Bearing noise

Source: China Bearing Network Time: 2017-12-05

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The sound is caused by oscillation; it is the acoustic characteristic of the oscillation. The representation of noise has sound intensity level; sound pressure level; sound power level. The expression of sound intensity level is:
L1=10log(I/I).
L1 is the sound intensity level (dB)
I sound intensity (W/m2)
I0 reference sound intensity; 10-12W/m2; is the threshold sound intensity of 1000HZ.
The expression of the oscillating acceleration level is:
L=20log(a/a).
L; oscillation acceleration level (dB)
a; the root mean square value of the oscillation acceleration in a certain frequency range; (m/S2)
A0 = 9. 81 Ã— 10-13m / S2
The instruments for testing the oscillation of the bearing are very common, and the equipment for detecting the bearing noise is very complicated. Usually there is no such equipment in the company.

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