ntn bearing nature of the noise and repair methods

1: ntn bearing nature of the noise:
1. Rolling sound and control the impact of large models of ball bearings or cylindrical roller bearings ntn pure radial load low speed operation, due to the centrifugal force rolling small area in the non-load rolling element will impact or roller and cage noises. But with the speed increase, this sound will disappear. Impact of sound on the ball control methods: the radial clearance appropriate to reduce the use of reasonable structure of the material is supple nature of the bearing cage.
2.ntn bearing jarring noise and its control jarring sound is ntn cylindrical roller bearings on all occasions possible metal friction sound harsh, mostly in grease lubricated bearings in the larger models, while in the base oil performance degradation of the grease in the more likely to have, in almost no oil lubrication. In addition, in the winter are more prone, when the bear pure radial load, radial clearance in the big occasions, prone, and with models of different sizes, in the context of a given speed is high, both occurring consecutive will also intermittent. External ring raceway take special processing methods to prevent the emergence of jarring sound,
Necessary, use this ntn bearing, or an appropriate reduction of the radial bearing clearance, excellent performance and ntn bearing grease and match parts to improve rigidity.
3. Ntn roller bearings roller sound and sound control method is running when ntn bearing, the rolling body raceway surface in the rolling and continuous issued a slippery voice, all bearing the distinctive fundamental occurs sound. General roller bearing that is, acoustic sound with other sounds. Roller ball bearing noise is irregular, the frequency above 1000Hz, it does not change the main frequency of speed change, but the overall sound pressure level increased with the acceleration of speed. Sound great bearing raceway, the raceway sound pressure level is reduced with the increase of viscosity; the sound of a small roller bearing, the sound pressure level increases in viscosity to about 20mm2 / s or more,
To be increased by the reduction. FAG bearing the greater rigidity, the overall sound pressure level raceway lower. Such as the radial clearance is too small, the total sound pressure level raceway and the main frequency with reduced radial clearance increased dramatically. Voice control methods Raceway: optional low-noise bearings is waviness FAG FAG bearing small, carefully selected conditions of use. Raceway sound often affect the entire machinery of the noise, noise reduction roller machines can reduce the overall noise.
2: ntn bearing repair methods:
1. Large and extra large ntn bearings, the brink of failure or failure of the part Though no major injury, or valuable bearings must find ways to extend its effective use period;
2. Large factories used by large number of the same type of ntn bearings, the main failure mode of rolling surface wear and fretting fatigue or abrasion, especially in damaged parts or rolling over to the cage body, and still repair ring or washer value;
3. Bearing a slight injury, such as inventory, the creation of small water rust, and transport processes of small micro-abrasion, easy and wasteful to discard such cases repair.
4. Some really difficult to buy into the bearing varieties, after the failure had no spare parts and repair, particularly the import bearings;

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