Ball Bearing Vibration And Noise

Ball bearings in contact with the Contact Characteristics of vibration caused by incentives

, thus affecting the access to the Contact Characteristics of factors such as load, speed and bearing lubrication will affect the vibration characteristics.

ball bearings bearing vibration noise is spread in the air by people feeling the results of the auditory system. Some China-made low-noise deep groove ball bearing vibration and noise of the sound pressure level and the level of foreign low-noise bearing considerable, but uniform sound pressure level of foreign bearing samples are quite consistent, while the bulk of domestic differential bearing samples, consistency difference; foreign sample the low proportion of abnormal sound.

Abnormal sound of ball bearings, is a new issue is an old problem. It is a new problem, because it is the vibration from low values in recent years bearing direction to the mute, bearing constantly improve the quality of the problems exposed in the process. It is an old problem, because early in the pursuit of low-vibration bearings are not demanding higher quality sound, but bearing abnormal sound is an objective, once the bearings reduce vibration value and stability to a certain level, abnormal Sound on the stand out of.

My early detection of bearing vibration measuring instrument only valid values for this parameter vibration, qualified products tested, the user still think there is some bearing different sound. This is because the measured RMS vibration and abnormal sound is not closely correlated. Bearing vibration RMS value reflects the pulse of the vibration is not sensitive, it only reflects the average level of bearing vibration, and can not effectively determine whether there is abnormal bearing noise, but the peak vibration acceleration level technical requirements can limit the peak under the bearing vibration (noise) level for effective assessment of the sub-file, the abnormal bearing noise test can play a normative role,

Therefore it is reasonable and practical well.

On the vast majority of low-noise, vibration and abnormal sound is bigger and so three different grades of bearings, their vibration peaks from low to high in order: low-noise bearings, bearing an abnormal sound, vibration, bearing a large value . This shows that the abnormal noise peak level of bearing vibration acceleration values in the low noise and vibration between the two large bearings. Thus, to evaluate the bearing vibration RMS sound abnormal high rate of false positives.

Currently there are two ways to detect abnormal sound. One is the detection method based on acoustic noise, and the other is based on the vibration detection.

Noise detection method, is in basic Noise less than 20db silencer Huan Jing Xia, use high quality microphone with certain of the distance and direction Tiqu bearing sound pressure signal and extracted by a certain method to extract the abnormal sound component, Abnormal sound is a direct measurement.

Vibration detection method is the indirect detection of abnormal sound method of detection can be divided into qualitative and quantitative parameters of detection. Among them, the qualitative detection method is divided into monitoring and observation of abnormal sound vibration waveform method. Detection of quantitative parameter refers to the measured bearing vibration signals measured with the abnormal sound-related parameter values, such as: vibration peak, crest factor to evaluate the bearing of abnormal sound. Measuring bearing a lot of unusual sound measuring instruments.

Related Keywords: Ball BearingsDeep Groove Ball BearingsDeep Groove Ball Bearing

by: asiabearings

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