Browsing by Subject "surface mining machines"

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Access status: Open Access ,
Porównanie postaci konstrukcyjnych koła zabierakowego pojazdów koparki wielonaczyniowej
(Wydawnictwa AGH, 2011) Rusiński, Eugeniusz; Smolnicki, Tadeusz; Przybyłek, Grzegorz
Driving centres of surface mining crawlers are high loaded elements. These elements are also strongly abraded. Therefore the mining machine requires frequent replacement of the wearied elements. Driving centre should allow for such replacement, and also meet certain strength requirements. Three versions of the wheel drive mechanism of the Bucket Wheel Excavator have been presented. Geometric forms of various construction solutions have been also shown in the paper. Apart from this, boundary conditions have been identified to carry out the numerical analysis with the use of FEM. Finally, advantages and disadvantages of proposed solutions have been presented.
Access status: Open Access ,
Zmiana obciążeń elementów tocznych w łożu kulowym zwałowarki wskutek zużycia odkształceniowego
(Wydawnictwa AGH, 2011) Smolnicki, Tadeusz; Stańco, Mariusz
Large size bearings with the monolithic and soft raceway are commonly used as a bearing for the main rotation of the basic surface mining machines body. The raceways of these bearings undergo a significant rolling, that changes the primary load distribution on the rolling elements of the bearing. The study presents the comparison of the rolling elements loading in the ZGOT 11500 conveyor for the new bearing as well as after five year bearing operation. The wear values are also presented. The loading distribution calculations were performed by the finite element method with the use of super-element type raceway-rolling element-raceway.
Access status: Open Access ,
Zwiększenie nośności łożysk wielkogabarytowych metodą korekcji bieżni
(2007) Smolnicki, Tadeusz; Przybyłek, Grzegorz; Stańco, Mariusz
Large-size bearings of machine's revolution structure of basic surface mining machines pertain to the most effort subassemblies of the load carrying structure, which is a reason of a high and eccentric loading, insufficient rigidity of the supporting subassemblies as well as disadvantageous working conditions. Usually the technical possibility of providing the suitable rigidity of supporting subassemblies does not exist. The raceway correction method bases on the suitable forming the raceway bottom groove and the lifting it in the more flexible areas and lowering in the more rigid areas. As a result of above treatment the loading compensation of particular rolling elements as well as significant decrease of maximal loadings that decide about failure was obtained. The use of such a treatment enables the significant increase of bearing life. The correction treatment of bearing raceway is described on the ZGOT 11500.100 dumping conveyor example, that is being built for BOT KWB Turów SA mine at present.