Bearing raceway noise problem

The bearing noise of the bearing, the rolling sound is caused by the rolling of the rolling elements in the raceway when the bearing rotates to excite a smooth and continuous noise, which only attracts people's attention when its sound pressure level or tone is extremely large.

In fact, the sound energy stimulated by the rolling track is limited. For example, under normal conditions, the quality of the 6203 bearing raceway is 25 to 27 dB. This type of noise is the most typical of single row deep groove ball bearings that can withstand radial loads. It has the following characteristics:

a, noise, vibration is random;

b, the vibration frequency is above 1kHz;

c. Regardless of the change in the rotational speed, the main frequency of the noise is almost constant and the sound pressure level increases as the rotational speed increases;

d. When the radial clearance increases, the sound pressure level increases sharply;

e, the rigidity of the bearing seat increases, the lower the total sound pressure level, even if the rotation speed increases, the total sound pressure level does not increase much;

f. The higher the viscosity of the lubricant, the lower the sound pressure level, but for grease lubrication, the viscosity and the shape and size of the soap fiber can affect the noise value.

The source of the rolling sound is caused by the natural vibration of the ferrule after the load. Due to the elastic contact of the ferrule and the rolling body, a nonlinear vibration system is formed. When the lubrication or machining accuracy is not high, the natural vibration associated with this elastic characteristic is excited, and when it is transmitted to the air, it becomes noise.

Although the bearing noise of the bearing is unavoidable, high-precision machining of parts can be taken.hining of parts can be taken.

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How to use rolling bearings

Through a large number of rolling bearing failure analysis studies, the bearing short-life or premature loss of precision, due to material defects or improper manufacturing, but to a considerable extent is not strictly in accordance with the requirements of bearing installation, maintenance, or Abnormal bearing damage caused by improper bearing selection or actual load exceeding the rated load of the bearing itself

For example, fatigue spalling of bearing parts is largely due to impurities in the lubricating oil. It can be seen that in order to achieve a longer life and accuracy retention of rolling bearings, in addition to requiring bearing manufacturers to improve product quality, bearing users must also use bearings with scientific methods and procedures. Otherwise, even better bearings will be inferior. Aborted under random use conditions.

The rolling bearing is a kind of precision mechanical supporting component. The bearing user deeply hopes that the bearing mounted on the main machine can not damage and maintain its dynamic performance within the predetermined service period, but the objective fact is sometimes not satisfactory, sudden bearing failure accident. Will cause significant losses to users.

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