Strength estimation of the impact zone – A critical area of the tools of the hydraulic hammers

• Autorzy: Sokolski M. , Sokolski P.

Identyfikatory

DOI

10.1016/j.acme.2016.04.007

• Języki publikacji: EN

Abstrakty

EN

The hydraulic hammers are subjected to the impact loads, under which the elements of the tools can fail. The basic cause for this is the stress concentration in the critical contact areas and negative effects of environmental conditions – such as low temperatures, high humidity, or presence of salt. The particular critical area of the tools of the hydraulic hammers is the impact zone, which defines a limit of maximum impact velocity and blow energy of the piston. Taking this into consideration, the analysis of the stresses generated by impact on the contact surface of the tool was carried out. On this basis the realized as well as the required values of the safety factor for the impact zone were estimated as well and allowable impact velocity was determined which was conditioned by the strength of both the piston and the tool.

Słowa kluczowe

EN

hydraulic hammers; tools degradations; contact stresses; strength analysis; safety factor

PL

młot hydrauliczny; naprężenie kontaktowe; analiza wytrzymałościowa; współczynnik bezpieczeństwa

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2016
• Tom: Vol. 16, no. 4
• Strony: 767--776
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Sokolski M.

• Faculty of Mechanical Engineering, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

autor

Sokolski P.

• Faculty of Mechanical Engineering, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

Bibliografia

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• [10] T. Smolnicki, Large Size Machines Rotation Joints, Local and Global Phenomena, Oficyna Wydawnicza Politechniki Wroclawskiej, Wroclaw, 2013 (in Polish).
• [11] M. Sokolski, Hydraulic hammers – development trends in the past quarter – century, Górnictwo Odkrywkowe 50 (4/5) (2009) 123–128 (in Polish).
• [12] M. Sokolski, Fundamentals of Synthesis of Characteristics of Hydraulic Hammers, Oficyna Wydawnicza Politechniki Wroclawskiej, Wrocław, 2013 (in Polish).
• [13] M. Sokolski, P. Sokolski, Assessment of the probability of failure-free operation of the working system of a small-dimension hydraulic hammer – a case study, in: L. Podofillini, et al. (Eds.), Safety and Reliability of Complex Engineered Systems, Taylor & Francis Group, London, 2015 4213–4217.
• [14] TB Series Hydraulic Breakers, Owner's Manual Breaker Technology Inc., Thornbury, ON, Canada, 2013.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę