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The working principle of sealed spherical roller bearings

wallpapers News 2021-07-22
The working principle of sealed spherical roller bearings
 
The center of the outer raceway of the sealed spherical roller bearing is the same as the center of the bearing, and it has an automatic centering function, which can compensate for the installation error between the shaft and the bearing or the shaft deflection to cause the inner upper ring to tilt. It is called "universal bearing" especially suitable for heavy load or vibration occasions.
Sealed spherical roller bearings are divided into the cylindrical bore and a conical bore. Among them, the taper of the conical inner hole is 1:12, the rear code is K, and the 1:30, the rear code is K30. When this type of bearing is matched with a conical shaft, the inner ring moves along the axial direction to adjust the radial clearance of the bearing.
 
Sealed spherical roller bearings have tapered bore sealed spherical roller bearings whose rear codes are K and K30. When installed on a matching adapter sleeve, they become rear codes K+H and K30+H bearings. This type of bearing It can be installed on an optical shaft without a shaft shoulder, which is suitable for occasions where bearings need to be frequently installed and removed. In order to improve the lubrication performance of the bearing, there is an annular oil groove in the outer ring of the bearing and three evenly distributed oil holes are drilled, and the rear code is W33.
 
Sealed spherical roller bearings have the function of self-aligning, which can automatically adjust the influence of angular deviation caused by poor installation conditions. The adaptability to angular deviation varies with the bearing width series and diameter series. In the case of the same inner diameter, the wider the bearing and the larger the outer diameter, the greater the allowable angular deviation.
 
Sealed spherical roller bearings are divided into two different structures: symmetrical sealed spherical rollers and asymmetrical sealed spherical rollers according to the cross-sectional shape of the rollers. Asymmetrical sealed spherical roller bearings are early products. Currently, they are mainly used for main engine maintenance and new designs. Symmetrical sealed spherical roller bearings are rarely used in the main engine. The internal structure has undergone a comprehensive improvement design and parameter optimization. Compared with the early production of sealed spherical roller bearings, it can withstand greater axial load. This kind of bearing operation The temperature is low, 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 type and CA type
 
C-type bearings are characterized by no ribs on the inner ring and the use of steel stamping cages. The characteristics of CA-type bearings are ribs on both sides of the inner ring and the use of car-made solid cages. In order to improve the lubrication of the bearing, it can be provided to users A sealed spherical roller bearing with an annular oil groove and three oil holes in the outer ring is represented by the bearing code W33. According to user requirements, sealed spherical roller bearings with inner ring oil holes can also be supplied, in order to facilitate customer assembly and disassembly and replacement bearings, sealed spherical roller bearing bearings with a taper in the inner hole can also be provided. The taper hole taper is 1:12 and the code is K. In order to meet the requirements of special users, the inner hole taper can also be provided with a 1:30 The bearing, whose rear code is K30, the tapered bearing in the inner hole can be directly mounted on the tapered journal with a lock nut, or the bearing can be mounted on the cylindrical journal with the aid of an adapter sleeve or a withdrawal sleeve.


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