NUMERICAL INVESTIGATIONS ON THE WORKING CYCLE OF A HYDRAULIC BREAKER: OFF-DESIGN PERFORMANCE AND INFLUENCE OF DESIGN PARAMETERS

Authors

  • Antonio Ficarella University of Lecce – Department of Engineering for Innovation, Via per Arnesano, 73100 Lecce, Italy
  • Antonio Giuffrida University of Lecce – Department of Engineering for Innovation, Via per Arnesano, 73100 Lecce, Italy
  • Domenico Laforgia University of Lecce – Department of Engineering for Innovation, Via per Arnesano, 73100 Lecce, Italy

Keywords:

hydraulic breaker, working cycle, simulation, design parameters

Abstract

This paper deals with theoretical considerations and numerical simulations concerning the working behaviour of a hydraulic breaker. At first, some formulations coming from sufficiently reasonable considerations on the working principle of the breaker, based on the hypothesis of the motion of the striking mass as uniformly accelerated, are proposed. Later, a previously realized parameterised model is used in order to investigate the influence of the inlet flow rate and of the most important design parameters on the behaviour of the machine. This analysis allows the characterization of these parameters affecting breaker performance, suggesting possible design improvements which may lead to better performance in terms of both impact energy and efficiency.

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Author Biographies

Antonio Ficarella, University of Lecce – Department of Engineering for Innovation, Via per Arnesano, 73100 Lecce, Italy

Antonio Ficarella Full Professor of Energy Systems and Environment at the University of Lecce, Italy and consultant in the field of energy systems, environment, industrial safety. He obtained the University Degree in Mechanical Engineering, the University Doctorate in Mechanical Engineering and the Diploma Course in Industrial Fluid Dynamics. The scientific activities were developed in the fields of unsteady and two-phase fluiddynamic inside machines and apparatus, thermo and fluid dynamics applied to industrial processes simulation, Diesel engines and related direct injection systems, Diesel engine control and monitoring, sensor development, innovative monitoring techniques applied to IC engines, industrial energy applications and related environmental subjects, energy recovery from biomass, wastes, industrial processes. He was involved in several basic and applied research and development projects, in collaboration with the industries, often assuming the role of scientific responsible.

Antonio Giuffrida, University of Lecce – Department of Engineering for Innovation, Via per Arnesano, 73100 Lecce, Italy

Antonio Giuffrida Born on April 5th 1974 in Catania, Italy. He received his MSc. Degree in Mechanical Engineering in 1999 from University of Catania and PhD. Degree in Energy Systems and Environment from University of Lecce, Italy. From 1998 to 1999 he spent a training period in Polytechnic of Turin under supervision of professor N. Nervegna (Fluid Power Group). He is very active in modelling, simulation and testing of fluid power components.

Domenico Laforgia, University of Lecce – Department of Engineering for Innovation, Via per Arnesano, 73100 Lecce, Italy

Domenico Laforgia Full Professor of Energy Systems and Environment at the University of Lecce, Italy and Dean of the Engineering Faculty. Director of the Research Center on Energy and Environment. Founder and senior partner at STIM Engineering Ldt. a professional corporation that boasts a wide range of skills including: consulting, engineering, and training services in the following fields of activity: industrial design, energy, ecology and environment, industrial property, technological innovation. Visiting fellow at the Mechanical and Aerospace Department at Princeton University, USA. He collaborated with ELASIS, FIAT Research Center in Southern Italy, in the development of a highly innovative Diesel injection system, known today as Common Rail and manufactured by Bosch. His work is mainly on combustion of internal combustion engines and Diesel injection systems.

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Published

2006-11-01

How to Cite

Ficarella, A., Giuffrida, A., & Laforgia, D. (2006). NUMERICAL INVESTIGATIONS ON THE WORKING CYCLE OF A HYDRAULIC BREAKER: OFF-DESIGN PERFORMANCE AND INFLUENCE OF DESIGN PARAMETERS. International Journal of Fluid Power, 7(3), 41–50. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/552

Issue

2006: Vol 07 Iss 3

Section

Original Article

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