Analysis of noise causes a disk bearing
A. noise and vibration is random;
B. vibration frequencies above 1kHz;
C. No matter how changes in speed, noise frequency and sound pressure level is almost the same with the speed increase;
D. when the radial clearance increases, the sound pressure level increases sharply;
Rigid E. bearing increases, the lower the total sound pressure level, even if the speed increased, the overall sound pressure level increases slightly;
F. lubricant viscosity is high, the sound pressure level is lower, but the grease, the shape and size of the viscosity, the soap fiber can affect the value of the noise.
Rolling road sound source is the inherent vibration caused by load ring after. Due to the elastic contact rings and rolling elements of nonlinear vibration system. When the lubrication or machining precision is not high it will inspire the vibration associated with the elastic characteristics, transfer into the air into a noise. As is known to all, even using the modern technology of manufacturing the highest machining slewing bearing parts, its work surface there are tiny geometric error is not a degree, so that the raceway and rolling body produce tiny wave excitation vibration vibration system.
Although FAG bearing raceway noise is unavoidable, but can take high precision machining parts work surface, the correct selection of noise reduction wheel bearing and precise use of the bearing so that the damping.
Two, rust preventive maintenance method
1, soaking method: turntable bearing by soaking in anti rust oil, make a layer of antirust oil on its surface adhesion. The oil film thickness can be achieved by controlling the antirust grease temperature or viscosity.
2, brush coating method for not suitable soaking or spraying bearing turntable bearing or special shape, the brush should not produce rust preventive oil accumulation, also want to notice to prevent leakage of coating.
3, spray method: some large FAG bearings can not by soaking method with about 0.7Mpa pressure filter with compressed air spray in air cleaning. Application of solvent spray dilution type rust preventive oil or thin film anti rust oil, but must be used to improve the fire safety and labor protection measures.