Utjecaj konstrukcijskih rješenja na naprezanje kućišta jednostupanjskog reduktora

master's thesis

• Title (english): The impact of the structural changes on the gear unit housing stress
• Author: Daniel Miler
• Mentor: Dragan Žeželj (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2015-07-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U radu je istraživana opravdanost empirijskih izraza za pomoć u konstrukciji jednostupanjskih reduktora analizom modela metodom konačnih elemenata. Naime, danas se kućišta prijenosnika najčešće konstruiraju uporabom CAD-a, metode konačnih elemenata i alata za topološku optimzaciju. Potreba za empirijskim izrazima proizlazi iz činjenice da kvalitetni empirijski izrazi, korišteni orijentacijski u početnoj fazi, mogu skratiti vrijeme utrošeno za optimizaciju u kasnijim fazama. U svrhu istraživanja proračunat je i konstruiran prijenosnik prema postojećim empirijskim pravilima danim u programu „Reduktor“. Slijedeći korak sastojao se od variranja vrijednosti jedne od značajki dok su druge bile nepromijenjene. Pritom su promatrani utjecaji variranja debljina stjenki kućišta, debljina rubnih prirubnica, debljina ležajnih mjesta te rasporeda i dimenzija vijaka, na način da su mjereni pomaci i naprezanja na kritičnim mjestima relevantnim za određeni skup varijacija. Pojedinačno su objašnjeni utjecaji variranja svake od značajki te su rezultati prikazani tablično i grafički. Nakon analiziranja 20 variranih modela, analizirane su postojeće preporuke i ponuđene nove. Također je prikazana usporedba modela nastalih korištenjem starih i novih preporuka.

Abstract (english)

This thesis examines the justification of use of empirical expressions for help in the design of single-stage gearbox by analysing it using the finite element method. Nowadays, gearbox housings are usually constructed using CAD software, the finite element method and the topological optimization tools. The need for empirical expressions stems from the fact that high-quality empirical terms used in the initial design phase can shorten the optimization times in the later stages. For research purposes, test gearbox is calculated and designed using the existing parameters given in the "Reduktor" programme. The next step consisted of varying the value of one of the characteristics while others remained unchanged. The effects were observed while the thickness of the housing wall, the thickness of edge flanges, bearing thickness and the dimensions of screws were varied. The displacements and stresses on the critical areas relevant to a particular set of variations are measured and the influences of each of the variations on the other features are presented in tables and graphs. After the 20 models are varied, the existing recommendations are analysed and the new ones are offered. Also, a comparison of the models created using the old and new recommendations are made.

• Keywords: kućište; prijenosnik; zupčanici; analiza konstrukcije
• Keywords (english): gearbox housing optimization; gears; design strength analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:235:141689
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 13:56:47