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Bearing noise is the abnormal noise of the bearing; it is mainly caused by the shortcomings of the bearing operation, the dirt in the lubricant and the friction and self-vibration when the preload is too large and the speed is too low. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
The detection of bearing noise is still based on the experience of artificial hearing; some special instruments are also used together. Because the abnormal sound is mainly determined by the physiological feelings of human beings; therefore, even if the instrument is used for testing, it cannot completely replace the artificial hearing. Discriminate. The best way; perhaps as long as the two are used together.
The instrument is used to detect bearing noise; the usual method is to control the maximum peak value of the bearing oscillation, the crest factor (or crest factor) and the pulse count. RHP sets the maximum peak limit to 4 times the effective value; that is, the crest factor is 4 When the pulse count exceeding the limit is less than 3% of the pulse count exceeding the peak of the rms value; that is, the bearing is free of abnormal sound. Many tests are also indicated; the crest factor of the normal bearing is 3~5; Bearings with abnormal sounds are 6~10; in severe cases, they can reach 10 or more.
Others; also use the kurtosis coefficient, spectrum analysis, envelope frequency analysis and sound intensity measurement to detect and dissect the bearing noise.
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Bearing noise detection
Source: China Bearing Network Time: 2017-12-29