20.500.12556/RUL-138445 Obraba rezil na diskasti kosilnici pri različnih obremenitvah kosilnice Blade wear on a disc mower at different mower loads V okviru diplomskega dela smo ugotavljali vplive na obrabo rezil pri diskasti kosilnici. V poskus smo vključili nožke štirih različnih proizvajalcev ter ugotovili razlike v obrabi nožkov. Uporabili smo nožke podjetij Krone, Prillinger, Granit in Gerpol. Razlike v obrabi nožkov med proizvajalci so manjše od 1%. Rezultate obrabe nožkov smo dobili s tehtanjem pred in po poskusu, z vizualnim pregledom nožka pa smo ocenili, da se nožki na spodnji polovici obrabijo veliko bolj kot na zgornji. Ugotovili smo, da se nožki pri košnji slame veliko bolj obrabijo kot pri košnji trave. Prav tako se nožki proti koncu kosilnega grebena hitreje obrabljajo. Nožki se ob udarcu ob oviro varnostno umaknejo v notranjost diska ter tako poškodujejo na obeh straneh. Analizirali smo tudi kakovost košnje z obrabljenimi rezili. Poleg čistega odkosa je bil glavni mejnik košnje tudi čim manjši vnos zemlje v pokošeno travo. Z novimi- ostrejšimi nožki je bil odkos precej boljši kot pri nožkih, ki so že pokosili 10 ha košenine, saj je ostalo manj trave nepokošene. As part of the thesis, we investigated the effects on blade wear on a disc mower. We included blades from four different manufacturers in the experiment and found differences in pin wear. We used blades from Krone, Prillinger, Granit and Gerpol. Differences in pin wear between manufacturers are less than 1%. The results of the blade wear were obtained by weighing the blades before and after the experiment, and by visual inspection of the pin, we estimated that the blades on the lower half wear much more than on the upper half. We have found that the blades wear much more when cutting straw than when cutting grass. The blades also wear more quickly towards the end of the cutting ridge. The blades retreat inside the disc when they hit an obstacle, causing damage on both sides. We also analysed the quality of mowing with worn blades. In addition to a clean cut, the main milestone of mowing was to minimise the amount of soil in the cut grass. The new, sharper blades cut much better than the blades that had already cut 10 ha of grass, as less grass was left uncut. kmetijstvo košnja krma diskasta kosilnica nožki agriculture mowing feed disc mower blades true false false [M. Fidelj] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-07-21 07:15:29 2022-07-21 07:15:38 2022-09-15 04:16:46 0000-00-00 00:00:00 2022 0 Ljubljana 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 634.35:631.552(043.2) 204814 116090371 22740.pdf 22740.pdf 1 0C2203A521C5D93B808FD2E38C046E9F 3d3864083a57d3ec087290c6f633253efe33d85dd0e954a05ca5f0b7ffc1dc2d e89995aa-08b3-11ed-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=158778 Biotehniška fakulteta 0 0 0