In the eyes of ordinary people, the bearing is just a piece of iron, but in the eyes of industry people, it is alive! Take you into the process of bearing testing, let us enter the bearing world with life! At present, there are two ways to detect abnormal sound of SKF imported bearings. One is based on acoustic noise detection method, the other is based on vibration detection method.

1, noise detection method:

It is a direct measurement method of abnormal sound by using a high-quality microphone to extract the bearing sound pressure signal at a certain distance and direction in a muffled environment with a basic noise less than 20db, and extract the abnormal sound components by a certain analysis method.

2, vibration detection method:

It is an indirect detection method of abnormal sound, which can be divided into qualitative detection method and quantitative parameter detection method. Among them, the qualitative detection method is divided into monitoring abnormal sound method and observing vibration waveform method. Quantitative parameter detection method refers to using the measured parameter values related to abnormal sound in the vibration signal of the bearing under test, such as the peak value of vibration and the peak factor to evaluate the abnormal sound of the bearing.

3, measuring instrument for measuring bearing abnormal sound:

There are many measuring instruments for measuring bearing abnormal sound, such as: BANT-1 bearing abnormal sound monitor of Hangzhou Bearing Test and Research Center; S092 bearing vibration (abnormal sound) measuring instrument of Shanghai Bearing Technology Research Institute; S0910-Ⅲ jointly developed by Luoyang Bearing Research Institute and Dalian Bearing Instrument Factory. These bearing measuring instruments can measure the effective value of bearing vibration and the peak value, peak factor and pulse number reflecting bearing abnormal acoustic parameters.