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In normal use, how to reduce bearing noise has become a critical problem. Today, we will give you some of the more effective methods to better protect and use bearings.
(1) the use of vibration absorption or vibration isolation devices
In its outer to suck antirust lubricant plastic jacket, with the casing of the thrust bearings or thrust bearing on the sets in the case of the allowed, in its inner bore or cylindrical inserts in the same plastic cover, but the control friction or interference can not be used in conjunction with the adjacent parts of the rotation. This method has a certain silencer role.
Use vibration absorption or vibration isolation devices to reduce bearing noise or the isolation bearing noise, good results can be obtained, but this often pay a high price for the economic, and sometimes institutions larger cooling conditions deteriorate or rust easily, and should use them fully consider low noise indicators still can not be reached only after other measures taken after the use of this Act.
Example is the use of sound-absorbing acoustic enclosures Wuhan noise bearing system fully closed or closed as much as possible. Such a noise reducing cover inside of the glass fibers or polyurethane foam, an inner surface of a steel sheet of thickness of 0.6-lmm, face cloth φ1.2-1.5mm small through holes, the total area of the orifice about the entire inner 25% ~ 30% of the surface of the outer surface of a steel plate of 2mm thickness.
Another example is added between the bearing seat hole a middle set to spread to the bearing housing vibration attenuation rotation system, but this requires the deployment of properly, otherwise there may appear the opposite effect.
(2) changing the speed of the method of the host corresponding parts
To reduce the noise of the pump system, the original used in the motor speed of 1430r/min under an oil pump flow rate of 10L/min, the changed speed 710r/min motor and together with the larger size of the pump to obtain the same flow, pump itself, the noise of the pump bearings and the pump motor bearings are significantly reduced, but the package bodies widened space occupied, the cost is also increased.
The noise of the rolling bearing load is not very sensitive, but the speed is very sensitive to achieve the same purpose, under the conditions allowed, the methods used to reduce speed and increase torque, but it reduces the noise.
(3) The method of use of chemical additives
Add certain chemical additives in the lubricant of the bearing, bearing noise can be reduced, for example, the Tianjin factory produced comprising a low noise grease noise reduction additives, the bearing noise can be reduced from the original on the basis of 3.9 ~ 9.2dB suitable for use in a micro or small bearing.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7213CTYNP5 NSK | 65 | 120 | 23 |
| 7212ATYNP5 NSK | 60 | 110 | 22 |