Konstrukcija nosača gornjeg kombiniranog ležaja hidrogeneratora

master's thesis

• Title (english): Design of hydro generator upper combined bearing bracket
• Author: Jure Perić
• Mentor: Nenad Kranjčević (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2018-07-11, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

U radu je prikazano konstruiranje i proračun nosača gornjeg kombiniranog ležaja. Opisane su vrste hidrogeneratora s obzirom na položaj vratila rotora te smještaj i glavne funkcije gornjeg nosača u vertikalnom hidrogeneratoru. Prikazana je položaj segmenata kombiniranog ležaja na tijelo gornjeg nosača te položaj i veličina radijalne i aksijalne sile koja djeluju na nosač. Opisano je tehnologično oblikovanja nosača i ležajnog lonca s aspekta postupka zavarivanja, strojne obrade i montaže svih dijelova koje je potrebno spojiti na nosač. Također, zbog manjih dimenzija transporta nosača, konstruirane su rastavljive ruke uporabom vijaka te je izračunato naprezanja u vijcima pomoću softvera za proračun vijčanih spojeva. Pomoću metode konačnih elemenata provedena je analiza naprezanja i pomaka za tri različita uvjeta rada hidrogeneratora a prethodno je dana verifikacija tetraedarskih paraboličnih konačnih elemenata. Na osnovu provedenog oblikovanja i proračuna napravljena je tehnička dokumentacija za rastavljivu i nerastavljivu izvedbu prema kojoj će nosač biti izrađen.

Abstract (english)

This paper presents the construction and calculation of upper bearing bracket. Hydrogenerators, regarding position of the rotor shaft, and accommodation and main functions of the upper bracket in vertical hydrogenerators, are described. The position of the segments of the combined bearing on the upper support body is shown, also the position and size of the radial and axial forces acting on the carrier. Technological design of the bracket and bearing pot is described from the point of view of welding, machining and assembly of all the parts that will be connected to the bracket. Also, due to the smaller dimensions of the bracket carriage, disassembled hands were constructed using screws and, using software to calculate screw connections, the strain in screws was calculated. Analysis of stress and displacement for three different work conditions of the hydrogenerator was carried out with help of finite element method, but tetrahedral parabolic finite elements were verified before. On the basis of the design and calculating prepared the technical documentation for separable and inseparable embodiment for which the bracket will be made.

• Keywords: hidrogenerator; nosač ležaja; tehnologično oblikovanje; krutost; čvrstoća
• Keywords (english): hydrogenerators; bearing bracket; technological design; stress; displacement
• Language: croatian
• URN:NBN: urn:nbn:hr:235:342102
• 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; Embargo expiration date: 2020-07-13
• Created on: 2019-05-22 22:44:44