Bearing raceway noise, means that when the bearing for high-speed rotary motion, the bearing rolling elements rolling noise generated in the raceway for the bearing raceway sound frequency, its value is greater. Here, the main reason to cause the F & Z bearing raceway sound phenomena analyzed.
1, the diameter of the ball bearing is not uniform in the process of operation, and the friction between the inner and outer rings generated.
2, the installation process, because there is no use of professional installation tools, or for other reasons, so that uneven force bearing in operation, resulting in irregular bearing ring sound.
3, the bearing clearance is too small, it will make raceway sound reduction with radial clearance increases.
4, due to the presence of inner and outer work surface uneven phenomenon bearing production, even if this injustice is subtle, also affect the rolling rolling elements, resulting in the emergence of raceway sound.
5, the total SPL F & Z bearing raceway sound is inversely proportional to the stiffness of the bearing, that bearing rigidity smaller, the total sound pressure level raceway.
6, running faster speed, the raceway total sound pressure level will also increase.
7, the viscosity of the lubricant is also significant to the total sound pressure bearing influence, an inverse relationship between them, i.e., the lower the viscosity of the bearing lubricant, the higher the overall sound pressure level generated. For grease lubrication, its noise level is also directly related to viscosity of the grease, soap fiber shape size.
Raceway sound relationship with the size of the entire size of the mechanical noise, it is necessary to strictly raceway sound control methods are the following two ways: First F & Z bearing machining accuracy improved, but should be aware that, even with the best manufacturing Technical working surfaces there will tiny geometric errors, leading to the natural vibration rolling element and raceway. The second is to improve the lubrication conditions.