Factors mainly refer to Timken bearings installation and adjustment, maintenance, compliance with the technical requirements, such as maintenance and repair.
Many reasons for loss of bearings, all factors affecting the design and manufacturing process and bearing the loss related to the analysis of bad judgment. But in normal circumstances, generally can be used from both factors and internal factors to consider and analyse.
Loss factors mainly refers to the installation of the bearing adjustment, maintenance, compliance with the technical requirements, such as maintenance and repair. Installation conditions is one of the leading factors in the use factors, bearing is often caused by the installation is not the right set of stress change of bearing parts, running in an abnormal state and loss of bearings. According to bearing technical requirements for installation, use, maintenance, maintenance, operation of bearing the burden of load, speed, temperature, vibration, noise monitoring and checks and lubrication, unusual now to find reasons to adjust, bring it back to normal. In addition, the grease quality and the surrounding medium, atmosphere analysis test is also important.
(1) bearing Raceway Raceway is sound and its control method when the bearing operation, rolling it across the Raceway surface and make a slippery continuous sound, is the basic sound of all rolling bearings will be unique. General bearing Raceway acoustic sound that is combined with other sounds. Ball bearing roller is irregular, above 1000Hz frequency, frequency of rate changes with the speed, but the overall sound pressure level increases with accelerating speed of. Roller bearing raceways for its acoustic sound pressure level diminishes with the increase of viscosity while small bearing Raceway, its sound pressure level in the viscosity increases to about 20mm2/s above, by reduction to increased. Greater the rigid housings, roller lower the overall sound pressure level of sound. Radial clearance is too small, and Raceway total sound pressure level and frequency will increase sharply as the reduction in radial internal clearance. Method of controlling the rolling sound: Optional low noise bearings INA bearings corrugated-small, carefully choose the conditions of use. Acoustic noise affecting the whole machinery of the Raceway, Raceway reduction can reduce the noise of machinery as a whole.
(2) impact sound and its control method for a larger model of the rolling ball bearings or cylindrical roller bearings under purely radial load at low speed operation, due to the centrifugal force of the rolling small load-free area in the rolling elements roll cage will shock or road noise. But as the speed increases, this noise will disappear. Rolling control method for impact sound: appropriate reduction of radial clearance, reasonable structure and material compliance cage bearings.
(3) the creak of the bearing and its controlling method creak is a cylindrical roller bearing has seized all the harsh metal sound that may occur, mostly in the larger models of grease lubrication bearings, and deterioration of the base oil in lubricating grease more easily, almost does not happen when the oil lubrication. In addition, the more vulnerable in the winter, when under purely radial load, the radial clearance is prone to big occasions, and with models of different sizes, within a certain range of specific speeds likely to occur, both continuous and intermittent. External ring road, take the special processing methods can prevent the creak there, if necessary, such bearings, or appropriately reduce radial bearing clearance, excellent performance and improve and match features the rigidity of bearing lubricating greases.
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