IKO angular contact ball bearing noise fault checking and removing methods

Of course, in terms of monitoring and diagnosis of IKO bearing fault, using vibration than noise is much more easy and reliable, therefore, the vibration is the main research direction. But, it's not belong to the bearing itself, which belongs to the angular contact ball bearing application problems, should be a different matter. Owing to IKO bearing vibration and noise the direct correlation, under certain conditions can be said to be the synonym, so in the production and use, always will be 'anti-vibration noise reduction' together, 'low vibration bearing' tend to habitually called 'low noise bearings,' reasons for this. By controlling the bearing vibration to control IKO bearing noise, not only directly caught the source and the cause of the noise, also because of implementation is simple, such as measuring vibration less affected by environmental conditions, basic easily separation and easily applied in the actual production, etc. While measuring noise to the environment conditions the demand is higher, need to have a very low background noise, so generally must be in silencing indoor construction cost is higher. From spalling, indentation, rust, crack and wear will be reflected in the bearing vibration measurement, bearing vibration of bearing damage is very sensitive, so the angular contact ball bearing through the use of special bearing vibration measuring device ( Frequency analyzer, etc. ) Can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Due to the measured values of bearing or sensor installation position and different using conditions, thus requiring prior to each machine is analyzed by the measured value of the determined after judgment standard. a) Inherent noise: race with all sorts of IKO bearings and rolling friction ( Cylindrical roller bearing) Is inherent in the sound, rolling bearing raceway is by the elastic properties of the rolling element and raceway contact, when the angular contact ball bearing rotating roller rolling over on the rolling path of a continuous and a sophisticated sound; Abnormal sound of rolling friction can be issued a 'tickle, tickle' uncomfortable metal friction abnormal sound, smooth and good, won't make such a sound. So in normal condition is not a problem, as long as the noise increased after must pay attention to. b) Noise is related to the bearing manufacturing: here including aircraft noise and tremolo, adhere to the main attack aircraft noise in ball bearings and bearings, when the angular contact ball bearing rotation due to adhere to the vibration of the frame and frame and roller impact makes a noise. The sound is cyclical. Tremolo ( All kinds of bearing) There is a certain frequency of sound, it is because of the raceway surface waviness of provoked vibration. This phenomenon is the most common problem, we later demand of can. In particular, we are learning some IKO bearing knowledge of students, to seriously look at these key content, may have so some assistance to you. c) Using improper provoked noise: about various bearing all exist. When the angular contact ball bearing raceway appearance or rolling table in vitro was bruised, pit, rust, then you will have certain periodic noise and vibration. When bearing in operation will produce contamination noise have dust intrusion. This noise is cyclical, also with vibration, its sound size is not fixed, sometimes no. Processing, step down tight sleeve, readjust the matching of the shaft and the inner ring tightness, replace the bearing after the clearance from 0. 10mm。 To restart the installation fan, bearing vibration value and operating temperature back to normal. Bearing internal clearance is too small or poor parts design and manufacture of precision, is an extension of angular contact ball bearing operating temperature on the high side, for the convenience of the fan equipment installation; Repairing and maintenance. Commonly used more on the design of set set of bearing inner ring with tapered bore the bearing bearing, but also easily because of the negligence of the installation program problem. Especially the adjust of the appropriate clearance. Bearing internal clearance is too small. Operating temperature rise sharply: tapered bore the bearing inner ring is too loose and set fit, IKO bearings for loose fitting surface occurs easily and failure loss in a short period.