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Features of spherical roller bearings

wallpapers Tech 2020-07-29
Spherical roller bearings are bearings with drum-shaped rollers assembled between the inner ring with two raceways and the outer ring with spherical raceways. Spherical roller bearings have two rows of rollers, which mainly bear radial load, and at the same time can bear an appropriate amount of axial load in any direction; have a high radial load capacity, especially suitable for radial heavy load or vibration load Work, but cannot bear pure axial load.
The main features of spherical roller bearings are:
(1) Similar to self-aligning ball bearings, the outer ring raceway of a spherical roller bearing is a part of the spherical surface, and its curvature center is on the bearing axis. The outer ring raceway of this type of bearing is spherical, so its self-aligning performance is good , Can compensate the coaxiality error, so it can realize automatic centering.
(2) In the section perpendicular to the rolling direction, the generatrix of the roller is a curve, which can be in good agreement with the inner and outer raceways. The roller and the raceway are in line contact and can bear radial load and axial load. The impact resistance.
(3) The rollers of the spherical roller bearing have a high degree of coincidence with the raceway, and they are all curved generatrixes, so the relative sliding is serious, and the friction is greater than that of the cylindrical roller bearing, so the allowable working speed of the spherical roller bearing Lower.
(4) Ordinary core roller bearings have asymmetrical rollers, which will produce an axial component force during operation. The rollers are in contact with the central fixed rib due to this component force. The symmetrical roller Spherical roller bearings, which use movable intermediate retaining rings that can move in the axial direction, so that the rollers are no longer constrained by the central retaining edge, and the undercut groove of the inner ring raceway is omitted, and longer rolling To improve the bearing capacity of the bearing.
(5) The contact angle of single row spherical roller bearings is zero. , The contact angle does not change significantly under the axial load, and a small axial load will produce a large contact force between the roller and the raceway. Therefore, when the axial load is relatively greater than the radial load, single-row self-aligning Roller bearings cannot withstand combined radial and axial loads.
(6) Similar to the self-aligning ball bearing, the double-row spherical roller bearing with adapter sleeve can be installed on any position of the optical axis without machining the positioning shoulder.

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