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Introduction of spherical roller bearings

wallpapers Tech 2020-07-29
Spherical roller bearings have two rows of rollers, which mainly bear radial load, but can also bear axial load in any direction. High radial load capacity, especially suitable for working under heavy load or vibration load, but cannot bear pure axial load. The outer ring raceway of this type of bearing is spherical, so it has good self-aligning performance and can compensate for coaxiality errors.
Spherical roller bearings have 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. When the bearing is bent or installed with different concentricity, the bearing can still be used normally. The self-alignment performance varies with the bearing size series. Generally, the allowable self-alignment angle is 1 to 2.5 degrees. The outer bearing can also withstand axial loads acting in two directions and has better impact resistance. Generally speaking, the allowable working speed of spherical roller bearings is relatively low.
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 early products, mainly used for main engine maintenance services. When the internal structure of the newly designed main engine bearing is comprehensively improved and the parameters are optimized, symmetric spherical roller bearings are rarely selected. Compared with the earlier produced spherical roller bearings, it can withstand greater axial loads. The operating temperature of the bearing is lower, so it can meet the requirements of higher speed. According to the inner ring with or without ribs and the cage used, it can be divided into two types: C and CA. Stamped cage CA Trian bearings are characterized by ribs on both sides of the inner ring and use a strong car cage. In order to improve the lubrication of the bearing, a spherical roller bearing with an annular oil groove and three oil holes in the outer ring can be provided to the user. This is indicated by the bearing zip code / W33. Spherical roller bearings with oil holes in the inner ring can also be provided according to user requirements. In order to facilitate the installation and replacement of bearings, spherical roller bearings with tapered holes are also provided. The taper of the taper hole is 1:12. In the future, it will be codenamed K. To meet the requirements of special users, bearings with a taper of 1:30 can also be provided, code-named K30. For bearings with a tapered inner diameter,
Spherical roller bearings are divided into: cylindrical bore and conical bore. The taper of the cone-shaped inner hole is 1:12, the rear is K spherical roller bearing (K type 153000 or 113000), and the rear is 1:30 spherical roller bearing K30. When this kind of bearing is matched with a conical shaft, the inner ring moves in the axial direction to adjust the radial clearance of the bearing.
The tapered roller bearings with the back codes K and K30 are installed on the matching adapter sleeve, and then become the bearings with the back codes K + H and K30 + H. This type of bearing can be mounted on the optical shaft without a shoulder, and is suitable for occasions where the bearing needs to be frequently installed and removed. In order to improve the lubrication performance of the bearing, there is an annular oil groove on the outer ring of the bearing, and three oil holes are evenly drilled. The code behind is W33.

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