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Imported bearing application problems caused by noise, common have two sound sound scars and dust, points mentioned below:
(1) the scars and its control method
Rolling bearings of rolling surface crack, indentation, or rust, if any, will occur like rivet rivet cyclical vibration and noise, the cycle may be fixed but mostly, the corresponding relationship between speed into a scar on the channel occurred in a row, scars on the ball, and the noise with the installation and lubrication condition and have certain changes.
This kind of noise control methods are: installation not knock when the NSK bearings, bearing and shaft assembly after a load bearing seat when prevent bearing oblique; Inventory to prevent rusting bearing and transport to prevent impact vibration; Using high viscosity of grease.
(2) dust and its control method
FAG rolling bearings with dust and other foreign bodies, the cyclical vibration will happen and the so-called dust, the size of its vibration and noise, and with or without.
Dust acoustic control methods are: to improve the bearing cleaning method, before installation to bearing, shaft and hole and matching parts all clear Shen Jiejing strictly; Remove the foreign body in lubricant; To improve the bearing seal; Avoid the use of material is not pure plastic cage or foreign bodies are embedded.
(3) the lubrication factors caused by noise and its countermeasures
Lubricant selection error and lack of lubricant degradation and induration, can lead to KOYO bearing vibration and noise, and the noise without certain regularity. In this case, only to choose suitable lubricant, adjust its lubrication dose, prolong the service life of lubricant and reasonable replacement cycle.
With the host about noise and its countermeasures
The noise is not a single caused by INA bearings, thus single to find reasons from the aspects of bearing is in vain, to host a comprehensive attention, when it is necessary to improve the performance of the host. The main narrative in the motor common hum and rack resonant sound.
(1) the hum of the motor and its countermeasures
The motor shaft axial vibration will cause a lot of high frequency noise - hum, its frequency and axial vibration frequency is the same, can is a constant change. Hum way to prevent and prevent axial vibration method is the same.
(2) bearing frame resonance sound and its countermeasures
The inherent vibration caused by axial bearing outer ring quality department of axial bending vibration mode, then called resonant acoustic noise. Increase the preload method can improve the quality of outer ring of the axial natural frequency, resonance condition, reduce the noise.