Diagnostics of bucket wheel excavator discharge boom dynamic performance and its reconstruction

• Autorzy: Brkić A. D. , Maneski T , Ignjatović D. , Jovančić P. D. , Spasojević Brkić V. K.

Warianty tytułu

PL

Diagnostyka właściwości dynamicznych wysięgnika zrzutowego koparki kołowej oraz jego przebudowa

• Języki publikacji: EN

Abstrakty

EN

The paper focuses on an investigation into the possible causes of the bad dynamic performance of bucket wheel excavator C7OOS (BWE) discharge boom in the Kolubara opencast mine, Serbia. A discharge boom load carrying structure model was produced and its static and dynamic calculations were made by the finite element method (FEM). The model was then validated by the experimental method – vibration analysis. The set goals were achieved by the FEM result analysis, which were further confirmed in the experiment. The causes for discharge boom weak performance were established. The main operation problems were found in the inadequate design of the discharge boom tie(s) and the subsequent installation of a steering cabin. Possible discharge boom reconstructions were considered with a view to improving its operation performance. The selection of the reconstruction approach was limited by the technical and financial resources available to the machine users. After the completed reconstruction, the discharge boom improved operation performance was demonstrated in practice.

PL

W artykule badano możliwe przyczyny złych własności dynamicznych wysięgnika zrzutowego koparki kołowej C7OOS (BWE) pracującej w kopalni odkrywkowej Kolubara w Serbii. Do stworzenia modelu konstrukcji nośnej wysięgnika zrzutowego oraz przeprowadzenia obliczeń statycznych i dynamicznych wykorzystano metodę elementów skończonych (MES). Model został następnie zweryfikowany przy użyciu metody eksperymentalnej – analizy drgań. Wyznaczone cele osiągnięto poprzez analizę wyników MES, które zostały następnie zweryfikowane w badaniach doświadczalnych. Ustalono przyczyny słabego działania wysięgnika. Głównymi problemami eksploatacyjnymi okazały się być nieodpowiednia konstrukcja cięgien wysięgnika oraz montaż kabiny kierowcy. Aby poprawić charakterystyki pracy wysięgnika, rozważono możliwe opcje jego przebudowy. Wybór metody przebudowy ograniczały zasoby techniczne i finansowe użytkownika maszyny. Przebudowa dała poprawę charakterystyk pracy wysięgnika, co wykazano w praktyce.

Słowa kluczowe

EN

discharge boom; bucket wheel excavator; dynamic performance; vibration analysis

PL

wysięgnik zrzutowy; koparka kołowa; właściwości dynamiczne; analiza drgań

• Wydawca: Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne
• Czasopismo: Eksploatacja i Niezawodność
• Rocznik: 2014
• Tom: Vol. 16, no. 2
• Strony: 188--197
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Brkić A. D.

• lnnovation Center University of Belgrade Faculty of Mechanical Engineering KraljiceMarije 16,11120 Belgrade 35, Serbia

autor

Maneski T

• Department of Strength of Constructions University of Belgrade Faculty of Mechanical Engineering KraljiceMarije 16, 11120 Belgrade 35, Serbia

autor

Ignjatović D.

• Department of Mining Machinery University of Belgrade Faculty of Mining and Geology Đušina 7, 11120 Belgrade 35, Serbia

autor

Jovančić P. D.

• Department of Mining Machinery University of Belgrade Faculty of Mining and Geology Đušina 7, 11120 Belgrade 35, Serbia

autor

Spasojević Brkić V. K.

• Industrial Engineering Department University of Belgrade Faculty of Mechanical Engineering KraljiceMarije 16, 11120 Belgrade 35, Serbia

Bibliografia

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Uwagi

EN

This work is partially supported by the Ministry of Education and Science of Serbia grants nos. TR35040, TR35030 and E!6761.