1. Wear occurs on the mating surface of the bearing ring, damaging the fit between the bearing and the housing or shaft, causing the axis to deviate from the correct position, and abnormal noise will occur during high-speed working movement.
2. Due to material fatigue, the surface metal peels off, leading to an increase in the radial clearance of the bearing and the occurrence of abnormal noise.
3. Insufficient or improper lubrication, dry friction of bearings, and bearing breakage can also cause abnormal noise during bearing operation.
4. Loose or worn bearings and loose or damaged cages.
In practical work, rolling bearings often do not produce noise themselves. Bearing noise may also be caused by vibrations between the bearing and surrounding component structures. Many times, noise issues can be considered as vibration issues for the entire bearing application system.
(1) The change in the number of loaded rolling elements causes resonance: If the bearing is subjected to radial load, the number of loaded rolling elements changes, which will cause the load direction to shift and generate vibration.
(2) Local damage: Improper operation or installation may damage the bearing raceway and rolling element. During operation, the damaged components experience a specific frequency of vibration. Therefore, damaged components can be identified through vibration frequency analysis.
(3) Accuracy of related components: In a tight fit, the bearing ring may experience external deformation due to the fit with the related components, which in turn may cause vibration during operation.
(4) Contaminants: Bearings operating in polluted environments, and impurities entering the rolling element cause vibration.
2023-04-04