Spherical Roller Bearings 22220CA/W33 3520

Self-aligning roller bearings have two rows of rollers, the main bearing radial load, but also can bear any direction of the axial load. It has high radial load capacity, especially suitable for working under heavy load or vibration load, but can not bear pure axial load. The raceway of the outer ring of the bearing is spherical in shape, so its centering performance is good and the coaxiality error can be compensated. 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 have good self-aligning performance, the self-aligning ability varies with bearing size series. Generally, the permissible self-aligning angle is 1 ~ 2.5 degrees. This type of bearing has larger load capacity and can bear axial load in both directions besides radial load, with a better impact resistance, in general, self-aligning roller bearings allowed to work at a lower speed. Self-aligning roller bearings are divided into symmetrical spherical roller and asymmetrical spherical roller according to the shape of the roller cross-section. Asymmetrical self-aligning roller bearings are early products, mainly for the maintenance service of the main engine, in the new design of the main engine, the symmetrical self-aligning roller bearing is seldom used. The internal structure has been improved and the parameters optimized, and it can bear more axial load than the earlier self-aligning roller bearing, this kind of bearing can be divided into C type and CA type according to the inner ring with or without rib and the cage used, type C bearings are characterized by an inner ring without ribs and by the use of pressed steel cage. Type CA trane bearings are characterized by both sides of the inner ring having ribs and by the use of solid cage. To improve the lubrication of bearings, spherical roller bearings with annular oil grooves and three oil holes on the outer ring are available to the user, as indicated by the bearing rear code/W33. Self-aligning roller bearings with inner ring oil holes are also available according to customer's requirements. In order to facilitate loading and unloading of bearings, self-aligning roller bearings with tapered bore are also available. The taper of taper bore is 1:12, in order to meet the requirements of special users, bearings with 1:30 taper of inner bore can also be provided, and the post code is K30. Bearings with tapered bore may be mounted directly on a tapered journal by means of a locking nut, or on a cylindrical journal by means of a tightening or stripping sleeve. In order to ensure that the bearing in high-speed operation to prevent the centrifugal effect between the raceway and roller harmful slip, bearing should bear a certain minimum radial load, the size can be estimated as follows: Fr = 0.02C type: N Equivalent Dynamic Load P = Fr + Y1FA when Fa/fr e p = 0.67Fr + Y2FA when Fa/fr e Type: P fo = 1 Y2F equivalent dynamic load ny1y2f equivalent static load P0 = Fr + Y0FA type: p0f equivalent static load ny0f