DETERMINATION OF CLEARANCE IMPACT ON VIBRATIONS OF RADIAL BALL BEARING THROUGH EXPERIMENTAL TESTING

Mirjana BOJANIĆ ŠEJAT, Nicolae Florin COFARU, Milan RACKOV, Aleksandar ŽIVKOVIĆ, Ivan KNEŽEVIĆ, Ileana Ioana COFARU, Dejan LUKIĆ

Abstract


Rolling bearings are machine elements used in shaft and axle supports to transmit loads and ensure necessary precision between parts in relative motion. They represent one of the most critical components of machines. Despite consisting of only four components (inner and outer rings, cage, and rolling elements), the static and dynamic behavior of bearings is highly complex. Research into the dynamic behavior of bearings is motivated by the desire to reduce noise and vibrations in their application, as well as to increase longevity, stiffness, operational speed, and rotational accuracy, and to develop methods for bearing diagnostics and monitoring. The dynamic behavior of bearings is governed by the dynamic behavior of their structural elements. Vibrations occurring in rolling bearings during operation are unavoidable. Clearance is of great importance for achieving satisfactory bearing performance. Clearance designed to compensate for thermal expansion of bearing elements is a source of vibrations and introduces nonlinearity in dynamic behavior. This study conducted experimental testing to observe the influence of clearance on the dynamic behavior of the radial bearing FKL 6006. Vibrations were measured using an experimental device for measuring and controlling rolling bearing vibrations, analyzing the impact of external axial load and clearance on the dynamic behavior of the radial bearing. Measurements were carried out at the Laboratory for Machine Tools, Flexible Technology Systems, and Automation of Design Processes at the Faculty of Technical Sciences in Novi Sad. During vibration measurements, bearing vibration results were recorded digitally and are suitable for further analysis

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References


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