The Main Factors Affecting Vibration and Noise of Bearings
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| Time：2016.11.09 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Bearing raceway sound is due to the rolling bearing rolling in the raceway rolling to stimulate a smooth and continuous noise, only when its sound pressure level or great tone when the cause for concern. In fact, the sound of the sound track is limited, as in normal circumstances, high-quality 6203 deep groove ball bearing raceway sound 5 ~ 27dB. This noise to bear the radial load of single row deep groove ball bearings for the most typical, it has the following characteristics.
First, the vibration frequency above 1kHz.
Second, the bearing rigidity increases, the lower the total sound pressure level, the type that the speed increases, the total sound pressure level also increased.
Third, the higher the viscosity of the lubricant, but for grease lubrication, the lower the sound pressure level, the viscosity of soap fiber shape and size can affect the noise value.
Fourth, no matter how the speed changes, the noise frequency is almost unchanged and the sound pressure level is increased with the speed increase.
Fifth, although the bearing raceway noise is unavoidable, but can take high-precision machining parts working surface, the correct selection and precise use of noise reduction to reduce vibration.
6, noise, vibration with randomness.
The sound source of the bearing raceway is due to the natural vibration of the ferrule after being loaded. When the lubrication or processing accuracy is not high when it will stimulate the elastic characteristics of the inherent vibration, transmitted to the air becomes noise. The elastic contact between the ferrule and the rolling element constitutes a nonlinear vibration system.
The stiffness, stiffness, mass, damping, etc., of the vibration system determined by the design parameters of the bearing structure will produce vibrations corresponding to its mechanics under operating conditions.
Manufacturing process of the deviation caused by vibration, the smaller the deviation, the smaller the vibration. The roundness, waviness and surface roughness of steel ball surface are the most important factors of vibration in the bearing parts, followed by the shape error and surface roughness of the inner ring and outer ring channel, followed by bearing cleanliness and lubricant Quality and so on.
Operating conditions such as installation conditions, speed, axial load direction, magnitude and so on.
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