Konstrukcijsko rješenje prijenosnika zakretnog porivnog uređaja s proturotirajućim vratilima

undergraduate thesis

• Title (english): Design of a CRP POD's gearbox
• Author: Marko Čavara
• Mentor: Dragan Žeželj (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

Konstruiranje prijenosnika zakretnog porivnog uređaja s proturotirajućim brodskim vijcima koji su koaksijalno postavljeni jedan iza drugog predstavlja zanimljiv konstrukcijski problem s obzirom na potrebu za ugradnjom jednog vratila unutar drugog. U ovom radu, prijenosnik je konstruiran prema specifikacijama Brodarskog instituta za prijenosnik modela broda gdje ograničen ugradbeni prostor prijenosnika predstavlja dodatno ograničenje pri odabiru konstrukcijskog rješenja. U radu je prikazan i objašnjen proračun vratila i odabranih stožnika, kao i odabir ležajeva i načina uležištenja vratila. Konačno konstrukcijsko rješenje uključuje primjenu spiralnih stožnika, izvedbe pogonskog stožnika iz jednog dijela zajedno s vratilom, te koaksijalnih gonjenih vratila koji rotiraju u suprotnim smjerovima. Još jedna posebnost zadatka je traženi vijek trajanja uređaja od samo jednog sata intermitirajućeg rada što omogućuje primjenu manjih faktora sigurnosti čime se postižu manje dimenzije elemenata prijenosnika koji u konačnom rješenju ima masu od samo 1,034 kg.

Abstract (english)

Designing the gearbox for an azimuth thruster with contra-rotating propellers (CRP) that are coaxially placed one behind the other presents an interesting design problem when considering the need of fitting one shaft within the other. In this paper, the gearbox is designed according to specifications provided by Brodarski institut for a gearbox of a model ship where limited design space presents an additional restriction on the gearbox design. Calculations of shafts and selected bevel gears are presented in the paper, as well as the selection of bearings for shaft support. The final design solution includes the application of spiral bevel gears, a pinion shaft, and coaxial output shafts that rotate in opposite directions. Another particularity of the assignment is the required rated life of the gearbox of only 1 hour of intermitted work which allows the usage of smaller safety factors that reduce the size of gearbox elements. The gearbox in the final design solution has a mass of only 1,034 kg.

• Keywords: prijenosnik; zakretni porivni uređaj; proturotirajući brodski vijci; spiralni stožnici; koaksijalna vratila
• Keywords (english): gearbox; azimuth thruster; CRP; spiral bevel gears; pinion shaft; coaxial output shafts
• Language: croatian
• URN:NBN: urn:nbn:hr:235:895017
• 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: Open access; Embargo expiration date: 2023-09-27
• Created on: 2021-09-27 07:48:56