Rolling noise one is generated by the bearing itself bearing, i.e., the inherent noise; another is the bearing installed after the noise generated, regardless of the noise of the bearing itself by listening to the sound can be analyzed some problems a) the inherent noise: roller Daosheng FAG bearings and rolling friction sound is sound Rolling inherent. raceway sound is generated by the elastic characteristics of the rolling element and raceway contact when the bearing is rotating, the rolling elements rolling in the raceway issued a continuous and smooth sound; abnormal sound of rolling friction may issue a "creak, creak like uncomfortable metal friction unusual sound, good lubrication will not issue such a sound. Therefore, under normal circumstances is not a problem, only noise is increased only after the need to pay attention. b) the noise associated with the bearing manufacturing: here including noise and vibrato holder retainer noise mainly occurs in the ball bearings and tapered roller bearings, when the bearing rotation due to the vibration of the holder, and the holding frame with the rolling body collision will sound. This sound has periodically. Vibrato (bearing) is the sound of a certain frequency, large waviness due to vibration raceway have. c) caused by improper use of noise: there are all kinds of bearings. This noise is a non-bearing raceway surface or rolling surface by the bumps, indentations, rust, then it will generate the noise and vibration of a certain cycle. Dirt noise will be generated when the bearing in operation, dust intrusion. also accompanied by periodic vibration of the sound is not fixed in size, sometimes no.
First, the structural design is reasonable, while with advanced, TIMKEN bearings will have a longer life expectancy. Bearing manufacturing generally after forging, heat treatment, turning, grinding and assembly of multi-channel processing. Reasonable process, advanced, stability can also affect the life of the bearing. Which affect the quality of products bearing the heat treatment and grinding process, tend to have a more direct relationship with the failure of the bearing. In recent years, the study showed that the affected layer of the bearing surface, the close relationship of the grinding process with the bearing surface quality.
Metallurgical quality of the bearing material once the main factors affecting the rolling bearing to early failure. With the advances in metallurgical technologies (such as bearing steel vacuum degassing), to improve the quality of the raw materials. The proportion of the raw material quality factors in bearing failure analysis has decreased significantly, but it is still one of the main factors bearing failure. The selection is still bearing failure analysis must consider the factors properly.
The main task of bearing failure analysis, is based on a lot of background material, analysis of data, and failure modes to identify the main factors causing bearing failure, in order to suggest improvements targeted measures, extend bearing service period, to avoid the occurrence of sudden INA Bearings of the early failure.
The bearing vibration bearing failure affects obvious. Example,: flaking, indentation, corrosion, cracks, wear, etc. will be in bearing vibration detection in reflected through the use of special bearing vibration measuring device (frequency analyzer and vibrometer) measurable size of the vibration by the frequency distribution of the measured values of the specific situation of abnormal vibration inferred determined criteria prior to analysis and comparison of the measured values of each machine bearing the use conditions or the sensor mounting position varies .


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