Bearing noise reduction methods are as follows: Methods (1) the use of chemical additives Add some chemical additives are added into the bearing lubricant, can reduce the bearing noise, such as tianjin a factory to produce a low-noise grease containing noise reduction additive, on the basis of bearing noise from the original can be reduced 3.9 ~ 9.2 dB, suitable for use in the micro or small bearings.

(2) using vibration absorption or isolation device To use vibration absorption or isolation devices to reduce the bearing noise or noise isolation bearing, can get good effect, but this often pay a high price in terms of economy, sometimes make institutional change, cooling condition, or easy to rust, use of comprehensive consideration, only after other steps taken, still cannot use can reach the indexes of the low noise after this law.

The simplest example is under the high speed instead of the thrust bearing and thrust under the centripetal ball bearings, can be in the position to full of antirust oil absorption plastic outer coat, the thrust bearing of the belt cover or general thrust bearing in the permission, cylindrical hole in them or set in the same plastic covers, but control with adjacent parts when rotating friction or interference.This method has a certain silencing effect.

Another example is in the middle of the bearing with a hole between join a set, can decrease the rotation system to bearing vibration on the power, but this requires allocate appropriate, or have the opposite effect may occur.

An example again is a sound insulation cover using acoustic noise will happen in the bearing system is completely closed or closed up as soon as possible.Inside of the noise reduction cup for glass fiber or polyurethane foam plastic, the inner surface of 0.6 - LMM thickness of steel plate, surface uniform phi small hole is 1.2 1.5 mm, the total area of the holes are about accounts for 25% ~ 30% of the entire inner surface, outer surface for 2 mm thickness of steel plate.

Here the glass fiber or foam plastics are applied to eliminate the high frequency noise, the inner surface of the belt holes used to eliminate the low frequency noise, and outside surface of thick steel plate were used to isolate the noise gaiden. (3) change the host corresponding speed method Rolling bearing noise is not very sensitive to load, but the speed is very sensitive, in conditions allow, reduce speed and increase torque method to achieve the same job, but it reduces the noise.

[example] to reduce the noise of the pump system, the original used in motor speed to 1430 r/min flow to 10 l/min pump, instead of the speed of 710 r/min and match with more specifications of the pump and motor after you get the same flow rate, oil pump, oil pump itself bearing oil pump and motor bearing noise is significantly reduced, but take up space, a complete set of institutions cost also increased.