Part of the abnormal sound of INA bearing is a bearing noise, it refers to the various overlays in basic bearing noise is not pleasant voice. Its range, produced more reasons, such as scrolling surface kepeng, impurities into the roll surface poor, guiding surfaces meet, and vibration of cages, cages with steel ball collision, and so on. There is currently no standard bearing abnormal sound detection methods and procedures. But looking at the INA bearing vibration waveform, is no different from tones and low noise bearing the waveforms are no ups and downs large peak pulse, where appear larger when it reaches peak pulse is not pleasant voice can be heard, which is often the abnormal noise. BANT series bearing abnormal sound measurement is based on this principle to quantitatively measure of bearing abnormal sound levels.
INA bearings in operation process, in addition to bearing parts inherent in some of the campaign, by functional requirements of any departure from this ideal location other than movement are referred to as bearing vibration.
When INA bearing vibration propagation to the radiation surface vibration energy into pressure waves, medium and then spread to acoustic radiation by air. 20-20000Hz part thereof for human ears to receive acoustic radiation, is the noise of rolling bearings.
INA bearing noise measurements should be carried out in a special silencer indoor, low background noise of Anechoic Chamber, bearing noise, and ambient noise can be distinguished, but their construction costs are high, and cannot be tested at the scene. INA bearing vibration is the main source of noise, and noise performance is a strong feature, it is generally replaced by vibration measurement noise measurement.
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