INFLUENCE OF THE DYNAMIC/TECHNOLOGICAL FACTORS ON THE LIFE EXPECTANCY OF THE EXCAVATION EQUIPMENT IN OPEN CAST MINES

Florin VÎLCEANU, Ancuța Mirela RADU, Stela DINESCU, Ovidiu Bogdan TOMUȘ, Alexandru Robert CIOCLU

Abstract


The paper studies the effect that the dynamic factors have on the estimation of the service life of a bucket wheel excavator. Starting from the design standards, it was found that by ignoring the dynamic factors, numerous cracks appear in the structure of the equipment. It is thus necessary to combine standards with measurements of mechanical stresses using strain gauges, both in static and dynamic mode during excavation. Based on this approach, a case study was conducted on an ERc1400-30/7 excavator, for which the specific deformations have been established in dynamic and static mode. Finally, an approximate value for the dynamic factor was obtained and the durability curves were traced, showing the influence of the dynamic factor on the S-N curve.

Full Text:

PDF

References


*** DIN 22261-2: Excavators, spreaders and auxiliary equipment in opencast lignite mines - Part 2: Calculation principles.

Rasper, L. The bucket wheel excavator: development-design-application. Clausthal-Zellerfeld, Germany: Trans Tech Publications.

Brînaș, I., Andraș, A., Radu, S.M., Popescu, F.D., Andraș, I., Marc, B.I., Cioclu, A.R. Determination of the Bucket Wheel Drive Power by Computer Modeling Based on Specific Energy Consumption and Cutting Geometry. Energies 14, 3892, 2021.

Popescu, F.D., Radu, S.M., Andras, A., Brinas, I.K. A grafo-numeric method of determination of the operation power of the rotor of EsRc-1400 bucket wheel excavator using computer simulation in SolidWorks. MATEC Web Conf. 290, 04007, 2019.

Alenowicz, J., Huss, W. Fatigue Life Estimation in Bucket-Wheel Excavators Maintenance. Proceedings of the 13th International Scientific Conference. DOI: 10.1007/978-3-319-50938-9_2.

Rusiński, E., Czmochowski, J. Selected Problems in Designing and Constructing Surface Mining Machinery. FME Transactions, 40, 153-164, 2012.

Vîlceanu, F. The study of life’s duration for equipment the extraction and depositing in deposits, used in careers from the Oltenia Basin. Ph.D. Thesis, University of Petrosani, Romania, 2018;

Pietrusiak, D., Moczko, P., Smolnicki, T., Rusiński, E. Identification of low cycle dynamic loads acting on heavy machinery. Procedia Engineering, 199, 254-259, 2017.

Pietrusiak, D. Evaluation of large-scale load-carrying structures of machines with the application of the dynamic effects factor. Eksploatacja I Niezawodnosc-maintenance and Reliability, 19, 542-551, 2017.

Rusinski, E., Moczko, P., Pietrusiak, D. Low frequency vibrations of the surface mining machines caused by operational loads and its impact on durability. Proceedings of International Conference on Noise and Vibration Engineering (ISMA2014), Leuven, Belgium, 683-694, 2014.

Moczko, P., Pietrusiak, D., Rusiński, E. Material handling and mining equipment: International standards recommendations for design and testing. FME Transactions, 46, 291-298, 2018.

Ghindea, C., Crețu, D., Cruciat, R., Giumanca, A. O analiza asupra incercarii dinamice a podurilor (A review on the dynamic testing of the bridges). A XX-a Conferință Națională cu participare internațională comportarea “in situ” a construcțiilor, Brașov, România. 2014.

*** STAS 12504/86

Lee, YL., Pan, J., Hathaway, R.B., Barkey, M.E. Fatigue Testing and Analysis. Butterworth–Heinemann, 2005.

McKelvey, S.A., Lee, YL., Barkey, M.E. Stress-Based Uniaxial Fatigue Analysis Using Methods Described in FKM-Guideline. J Fail. Anal. and Preven. 12, 445–484 (2012).

Brown, T.H. Marks’ Calculations for Machine Design. McGraw-Hill, 2005.

Pedersen, M.M. Introduction to Metal Fatigue. Department of Engineering, Aarhus University. Denmark. 91 pp. Technical report ME-TR-11. 2018.

Contract subsecvent de prestari service nr. 888/CEOSM/07.05.2020, în baza acordului cadru nr. 1659/CEOSM/19.08.2019 – 37 utilaje tip ERc-1400-30/7. „Servicii de expertizare stare tehnică utilaje de carieră privind prelungirea duratei normale de funcționare, conform HG 2139/2004”. Universitatea din Petroșani, Uzitmet Industry, I.C.S.I.T.P.M.L-Craiova.

*** Fișă oțel de uz general pentru construcții. I.C.C.M, 1983.

*** STAS 500/2-80.

Popescu, F.D. Ways of controlling transport capacity variation of belt conveyors. In Proceedings of the 9th WSEAS International Conference Automation and Information (ICAI’08), Bucharest, Romania, 24–26 June 2008; pp. 120–123.

Andras, A., Brînaș, I., Radu, S.M., Popescu, F.D., Popescu, V., Budilică, D.I. Investigation of the Thermal Behaviour for the Disc-Pad Assembly of a Mine Hoist Brake Using COMSOL Multiphysics. Acta Tech. Napoc.-Ser. Appl. Math. Mech. Eng. 64, 227–234, 2021.


Refbacks

  • There are currently no refbacks.


JOURNAL INDEXED IN :