LYHY deck crane bearing raceway acoustic

Rolling road sound is due to rotation of the bearing rolling body raceway rolling in and create a smooth and continuous noise, only when the sound pressure level or tone greatly when attention. In fact, the rolling sound excited acoustic energy is limited, such as in the normal condition, the quality of the 6203 bearing raceway acoustic ranged from 25 to 27dB. Single row deep groove ball bearing this noise to bear radial load as the most typical, it has the following characteristics:

A. noise, vibration is random;

B. vibration frequencies deck crane bearing‍ 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 bearing‍ is high, the sound pressure level is low, but for grease lubrication, 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 Angular contact ball bearings‍ or machining precision is not high it will inspire the vibration associated with the elastic characteristics, transfer into the air into a noise. As everyone knows, even using the modern technology of manufacturing the highest machining 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 it is inevitable, however, can adopt high precision machining parts work surface, the correct selection of denoising bearing and precise use of the bearing so that the damping.