Title Cilindarsko ulje brodskih dizelskih motora Title (english) Marine Diesel Engine Cylinder Oil Author Nikola-Nino Ivanković Mentor Jadran Šundrica (mentor)Committee member Jadran Šundrica (predsjednik povjerenstva)Committee member Žarko Koboević (član povjerenstva)Committee member Leo Čampara (član povjerenstva)Granter University of Dubrovnik Defense date and country 2019-09-25, Croatia Scientific / art field, TECHNICAL SCIENCES Abstract U ovom radu obrađena je tema cilindarskog ulja za podmazivanje sporohodnih brodskih dizelskih motora i tema analize cilindarskog ulja. Osnovni problem rada je trenje unutar cilindra koje čini i do 20% ukupnih gubitaka pri trenju unutar motora . Postavljena je radna hipoteza da je za razumijevanje podmazivanja u cilindru potrebno razumijevanje osnovne tribologije te uloga cilindarskog ulja. To se sastoji od razumijevanja teorije podmazivanja i pojmova tribologija te procesa trošenja i podmazivanja sa naglaskom na vrste podmazivanja. Onda se analizom kemijskog rezidualnog cilindarskog ulja dolazi do zaključaka o trošenju, podmazivanju i naprezanjima elemenata cilindra te da se na temelju analize može pospješiti djelovanje cilindarskog ulja. Nadalje, u radu je istražena klasifikacija cilindarskih ulja i bitna svojstva pri razmatranju djelotvornosti odabranog ulja. Nakon toga analizirane su funkcije cilindarskog ulja na temelju kojih su doneseni zaključci o potrebnim vrstama kemijskih aditiva za uspješno ispunjavanje funkcije. Poseban osvrt napravljen je na utrošak cilindarskog ulja i na sustav cilindarskog ulja koji je predstavljen na primjeru Alpha B&W sustava lubrikatora. Analizirani su djelovi sustava te način i uvjeti na koje sustav ostvaruje upravljanje i nadzor nad podmazivanjem cilindra te napredne značajke koje omogućavaju lakše rukovanje podmazivanjem. Središnji dio rada je tribološka analiza košuljice, stapa i stapnih prstenova. Analizirani su materijali izrade, svojstva i međusobne interakcije strojnih djelova te uloga cilindarskog ulja u brtvljenju, čišćenju, toplinskom prijenosu i podmazivanju. Prikazana je minimalna debljina sloja maziva uzduž košuljice za različita opterećenja te su na temelju toga doneseni zaključci o ostvarenoj vrsti podmazivanja. Stečena saznanja o tribologiji cilindra iskorištena su pri analizi rezidualnog cilindarskog ulja i donošenju opažanja stanju ulja i cilindarskih djelova na temelju kemijskog sastava te je demonstriran mehanizam optimizacije utroška cilindarskog ulja. Zaključno, sva stečena saznanja stavljena su u kontekst suvremenih zakonodavnih i tržišnih okvira na temelju čega je predstavljen budući razvoj brodskog sustava i posredno cilindarskog ulja.
Abstract (english) This paper discusses slow-speed marine diesel engine cylinder oil and the analysis of cylinder oil. The primary concern of the paper is cylinder friction which causes upwards of 20% of all internal diesel engine friction losses. A basic hypothesis is proposed, that the knowledge of basic tribology and understanding of cylinder oil significance are importan in understanding cylinder lubrication. That consists of basic lubrication theory, tribological terminology, the processes of wear and lubrication with special attention given to types of lubrication. Then, by means of drain cylinder oil chemical analysis, we can make conclusions about wear, lubrication and stress of cylinder components and that data can be used to adjust the cylinde oil settings. Further on, cylinder oil classification was examined along cylinder oil properties relevant for the effectivness of a chosen oil. After that, cylinder oil functions are analyzed. Based on that conclusions were made about the types of additives the cylinder oil needs to have in order to fulfill its function. Special attention was given to the cylinder oil feed rade and cylinder oil system. The paper used the Alpha B&W lubricator system as the example. System components were analyzed, as was the way the system achieves monitoring and control over cylinder lubrication and how advanced aspects of the system enable easier handling of cylinder lubrication. The paper focal point is liner, piston and piston ring tribology analysis. Materials, properties, and the interaction of different parts is analyzed, as is the role of the cylinder oil in sealing, cleaning, heat transfer and lubrication. Minimum oil film thicknes as a function of cylinder liner position is demonstrated for different loads. Based on that conclusions are drawn about the type of lubrication.The acquired understanding of cylinder tribology is applied to analize the chemical composition of drain cylinder oil. Observations are made about oil and component condition based on drain oil chemical composition and the mechanism of optimizing cylinder oil feed rate is demonstrated. In conclusion, the acquired understanding is put in to the contex of modern international martime laws and markets and conclusions are drawn about the future develpment of ships systems and cylinder oil.
Keywords
cilindarsko ulje
trenje
podmazivanje
tribologija
tribologija cilindra
analiza rezidualnog cilindarskog ulja
debljina sloja maziva
Keywords (english)
cylinder oil
friction
lubrication
tribology
cylinder tribology
drain cylinder oil analysis
lubricating film thickness
Language croatian URN:NBN urn:nbn:hr:155:084980 Study programme Title: Marine Engineering Type of resource Text File origin Born digital Access conditions Access restricted to students and staff of home institution Terms of use Created on 2019-10-02 08:24:42
