Low-noise bearing applications --- the nature of noise and its control method

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The nature of the bearing noise is that the use of the bearing of modern processing technology will continue to occur, the decision bearing its own structure noise. The nature

of noise ca n be divided into the raceway sound and impact sound of the rolling elements and the jarring sound of three, described as follows:ball bearing suppliers
(1) bearing raceway sound and its control method raceway sound when the operation of the bearing, the rolling body raceway surface of the scroll and to issue a slippery

continuous sound is all rolling bearings are unique basic sound . ball bearing companies
The general sound of the bearing raceway sound and other sounds. The ball bearing raceway sound is irregular,

the frequency above 1000Hz, its main frequency does not vary with speed change, but its total sound pressure level increased with the accelerated speed. Bearing raceway sound,

the raceway sound of the sound pressure level is reduced with increasing viscosity; raceway sound sm all bearings, its sound pressure level increase in the viscosity to about

20mm2 / s or more by a reduction in transfer is somewhat increased. Bearing rigidity greater the total sound pressure level, the lower raceway sound. If the radial clearance is

too small, the raceway sound pressure level and frequency sharply increased with the reduction of the radial clearance. Control raceway sound: selection of low-noise bearing

waviness small bearings, careful selection of the conditions of use. The raceways sound often affect the mechanical noise, reduce the the raceways sound can reduce the

mechanical noise.NTN bearig
(2) the impact sound of the rolling body and its larger models of the control method of ball bearings or cylindrical roller bearings in the low-speed operation under pure radial

load smaller due to the centrifugal force of the rolling ele ment rolling element in a non-load area will The impact of cage or raceway noise. But as the speed increases, the

sound will disappear. The rolling element of impact sound control methods are: appropriate to reduce the radial clearance, the use of reasonable structure, materials submissive

cage bearing.
(3) bearing the jarring sound and its control method jarring sound harsh metal grinding sound cylindrical roller bearings on all occasions that may occur, mostly in the larger

models bearing grease lubrication, and performance in the base oil more susceptible to deterioration of the grease in, and almost no oil lubrication. In addition, during the

winter are more prone to prone when under pure radial load, radial clearance of the occasion, and with different model size, prone to a particular speed range, both on a

continuum will intermittently appear. External ring raceway to take special processing methods can prevent the jarring sound, this bearing can be selected when necessary, or

appropriate to reduce the radial bearing clearance, the use of the excellent performance of the grease and increase rigidity and bearing to match parts .