermal environment, Termoelastohydrodynamic (TEHD), for equal conditions as EHD but widen for thermal influence. Analysis was conducted for each theory mentioned, as well as study and appliance on simple journal bearing. In part of EHD study mostly used rheological models for non- Newtonian lubricants are shown. Results for each theory and corresponding factors of influence are presented in diagram form.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:711870
Study programmeTitle: Mechanical Engineering - mr.sc.
Study programme type: university
Study level: postgraduate
Academic / professional title: magistar znanosti (magistar znanosti)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-02-01 12:45:10