Failure reasons investigations of dumping conveyor breakdown

• Autorzy: Rusiński E. , Czmochowski J. , Moczko P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main purposes of the paper are to discuss designing and exploitation problems of machines used in strip mines and investigation of its reasons based on steering frame brake-down of the dumping conveyor. Design/methodology/approach: Numerical and experimental approach was used to investigate reasons of the break-down of the dumping conveyor. Numerical simulations based on the finite element method were used. Fractographic and microscopic evaluation and chemical analysis, were used to perform material evaluations. The objectives are achieved by analysis of the numerical simulations results of the broken part of machine and data coming from material evaluations. Based on the mentioned results conclusions concerning results of the failure were given. Additionally the new design of the steering frame half-shafts systems was discussed. Findings: The causes of break-down of the steering frame of dumping conveyor were found. Designing and manufacturing problems were the main reasons of the failure. The half shafts systems in undercarriages of the open pit machines are prone to break-downs. They require detailed analysis to be successfully implemented into steering system. Recommendations for the single shaft system are given in the paper. Research limitations/implications: in the half-shaft undercarriage system, the friction in the supporting areas limits horizontal forces acting on safetying. Investigations of the static and sliding friction coefficients should be performed to estimate correct forces and optimal designing rules. Practical implications: The study provides practical implication into designing of half-shafts undercarriage systems and their safetyings. Discussed design of the safetying should be redesigned or the half-shaft system should be changed into one shaft design. Originality/value: The paper provides information backed by evaluation and test results, stating the nexus of causes of the dumping conveyor failure. The experimental and numerical approaches show relationship between designing and manufacturing process of machines. This can be helpful for the designers and researchers looking for reasons, methods of investigations or how to prevent failures of similar machines.

Słowa kluczowe

EN

modelling; CAD/CAM; constructional design; metallography

PL

modelowanie; CAD/CAM; projektowanie konstrukcji; projektowanie inżynierskie; metalografia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 23, nr 1
• Strony: 75--78
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Rusiński E.

autor

Czmochowski J.

autor

Moczko P.

• Institute of Machines Design and Operation, Wroclaw University of Technology, ul. Lukasiewicza 7/9, 51-370 Wroclaw, Poland,

Bibliografia

• [1] J. Brändlein, Elastische Verformungen der Gehäuse beeinflussen die Wälzlagerung. Maschinenmarkt 56/1980.
• [2] Ch.R. Brooks, A. Choudhury, Failure analysis of engineering materials. New York, McGraw-Hill, 2002.
• [3] R.D. Cook, D.S. Malkus, M.E. Plesha, R.J. Witt Concepts and Applications of Finite Element Analysis, 4th Edition, John Willey, New York 2001.
• [4] DIN/22261-2 - Bagger Absetzer und Zusatzgeräte in Braunkohlentagebauen, Teil 2: Berechnungsgrundlagen.
• [5] J.M. Dulieu-Barton, M.J. Brennan, Damage assessment of structures Proceedings of the 5th International Conference on Damage Assessment of Structures (DAMAS 2003), Southampton, UK, 1st to 3rd July 2003.
• [6] W. Durst, W. Vogt, Schaufelradbagger, Trans Technology Publications 1986.
• [7] I-DEAS Master Series, Mechanical CAE/CAD/CAM Software, Structural Dynamics Research Corporation, 2000 Eastman Dr., Milford, OH 45150.
• [8] E. Rusiński, J. Czmochowski, T. Smolnicki, Advanced Finite Element Method for Load-carrying Structures of Machines (in Polish), Press PWr., Wroclaw 2000.
• [9] O.C. Zienkiewicz, R.L. Taylor, The Finite Element Method 2: Solid Mechanics 5th edition, Butterworth-Heinemann, 2000.
• [10] J. Schijve Fatigue of structures and materials. Dordrecht [u.a.] : Kluwer Academic, 2001.
• [11] B. Schlecht, Modern Drive Technology for the Mining an. Minerals Industry. Bulk Solids Handling in Surface Mines, pp. 195-202 Trans Technology Publications, Clausthal-Zellerfeld 2000.
• [12] C.W. Wegst Stahlschlüssel. Verlag Stahlschlüssel Wegst. Marbach 2001.
• [13] E. Rusinski, J. Czmochowski, P. Moczko, Numerical an: experimental analysis of a mine's loader boom crack, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 273-276.
• [14] Y. Zhang, D. Redekop, Shell element simulation of the push method of tube bending, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 301-304.
• [15] E. Rusinski, A. Kopczynski, J. Czmochowski, Tests of thin-walled beams joined by spot welding, Journal of Materials Processing Technology 157-158 (2004) 405-409.