The high-quality 6203 imported bearing raceway sound is 25-27dB. This type of noise is most typical of single-row deep groove ball imported bearings that support radial loads. It has the following characteristics: 1. When the radial clearance increases, the sound pressure level increases sharply; 2. The vibration frequency is above 1kHz; 3. The higher the viscosity of the lubricant, the lower the sound pressure level, but for grease lubrication , Its viscosity, the shape and size of the soap fiber can affect the noise value; 4. noise and vibration are random; 5. the rigidity of imported NSK bearing housing increases, the lower the total sound pressure level, even if the speed increases, the total sound pressure The level has not increased much.
The raceway sound is mainly caused by the inherent vibration of the ferrule after receiving the load. The elastic contact between the ferrule and the rolling element constitutes a nonlinear vibration system. When the lubrication or machining accuracy is not high, the natural vibration related to this elastic characteristic is excited, and it is transmitted to the air to become noise. As we all know, even if the imported bearing parts are processed using the most advanced manufacturing technology, there will always be slight geometric errors of varying degrees on the working surface, so that small fluctuations between the raceways and rolling elements will excite the inherent vibration of the vibration system. The raceway noise of imported bearings is unavoidable. However, it is possible to take high-precision machining of the work surface of the parts, correctly select imported bearings and accurately use imported bearings to reduce noise and vibration.