Development of a fan blower with a transverse current and influence of wall roughness on airflow

V diplomski nalogi smo zaradi problematike visokih cen prototipnega orodja za brizganje plastike različnih mas želeli ugotoviti, ali so 3D tiskani prototipi ustrezna alternativa tistim, ki so izdelani s prototipnim orodjem na področju izvajanja meritev, z namenom njihove uporabe v podjetjih in s tem prihranitve denarja. Po obstoječem kovinskem konceptu smo skonstruirali nov prototip, nato je sledil tisk na 3D tiskalniku, kjer smo poustvarili 3 različne hrapavosti prototipov. V merilnem laboratoriju smo pri vseh prototipih izmerili hrapavost notranje površine puhala ventilatorja in nato v merilni komori izvedli analize pretoka zraka. Opazovali smo tudi delovanje motorja ventilatorja, in sicer smo se osredotočili na njegovo porabo moči in število vrtljajev v odvisnosti od pretoka zraka. Pridobljene rezultate smo grafično prikazali in z analizo ugotovili, da je pretok zraka največji, prav tako je največja poraba moči motorja in število obratov najmanjše pri najbolj gladki notranji površini in obratno je pretok zraka najmanjši, najmanjša je poraba moči motorja in največje je število obratov pri najbolj grobi notranji površini puhala ventilatorja.In diploma thesis we wanted to determine whether 3D printed prototypes are a suitable alternative to those made with a prototype tool in measurement field for the purpose of their use in companies due to the problem of high prices of prototype tools for plastic injection of different masses. According to the existing metal concept we constructed a new prototype followed by printing on a 3D printer where we recreated three different roughnesses of prototypes. In the measuring laboratory we measured the roughness of the inner surface of the blower fan for all prototypes and then we analysed the air flow in the measuring chamber. Additionally, we have also observed the operation of the fan motor where we focused on its power consumption and the speed of the motor. The obtained results were plotted and analyse has shown that the air flow is the largest, as is the maximum power consumption of the engine and the number of turns minimum in the smoothest inner surface. Vice versa the air flow is the smallest, as is the minimum power consumption of the engine and the number of turns maximum in the course inner surface of the fan blower