Method for bearings with chemical additives, adds a certain amount of chemical additives in the lubricant, can reduce the NSK bearings of railway noise, such as Tianjin, with a factory production of the additive noise of low noise grease, you can reduce 3.9 original bearing noise on the basis, 9.2 DB is ideal for miniature and small bearings.
Absorption Manager or across vibration device using inhalation or across vibration device, to reduced noise, or isolation bearing NSK bearing noise, made good of effect, but it often in economic paid has high of cost, sometimes larger of body, hot conditions of changes, or easy rust, using should consider comprehensive, and Hou, only take other measures, to achieved low noise also cannot in yihou using the law of target. The simplest example is the high speed, rather than rail bearings and thrust of radial-axial bearings or thrust bearing shells bearing ball bearing outer ring plastic cover anti-rust lubricant, allowing generally cylindrical plastic insert, or in the same group, but was unable to control the rotation and adjacent to the mechanical friction or jamming. This approach has a certain role in the muffler. Another example is seated between bearings and add a setting in the Middle holes, you can transmit vibration attenuation of the housings rotating system, but it needs to be deployed properly, or are likely to have the opposite effect.
Change host NSK bearing noise method on the corresponding part of the speed is not very sensitive loads, but is very sensitive to the conditions allow, reduce speed, and increases torque to achieve the same purpose, but it reduces the noise. In order to reduce the noise pump system, the original use under the motor speed is 1430r/min flow 10L/min pump, 710r/min motor speed and a larger size of pump and pump itself is the same pump bearing, noise pump motor bearings significantly reduce, but expanding footprint across the Organization, costs have also increased.
Check bearing vibration of railway value changes, abnormal noise, low temperature, lubricant consumption and changes in character, driven changes in electrical currents, examination is normal, if there is an exception, it should be dealt with accordingly.