ON THE APPLICATION OF OLEO-PNEUMATIC ACCUMULATORS FOR THE PROTECTION OF HYDRAULIC TRANSMISSION LINES AGAINST WATER HAMMER - A THEORETICAL STUDY

Authors

  • M. Galal Rabie Modern Academy for Engineering and Technology, Cairo, Egypt

Keywords:

hydraulic, accumulator, transmission line, water hammer, resistance, inertia, capacitance, compressibility, surge, lumped parameter

Abstract

The remarkable advance in hydraulic and electro hydraulic power systems resulted in producing high response control valves of very short settling time. The actuation of these valves rapidly opens or closes the hydraulic transmission lines, which may produce a severe pressure surge. This paper is dedicated to evaluate the applicability of oleopneumatic accumulators for the protection against this phenomenon. A lumped parameter model was developed for the transmission line, assuming different number of lumps, considering the effect of line resistance, inertia and capacitance. The validity of lumped parameter models is evaluated by comparing theoretical results with published experimental results. The paper presents the derivation of a closed expression for the size of the hydraulic accumulator needed to protect the transmission line against the destructive effect of the pressure surge. The study showed that the implementation of an accumulator of convenient size reduced the duration and amplitude of the transient pressure oscillations.

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Author Biography

M. Galal Rabie, Modern Academy for Engineering and Technology, Cairo, Egypt

Prof. Dr. M. Galal RABIE Professor of Mechanical Engineering, Modern Academy for Engineering and Technology, Cairo, Egypt. Previous occupations and Experience • Professor of Mechanical engineering, Military Technical College (MTC), Cairo, Nov.1991. • Head of Aircraft department, MTC. • Head of Scientific Council of Aerospace Dpt,. MTC. • Supervisor of 19 MSc and PhD Thesis. • Author and coauthor of 5 text books. • Author or coauthor of 45 papers

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Published

2007-08-01

How to Cite

Rabie, M. G. (2007). ON THE APPLICATION OF OLEO-PNEUMATIC ACCUMULATORS FOR THE PROTECTION OF HYDRAULIC TRANSMISSION LINES AGAINST WATER HAMMER - A THEORETICAL STUDY. International Journal of Fluid Power, 8(1), 39–49. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/546

Issue

2007: Vol 08 Iss 1

Section

Original Article