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Spherical Roller Bearing And Primary Working Mechanism

Time:2019.12.04  Source:Roller Bearings Suppliers


What is a spherical roller bearing?

Spherical roller bearings have two row of symmetrical spherical rollers; the outer ring has a standard spherical raceway, the inner circle has two raceways inclined at an angle to the bearing axis, and has excellent self-aligning performance. When the shaft stressed The bearing can still be used when it is bent or installed with different concentricity. The self-aligning performance varies with the bearing size series. Generally, the allowed self-aligning angle is 1 ~ 2.5 degrees. The outer bearing can also bear the axial load acting in both directions and has better impact resistance. Generally speaking, the working speed allowed by the spherical roller bearing is low.

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The primary working mechanism of spherical roller bearings: 

The inner ring of the rolling bearing is used for assembling with the journal. And the outer ring is used for collecting with the bearing. Usually, the inner circle rotates with the journal, the outer ring is fixed, but the outer ring can also be rotated without the inner ring moving, or the inner and outer rings can be rotated at the same time. When the inner and outer rings turn relatively, the rolling body rolls between the inner and outer rings.


The most common is single row rolling bearing. According to the number of rolling elements, the bearings can also be divided into double-row and multi-row bearings. Two or more rows of rolling elements are installed in the same bearing. Several rolling parts are installed between the bearing ring or the shaft and the seal ring. The cage evenly spaces the rolling elements. The cage prevents the rolling elements from colliding with each other to reduce the resistance so that the bearing can reach a higher speed.

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The classification of bearings is mainly classified according to the shape of rolling bodies, bearing forces, and structural forms. Rotating bearing structures are generally composed of inner rings, outer rings, moving skeletons, and cages.


Roller bearings have various structures. However, the most basic structure is composed of an inner ring, an outer ring, a rolling body, and a cage. Rolling bodies (steel balls, rollers, or needles) are usually arranged in the bearing by an enclosure to move between the two rings. Its shape, size, and quantity directly affect the bearing's load capacity and performance.


For radial bearings, the inner ring usually fits tightly with the shaft and runs together with the shaft. The outer ring usually overfits the bearing housing or the hole in the mechanical house to support it. However, in some cases, the outer ring is also running, and the inner circle is fixed to help, or the inner and outer rings are running at the same time.

Roller bearings

For thrust bearings, a shaft ring that tightly fits and moves together with the shaft is called a seat ring that overfits and supports the bearing housing or the mechanical housing hole. Rolling bodies (steel balls, rollers or needles) are usually arranged in the bearing by a cage to move between the two rings. Its shape, size, and quantity directly affect the bearing's load capacity and performance. In addition to keeping the rolling elements  separated, the cage can also play a role in guiding the rolling elements' rotation and improving the internal lubrication performance of the bearings.


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