期刊
ENGINEERING FAILURE ANALYSIS
卷 137, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2022.106247
关键词
Failure analysis; Bearing clearance; Chaos; Dynamics; Test verification
资金
- Major Science and Technology Projects of Sichuan Province [2020ZDZX0019]
- Lead Teacher Program of Chengdu University of Technology [10912-JXGG2021-06799]
- Southwest Oil and Gas Field Company
During the installation and operation of transmission equipment, bearing clearance problems are common and can lead to bearing failure. Research on bearing clearance is essential for understanding its impact on bearing vibration. Experimental observations indicate that small clearances result in periodic vibrations, while increasing clearances lead to chaotic vibrations.
During the installation and operation of transmission equipment, bearing clearance problems occur, which are also one of the main reasons for bearing failure. Therefore, research on bearing clearance has theoretical significance and engineering value. To determine the influence of bearing clearance on bearing vibration, the theoretical model of a 2-degree-freedom rolling bearing was established based on the dynamic characteristics of the bearing vibration. Based on Hertz elastic contact theory analysis of the dynamic characteristics of the rolling bearing, it was observed that for the tested bearings, the number of balance points of the inner ring of the bearing depends on the clearance of the bearing. When bearing inner clearance (e)e < 4.5 im is present in the bearing, a stable equilibrium point exists, and periodic vibration occurs in the inner ring of the bearing near the centre of the balance point. When a gap of (e > 4.5 im) is present, and the gap and rotational speed of the bearing increase continuously, the system generates chaotic vibrations, and the area in which the chaotic vibration occurs also increases. The experimental results of the phi 127 mm rolling bearing indicated that under the same damping parameters, bearing size and rotational speed, the results of the singular attractors obtained from the experimental data are similar to those obtained by solving the equation of motion. This qualitative result not only confirms the existence of chaotic bearing behaviour, but also verifies the reliability of the theoretical model.
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