Date: 2013-08-20

Bearing Maintenance Phenomenon causes of damage to be addressed

Bearing raceway sound and control raceway sound is when the one-way bearing operation, its rolling body raceway rolling issued a slippery continuous sound, all bearing the unique occur basic sound. Sound that is generally bearing raceway sound with other sounds.
Bearing raceway sound is irregular frequencies above 1000Hz, its main frequency does not change with the speed, but the total sound pressure level increases with the speed acceleration. Bearing raceway loud, the sound pressure level of its raceway with the viscosity decreases with increasing; while the sound of a small roller bearings, and its level increased in viscosity to about 20mm2 / s or more, by reducing the transfer is somewhat increased. Greater rigidity of bearing raceway total sound pressure level is lower. If the radial clearance is too small, the total sound pressure level raceway and the main frequency will decrease as the radial clearance increases dramatically. Control raceway sound methods are: selection of low-noise bearings that waviness small bearings, judicious selection of the conditions of use. Raceway sound often affect the entire mechanical noise reduction raceway sound can reduce the overall mechanical noise.
Rolling sound and control the impact of the larger models of ball bearings or cylindrical roller bearings in pure radial load low speed, the centrifugal force due to rolling body is small, in a non-load zone of rolling element cage will impact or raceway and noisy. However, as the speed increased, the sound will disappear. Impact on the rolling sound control methods are: appropriate to reduce the radial clearance, the use of reasonable structure supple material of the bearing cage.
Water roller bearings from the bearing damage analysis, we found that the structure of water roll the following problems:
1, the sealing problem. Especially water roller ends need to be immersed in a part of the fountain solution, when the dampening solution PH value of less than 6, the bearing will corrode quickly, the ball does not rotate, resulting in the bearing inner and outer rings run rust death, serious gum body mandrel all scrapped.
2, bearing the axial force problem. Apart from the dampening fluid invasion corrosion damage, the bearing will be a "fall apart" phenomenon, that the bearing balls from "basket" scattered in the drum, so that the printing plate cylinder, a blanket cylinder, plastic and other surfaces severely damaged.
The general solution methods: Modify the plastic body, set up a reliable seal structure to prevent dampening fluid immersed bearings. Adjust bearing to allow the correct clearance and axial force, to avoid bearing the loose lead to mechanical damage.

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