There are many factors that affect the vibration of
Deep Groove Ball Bearing, such as the surface roughness, roundness, corrugation and cleanliness of the ball
Bearing Ring. The geometrical precision of rolling body surface also has great influence on bearing vibration.
In the daily production process, vibration is the biggest influence on the quality of finished products, and there are many factors that affect the vibration. Many external factors cannot be checked and controlled by the branch factory, such as steel ball quality and ring corrugation, etc., which are analyzed one by one.
2 formation of bearing vibration
Under the working state of the bearing, while the inner ring rotates with the spindle, the steel ball revolves around the common axis of the bearing along with the cage, on the one hand, it rotates around the center of the ball, and the outer ring is stationary under the action of axial force. If the inner channel has defects in the contact area with the steel ball, every steel ball will have displacement when passing through the defect point, and at the same time, a series of steel balls in the bearing will have corresponding displacement, and the resulting vibration will be transmitted to the outer ring, so that the outer ring will have corresponding vibration. Similarly, if there are defects in the outer ring channel in the contact area with the steel ball, every steel ball will move and vibrate when passing. If there are defects on the surface of the steel ball, the inner and outer channel contact with the steel ball defects, the same vibration. The above defects always exist in the bearing, can be large or small, and sometimes is not a single defect, may be a random combination of several defects. As a result, bearings are always vibrated, and sometimes a combination of several vibrations, resulting in different noises.
2.1 vibration waveform under ideal state
No defects were found on the inner and outer raceways of the bearing and on the surface of the steel ball; External objective conditions such as grease are good; There is no sliding between the contact points of the moving parts, only the elastic deformation of the contact area between the steel ball and the inner and outer channel and the friction between the steel ball and the oil produced by the rolling of the steel ball.
