The TIMKEN bearing itself does not produce noise.The "noise" we usually feel is actually the sound effect that directly or indirectly creates vibrations with surrounding structures.Noise is the transmission of vibrations through the air as a result of the human auditory system.
This is why many times the noise problem can be considered a vibration problem that involves the whole application.When a radial load is loaded on a roller bearing, the number of rollers bearing the load will change slightly during operation, namely: 2-3-2-3...This causes a shift in the load direction.The resulting vibration is unavoidable, but can be mitigated by axial preloading, which is applied to all rolling bodies
1) bearing design parameters: including the number of bearing rollers, ring wall thickness and clearance, etc.
2) manufacturing errors of bearing parts: including surface roughness, cross grain and roundness of TIMKEN bearing raceway and rolling body.A large number of experiments show that the influence of waviness on roller bearing vibration is dominant, while the influence of surface roughness and roundness is relatively small.
3) bearing working conditions: in the running process of TIMKEN bearing, load, speed and lubrication conditions have the greatest influence on bearing vibration.
4) bearing installation parameters: the coordination between roller bearing and shaft and bearing seat, the deviation during installation and other factors also have an impact on bearing vibration.
When the waviness of the part is closely matched between the bearing ring and the bearing seat or the transmission shaft, the ring may be deformed by matching with the appearance of the adjacent part.If deformation occurs, vibration may occur during operation.Therefore, it is important to machined the seat and drive shaft to the required tolerances.Partial damage due to operational or installation errors, a small number of roller bearing raceways and rollers may be damaged.In operation, rolling through damaged bearing parts will produce a specific vibration frequency.Vibration frequency analysis can identify damaged TIMKEN bearing parts.In many applications the stiffness is the same as that of the surrounding structure.Because of this feature, it is possible to reduce vibration in service by correctly selecting TIMKEN bearings (including preload and clearance) and their in-service configuration.
