Roller bearing

Abstract

The invention discloses a roller bearing, which comprises an inner ring with a raceway on the outer periphery, an outer ring with a raceway on the inner circumference, a roller between the inner ring raceway and the outer ring raceway, a cage and a thrust structure. A thrust contact region on the roller end face is a composite lubricating structure which comprises a solid lubricating coating and a surface microtexture, wherein the surface microtexture is a uniformly distributed micro-pit array. The roller bearing provided by the invention has the advantages of anti-jamming capability enhancement, low friction and high service stability, and is applicable to efficient transmission of a spindle mechanism bearing axial or axial-radial joint load under harsh conditions of high speed, heavy load, impact load and dust.

Description

technical field [0001] The invention relates to a roller bearing, especially the roller bearing used under heavy load, which needs to bear high axial load or combined axial and radial load. Background technique [0002] The heavy-duty roller bearings used in machinery such as the main shaft of large-scale wind turbines or the main shaft of high-speed railway locomotives must not only meet the radial load, but also need to bear a certain axial load. This type of bearing often has a thrust design, that is, a rib or a retaining ring is designed on the inner ring or (and) outer ring of the bearing to prevent the axial movement of the roller. Different from the rolling contact between the rolling surface of the roller and the raceway, the thrust contact area of ​​the end surface of the bearing roller and the rib (ring) is a sliding contact. When the bearing lubrication is poor due to harsh working conditions such as start-stop, heavy load or impact load, the lubrication state be...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the object of the present invention is to provide a roller bearing, especially a roller bearing used under heavy loads, which needs to bear high axial load or combined shaft and radial load, which not only has an improved roller end stop Pushing the lubrication state and wear resistance of the contact area can effectively avoid the bearing friction and wear problems caused by hard particles such as grinding debris or external pollutants, and further improve the roller bearings in harsh conditions such as high speed, heavy load, impact load and sand and dust. Service performance under conditions

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