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

Wieczorek B. Warguła Ł. Zharkevich O. Gierz Ł.A. Wojciechowski Ł. Perz K.
2025 Politechnika Lubelska

Advances in Science and Technology Research Journal
2025 #19 Issue 5 142 - 155 pp.

The aim of the article is to demonstrate the impact of the type of pumped oil on the values of vibrations expressed by acceleration. Three groups of oils were examined: engine oils, hydraulic oils, and gear oils. The research methodology focused on measuring the average vibrations expressed by acceleration and the dynamics of vibrations expressed by acceleration 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 vibrations expressed by acceleration value (avg. R) in the group of oils intended for internal combustion engines, with p = 0.0285, while the impact of pressure (p) on avg. R was not statistically significant (p = 0.0799). However, for the dynamics of peak-to-peak acceleration (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 impact of pressure on changes in vibrations expressed by acceleration. It was also analyzed 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. The findings also provide valuable insights for industrial applications, particularly in the diagnostics of oil production installations and the design of pipelines for packaging and transporting oils. By understanding the relationship between oil properties, cavitation, and pump vibrations, engineers can optimize system performance, extend equipment lifespan, and ensure more reliable operation under varying pressure conditions.

hydraulic pumps , kinematic characteristics of the pump , kinematic forces , pump vibrations

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Institute of Machine Design, Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, Poznań, 60-965, Poland
Department of Technological Equipment, Mechanical Engineering and Standardization, Abylkas Saginov Karaganda Technical University, Karaganda, 100027, Kazakhstan
Institute of Machines and Motor Vehicles, Faculty of Civil Engineering and Transport, Poznan University of Technology, Poznań, 60-965, Poland

Institute of Machine Design
Department of Technological Equipment
Institute of Machines and Motor Vehicles

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