Spherical roller bearings have double row rollers, the outer ring has one shared spherical raceway, and the inner ring has two raceways that are inclined at an angle relative to the bearing axis. This ingenious construction makes it self-aligning and therefore not susceptible to axial or bearing housing angle errors or shaft bending. It is suitable for installation errors or shaft deflections that cause angular errors. In addition to being able to withstand radial loads, the bearing can withstand axial loads in both directions.
Spherical roller bearings have a cylindrical shape and a conical shape. The conical tapered bore has a taper of 1:30 and 1:12. The conical inner bore bearing is equipped with an adapter sleeve or a withdrawal sleeve. The tapered bore self-aligning ball bearing can be easily and quickly assembled on the optical axis or step machine shaft.
Spherical roller bearings are available in: spherical roller bearings (20000CC type); tapered bore spherical roller bearings (20000CCK type); spherical roller bearings (20000CC/W33); tapered bore spherical roller bearings (20000CCK/W33 type); Spherical roller bearings (20000CCK+H type) mounted on the adapter sleeve; 6 kinds of spherical roller bearings (20000CCK/W33+H type) mounted on the adapter sleeve.
Specific introduction
Spherical roller bearings have two rows of rollers that are primarily subjected to radial loads and can also withstand axial loads in either direction. High radial load capacity, especially suitable for heavy or vibration loads, but not for pure axial loads. The outer ring raceway of this type of bearing is spherical, so its self-aligning performance is good and it can compensate for the coaxiality error.
There are two rows of symmetrical spherical rollers, the outer ring has a common spherical raceway, and the inner ring has two raceways inclined at an angle to the bearing axis, which has good aligning performance. When the shaft is bent or installed with different hearts When the bearing can still be used normally, the self-aligning function varies with the bearing size series. Generally, the allowable centering angle is 1~2.5 degrees. The bearing capacity of this type of bearing is large, and the bearing can withstand the radial load. The axial load of the two-way action has better impact resistance. Generally speaking, the adjustable rotational speed of the spherical roller bearing is low.
Spherical roller bearings are divided into two types: symmetrical spherical roller and asymmetric spherical roller according to the shape of the roller. The asymmetric spherical roller bearing is an early product, mainly for the mainframe maintenance service. Symmetrical spherical roller bearings are rarely used, and the internal structure has been comprehensively improved in design and parameter optimization. Compared with the early production of spherical roller bearings, it can withstand greater axial loads. The operating temperature of such bearings It is lower, so it can adapt to the requirements of higher speed. According to the inner ring with or without the rib and the cage used, it can be divided into C type and CA type. The C type bearing is characterized by the inner ring without rib and the steel plate. Stamping cages, Type CA Trion bearings feature ribs on both sides of the inner ring and a solid cage. In order to improve the lubrication of the bearing, the user can provide the spherical roller bearing with an annular oil groove and three oil holes in the outer ring, which is represented by the bearing rear code /W33. Spherical roller bearings with inner ring oil holes are also available according to the user's requirements. In order to facilitate the loading and unloading and replacement of bearings, the tapered roller bearings with tapered bores are also available. The taper taper is 1:12. , the future code is K, in order to meet the requirements of special users can also provide bearings with a taper of 1:30, the rear code is K30. The tapered bearing of the inner hole can be directly mounted on the tapered journal by a lock nut, or the bearing can be mounted on the cylindrical journal by means of an adapter sleeve or a withdrawal sleeve.
structure type
Spherical roller bearings are divided into: cylindrical inner bore and conical inner bore.
The taper of the conical inner bore is 1:12 rear spherical roller bearing (model 153000 or 113000) with code K and 1:30 rear spherical roller bearing code K30. When such a bearing is matched with a conical shaft, the inner ring moves axially to adjust the radial clearance of the bearing.
Post code
The tapered roller spherical roller bearings with the rear code K and K30 are mounted on the matching adapter sleeves, which become the rear bearing code K+H and K30+H bearings. This type of bearing can be mounted on an optical axis without a shoulder and is suitable for applications where the bearing needs to be installed and removed frequently. In order to improve the lubrication performance of the bearing, the outer ring of the bearing has an annular oil groove and is drilled with three oil holes evenly distributed, and the rear code is W33.
use
Mainly applicable cage: stamped steel plate reinforced cage (suffix E, rarely 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 (suffix JPA). Brass cage for vibration applications (suffix EMA). The same structure, the code on the bearing may be different.
Main uses: papermaking machinery, speed reducer, railway vehicle axle, rolling mill gearbox housing, rolling mill roller, crusher, vibrating screen, printing machinery, woodworking machinery, various industrial speed reducers, vertical with seated self-aligning bearings .