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1 2025

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The study of the impact of oil type and throttling pressure on the vibrations of a gear pump

Wieczorek Bartosz, Warguła Łukasz, Zharkevich Olga, Gierz Łukasz Adam, Wojciechowski Łukasz, Perz Karolina

Advances in Science and Technology. Research Journal

2025

Vol. 19, no. 5

142--155

The aim of the article is to demonstrate the impact of the type of pumped oil on the values of kinematic excitations. Three groups of oils were examined: engine oils, hydraulic oils, and gear oils. The research methodology focused on measuring the average kinematic excitation and the dynamics of kinematic excitations for a fixed throttling pressure. The analysis of the results showed that the viscosity of the oil (ν) has a significant effect on the average kinematic excitation value (avg. R) in the group of oils intended for internal combustion engines, with p = 0.0285, while the influence of pressure (p) on avg. R was not statistically significant (p = 0.0799). However, for the dynamics of kinematic excitations (ΔR), pressure had a significant impact (p = 0.00001), while viscosity was not significant (p = 0.9490). In the groups of hydraulic and gear oils, none of the examined parameters showed a significant effect on avg. R. Pressure changes were significant only concerning ΔR in these groups. The highest ΔR values occurred at 0 bar pressure, indicating the influence of pressure on changes in kinematic excitations. It was also investigated that differences in the chemical composition of oils, although subtle, affect their physicochemical properties, which are important for cavitation occurrence and vibrations in the pump. Ultimately, selecting the appropriate oil, such as H2, significantly improves pump performance, which is crucial in hydraulic applications where operating pressure ranges from 100 to 300 bar.