The use and installation of spherical roller bearings

Spherical roller bearings are mainly suitable for cages: stamped steel plate reinforced cages (suffix E, very few in China). Stamped steel plate cage (suffix CC), glass fiber reinforced polyamide 66 cage (suffix TVPB), machined brass two-piece cage (suffix MB). Machined brass integral cage (suffix CA), stamped steel cage for vibration occasions (suffix JPA). Brass cage (suffix EMA) for vibration occasions. The same structure may have different codes on the bearings.

 

The main uses of spherical roller bearings: papermaking machinery, reduction gears, railway vehicle axles, rolling mill gearbox bearing seats, rolling mill rolls, crushers, vibrating screens, printing machinery, woodworking machinery, various industrial reducers, vertical Self-aligning bearing with seat.

 

Installation of spherical roller bearings

Spherical roller bearings are equipped with drum-shaped roller bearings between the inner ring with two raceways and the outer ring with spherical raceways. The curvature center of the outer ring raceway surface is consistent with the bearing center, so it has the same centering function as the self-aligning ball bearing. When the shaft and housing are deflected, it can automatically adjust the load and the axial load in two directions. Large radial load capacity, suitable for heavy load and shock load. Bearings whose inner diameter is a tapered bore can be directly installed. Or use an adapter sleeve or a disassembly tube to install it on the cylindrical shaft. The cage uses steel stamping cage, polyamide forming cage and copper alloy car cage.

 

For self-aligning bearings, when the bearing with shaft is installed into the box shaft hole, the use of an intermediate mounting ring can prevent the outer ring from tilting and rotating. It should be remembered that some sizes of self-aligning ball bearings have balls protruding from the side of the bearing, so the middle mounting ring should be recessed to prevent damage to the balls. A large number of bearings are generally installed by mechanical or hydraulic press-in method.

 

For separable bearings, the inner ring and outer ring can be installed separately, which simplifies the installation process, especially when the inner and outer rings require interference fit. When installing the shaft with the inner ring in place into the bearing box that already contains the outer ring, care must be taken to check whether the inner and outer rings are correctly aligned to avoid scratching the bearing raceways and rolling parts. If cylindrical and needle roller bearings use inner rings without flanges or inner rings with flanges on one side, it is recommended to use mounting sleeves. The outer diameter of the sleeve should be equal to the inner ring raceway diameter F, and the tolerance standard for machining should be d10. Drawn cup needle roller bearings are best installed with mandrels.