Turntable bearing raceway noise cause analysis

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a. noise, vibration is random;ball bearing manufacturer
b vibrational frequencies above 1kHz;
regardless of the speed of how change, the main frequency of the noise is almost constant sound pressure level with the speed and improve;
radial clearance increases, the sound pressure level increased dramatically;
e chock rigidity increases, the overall sound pressure level is lower, even if the speed increases, the total sound pressure level also increased little;
f. the higher the viscosity of the lubricant, the lower the sound pressure level, but for grease lubrication, the viscosity, the soap, the size of the shape of the fibers can affect the noise value.
Raceway sound generating source is due to inherent vibration by the load ferrule. Rings and rolling bodies elastic contact a nonlinear vibration system. Will stimulate the natural vibration of the elastic characteristics when lubrication or not high machining accuracy, passed to the air becomes noise. As we all know, even a the contemporary most manufacturing technology and processing turntable bearing parts, work surface there will always be varying degrees of tiny ge ometric errors, so roll tiny fluctuations Road and rolling body to stimulate the natural vibration of the vibration system.
Bearing raceway noise is inevitable, however, can be taken to the high-precision machined parts work surface, the correct selection of the turntable bearing and precise use of bearing make noise damping.