What are the effects of different structures of IKO combined bearing on vibration and noise

Raceway noise is a kind of stable and continuous noise excited by the rolling body rolling in the raceway when the IKO bearing rotates. People pay attention to it only when its sound pressure level or tone is extremely high.

In fact, the sound energy excited by the raceway sound is limited. For example, under normal conditions, the high-quality 6203 bearing raceway sound is 25 ~ 27db. This kind of noise is typical of single row deep groove ball bearings bearing radial load. It has the following characteristics:

1. noise and vibration are random;
2. The vibration frequency is above 1kHz;
3. No matter how the rotating speed changes, the main frequency of noise is almost unchanged, while the sound pressure level increases with the increase of rotating speed;
4. When the radial clearance increases, the sound pressure level increases sharply;
5. When the rigidity of the bearing pedestal increases, the lower the total sound pressure level is, and even if the speed increases, the total sound pressure level does not increase much;
6. The higher the viscosity of lubricant, the lower the sound pressure level, but for grease lubrication, its viscosity and the shape and size of soap fiber can affect the noise value.