Multilayer rolling bearing

Abstract

The invention relates to a multilayer rolling bearing, which comprises an inner ring, at least one middle ring, an outer ring and at least two rolling layers, wherein the rolling layers comprises an inner rolling layer and an outer rolling layer, each rolling layer comprises a rolling body and a retainer, each retainer is used for containing rolling bodies so that the positions between the rolling bodies are relatively fixed, two rolling bodies positioned in the inner rolling layer form a row in a side-by-side way, a plurality of rows of rolling bodies are distributed in each retainer, and the axial lines of the side-by-side rolling bodies are parallel to the axial line of the inner rolling layer. The multilayer rolling bearing has the advantages that the number of stress cycle times and the number of rolling times of the rolling bodies in the rolling process are reduced, so the service life is prolonged, and the bearing safety is improved.

Description

technical field [0001] The invention relates to a rolling bearing, in particular to a multilayer rolling bearing. Background technique [0002] During the use of rolling bearings, due to many reasons, when the performance indicators fail to meet the requirements of use, failure or damage occurs. Common failure forms include fatigue spalling, wear, plastic deformation, corrosion, burns, electrical corrosion, and cage damage. [0003] There are many types of fatigue, and for rolling bearings it mainly refers to contact fatigue. Under the repeated action of contact stress on the surface of each rolling element of a rolling bearing ring, the phenomenon that the metal on the rolling surface peels off from the metal matrix in the form of points or flakes is called fatigue spalling. Pitting corrosion is also a fatigue phenomenon caused by material fatigue, but the shape and size are small, and fatigue spalling will form after pitting corrosion expands. For rolling bearings that ...

AI Technical Summary

Problems solved by technology

For rolling bearings that are generally used for a long time, under load, there is a huge cyclic contact stress between the surfaces of the rolling elements and the inner and outer rings, so that fatigue pitting occurs on the working surface of the bearing (rolling elements and inner and outer ring raceway surfaces) (Pitting), in severe cases, the surface metal will peel off in flakes and form pits, so that it will lose its normal working ability

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