Engineering Transactions, 65, 3, pp. 523–538, 2017

Strength Analysis of Typical Koepe Pulley Constructions Applied in Mine Hoisting Installations

Stanisław WOLNY
AGH University of Science and Technology
Poland

Bogusław ŁADECKI
AGH University of Science and Technology
Poland

A large number of hoisting installations equipped with Koepe pulleys are presently operating in Polish mines. In many instances, cracks of fatigue character occur in those Koepe pulley constructions. Conducting periodic repairs in the areas of crack formations only temporarily fixes this issue. In order to eliminate this problem, this study aims at identifying the sources of fatigue crack formation and growth in Koepe pulleys. With this objective, the numerical models of the Koepe pulley construction were developed and analysed using the finite element method (FEM). The FEM analysis was preceded by the dynamic analysis of the hoisting installation during its normal work cycle. The results of these analyses – dynamic and strength – were verified by experiments on the real object by measuring forces and stresses in the selected areas of the pulley wheel. The obtained results provided the grounds for assessing the fatigue life and for introducing an improvement to the design of the considered Koepe pulley constructions.
Keywords: Koepe pulley in hoisting installations; strength; material fatigue; experimental tests; non-destructive tests; FEM
Full Text: PDF

References

Cichocinski A., Ładecki B., Płachno M., Podsiadło A., Micek P., The analysis of reasons of defects of the Koepe pulleys of hoisting installations 4L-3400/2400 type and documentations of their repairs [in Polish], Work no 5.5.130.921, AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics, Kraków, 2002.

Cichocinski A., Ładecki B., Analysis of the causes of fatigue cracks in the construction of a motion wheel in hoisting machine [in Polish], Mechanika, Wydawnictwa AGH, 24(3): 166–172, 2005.

Cichocinski A., Ładecki B., Płachno M., Podsiadło A., Performing of analyses, measurements and development of repair works of the hoisting installation skip [in Polish], Work No. 5.5.130.490, AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics, Kraków, 2005.

Wolny S., Dynamic loading of the pulley block in a hosting installation in normal operating conditions, Archives of Mining, 54(2): 261–284, 2009.

Wolny S. Płachno M., Experimental verification of bearing rope loading in typical operating conditions of the hoisting installation, Archives of Mining Science, 54(3): 531–542, 2009.

Wolny S., Badura S., Stress analysis in structural components of the Koepe pulley in hoisting installations, Engineering Transactions, 62(2): 155–170, 2012.

Zienkiewicz O.C., Taylor R.L., Finite Element Method (5th Ed.), Butterworth-Heinemann, Oxford and Boston, 2000.

Hoffmann K., An Introduction to measurements using strain gages, Hottinger Baldwin Messtechnik GmbH, 1989.

Technical conditions of designing, performing and acceptance of welded joints in mining objects, devices and machines [in Polish], Biuro Studiów i Projektów Górniczych, Katowice, 1982.

Appendix No. 17 to the Regulation of the Minister of Industry and Trade, Vol. IV (Shaft Hoist). Requirements concerning building and maintenance of mining shaft hoists [in Polish], Wyd. „KADRA”, Katowice, 1995.

Wolny S., Ładecki B., Assessment of stress state of the supporting elements of the pulley block in a hoist installation. Transport Przemysłowy i Maszyny Robocze, 4(22): 67–71, 2013.

Henry F.D.C., The Design and Construction of Engineering Foundations, Chapman and Hall, Norwell, Massachusetts, USA, 1986.

PN-90/B-03200. Steel structures. Design rules, Polish Standard, Warsaw, 1990.




Copyright © 2014 by Institute of Fundamental Technological Research
Polish Academy of Sciences, Warsaw, Poland