IKO import bearing clearance when the choice of the points for attention

Rolling bearing radial clearance refers to a ring fixed, but another ring in vertical to the axis of the IKO import bearings, position from one extreme to another extreme position of the mobile. The choice of bearing clearance correctly or not, for precision and mechanical operation of the bearing life, friction, temperature rise, vibration and noise and so on all have great influence. As the choice of centripetal bearing clearance before hours, can make the load of rolling element number increases, the contact stress is reduced, operation is stable, but will increase friction resistance, temperature rise will increase. Conversely, increases the contact stress, vibration, and the frictional resistance is reduced, low temperature rise. Therefore, according to the bearing conditions of use, select the most appropriate clearance value, has the very vital significance. Choose in fact bearing clearance, must fully consider the following several major factors: 1, IKO import bearings and shaft and the shell hole with elastic will lead to the change of the bearing clearance value. General bearings after installation will make the clearance value reduces; 2, IKO import bearing in the process of institutions, because of the different cooling condition of shaft and the shell, to produce temperature difference between inner ring and outer ring, and thus leads to narrowing of the clearance value; 3, because the axis and shell material because of the different expansion coefficient, leads to narrowing or increase the clearance value. Centripetal bearing usually choose the most suitable work clearance value is the bearing clearance standard stipulated in the basic set of clearance value. Basic set of clearance value is suitable for the general working conditions, should be preferable. For work under special conditions of centripetal bearing cannot adopt the basic set of clearance, can choose auxiliary clearance value. Such as deep groove ball bearings, 3, 4, and 5 groups of clearance value, suitable for bearing and shaft and the shell holes are better than normal with tight interference fit or bearing inner ring and outer ring working temperature difference large mechanical components. With shell hole in the center of the shaft centerline gradient is bigger, and in order to increase its ability to carry axial load, improve bearing limit speed, and reduce import bearings IKO frictional resistance, such as operating conditions can be used 3, 4, and 5 groups of clearance value. For rotary precision or limit axial winding shaft, generally USES 2 set of clearance value ( Small clearance value) Bearings, if necessary, also offer certain additive load 'tight', in order to improve axial rigidity. 1, IKO import bearing surface strain: iron spectrum found cutting abrasive, abrasive ingredients for non-ferrous metal. 2, IKO import bearing journal surface corrosion: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum of submicron particles, water or high acid value oil paint. 3, bearing tile surface corrosion: spectrum analysis found that abnormal non-ferrous metal element concentration; Iron spectrum appeared a lot of non-ferrous metal components in sub-micron wear particles; Lubricating oil excess moisture, acid value exceeds bid. 4, bearing bush back micro wear: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum wear submicron particles, lubricating oil moisture and acid value anomalies. In liquid lubrication condition, the sliding surface is lubricating oil without direct contact, also can greatly reduce the friction loss and wear of surface oil film also has a certain vibration absorbing ability, IKO import bearing journal surface strain: iron spectrum contains iron series cutting grinding grain or black oxide particles, metal surface heat tint.