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Posodobitev sistema dvigalk za lokomotive
ID BOJANC, TILEN (Author), ID Nedeljković, David (Mentor) More about this mentor... This link opens in a new window

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PID: 20.500.12556/rul/548acb1c-77aa-4156-b793-73297be52d4f

Abstract
Diplomska naloga temelji na prenovi in posodobitvi krmiljenja pogonov dvigalk za dviganje lokomotiv v podjetju SZ – VIT. Potreba po obnovi krmilnega sistema se je pokazala ob nekontroliranem delovanju, ki je izpostavilo določene pomanjkljivosti sistema glede zanesljivosti, predvsem pa varnosti za ljudi in lokomotive. Pri spustu oziroma dvigu lokomotive ni deloval eden od pogonov dvigalk, kar je povzročalo nesimetrično premikanje dvigala in brez ukrepanja operaterja bi lahko prišlo do nesreče z večjo materialno škodo. Analiza dogodka je razkrila več pomanjkljivosti obstoječega krmilnega sistema. Brez avtomatizacije in nadzora delovanja pogonov je bilo zanesljivo in varno delovanje zelo odvisno od pozornosti operaterja. V okviru diplomske naloge je prikazan postopek izvedbe avtomatizacije delovanja obstoječega sistema dvigalk za dviganje lokomotiv, od načrtovanja projekta za izvedbo, izdelave krmilnih omar z ožičenjem energetskih in krmilnih elementov, izdelave programske opreme, testiranja signalov, do zagona in izdelave projekta izvedenih del. Za takšno avtomatizacijo je potreben programirljivi krmilnik (PLC), kjer se izvajajo logične operacije. Za določanje pozicije posameznih dvigalk so bili uporabljeni induktivni senzorji in končna stikala, ki so povezani s krmilnikom. Za varnost sistema pa je uporabljen varnostni rele, preko katerega se nadzira izklop tipkal za izklop v sili in zaščitni elementi pogonskih motorjev. S prenovo smo dosegli višji nivo varnosti in večjo zanesljivost delovanja sistema. Prav tako smo podaljšali življenjsko dobo strojnih elementov dvigalk, ki so bili pred prenovo veliko bolj izpostavljeni obrabi. Pri opisani avtomatizaciji smo zaradi omejenih finančnih sredstev v večji meri uporabili obstoječe krmilne in energetske stikalne elemente, ki so bili res že malo v letih, vendar še vedno tehnično brezhibni in v popolnosti opravljajo svojo funkcijo. Ob spremembi finančne situacije v prihodnosti bi lahko sistem še nadgradili.

Language:Slovenian
Keywords:krmilni sistem, avtomatizacija, projekt za izvedbo, projekt izvedenih del, induktivni senzorji, končna stikala, varnostni rele.
Work type:Bachelor thesis/paper
Organization:FE - Faculty of Electrical Engineering
Year:2015
PID:20.500.12556/RUL-72487 This link opens in a new window
Publication date in RUL:23.09.2015
Views:1621
Downloads:788
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Secondary language

Language:English
Title:Modernization of locomotive lifting jacks system
Abstract:
The thesis is based on the renewal and modernization of control system for lifting locomotives in the company SZ – VIT. The need for renewed control system has been seen during uncontrolled operation, which highlighted certain shortcomings in the system of reliability, in particular, the safety of people and the locomotives. At lifting or lowering locomotive, one of the motors didn't work properly, which caused asymmetric vertical movement of the locomotive and without operator's intervention, it could lead to accidents with major material damage. Analysis of the incident revealed several weaknesses of the existing control system. Without automation and control of the drives, reliable and secure operation were highly dependent on the operator's attention. The thesis shows the process of implementation of the existing automation system for lifting locomotives, from project planning for execution, manufacturing control cabinets with wiring of power and control elements, software development, testing signals, the start-up and design of the project works carried out . Such automation requires a programmable logic controller (PLC), which carries out logical operations. To determine the position of the individual jacks, we used inductive sensors and limit switches, which are connected to the PLC. For the safty of the system we used safety relay, which controlls emergency stop buttons and bimetal circuit breakers for motors. With the renovation we have achived a higher level of security and increased reliabilty of the system. We have also extended the life time of machine elements. Because of limited financial resources, we used many of old existing working elements, which were getting a bit over the years, but still performing their function. At the different financial situation in the future, the system can be upgraded.

Keywords:control system automation, project for execution, project of works carried out, inductive sensors, limit switches, safety relay.

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