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Characteristics of Spherical Roller Bearings, Cages, Use and Installation Methods

wallpapers Tech 2020-06-04
Spherical roller bearings are bearings with double-row rollers. The outer ring has a standard spherical raceway, and the inner circle has two raceways, which are inclined at an angle concerning the bearing axis. This original structure makes it self-aligning, so it is not easily affected by the edge of the shaft and the bearing housing on the error or the bending of the beam. It is suitable for installation where the angle error is likely to occur. In addition to being able to withstand radial loads, this bearing can also withstand axial loads in both directions.
Spherical roller bearings
 
Spherical roller bearings have cylindrical and conical bores. The taper of tapered cone bores is 1:30 and 1:12. This conical bore bearing is equipped with an adapter sleeve or a withdrawal sleeve. That is, the self-aligning ball bearing with a tapered inner hole can be easily and quickly assembled on the optical axis or the stepped machine axis.
 
Spherical roller bearings are divided into symmetrical spherical rollers and asymmetrical spherical rollers according to the cross-sectional shape of the rollers. Asymmetric spherical roller bearings are new products, mainly for the maintenance service of the main engine. Symmetric spherical roller bearings are rarely used in the unique design of the main driver. The internal structure has been comprehensively improved in design and parameter optimization, which is aligned with the early production. Compared with roller bearings, they can withstand higher axial loads. The operating temperature of such bearings is lower, so they can adapt to the requirements of higher speeds. They can be divided into CC according to whether the inner ring has ribs and the cage used. Type and CA type. The characteristics of the CC type bearing are the inner ring without ribs and the use of steel plate stamping cages. The features of the CA type Triaion bearings are the ribs on both sides of the inner circle and the use of car-made solid cages. To improve the lubrication of bearings, spherical roller bearings with an annular oil groove and three oil holes in the outer ring can be provided to users, which is indicated by the rear code of the bearing /W33. WSBC bearings can also provide spherical roller bearings with oil holes in the inner ring according to user requirements. To facilitate customer handling and replacement of bearings, spherical roller bearing bearings with tapered hidden holes can also be provided. :12, after the code is K, to meet the requirements of individual users, we can also give the bearings a taper of 1:30, and the rear system is K30. For bearings with tapered bores, the bearing can be directly mounted on the tapered journal with a lock nut, or the bearing can be installed on a cylindrical journal with the help of an adapter sleeve or a withdrawal sleeve.
 
Spherical roller bearings are mainly suitable for cages: stamped steel-reinforced cages (suffix E, rarely in China). Stamped steel plate type cage (suffix CC), glass fiber reinforced polyamide 66 pens (suffix TVPB), machined two-piece brass cage (suffix MB). Machined brass integral cage (suffix CA), stamped steel plate cage for vibration occasions (suffix JPA). Brass cage (suffix EMA) in vibration. The code on the bearing may be different for the same structure.
 
The main uses of spherical roller bearings: paper machinery, speed reduction devices, railway vehicle axles, rolling mill gearbox bearing housings, rolling mill rollers, crushers, vibrating screens, printing machinery, woodworking machinery, various industrial reducers, vertical Self-aligning spherical bearing.
 
Spherical roller bearing installation: Spherical roller bearings are equipped with drum roller bearings between the inner ring with two raceways and the outer ring with spherical raceways. The center of curvature of the raceway surface of the outer ring is consistent with the center of the bearing, so it has the same self-aligning function as the self-aligning ball bearing. When the shaft and casing deflect, the load and the axial load in two directions can be adjusted automatically. The radial load capacity is large, suitable for heavy load and impact load. The inner diameter of the inner ring is a tapered bore bearing, which can be installed directly. Or use an adapter sleeve and a dismounting cylinder to fit on the cylindrical shaft. The cage uses a steel stamping cage, polyamide forming cage, and copper alloy cage. For self-aligning bearings, when installing a bearing with a rod into the shaft hole of the case, the use of an intermediate mounting ring prevents the outer ring from tilting and rotating. It should be remembered that the balls of some sizes of self-aligning ball bearings protrude from the sides of the bearings, so the middle mounting ring should be recessed to prevent damage to the balls. A large number of bearings are generally installed using mechanical or hydraulic press-in methods.
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 need to be interference fit. When installing the shaft with the inner circle in place into the bearing box that already contains the outer ring, care must be taken to see if the inner and outer rings are correctly aligned to avoid scratching the bearing raceway and rolling parts. If cylindrical and needle roller bearings use an inner circle without flange ribs or an inner ring with a flange on one side, it is recommended to use a mounting sleeve. The outer diameter of the envelope should be equal to the diameter F of the inner ring raceway, and the tolerance standard for mechanical processing should be d10. Drawn cup needle roller bearings are best installed using mandrels.

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