Preliminary communication

https://doi.org/10.17559/TV-20131219155712

Mathematical simulation and measurement of expansion of hydraulic hose with oil

Lumír Hružík ; VŠB – Technical University of Ostrava, Faculty of Mechanical Engineering, 17. listopadu 15/2172, 70833 Ostrava-Poruba, Czech Republic
Adam Bureček orcid.org/0000-0002-5100-6504 ; VŠB – Technical University of Ostrava, Faculty of Mechanical Engineering, 17. listopadu 15/2172, 70833 Ostrava-Poruba, Czech Republic
Martin Vašina orcid.org/0000-0002-8506-098X ; VŠB – Technical University of Ostrava, Faculty of Mechanical Engineering, 17. listopadu 15/2172, 70833 Ostrava-Poruba, Czech Republic

Abstract

The paper deals with measurement and mathematical simulation of expansion of a hydraulic hose including the effect of oil bulk modulus. Young’s modulus of elasticity of the hydraulic hose is experimentally determined by expansion method and by compression method. The modulus of elasticity of the hydraulic hose obtained from the expansion method is determined by measurement of an oil volumetric gain, which is compressed inside the investigated hose after the oil expansion. The Young’s modulus of elasticity of the hydraulic hose obtained from the compression method is determined by measurement of oil flow and pressure increase vs. time in the hydraulic hose. The oil bulk modulus is experimentally determined by means of the expansion method and the method of oil compression in a steel pipe. A hydraulic circuit for simulation of the oil expansion from the hose and the steel pipe was created using Matlab SimHydraulics software. The oil volume increase after the expansion from the hydraulic hose and the steel pipe was numerically simulated. Furthermore, time dependencies of pressure decreases during the oil expansion from the hydraulic hose and the steel pipe were numerically simulated. Results of the mathematical simulations were compared with the experiment while using the Young’s modulus of elasticity of the hose and the oil bulk modulus that were determined by the expansion method and by the compression method.

Keywords

air bubbles; bulk modulus; compression; expansion; hydraulic hose; mathematical simulation; oil; Young’s modulus of elasticity

Hrčak ID:

190189

URI

https://hrcak.srce.hr/190189

Publication date:

3.12.2017.

Article data in other languages: croatian

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