Transportna kolica za manipulaciju teškim teretima

master's thesis

• Title (english): Transportation wagon for manipulation of heavy loads
• Author: Bruno Cerovski
• Mentor: Milan Kostelac (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2018-12-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

U ovome radu obradilo se konstrukcijsko riješenje transportnih kolica za prijevoz teških tereta i manipulaciju njima. Omogućeni transport može biti autonoman odnosno neovisan o vučnom vozilu koristeći vlastiti izvor energije (trakcijske baterije) ili se može iskoristiti predviđeni prihvat rude i omogućiti transport nekim od raspoloživih vozila u pogonu (viličari, kamioni, itd.). Prvo se provjerila čvrstoća i krutost glavnih U profila nosive podkonstrukcije koji su konstruirani sa dovoljno velikom krutosti kako bi bila osigurana i ne prednapregnuta pozicija ostalih elemenata u sustavu. Isti je numerički proračun metodom konačnih elemenata validiran i programskim paketom ABAQUS, ali i analitičkim rješenjem iz područja nauke o čvrstoći. Te je dana grafička i tablična usporedba. Potom je proveden proračun pogona koji uključuje odabir motora, provjeru odabranog motora na pokretanje, proklizavanje, ali i provjera i odabir kočnice motora. Kako bi se omogućilo skretanje vozila određen je kinematički model spona za skretanje koje omogućuje prihvat hidrauličkog cilindra ili prihvat za rudu nekog od vučnih vozila. Sama transportna kolica još su opremljena škarastim mehanizmom za podizanje i mehanizmom za okretanje. Podizanje je izvedeno škarastim mehanizmom, a okretanje uz pomoć velikog okretnog ležaja sa unutarnjim ozubljenjem. Dan je i proračunski pregled svih krucijalnih elemenata uz prateće skice. Također za pokretanje hidrauličkog sustava škarastog mehanizma odabrani su cilindri te dan proračun istih na izvijanje, ali i proračun te odabir pogonskog motora hidrauličkog sustava. Iz razloga što bi sustav trebao imati svoj izvor energije, energija za pogon koristi se iz trakcijskih 48V DC baterija za koje je dan spektar upotrebe određenih članova sustava po ciklusu od 1h te je određen njihov kapacitet.

Abstract (english)

This thesis gives a look at a design of the transportation wagon for manipulation with heavy loads and provides a calculation example of its elements. The transport can be independent which is provided with its own traction battery set as an energy supply that drives electromotors for driving, hydraulic unit and an electromotor for rotation. In a case of energy loss or just transportation it can be used as a pulling wagon for some other transportation device/vehicle because it is equipped with a special hook for pulling. Firstly was main U300 beam of main chassis checked on strenght and stiffness. It was really important to get high stiffness level to lower the impact of chassis on other important components in the whole system. The whole process was made through numerical method called: "Finite Elements Method" calculated in MatLAB and afterwards validaed through ABAQUS program package and analitical method. Everything is also well documented with the few graphical comparation diagrams of the final results given for the each method. It was also necessary to check and choose electromotors for driving and check important variables such as (starting moment at a full load, traction of the empty vehicle and electromotor’s brake). In the other hand the transportation wagon needs to have possibility of steering. The steering system was calculated and the graph of a steering angle was provided in further documentation. The transportation wagon is also equipped with the lifting scissor mechanism and there is possibility to rotate the load using the platform installed on top of the slewing ring with an internal gearing system.

• Keywords: transportni uređaji; transportna kolica; teški tereti; hidraulički sustav; transport
• Keywords (english): transportation devices; transportation wagon; heavy loads; lifting; transport
• Language: croatian
• URN:NBN: urn:nbn:hr:235:912761
• 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 23:27:06