Plinovite tvari kao sredstva za podmazivanje

undergraduate thesis

• Title (english): Gaseous substances as lubricants
• Author: Nikola Uzelac
• Mentor: Davor Ljubas (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

Plinovi imaju primjenu kao sredstva za podmazivanje baš poput konvencionalnih (kapljevitih) i krutih maziva, ali im je učestalost ipak manja zbog nekih od svojstva plinova. Primjerice, neki plinovi su skupi pa je samim time dostupnost i učestalost primjene manja, iako su ostala svojstva kvalitetna. Najčešći plin za podmazivanje je zrak, a neki od uređaja u kojima se koristi ova vrsta ležajeva su turbomotori, žiroskopi (gyroskopi) te precizni optički uređaji poput nekih teleskopa i mikroskopa. Naveden je i primjer stomatološke bušilice kao jednog od najpoznatijih uređaja u kojima se koristi zračni ležaj. U ovom radu prikazani su neki primjeri, opisana su svojstva plinova i način funkcioniranja kliznog ležaja te stvaranje hidrodinamičkog sloja u mazivom filmu.

Abstract (english)

Gases are used as lubricants just like conventional (liquid) and solid lubricants, but their frequency is still lower due to some of the properties of gases. For example, some gases are expensive, so their availability and frequency of application is lower, even though the other properties are of good quality. The most common lubricating gas is air, and some of the devices in which this type of bearing is used are turbomotors, gyroscopes and precise optical devices such as some telescopes and microscopes. An example of a dental drill is given as one of the most famous devices in which an air bearing is used. This thesis presents some examples, describes the properties of gases and the way the sliding bearing functions, as well as the creation of a hydrodynamic layer in the lubricating film.

• Keywords: Plinski ležaj; hidrodinamičko trenje; žiroskop (gyroskop); viskoznost; stomatološka bušilica
• Keywords (english): Gas bearing; hydrodynamic friction; gyroscope (gyroscope); viscosity; dental drill
• Language: croatian
• URN:NBN: urn:nbn:hr:235:665324
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2026-09-27
• Created on: 2024-09-19 21:25:36