Spherical roller bearings

Spherical roller bearings have double row rollers, the outer ring has a shared spherical raceway, and the inner ring has two raceways that are inclined at an angle relative to the bearing axis. This ingenious structure makes it have self-aligning performance, so it is not easily affected by the angle between the shaft and the bearing box seat on the error or the shaft bending, and is suitable for the occasions where the installation error or the shaft deflection causes the angle error. In addition to bearing radial load, the bearing can also bear axial load acting in both directions.

Spherical roller bearings have two types of inner holes: cylindrical and conical, and the taper of the conical taper hole is 1:30 and 1:12. This conical inner hole bearing is equipped with an adapter sleeve or a withdrawal sleeve. The tapered inner hole self-aligning Ball Bearing can be easily and quickly assembled on the optical shaft or the stepped machine shaft.

Spherical roller bearings have two rows of rollers, which mainly bear radial loads, and can also bear axial loads in either direction. It has 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 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 shared spherical raceway, and the inner ring has two raceways inclined at an angle to the bearing axis, which has good self-aligning performance. The bearing can still be used normally, and the centering performance varies with the bearing size series. Generally, the allowable centering angle is 1~2.5 degrees. The load capacity of this type of bearing is large. In addition to bearing radial load, the bearing can also The axial load acting in both directions has good impact resistance. Generally speaking, the allowable working speed of spherical roller bearings is low.
Spherical roller bearings are divided into two different structures: symmetrical spherical rollers and asymmetric spherical rollers according to the cross-sectional shape of the rollers. Asymmetric spherical roller bearings are early products, mainly for main engine maintenance services, newly designed main engine Symmetrical spherical roller bearings are seldom used at this time. The internal structure has been comprehensively improved, designed and optimized. Compared with the early production spherical roller bearings, it can withstand larger axial loads. The operating temperature of this bearing is The bearing is relatively low, so it can meet the requirements of higher speed. According to whether the inner ring has ribs and the cage used, it can be divided into C type and CA type. The characteristics of C type bearings are that the inner ring has no ribs and adopts steel plates Stamping cage, CA type Trien bearing is characterized by ribs on both sides of the inner ring and the use of car-made solid 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, which is represented by the bearing rear code /W33. Spherical roller bearings with inner ring oil holes can also be supplied according to user requirements. In order to facilitate customer loading, unloading and replacement of bearings, spherical roller bearings with tapered inner holes can also be provided. The taper hole taper is 1:12 , and the post code is K. In order to meet the requirements of special users, bearings with an inner hole taper of 1:30 can also be provided, and the post code is K30. Bearings with a tapered inner hole can be directly mounted on the tapered journal with a lock nut, or mounted on the cylindrical journal with the help of an adapter sleeve or a withdrawal sleeve. In order to ensure that the bearing prevents harmful slippage between the raceway and the roller due to centrifugal action when the bearing is running at high speed, the bearing should bear a certain minimum radial load, which can be estimated as follows:
Fr =0.02C
where:
Fr -- minimum radial load N
C-the basic dynamic load rating N of the bearing
Equivalent Dynamic Load
P=Fr+Y1Fa when Fa/F e
P=0.67Fr+Y2Fa when Fa/F e
where:
P-equivalent dynamic load N
Y1 Y2-axial dynamic load factor
Equivalent static load
P0=Fr+Y0Fa
where:
P0-equivalent static load N
Y0-Axial static load factor