Operating conditions and environmental conditions of spherical roller bearings
Correctly grasp the spherical roller bearings in mechanical devices and the use of parts and conditions and environmental conditions is the premise of the selection of suitable spherical roller bearings. For this, the following aspects of data and information need to be obtained.
(1)The function and structure of the mechanical device
(2)The use of spherical roller bearing parts
(3)Spherical roller bearing load (size, direction)
(4)Rotation speed
(5)Vibration, shock
(6)Spherical roller bearing temperature (surrounding temperature, temperature rise)
(7) surrounding atmosphere (corrosion, cleanliness, lubricity)
Spherical roller bearing rigidity
Spherical roller bearing rigidity is determined by the amount of elastic deformation that occurs when it is subjected to load, in general, this deformation is small and negligible, but in some machinery, such as machine tool spindle system, spherical roller bearing static rigidity and dynamic rigidity of the system has a great impact on the characteristics. Spherical roller bearings have a higher stiffness than ball bearings. The various types of bearings can also be increased in varying degrees of rigidity by appropriate "preload".
Spherical roller bearings are suitable for heavy loads
The size of the load is usually the decisive factor in the selection of the bearing size. Roller bearings have a higher load carrying capacity than ball bearings with the same profile. Usually ball bearings are suitable for light or medium loads, roller bearings are suitable for bearing heavy loads.
Load mode pure radial load can choose deep groove ball bearings, cylindrical roller bearings. Pure axial load can be used thrust ball bearings, thrust cylindrical roller bearings. Radial load and axial load (combined load), the general choice of angular contact ball bearings or tapered roller bearings. If the radial load is large and the axial load is small, can use deep groove ball bearings and inner and outer ring have the edge of the cylindrical roller bearings. If there is also a shaft or shell deformation and installation of poor neutrality, can choose spherical ball bearings, spherical roller bearings. If the axial load is large and the radial load is small, you can choose thrust angular contact ball bearings, four-point contact ball bearings such as also require alignment performance, can choose thrust spherical roller bearings.
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