In the inspection movement the machine condition and prepares the thorough inspection plan already more and more important, in which also take the NSK bearing as the attention focal point, because it is in all machines the most important revolving components, the cylindrical roller bearing condition monitor is in the preventive maintenance an important link, the early examination NSK bearing destroys avoids because the bearing destroys the non-planed maintenance period equipment engine off which creates.Under the cylindrical roller bearing I on with everybody introduced listens attentively to this method.
The cylindrical roller bearing recognizes the irregular revolution using the sense of hearing is one very ordinary method, the example like comes Zha Juemou with the aid of the electronic formula stethoscope components not the normal noise to have experiences the operator to use.If the bearing is in the good revolution condition to be able to make the low hum sound, if sends out the incisive hissing sound hissing sound sound cylindrical roller bearing, psst the sound and other irregular sound, usually expressed the bearing is in not the good revolution condition.
1st, tiling corrosion: The spectral analysis discovery non-ferrous metal element density is unusual; In the hard spectrum appeared many non-ferrous metal ingredient submicron level attrition pellet; Lubricating oil moisture content exceeding the allowed figure, acid value exceeding the allowed figure.
2nd, journal surface pulling injury: In the hard spectrum has the iron is cuts the abrasive or the black oxide compound pellet, the metal surface existence tempering color.
3rd, journal surface corrosion: The spectral analysis discovery iron element density is unusual, in the hard spectrum has many hard ingredient submicron pellet, lubricating oil moisture content exceeding the allowed figure or acid value exceeding the allowed figure.
4th, superficial pulling injury: In the hard spectrum the discovery has the cutting abrasive, the abrasive ingredient is the non-ferrous metal.
5th, tile back fine motion attrition: The spectral analysis discovery iron density is unusual, in the hard spectrum has many hard ingredient submicron attrition pellet, the lubricating oil moisture content and the acid value is unusual.
Under the liquid lubrication condition, the slipping surface is separated by the lubricating oil does not occur the direct contact, but also may reduce the friction loss and the surface greatly wears, the lubricant film also has certainly attracts inspires ability
The incisive psst noise possibly is because not the suitable lubrication creates.Not the suitable NSK bearing gap also can create the metal sound.On the cylindrical roller bearing addendum circle track dent can cause the vibration, and creates the smooth clear sound, if because installs time creates the rap scar also can have the noise, but this noise can along with the NSK bearing rotational speed height different.If has the intermittent noise, then indicated rolls the moving parts possibly to suffer injury, cylindrical roller bearing this sound is occurs in works as the damage surface is been obsolete by the rolling, if in the bearing has the pollutant often to be able to cause the hissing sound hissing sound sound, and the serious bearing damage can not have the rule the huge noise.
The bearing damage no doubt may look up because of the hearing sense, but usual this time already arrived the NSK bearing to have to replace immediately.Therefore, the good method for example use like electronic formula condition monitor instrument, cylindrical roller bearing measles break the bearing in advance the working condition.
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