Self aligning ball bearing raceway is due to the self aligning ball bearing rotary rolling body raceway and rolling in the excited noise smooth and continuous, only when the sound pressure level or great attention to tone. In fact, the sound energy of the raceway is limited, for example, under normal conditions, the sound of the high quality 6203 deep groove ball self aligning ball bearing raceway is 5 to 27dB. This kind of noise is the most typical of the single row deep groove ball self aligning ball bearing, which bears the radial load, and it has the following characteristics.
First, the vibration frequency is above 1kHz.
Two, self aligning ball bearing the rigid seat increases, the lower the total sound pressure, which makes the type of speed increase and the total sound pressure level is slightly increased.
Three, the higher the viscosity of the lubricants, but for the grease lubrication, the lower the sound pressure level, the viscosity. The shape and size of the soap fiber can affect the noise value.
Four, no matter how to change speed, noise frequency and sound pressure level is almost the same with the speed increasing.
Five, although self aligning ball bearing raceway noise is unavoidable, it is possible to process parts working surface with high accuracy, correctly select and use precisely, so as to reduce noise and vibration.
Six. The noise and vibration are random.
The source of the sound production of the self aligning ball bearing raceway is caused by the inherent vibration of the ring after the load. When the precision of lubrication or processing is not high, the inherent vibration related to the elastic characteristics will be excited, and the transmission into the air becomes noise. The nonlinear vibration system is formed by the elastic contact of the ring and the rolling body.
The vibration system consisting of steel degree, flexibility, mass and damping determined by the design parameters of self aligning ball bearing will generate vibration that is suitable for its operation under operation conditions.
The less the deviation caused by the deviation in the manufacturing process, the smaller the vibration. The ball surface roundness, waviness and surface roughness is the most important factor on the vibration of the self aligning ball bearing parts, the shape error and the surface of inner ring and outer ring raceway roughness is self aligning ball bearing again, cleanliness and lubricant quality etc..
Operating conditions such as installation conditions, speed, the direction of the load under the axial direction, the amount of value and so on.
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