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The use conditions and environmental conditions of spherical roller bearings

The use conditions and environmental conditions of spherical roller bearings

2021-12-07

For this, it is necessary to obtain the following data and information:


(1) Function and structure of the mechanical device


(2) Where to use spherical roller bearings


(3) Spherical roller bearing load (size, direction)


(4) Rotation speed


(5) Vibration and shock


(6) Spherical roller bearing temperature (ambient temperature, temperature rise)


(7) Ambient atmosphere (corrosiveness, cleanliness, lubricity)


The rigidity of spherical roller bearings


The rigidity of a spherical roller bearing is determined by the amount of elastic deformation that occurs when it bears a load. Under normal circumstances, this amount of deformation is very small and can be ignored. However, in some machinery, such as machine tool spindle systems, spherical rollers The static stiffness and dynamic stiffness of the sub-bearing have a great influence on the characteristics of the system. Spherical roller bearings have higher rigidity than ball bearings. Various types of bearings can also improve their rigidity to varying degrees through proper "preloading".


Spherical roller bearings are suitable for carrying heavy loads


Load size is usually the decisive factor in selecting the bearing size. Roller bearings have greater carrying capacity than ball bearings with the same external dimensions. Usually, ball bearings are suitable for light or medium loads, and roller bearings are suitable for heavy loads.


For pure radial load, deep groove ball bearings and cylindrical roller bearings can be selected. For pure axial load, thrust ball bearings and thrust cylindrical roller bearings can be selected. When there is radial load and axial load (combined load), angular contact ball bearings or tapered roller bearings are generally used. If the radial load is large and the axial load is small, deep groove ball bearings and cylindrical roller bearings with ribs on the inner and outer rings can be selected. If there are large shaft or housing deformation and poor installation alignment, self-aligning ball bearings and spherical roller bearings can be selected. If the axial load is large and the radial load is small, thrust angular contact ball bearings can be selected. If the four-point contact ball bearing still requires self-aligning performance, thrust spherical roller bearings can be selected.

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