An experimental study into the effect of temperature and pressure on the hydraulic system

الملخص EN

Abstract The present work is conducted in order to study the effect of oil temperature and pressure variation on the hydraulic system performance at various ranges of temperature and pressure.

The oil is the first component which will be influenced by the changes in the surrounding conditions and all its properties will be changed.

The most important property of the oil that will be studied is the viscosity.

The viscosity is measured experimentally at different temperatures (20 ? 100) °C and atmospheric pressure and by using correlations taken from literature of other researchers in order to evaluate the viscosity at different temperatures and pressures.

The hydraulic test bench existing at the Fluid Mechanic Laboratory/University of Technology has been developed to meet the requirements of the experimental work.

The effect of the temperature and pressure will be studied by evaluating the work of two loading actuators (hydraulic cylinder and motor).

It was found that, the oil viscosity depends mainly on the temperature and the effect of pressure on the viscosity can be noticed clearly at low temperature.

The temperature rising in the closed hydraulic circuit is faster and higher than that in the open hydraulic circuit and the work of the system depends mainly on the temperature and the working period.-