ntn bearing nature of the noise data and turntable bearings imports

1, ntn bearing nature of the noise data
ntn bearing nature of noise is the use of modern processing technology made bearings will occur, NTN Bearing determined the structure of the noise itself.
Nature of acoustic noise can be divided into roller, ball impact and jarring sound of three kinds of sound, are as follows:

(1) ntn roller bearings roller sound and control noise when running NTN Bearing imports, the rolling body raceway surface in the rolling and continuous issued a slippery voice, all bearing the special will happen The basic sound. That is, the general sound of roller bearings sound with other sounds. Roller ball bearings sound is irregular, the frequency above 1000Hz, it does not change the main frequency of speed change, but the overall sound pressure level with the speed of the speed increase. 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. ntn 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 NTN NTN bearing a 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) the ball and control the impact of large acoustic 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 on will impact the cage or raceway and noises. But with the speed increase, this sound will disappear. Impact on the rolling sound control methods include: reduction of radial clearance appropriate to use a reasonable structure of the material is supple nature of the bearing cage.
(3) NTN Bearing jarring noise and its control jarring sound of a cylindrical roller bearings NTN can happen in all occasions, the piercing sound of metal friction, mostly in grease lubricated bearings in the larger models, while in the base performance degradation of the grease in the oil more likely to have, in almost no oil lubrication. In addition, more prone to occur in winter, when pure radial load bearing, radial clearance in the big occasions, prone, and with models of different sizes, in the context of a particular speed is high, both occurring consecutive will also intermittent. External ring raceway take special processing methods to prevent the emergence of jarring sound,
This can be used when necessary, NTN bearings, or appropriate to reduce the radial bearing clearance, excellent performance and the NTN bearing grease and match parts to improve rigidity.
Second, imports of bearing turntable
Wheel bearings before installation, first install the host side checks required supporting documents should have sufficient strength, the connection surface to be machined, the surface is smooth and no debris and burrs. The machining can not achieve the required flatness, and can be used into the strength to do the special plastic filler, to ensure accuracy and to install the vibration plane.